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emacs/m4/getdelim.m4
Po Lu 8ca4162ecd Update from gnulib
* admin/merge-gnulib (GNULIB_MODULES):
* cross/lib/getopt-pfx-core.h (optind):
* cross/lib/limits.in.h (BOOL_WIDTH):
* cross/lib/math.in.h:
* cross/lib/stpncpy.c (__stpncpy):
* cross/lib/string.in.h:
* lib/getopt-pfx-core.h (optind):
* lib/gnulib.mk.in (ANDROID_MIN_SDK):
(GL_COND_OBJ_STDIO_READ_CONDITION):
(LIBS):
(NDK_BUILD_AR):
(REPLACE__EXIT):
(libgnu_a_SOURCES):
* lib/limits.in.h (BOOL_WIDTH):
* lib/math.in.h:
* lib/stpncpy.c (__stpncpy):
* lib/string.in.h:
* m4/assert_h.m4 (gl_ASSERT_H):
* m4/fdopendir.m4 (gl_FUNC_FDOPENDIR):
* m4/getdelim.m4 (gl_FUNC_GETDELIM):
* m4/getline.m4 (gl_FUNC_GETLINE):
* m4/gnulib-common.m4 (gl_COMMON_BODY):
(gl_CONDITIONAL_HEADER):
(gl_CHECK_FUNCS_ANDROID):
* m4/gnulib-comp.m4 (gl_EARLY):
(gl_INIT):
(gl_FILE_LIST):
* m4/limits-h.m4:
* m4/lstat.m4 (gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK):
* m4/malloc.m4 (_AC_FUNC_MALLOC_IF):
* m4/printf.m4 (gl_PRINTF_SIZES_C99):
(gl_PRINTF_INFINITE):
(gl_PRINTF_INFINITE_LONG_DOUBLE):
(gl_PRINTF_DIRECTIVE_A):
(gl_PRINTF_DIRECTIVE_F):
(gl_PRINTF_FLAG_ZERO):
(gl_SNPRINTF_PRESENCE):
(gl_SNPRINTF_DIRECTIVE_N):
(gl_VSNPRINTF_ZEROSIZE_C99):
* m4/pselect.m4 (gl_FUNC_PSELECT):
* m4/readlink.m4 (gl_FUNC_READLINK):
* m4/realloc.m4 (_AC_FUNC_REALLOC_IF):
* m4/signbit.m4 (gl_SIGNBIT):
* m4/stpncpy.m4 (gl_FUNC_STPNCPY):
* m4/symlink.m4 (gl_FUNC_SYMLINK): Add gnulib module stpncpy.
* src/android.c: Include string.h.
2023-02-21 16:29:57 +08:00

115 lines
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# getdelim.m4 serial 19
dnl Copyright (C) 2005-2007, 2009-2023 Free Software Foundation, Inc.
dnl
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_PREREQ([2.59])
AC_DEFUN([gl_FUNC_GETDELIM],
[
AC_REQUIRE([gl_STDIO_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST])
dnl Persuade glibc <stdio.h> to declare getdelim().
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
AC_CHECK_DECLS_ONCE([getdelim])
gl_CHECK_FUNCS_ANDROID([getdelim], [[#include <stdio.h>]])
if test $ac_cv_func_getdelim = yes; then
HAVE_GETDELIM=1
dnl Found it in some library. Verify that it works.
AC_CACHE_CHECK([for working getdelim function],
[gl_cv_func_working_getdelim],
[case "$host_os" in
darwin*)
dnl On macOS 10.13, valgrind detected an out-of-bounds read during
dnl the GNU sed test suite:
dnl Invalid read of size 16
dnl at 0x100EE6A05: _platform_memchr$VARIANT$Base (in /usr/lib/system/libsystem_platform.dylib)
dnl by 0x100B7B0BD: getdelim (in /usr/lib/system/libsystem_c.dylib)
dnl by 0x10000B0BE: ck_getdelim (utils.c:254)
gl_cv_func_working_getdelim=no ;;
*)
echo fooNbarN | tr -d '\012' | tr N '\012' > conftest.data
AC_RUN_IFELSE([AC_LANG_SOURCE([[
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
int main ()
{
FILE *in = fopen ("./conftest.data", "r");
if (!in)
return 1;
{
/* Test result for a NULL buffer and a zero size.
Based on a test program from Karl Heuer. */
char *line = NULL;
size_t siz = 0;
int len = getdelim (&line, &siz, '\n', in);
if (!(len == 4 && line && strcmp (line, "foo\n") == 0))
{ free (line); fclose (in); return 2; }
free (line);
}
{
/* Test result for a NULL buffer and a non-zero size.
This crashes on FreeBSD 8.0. */
char *line = NULL;
size_t siz = (size_t)(~0) / 4;
if (getdelim (&line, &siz, '\n', in) == -1)
{ fclose (in); return 3; }
free (line);
}
fclose (in);
return 0;
}
]])],
[gl_cv_func_working_getdelim=yes],
[gl_cv_func_working_getdelim=no],
[dnl We're cross compiling.
dnl Guess it works on glibc2 systems and musl systems.
AC_EGREP_CPP([Lucky GNU user],
[
#include <features.h>
#ifdef __GNU_LIBRARY__
#if (__GLIBC__ >= 2) && !defined __UCLIBC__
Lucky GNU user
#endif
#endif
],
[gl_cv_func_working_getdelim="guessing yes"],
[case "$host_os" in
*-musl* | midipix*) gl_cv_func_working_getdelim="guessing yes" ;;
*) gl_cv_func_working_getdelim="$gl_cross_guess_normal" ;;
esac
])
])
;;
esac
])
case "$gl_cv_func_working_getdelim" in
*yes) ;;
*) REPLACE_GETDELIM=1 ;;
esac
else
HAVE_GETDELIM=0
case "$gl_cv_onwards_func_getdelim" in
future*) REPLACE_GETDELIM=1 ;;
esac
fi
if test $ac_cv_have_decl_getdelim = no; then
HAVE_DECL_GETDELIM=0
fi
])
# Prerequisites of lib/getdelim.c.
AC_DEFUN([gl_PREREQ_GETDELIM],
[
AC_CHECK_FUNCS([flockfile funlockfile])
AC_CHECK_DECLS([getc_unlocked])
])