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annotate m4/c-strtod.m4 @ 9209:5a0294ce5372

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Track CVS Autoconf on AC_USE_SYSTEM_EXTENSIONS. * m4/extensions.m4 (AC_USE_SYSTEM_EXTENSIONS): Update to CVS Autoconf definition. * modules/euidaccess (Depends-on): Add extensions, for AC_USE_SYSTEM_EXTENSIONS with autoconf <= 2.59. * modules/fnmatch (Depends-on): Likewise. * modules/getaddrinfo (Depends-on): Likewise. * modules/getdelim (Depends-on): Likewise. * modules/getline (Depends-on): Likewise. * modules/getsubopt (Depends-on): Likewise. * modules/gettext (Depends-on): Likewise. * modules/group-member (Depends-on): Likewise. * modules/mbchar (Depends-on): Likewise. * modules/memmem (Depends-on): Likewise. * modules/mempcpy (Depends-on): Likewise. * modules/memrchr (Depends-on): Likewise. * modules/pagealign_alloc (Depends-on): Likewise. * modules/readutmp (Depends-on): Likewise. * modules/stpcpy (Depends-on): Likewise. * modules/stpncpy (Depends-on): Likewise. * modules/strchrnul (Depends-on): Likewise. * modules/strndup (Depends-on): Likewise. * modules/strsep (Depends-on): Likewise. * modules/strverscmp (Depends-on): Likewise. * modules/vasprintf (Depends-on): Likewise. * modules/wcwidth (Depends-on): Likewise. * m4/euidaccess.m4 (gl_FUNC_EUIDACCESS): AC_GNU_SOURCE will be obsolete in Autoconf 2.62; use AC_USE_SYSTEM_EXTENSIONS instead. * m4/fnmatch.m4 (gl_FUNC_FNMATCH_GNU): Likewise. * m4/getaddrinfo.m4 (gl_PREREQ_GETADDR_INFO): Likewise. * m4/getdelim.m4 (gl_FUNC_GETDELIM): Likewise. * m4/getline.m4 (gl_FUNC_GETLINE): Likewise. * m4/getsubopt.m4 (gl_FUNC_GETSUBOPT): Likewise. * m4/glob.m4 (gl_PREREQ_GLOB): Likewise. * m4/group-member.m4 (gl_FUNC_GROUP_MEMBER): Likewise. * m4/mbchar.m4 (gl_MBCHAR): Likewise. * m4/memmem.m4 (gl_FUNC_MEMMEM): Likewise. * m4/mempcpy.m4 (gl_FUNC_MEMPCPY): Likewise. * m4/memrchr.m4 (gl_FUNC_MEMRCHR): Likewise. * m4/mmap-anon.m4 (gl_FUNC_MMAP_ANON): Likewise. * m4/pagealign_alloc.m4 (gl_PAGEALIGN_ALLOC): Likewise. * m4/readutmp.m4 (gl_READUTMP): Likewise. * m4/regex.m4 (gl_PREREQ_REGEX): Likewise. * m4/stpcpy.m4 (gl_FUNC_STPCPY): Likewise. * m4/stpncpy.m4 (gl_FUNC_STPNCPY): Likewise. * m4/strchrnul.m4 (gl_FUNC_STRCHRNUL): Likewise. * m4/strndup.m4 (gl_FUNC_STRNDUP): Likewise. * m4/strnlen.m4 (gl_FUNC_STRNLEN): Likewise. * m4/strsep.m4 (gl_FUNC_STRSEP): Likewise. * m4/strverscmp.m4 (gl_FUNC_STRVERSCMP): Likewise. * m4/vasprintf.m4 (gl_PREREQ_VASPRINTF_H): Likewise. * m4/wcwidth.m4 (gl_FUNC_WCWIDTH): Likewise. * m4/lock.m4 (gl_LOCK_EARLY_BODY): Likewise, but provide fallback, so that lock.m4 can be used in gettext without extensions module.
author Eric Blake <ebb9@byu.net>
date Wed, 12 Sep 2007 15:59:57 +0000
parents be9e01d008cb
children f6cba5a556ce
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1 # c-strtod.m4 serial 9
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3 # Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
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4 # This file is free software; the Free Software Foundation
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5 # gives unlimited permission to copy and/or distribute it,
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6 # with or without modifications, as long as this notice is preserved.
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7
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8 # Written by Paul Eggert.
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9
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10 AC_DEFUN([gl_C99_STRTOLD],
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11 [
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12 AC_CACHE_CHECK([whether strtold conforms to C99],
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13 [gl_cv_func_c99_strtold],
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14 [AC_LINK_IFELSE(
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15 [AC_LANG_PROGRAM(
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16 [[/* On HP-UX before 11.23, strtold returns a struct instead of
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17 long double. Reject implementations like that, by requiring
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18 compatibility with the C99 prototype. */
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19 #include <stdlib.h>
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20 static long double (*p) (char const *, char **) = strtold;
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21 static long double
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22 test (char const *nptr, char **endptr)
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23 {
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24 long double r;
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25 r = strtold (nptr, endptr);
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26 return r;
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27 }]],
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28 [[return test ("1.0", NULL) != 1 || p ("1.0", NULL) != 1;]])],
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29 [gl_cv_func_c99_strtold=yes],
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30 [gl_cv_func_c99_strtold=no])])
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31 if test $gl_cv_func_c99_strtold = yes; then
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32 AC_DEFINE([HAVE_C99_STRTOLD], 1, [Define to 1 if strtold conforms to C99.])
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33 fi
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34 ])
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35
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36 AC_DEFUN([gl_C_STRTOD],
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37 [
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38 AC_LIBOBJ([c-strtod])
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39
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40 dnl Prerequisites of lib/c-strtod.c.
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41 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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42 :
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43 ])
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44
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45 AC_DEFUN([gl_C_STRTOLD],
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46 [
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47 AC_LIBOBJ([c-strtold])
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48
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49 dnl Prerequisites of lib/c-strtold.c.
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50 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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51 AC_REQUIRE([gl_C99_STRTOLD])
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52 :
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53 ])