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982530518f
This mostly just updates copyright dates of gnulib files. It also updates to the latest version of texinfo.tex.
59 lines
1.8 KiB
Plaintext
59 lines
1.8 KiB
Plaintext
dnl Reentrant time functions: localtime_r, gmtime_r.
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dnl Copyright (C) 2003, 2006-2016 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl Written by Paul Eggert.
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AC_DEFUN([gl_TIME_R],
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[
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dnl Persuade glibc and Solaris <time.h> to declare localtime_r.
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
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AC_REQUIRE([AC_C_RESTRICT])
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dnl Some systems don't declare localtime_r() and gmtime_r() if _REENTRANT is
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dnl not defined.
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AC_CHECK_DECLS([localtime_r], [], [], [[#include <time.h>]])
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if test $ac_cv_have_decl_localtime_r = no; then
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HAVE_DECL_LOCALTIME_R=0
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fi
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AC_CHECK_FUNCS_ONCE([localtime_r])
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if test $ac_cv_func_localtime_r = yes; then
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HAVE_LOCALTIME_R=1
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AC_CACHE_CHECK([whether localtime_r is compatible with its POSIX signature],
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[gl_cv_time_r_posix],
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[[#include <time.h>]],
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[[/* We don't need to append 'restrict's to the argument types,
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even though the POSIX signature has the 'restrict's,
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since C99 says they can't affect type compatibility. */
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struct tm * (*ptr) (time_t const *, struct tm *) = localtime_r;
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if (ptr) return 0;
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/* Check the return type is a pointer.
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On HP-UX 10 it is 'int'. */
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*localtime_r (0, 0);]])
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],
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[gl_cv_time_r_posix=yes],
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[gl_cv_time_r_posix=no])
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])
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if test $gl_cv_time_r_posix = yes; then
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REPLACE_LOCALTIME_R=0
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else
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REPLACE_LOCALTIME_R=1
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fi
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else
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HAVE_LOCALTIME_R=0
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fi
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])
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# Prerequisites of lib/time_r.c.
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AC_DEFUN([gl_PREREQ_TIME_R], [
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:
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])
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