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https://git.savannah.gnu.org/git/emacs.git
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Build with C11 if available
* admin/merge-gnulib (GNULIB_MODULES): Add std-gnu11. * m4/std-gnu11.m4: New file, from gnulib. * lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
This commit is contained in:
Paul Eggert
parent
d743b56f6c
commit
b50075dd05
@ -35,7 +35,7 @@ GNULIB_MODULES='
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ignore-value intprops largefile lstat
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manywarnings memrchr mkostemp mktime
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pipe2 pselect pthread_sigmask putenv qcopy-acl readlink readlinkat
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sig2str socklen stat-time stdalign stddef stdio
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sig2str socklen stat-time std-gnu11 stdalign stddef stdio
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stpcpy strftime strtoimax strtoumax symlink sys_stat
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sys_time time time_r time_rz timegm timer-time timespec-add timespec-sub
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unsetenv update-copyright utimens
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@ -21,7 +21,7 @@
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# the same distribution terms as the rest of that program.
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#
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# Generated by gnulib-tool.
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# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=close --avoid=dup --avoid=fchdir --avoid=flexmember --avoid=fstat --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow --avoid=open --avoid=openat-die --avoid=opendir --avoid=raise --avoid=save-cwd --avoid=select --avoid=setenv --avoid=sigprocmask --avoid=stdarg --avoid=stdbool --avoid=threadlib --avoid=unsetenv --makefile-name=gnulib.mk --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt binary-io byteswap c-ctype c-strcase careadlinkat close-stream count-one-bits count-trailing-zeros crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 dtoastr dtotimespec dup2 environ execinfo faccessat fcntl fcntl-h fdatasync fdopendir filemode fstatat fsync getloadavg getopt-gnu gettime gettimeofday gitlog-to-changelog ignore-value intprops largefile lstat manywarnings memrchr mkostemp mktime pipe2 pselect pthread_sigmask putenv qcopy-acl readlink readlinkat sig2str socklen stat-time stdalign stddef stdio stpcpy strftime strtoimax strtoumax symlink sys_stat sys_time time time_r time_rz timegm timer-time timespec-add timespec-sub unsetenv update-copyright utimens vla warnings
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# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=close --avoid=dup --avoid=fchdir --avoid=flexmember --avoid=fstat --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow --avoid=open --avoid=openat-die --avoid=opendir --avoid=raise --avoid=save-cwd --avoid=select --avoid=setenv --avoid=sigprocmask --avoid=stdarg --avoid=stdbool --avoid=threadlib --avoid=unsetenv --makefile-name=gnulib.mk --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt binary-io byteswap c-ctype c-strcase careadlinkat close-stream count-one-bits count-trailing-zeros crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 dtoastr dtotimespec dup2 environ execinfo faccessat fcntl fcntl-h fdatasync fdopendir filemode fstatat fsync getloadavg getopt-gnu gettime gettimeofday gitlog-to-changelog ignore-value intprops largefile lstat manywarnings memrchr mkostemp mktime pipe2 pselect pthread_sigmask putenv qcopy-acl readlink readlinkat sig2str socklen stat-time std-gnu11 stdalign stddef stdio stpcpy strftime strtoimax strtoumax symlink sys_stat sys_time time time_r time_rz timegm timer-time timespec-add timespec-sub unsetenv update-copyright utimens vla warnings
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MOSTLYCLEANFILES += core *.stackdump
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@ -126,6 +126,7 @@ AC_DEFUN([gl_EARLY],
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# Code from module ssize_t:
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# Code from module stat:
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# Code from module stat-time:
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# Code from module std-gnu11:
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# Code from module stdalign:
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# Code from module stddef:
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# Code from module stdint:
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@ -1052,6 +1053,7 @@ AC_DEFUN([gl_FILE_LIST], [
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m4/st_dm_mode.m4
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m4/stat-time.m4
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m4/stat.m4
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m4/std-gnu11.m4
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m4/stdalign.m4
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m4/stddef_h.m4
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m4/stdint.m4
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818
m4/std-gnu11.m4
Normal file
818
m4/std-gnu11.m4
Normal file
@ -0,0 +1,818 @@
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# Prefer GNU C11 and C++11 to earlier versions. -*- coding: utf-8 -*-
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# This implementation is taken from GNU Autoconf lib/autoconf/c.m4
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# commit 5ad3567c3cbd90b4faa6539c35bc4a8c6500f535
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# dated 2015-10-08 10:12:41 2015 +0200.
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# This implementation will be obsolete once we can assume Autoconf 2.70
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# or later is installed everywhere a Gnulib program might be developed.
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# Copyright (C) 2001-2016 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Written by David MacKenzie, with help from
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# Akim Demaille, Paul Eggert,
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# François Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
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# Roland McGrath, Noah Friedman, david d zuhn, and many others.
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# AC_PROG_CC([COMPILER ...])
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# --------------------------
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# COMPILER ... is a space separated list of C compilers to search for.
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# This just gives the user an opportunity to specify an alternative
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# search list for the C compiler.
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AC_DEFUN_ONCE([AC_PROG_CC],
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[AC_LANG_PUSH(C)dnl
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AC_ARG_VAR([CC], [C compiler command])dnl
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AC_ARG_VAR([CFLAGS], [C compiler flags])dnl
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_AC_ARG_VAR_LDFLAGS()dnl
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_AC_ARG_VAR_LIBS()dnl
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_AC_ARG_VAR_CPPFLAGS()dnl
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m4_ifval([$1],
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[AC_CHECK_TOOLS(CC, [$1])],
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[AC_CHECK_TOOL(CC, gcc)
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if test -z "$CC"; then
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dnl Here we want:
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dnl AC_CHECK_TOOL(CC, cc)
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dnl but without the check for a tool without the prefix.
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dnl Until the check is removed from there, copy the code:
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if test -n "$ac_tool_prefix"; then
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AC_CHECK_PROG(CC, [${ac_tool_prefix}cc], [${ac_tool_prefix}cc])
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fi
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fi
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if test -z "$CC"; then
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AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
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fi
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if test -z "$CC"; then
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AC_CHECK_TOOLS(CC, cl.exe)
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fi
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])
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test -z "$CC" && AC_MSG_FAILURE([no acceptable C compiler found in \$PATH])
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# Provide some information about the compiler.
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_AS_ECHO_LOG([checking for _AC_LANG compiler version])
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set X $ac_compile
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ac_compiler=$[2]
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for ac_option in --version -v -V -qversion -version; do
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_AC_DO_LIMIT([$ac_compiler $ac_option >&AS_MESSAGE_LOG_FD])
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done
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m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
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m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
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_AC_LANG_COMPILER_GNU
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if test $ac_compiler_gnu = yes; then
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GCC=yes
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else
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GCC=
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fi
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_AC_PROG_CC_G
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dnl
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dnl Set ac_prog_cc_stdc to the supported C version.
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dnl Also set the documented variable ac_cv_prog_cc_stdc;
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dnl its name was chosen when it was cached, but it is no longer cached.
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_AC_PROG_CC_C11([ac_prog_cc_stdc=c11
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ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c11],
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[_AC_PROG_CC_C99([ac_prog_cc_stdc=c99
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ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c99],
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[_AC_PROG_CC_C89([ac_prog_cc_stdc=c89
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ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c89],
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[ac_prog_cc_stdc=no
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ac_cv_prog_cc_stdc=no])])])
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dnl
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AC_LANG_POP(C)dnl
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])# AC_PROG_CC
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# AC_PROG_CXX([LIST-OF-COMPILERS])
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# --------------------------------
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# LIST-OF-COMPILERS is a space separated list of C++ compilers to search
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# for (if not specified, a default list is used). This just gives the
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# user an opportunity to specify an alternative search list for the C++
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# compiler.
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# aCC HP-UX C++ compiler much better than `CC', so test before.
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# FCC Fujitsu C++ compiler
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# KCC KAI C++ compiler
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# RCC Rational C++
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# xlC_r AIX C Set++ (with support for reentrant code)
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# xlC AIX C Set++
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AC_DEFUN([AC_PROG_CXX],
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[AC_LANG_PUSH(C++)dnl
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AC_ARG_VAR([CXX], [C++ compiler command])dnl
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AC_ARG_VAR([CXXFLAGS], [C++ compiler flags])dnl
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_AC_ARG_VAR_LDFLAGS()dnl
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_AC_ARG_VAR_LIBS()dnl
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_AC_ARG_VAR_CPPFLAGS()dnl
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_AC_ARG_VAR_PRECIOUS([CCC])dnl
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if test -z "$CXX"; then
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if test -n "$CCC"; then
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CXX=$CCC
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else
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AC_CHECK_TOOLS(CXX,
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[m4_default([$1],
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[g++ c++ gpp aCC CC cxx cc++ cl.exe FCC KCC RCC xlC_r xlC])],
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g++)
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fi
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fi
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# Provide some information about the compiler.
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_AS_ECHO_LOG([checking for _AC_LANG compiler version])
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set X $ac_compile
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ac_compiler=$[2]
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for ac_option in --version -v -V -qversion; do
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_AC_DO_LIMIT([$ac_compiler $ac_option >&AS_MESSAGE_LOG_FD])
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done
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m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
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m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
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_AC_LANG_COMPILER_GNU
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if test $ac_compiler_gnu = yes; then
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GXX=yes
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else
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GXX=
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fi
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_AC_PROG_CXX_G
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_AC_PROG_CXX_CXX11([ac_prog_cxx_stdcxx=cxx11
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ac_cv_prog_cxx_stdcxx=$ac_cv_prog_cxx_cxx11
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ac_cv_prog_cxx_cxx98=$ac_cv_prog_cxx_cxx11],
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[_AC_PROG_CXX_CXX98([ac_prog_cxx_stdcxx=cxx98
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ac_cv_prog_cxx_stdcxx=$ac_cv_prog_cxx_cxx98],
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[ac_prog_cxx_stdcxx=no
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ac_cv_prog_cxx_stdcxx=no])])
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AC_LANG_POP(C++)dnl
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])# AC_PROG_CXX
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# _AC_C_STD_TRY(STANDARD, TEST-PROLOGUE, TEST-BODY, OPTION-LIST,
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# ACTION-IF-AVAILABLE, ACTION-IF-UNAVAILABLE)
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# --------------------------------------------------------------
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# Check whether the C compiler accepts features of STANDARD (e.g `c89', `c99')
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# by trying to compile a program of TEST-PROLOGUE and TEST-BODY. If this fails,
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# try again with each compiler option in the space-separated OPTION-LIST; if one
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# helps, append it to CC. If eventually successful, run ACTION-IF-AVAILABLE,
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# else ACTION-IF-UNAVAILABLE.
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AC_DEFUN([_AC_C_STD_TRY],
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[AC_MSG_CHECKING([for $CC option to enable ]m4_translit($1, [c], [C])[ features])
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AC_CACHE_VAL(ac_cv_prog_cc_$1,
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[ac_cv_prog_cc_$1=no
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ac_save_CC=$CC
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AC_LANG_CONFTEST([AC_LANG_PROGRAM([$2], [$3])])
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for ac_arg in '' $4
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do
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CC="$ac_save_CC $ac_arg"
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_AC_COMPILE_IFELSE([], [ac_cv_prog_cc_$1=$ac_arg])
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test "x$ac_cv_prog_cc_$1" != "xno" && break
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done
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rm -f conftest.$ac_ext
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CC=$ac_save_CC
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])# AC_CACHE_VAL
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ac_prog_cc_stdc_options=
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case "x$ac_cv_prog_cc_$1" in
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x)
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AC_MSG_RESULT([none needed]) ;;
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xno)
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AC_MSG_RESULT([unsupported]) ;;
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*)
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ac_prog_cc_stdc_options=" $ac_cv_prog_cc_$1"
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CC=$CC$ac_prog_cc_stdc_options
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AC_MSG_RESULT([$ac_cv_prog_cc_$1]) ;;
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esac
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AS_IF([test "x$ac_cv_prog_cc_$1" != xno], [$5], [$6])
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])# _AC_C_STD_TRY
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# _AC_C_C99_TEST_HEADER
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# ---------------------
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# A C header suitable for testing for C99.
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AC_DEFUN([_AC_C_C99_TEST_HEADER],
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[[#include <stdarg.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <wchar.h>
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#include <stdio.h>
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// Check varargs macros. These examples are taken from C99 6.10.3.5.
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#define debug(...) fprintf (stderr, __VA_ARGS__)
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#define showlist(...) puts (#__VA_ARGS__)
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#define report(test,...) ((test) ? puts (#test) : printf (__VA_ARGS__))
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static void
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test_varargs_macros (void)
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{
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int x = 1234;
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int y = 5678;
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debug ("Flag");
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debug ("X = %d\n", x);
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showlist (The first, second, and third items.);
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report (x>y, "x is %d but y is %d", x, y);
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}
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// Check long long types.
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#define BIG64 18446744073709551615ull
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#define BIG32 4294967295ul
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#define BIG_OK (BIG64 / BIG32 == 4294967297ull && BIG64 % BIG32 == 0)
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#if !BIG_OK
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your preprocessor is broken;
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#endif
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#if BIG_OK
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#else
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your preprocessor is broken;
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#endif
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static long long int bignum = -9223372036854775807LL;
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static unsigned long long int ubignum = BIG64;
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struct incomplete_array
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{
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int datasize;
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double data[];
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};
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struct named_init {
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int number;
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const wchar_t *name;
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double average;
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};
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typedef const char *ccp;
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static inline int
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test_restrict (ccp restrict text)
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{
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// See if C++-style comments work.
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// Iterate through items via the restricted pointer.
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// Also check for declarations in for loops.
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for (unsigned int i = 0; *(text+i) != '\0'; ++i)
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continue;
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return 0;
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}
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// Check varargs and va_copy.
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static bool
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test_varargs (const char *format, ...)
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{
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va_list args;
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va_start (args, format);
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va_list args_copy;
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va_copy (args_copy, args);
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const char *str = "";
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int number = 0;
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float fnumber = 0;
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while (*format)
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{
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switch (*format++)
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{
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case 's': // string
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str = va_arg (args_copy, const char *);
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break;
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case 'd': // int
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number = va_arg (args_copy, int);
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break;
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case 'f': // float
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fnumber = va_arg (args_copy, double);
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break;
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default:
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break;
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}
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}
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va_end (args_copy);
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va_end (args);
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return *str && number && fnumber;
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}]])# _AC_C_C99_TEST_HEADER
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# _AC_C_C99_TEST_BODY
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# -------------------
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||||
# A C body suitable for testing for C99, assuming the corresponding header.
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AC_DEFUN([_AC_C_C99_TEST_BODY],
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[[
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// Check bool.
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_Bool success = false;
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// Check restrict.
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if (test_restrict ("String literal") == 0)
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success = true;
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char *restrict newvar = "Another string";
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||||
// Check varargs.
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success &= test_varargs ("s, d' f .", "string", 65, 34.234);
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test_varargs_macros ();
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// Check flexible array members.
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struct incomplete_array *ia =
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malloc (sizeof (struct incomplete_array) + (sizeof (double) * 10));
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ia->datasize = 10;
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for (int i = 0; i < ia->datasize; ++i)
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ia->data[i] = i * 1.234;
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// Check named initializers.
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struct named_init ni = {
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.number = 34,
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.name = L"Test wide string",
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.average = 543.34343,
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};
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ni.number = 58;
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int dynamic_array[ni.number];
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dynamic_array[ni.number - 1] = 543;
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// work around unused variable warnings
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return (!success || bignum == 0LL || ubignum == 0uLL || newvar[0] == 'x'
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|| dynamic_array[ni.number - 1] != 543);
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]])
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# _AC_PROG_CC_C99 ([ACTION-IF-AVAILABLE], [ACTION-IF-UNAVAILABLE])
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# ----------------------------------------------------------------
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# If the C compiler is not in ISO C99 mode by default, try to add an
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||||
# option to output variable CC to make it so. This macro tries
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# various options that select ISO C99 on some system or another. It
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||||
# considers the compiler to be in ISO C99 mode if it handles _Bool,
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||||
# // comments, flexible array members, inline, long long int, mixed
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||||
# code and declarations, named initialization of structs, restrict,
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# va_copy, varargs macros, variable declarations in for loops and
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# variable length arrays.
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AC_DEFUN([_AC_PROG_CC_C99],
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||||
[_AC_C_STD_TRY([c99],
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||||
[_AC_C_C99_TEST_HEADER],
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||||
[_AC_C_C99_TEST_BODY],
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dnl Try
|
||||
dnl GCC -std=gnu99 (unused restrictive modes: -std=c99 -std=iso9899:1999)
|
||||
dnl IBM XL C -qlanglvl=extc1x (V12.1; does not pass C11 test)
|
||||
dnl IBM XL C -qlanglvl=extc99
|
||||
dnl (pre-V12.1; unused restrictive mode: -qlanglvl=stdc99)
|
||||
dnl HP cc -AC99
|
||||
dnl Intel ICC -std=c99, -c99 (deprecated)
|
||||
dnl IRIX -c99
|
||||
dnl Solaris -D_STDC_C99=
|
||||
dnl cc's -xc99 option uses linker magic to define the external
|
||||
dnl symbol __xpg4 as if by "int __xpg4 = 1;", which enables C99
|
||||
dnl behavior for C library functions. This is not wanted here,
|
||||
dnl because it means that a single module compiled with -xc99
|
||||
dnl alters C runtime behavior for the entire program, not for
|
||||
dnl just the module. Instead, define the (private) symbol
|
||||
dnl _STDC_C99, which suppresses a bogus failure in <stdbool.h>.
|
||||
dnl The resulting compiler passes the test case here, and that's
|
||||
dnl good enough. For more, please see the thread starting at:
|
||||
dnl http://lists.gnu.org/archive/html/autoconf/2010-12/msg00059.html
|
||||
dnl Tru64 -c99
|
||||
dnl with extended modes being tried first.
|
||||
[[-std=gnu99 -std=c99 -c99 -AC99 -D_STDC_C99= -qlanglvl=extc1x -qlanglvl=extc99]], [$1], [$2])[]dnl
|
||||
])# _AC_PROG_CC_C99
|
||||
|
||||
|
||||
# _AC_PROG_CC_C11 ([ACTION-IF-AVAILABLE], [ACTION-IF-UNAVAILABLE])
|
||||
# ----------------------------------------------------------------
|
||||
# If the C compiler is not in ISO C11 mode by default, try to add an
|
||||
# option to output variable CC to make it so. This macro tries
|
||||
# various options that select ISO C11 on some system or another. It
|
||||
# considers the compiler to be in ISO C11 mode if it handles _Alignas,
|
||||
# _Alignof, _Noreturn, _Static_assert, UTF-8 string literals,
|
||||
# duplicate typedefs, and anonymous structures and unions.
|
||||
AC_DEFUN([_AC_PROG_CC_C11],
|
||||
[_AC_C_STD_TRY([c11],
|
||||
[_AC_C_C99_TEST_HEADER[
|
||||
// Check _Alignas.
|
||||
char _Alignas (double) aligned_as_double;
|
||||
char _Alignas (0) no_special_alignment;
|
||||
extern char aligned_as_int;
|
||||
char _Alignas (0) _Alignas (int) aligned_as_int;
|
||||
|
||||
// Check _Alignof.
|
||||
enum
|
||||
{
|
||||
int_alignment = _Alignof (int),
|
||||
int_array_alignment = _Alignof (int[100]),
|
||||
char_alignment = _Alignof (char)
|
||||
};
|
||||
_Static_assert (0 < -_Alignof (int), "_Alignof is signed");
|
||||
|
||||
// Check _Noreturn.
|
||||
int _Noreturn does_not_return (void) { for (;;) continue; }
|
||||
|
||||
// Check _Static_assert.
|
||||
struct test_static_assert
|
||||
{
|
||||
int x;
|
||||
_Static_assert (sizeof (int) <= sizeof (long int),
|
||||
"_Static_assert does not work in struct");
|
||||
long int y;
|
||||
};
|
||||
|
||||
// Check UTF-8 literals.
|
||||
#define u8 syntax error!
|
||||
char const utf8_literal[] = u8"happens to be ASCII" "another string";
|
||||
|
||||
// Check duplicate typedefs.
|
||||
typedef long *long_ptr;
|
||||
typedef long int *long_ptr;
|
||||
typedef long_ptr long_ptr;
|
||||
|
||||
// Anonymous structures and unions -- taken from C11 6.7.2.1 Example 1.
|
||||
struct anonymous
|
||||
{
|
||||
union {
|
||||
struct { int i; int j; };
|
||||
struct { int k; long int l; } w;
|
||||
};
|
||||
int m;
|
||||
} v1;
|
||||
]],
|
||||
[_AC_C_C99_TEST_BODY[
|
||||
v1.i = 2;
|
||||
v1.w.k = 5;
|
||||
_Static_assert (&v1.i == &v1.w.k, "Anonymous union alignment botch");
|
||||
]],
|
||||
dnl Try
|
||||
dnl GCC -std=gnu11 (unused restrictive mode: -std=c11)
|
||||
dnl with extended modes being tried first.
|
||||
dnl
|
||||
dnl Do not try -qlanglvl=extc1x, because IBM XL C V12.1 (the latest version as
|
||||
dnl of September 2012) does not pass the C11 test. For now, try extc1x when
|
||||
dnl compiling the C99 test instead, since it enables _Static_assert and
|
||||
dnl _Noreturn, which is a win. If -qlanglvl=extc11 or -qlanglvl=extc1x passes
|
||||
dnl the C11 test in some future version of IBM XL C, we'll add it here,
|
||||
dnl preferably extc11.
|
||||
[[-std=gnu11]], [$1], [$2])[]dnl
|
||||
])# _AC_PROG_CC_C11
|
||||
|
||||
|
||||
# AC_PROG_CC_C89
|
||||
# --------------
|
||||
# Do not use AU_ALIAS here and in AC_PROG_CC_C99 and AC_PROG_CC_STDC,
|
||||
# as that'd be incompatible with how Automake redefines AC_PROG_CC. See
|
||||
# <http://lists.gnu.org/archive/html/autoconf/2012-10/msg00048.html>.
|
||||
AU_DEFUN([AC_PROG_CC_C89],
|
||||
[AC_REQUIRE([AC_PROG_CC])],
|
||||
[$0 is obsolete; use AC_PROG_CC]
|
||||
)
|
||||
|
||||
# AC_PROG_CC_C99
|
||||
# --------------
|
||||
AU_DEFUN([AC_PROG_CC_C99],
|
||||
[AC_REQUIRE([AC_PROG_CC])],
|
||||
[$0 is obsolete; use AC_PROG_CC]
|
||||
)
|
||||
|
||||
# AC_PROG_CC_STDC
|
||||
# ---------------
|
||||
AU_DEFUN([AC_PROG_CC_STDC],
|
||||
[AC_REQUIRE([AC_PROG_CC])],
|
||||
[$0 is obsolete; use AC_PROG_CC]
|
||||
)
|
||||
|
||||
|
||||
# AC_C_PROTOTYPES
|
||||
# ---------------
|
||||
# Check if the C compiler supports prototypes, included if it needs
|
||||
# options.
|
||||
AC_DEFUN([AC_C_PROTOTYPES],
|
||||
[AC_REQUIRE([AC_PROG_CC])dnl
|
||||
if test "$ac_prog_cc_stdc" != no; then
|
||||
AC_DEFINE(PROTOTYPES, 1,
|
||||
[Define to 1 if the C compiler supports function prototypes.])
|
||||
AC_DEFINE(__PROTOTYPES, 1,
|
||||
[Define like PROTOTYPES; this can be used by system headers.])
|
||||
fi
|
||||
])# AC_C_PROTOTYPES
|
||||
|
||||
|
||||
# _AC_CXX_STD_TRY(STANDARD, TEST-PROLOGUE, TEST-BODY, OPTION-LIST,
|
||||
# ACTION-IF-AVAILABLE, ACTION-IF-UNAVAILABLE)
|
||||
# ----------------------------------------------------------------
|
||||
# Check whether the C++ compiler accepts features of STANDARD (e.g
|
||||
# `cxx98', `cxx11') by trying to compile a program of TEST-PROLOGUE
|
||||
# and TEST-BODY. If this fails, try again with each compiler option
|
||||
# in the space-separated OPTION-LIST; if one helps, append it to CXX.
|
||||
# If eventually successful, run ACTION-IF-AVAILABLE, else
|
||||
# ACTION-IF-UNAVAILABLE.
|
||||
AC_DEFUN([_AC_CXX_STD_TRY],
|
||||
[AC_MSG_CHECKING([for $CXX option to enable ]m4_translit(m4_translit($1, [x], [+]), [a-z], [A-Z])[ features])
|
||||
AC_LANG_PUSH(C++)dnl
|
||||
AC_CACHE_VAL(ac_cv_prog_cxx_$1,
|
||||
[ac_cv_prog_cxx_$1=no
|
||||
ac_save_CXX=$CXX
|
||||
AC_LANG_CONFTEST([AC_LANG_PROGRAM([$2], [$3])])
|
||||
for ac_arg in '' $4
|
||||
do
|
||||
CXX="$ac_save_CXX $ac_arg"
|
||||
_AC_COMPILE_IFELSE([], [ac_cv_prog_cxx_$1=$ac_arg])
|
||||
test "x$ac_cv_prog_cxx_$1" != "xno" && break
|
||||
done
|
||||
rm -f conftest.$ac_ext
|
||||
CXX=$ac_save_CXX
|
||||
])# AC_CACHE_VAL
|
||||
ac_prog_cxx_stdcxx_options=
|
||||
case "x$ac_cv_prog_cxx_$1" in
|
||||
x)
|
||||
AC_MSG_RESULT([none needed]) ;;
|
||||
xno)
|
||||
AC_MSG_RESULT([unsupported]) ;;
|
||||
*)
|
||||
ac_prog_cxx_stdcxx_options=" $ac_cv_prog_cxx_$1"
|
||||
CXX=$CXX$ac_prog_cxx_stdcxx_options
|
||||
AC_MSG_RESULT([$ac_cv_prog_cxx_$1]) ;;
|
||||
esac
|
||||
AC_LANG_POP(C++)dnl
|
||||
AS_IF([test "x$ac_cv_prog_cxx_$1" != xno], [$5], [$6])
|
||||
])# _AC_CXX_STD_TRY
|
||||
|
||||
# _AC_CXX_CXX98_TEST_HEADER
|
||||
# -------------------------
|
||||
# A C++ header suitable for testing for CXX98.
|
||||
AC_DEFUN([_AC_CXX_CXX98_TEST_HEADER],
|
||||
[[
|
||||
#include <algorithm>
|
||||
#include <cstdlib>
|
||||
#include <fstream>
|
||||
#include <iomanip>
|
||||
#include <iostream>
|
||||
#include <list>
|
||||
#include <map>
|
||||
#include <set>
|
||||
#include <sstream>
|
||||
#include <stdexcept>
|
||||
#include <string>
|
||||
#include <utility>
|
||||
#include <vector>
|
||||
|
||||
namespace test {
|
||||
typedef std::vector<std::string> string_vec;
|
||||
typedef std::pair<int,bool> map_value;
|
||||
typedef std::map<std::string,map_value> map_type;
|
||||
typedef std::set<int> set_type;
|
||||
|
||||
template<typename T>
|
||||
class printer {
|
||||
public:
|
||||
printer(std::ostringstream& os): os(os) {}
|
||||
void operator() (T elem) { os << elem << std::endl; }
|
||||
private:
|
||||
std::ostringstream& os;
|
||||
};
|
||||
}
|
||||
]])# _AC_CXX_CXX98_TEST_HEADER
|
||||
|
||||
# _AC_CXX_CXX98_TEST_BODY
|
||||
# -----------------------
|
||||
# A C++ body suitable for testing for CXX98, assuming the corresponding header.
|
||||
AC_DEFUN([_AC_CXX_CXX98_TEST_BODY],
|
||||
[[
|
||||
|
||||
try {
|
||||
// Basic string.
|
||||
std::string teststr("ASCII text");
|
||||
teststr += " string";
|
||||
|
||||
// Simple vector.
|
||||
test::string_vec testvec;
|
||||
testvec.push_back(teststr);
|
||||
testvec.push_back("foo");
|
||||
testvec.push_back("bar");
|
||||
if (testvec.size() != 3) {
|
||||
throw std::runtime_error("vector size is not 1");
|
||||
}
|
||||
|
||||
// Dump vector into stringstream and obtain string.
|
||||
std::ostringstream os;
|
||||
for (test::string_vec::const_iterator i = testvec.begin();
|
||||
i != testvec.end(); ++i) {
|
||||
if (i + 1 != testvec.end()) {
|
||||
os << teststr << '\n';
|
||||
}
|
||||
}
|
||||
// Check algorithms work.
|
||||
std::for_each(testvec.begin(), testvec.end(), test::printer<std::string>(os));
|
||||
std::string os_out = os.str();
|
||||
|
||||
// Test pair and map.
|
||||
test::map_type testmap;
|
||||
testmap.insert(std::make_pair(std::string("key"),
|
||||
std::make_pair(53,false)));
|
||||
|
||||
// Test set.
|
||||
int values[] = {9, 7, 13, 15, 4, 18, 12, 10, 5, 3, 14, 19, 17, 8, 6, 20, 16, 2, 11, 1};
|
||||
test::set_type testset(values, values + sizeof(values)/sizeof(values[0]));
|
||||
std::list<int> testlist(testset.begin(), testset.end());
|
||||
std::copy(testset.begin(), testset.end(), std::back_inserter(testlist));
|
||||
} catch (const std::exception& e) {
|
||||
std::cerr << "Caught exception: " << e.what() << std::endl;
|
||||
|
||||
// Test fstream
|
||||
std::ofstream of("test.txt");
|
||||
of << "Test ASCII text\n" << std::flush;
|
||||
of << "N= " << std::hex << std::setw(8) << std::left << 534 << std::endl;
|
||||
of.close();
|
||||
}
|
||||
std::exit(0);
|
||||
]])
|
||||
|
||||
# _AC_CXX_CXX11_TEST_HEADER
|
||||
# -------------------------
|
||||
# A C++ header suitable for testing for CXX11.
|
||||
AC_DEFUN([_AC_CXX_CXX11_TEST_HEADER],
|
||||
[[
|
||||
#include <deque>
|
||||
#include <functional>
|
||||
#include <memory>
|
||||
#include <tuple>
|
||||
#include <array>
|
||||
#include <regex>
|
||||
#include <iostream>
|
||||
|
||||
namespace cxx11test
|
||||
{
|
||||
typedef std::shared_ptr<std::string> sptr;
|
||||
typedef std::weak_ptr<std::string> wptr;
|
||||
|
||||
typedef std::tuple<std::string,int,double> tp;
|
||||
typedef std::array<int, 20> int_array;
|
||||
|
||||
constexpr int get_val() { return 20; }
|
||||
|
||||
struct testinit
|
||||
{
|
||||
int i;
|
||||
double d;
|
||||
};
|
||||
|
||||
class delegate {
|
||||
public:
|
||||
delegate(int n) : n(n) {}
|
||||
delegate(): delegate(2354) {}
|
||||
|
||||
virtual int getval() { return this->n; };
|
||||
protected:
|
||||
int n;
|
||||
};
|
||||
|
||||
class overridden : public delegate {
|
||||
public:
|
||||
overridden(int n): delegate(n) {}
|
||||
virtual int getval() override final { return this->n * 2; }
|
||||
};
|
||||
|
||||
class nocopy {
|
||||
public:
|
||||
nocopy(int i): i(i) {}
|
||||
nocopy() = default;
|
||||
nocopy(const nocopy&) = delete;
|
||||
nocopy & operator=(const nocopy&) = delete;
|
||||
private:
|
||||
int i;
|
||||
};
|
||||
}
|
||||
]])# _AC_CXX_CXX11_TEST_HEADER
|
||||
|
||||
# _AC_CXX_CXX11_TEST_BODY
|
||||
# -----------------------
|
||||
# A C++ body suitable for testing for CXX11, assuming the corresponding header.
|
||||
AC_DEFUN([_AC_CXX_CXX11_TEST_BODY],
|
||||
[[
|
||||
{
|
||||
// Test auto and decltype
|
||||
std::deque<int> d;
|
||||
d.push_front(43);
|
||||
d.push_front(484);
|
||||
d.push_front(3);
|
||||
d.push_front(844);
|
||||
int total = 0;
|
||||
for (auto i = d.begin(); i != d.end(); ++i) { total += *i; }
|
||||
|
||||
auto a1 = 6538;
|
||||
auto a2 = 48573953.4;
|
||||
auto a3 = "String literal";
|
||||
|
||||
decltype(a2) a4 = 34895.034;
|
||||
}
|
||||
{
|
||||
// Test constexpr
|
||||
short sa[cxx11test::get_val()] = { 0 };
|
||||
}
|
||||
{
|
||||
// Test initialiser lists
|
||||
cxx11test::testinit il = { 4323, 435234.23544 };
|
||||
}
|
||||
{
|
||||
// Test range-based for and lambda
|
||||
cxx11test::int_array array = {9, 7, 13, 15, 4, 18, 12, 10, 5, 3, 14, 19, 17, 8, 6, 20, 16, 2, 11, 1};
|
||||
for (int &x : array) { x += 23; }
|
||||
std::for_each(array.begin(), array.end(), [](int v1){ std::cout << v1; });
|
||||
}
|
||||
{
|
||||
using cxx11test::sptr;
|
||||
using cxx11test::wptr;
|
||||
|
||||
sptr sp(new std::string("ASCII string"));
|
||||
wptr wp(sp);
|
||||
sptr sp2(wp);
|
||||
}
|
||||
{
|
||||
cxx11test::tp tuple("test", 54, 45.53434);
|
||||
double d = std::get<2>(tuple);
|
||||
std::string s;
|
||||
int i;
|
||||
std::tie(s,i,d) = tuple;
|
||||
}
|
||||
{
|
||||
static std::regex filename_regex("^_?([a-z0-9_.]+-)+[a-z0-9]+$");
|
||||
std::string testmatch("Test if this string matches");
|
||||
bool match = std::regex_search(testmatch, filename_regex);
|
||||
}
|
||||
{
|
||||
cxx11test::int_array array = {9, 7, 13, 15, 4, 18, 12, 10, 5, 3, 14, 19, 17, 8, 6, 20, 16, 2, 11, 1};
|
||||
cxx11test::int_array::size_type size = array.size();
|
||||
}
|
||||
{
|
||||
// Test constructor delegation
|
||||
cxx11test::delegate d1;
|
||||
cxx11test::delegate d2();
|
||||
cxx11test::delegate d3(45);
|
||||
}
|
||||
{
|
||||
// Test override and final
|
||||
cxx11test::overridden o1(55464);
|
||||
}
|
||||
{
|
||||
// Test nullptr
|
||||
char *c = nullptr;
|
||||
}
|
||||
{
|
||||
// Test template brackets
|
||||
std::vector<std::pair<int,char*>> v1;
|
||||
}
|
||||
{
|
||||
// Unicode literals
|
||||
char *utf8 = u8"UTF-8 string \u2500";
|
||||
char16_t *utf16 = u"UTF-8 string \u2500";
|
||||
char32_t *utf32 = U"UTF-32 string \u2500";
|
||||
}
|
||||
]])
|
||||
|
||||
# _AC_PROG_CXX_CXX98 ([ACTION-IF-AVAILABLE], [ACTION-IF-UNAVAILABLE])
|
||||
# -------------------------------------------------------------------
|
||||
|
||||
# If the C++ compiler is not in ISO C++98 mode by default, try to add
|
||||
# an option to output variable CXX to make it so. This macro tries
|
||||
# various options that select ISO C++98 on some system or another. It
|
||||
# considers the compiler to be in ISO C++98 mode if it handles basic
|
||||
# features of the std namespace including: string, containers (list,
|
||||
# map, set, vector), streams (fstreams, iostreams, stringstreams,
|
||||
# iomanip), pair, exceptions and algorithms.
|
||||
|
||||
|
||||
AC_DEFUN([_AC_PROG_CXX_CXX98],
|
||||
[_AC_CXX_STD_TRY([cxx98],
|
||||
[_AC_CXX_CXX98_TEST_HEADER],
|
||||
[_AC_CXX_CXX98_TEST_BODY],
|
||||
dnl Try
|
||||
dnl GCC -std=gnu++98 (unused restrictive mode: -std=c++98)
|
||||
dnl IBM XL C -qlanglvl=extended
|
||||
dnl HP aC++ -AA
|
||||
dnl Intel ICC -std=gnu++98
|
||||
dnl Solaris N/A (default)
|
||||
dnl Tru64 N/A (default, but -std gnu could be used)
|
||||
dnl with extended modes being tried first.
|
||||
[[-std=gnu++98 -std=c++98 -qlanglvl=extended -AA]], [$1], [$2])[]dnl
|
||||
])# _AC_PROG_CXX_CXX98
|
||||
|
||||
# _AC_PROG_CXX_CXX11 ([ACTION-IF-AVAILABLE], [ACTION-IF-UNAVAILABLE])
|
||||
# -------------------------------------------------------------------
|
||||
# If the C++ compiler is not in ISO CXX11 mode by default, try to add
|
||||
# an option to output variable CXX to make it so. This macro tries
|
||||
# various options that select ISO C++11 on some system or another. It
|
||||
# considers the compiler to be in ISO C++11 mode if it handles all the
|
||||
# tests from the C++98 checks, plus the following: Language features
|
||||
# (auto, constexpr, decltype, default/deleted constructors, delegate
|
||||
# constructors, final, initialiser lists, lambda functions, nullptr,
|
||||
# override, range-based for loops, template brackets without spaces,
|
||||
# unicode literals) and library features (array, memory (shared_ptr,
|
||||
# weak_ptr), regex and tuple types).
|
||||
AC_DEFUN([_AC_PROG_CXX_CXX11],
|
||||
[_AC_CXX_STD_TRY([cxx11],
|
||||
[_AC_CXX_CXX11_TEST_HEADER
|
||||
_AC_CXX_CXX98_TEST_HEADER],
|
||||
[_AC_CXX_CXX11_TEST_BODY
|
||||
_AC_CXX_CXX98_TEST_BODY],
|
||||
dnl Try
|
||||
dnl GCC -std=gnu++11 (unused restrictive mode: -std=c++11) [and 0x variants]
|
||||
dnl IBM XL C -qlanglvl=extended0x
|
||||
dnl (pre-V12.1; unused restrictive mode: -qlanglvl=stdcxx11)
|
||||
dnl HP aC++ -AA
|
||||
dnl Intel ICC -std=c++11 -std=c++0x
|
||||
dnl Solaris N/A (no support)
|
||||
dnl Tru64 N/A (no support)
|
||||
dnl with extended modes being tried first.
|
||||
[[-std=gnu++11 -std=c++11 -std=gnu++0x -std=c++0x -qlanglvl=extended0x -AA]], [$1], [$2])[]dnl
|
||||
])# _AC_PROG_CXX_CXX11
|
||||
Loading…
Reference in New Issue
Block a user