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44 lines
1.4 KiB
Plaintext
44 lines
1.4 KiB
Plaintext
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dnl Reentrant time functions like localtime_r.
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dnl Copyright (C) 2003, 2006, 2007, 2008 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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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_TRY_COMPILE(
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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. On HP-UX 10 it is 'int'. */
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*localtime_r (0, 0);],
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[gl_cv_time_r_posix=yes],
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[gl_cv_time_r_posix=no])])
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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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AC_LIBOBJ([time_r])
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gl_PREREQ_TIME_R
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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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