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annotate m4/fopen.m4 @ 40231:9b3c79fdfe0b

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strtod: fix clash with strtold Problem reported for RHEL 5 by Jesse Caldwell (Bug#34817). * lib/strtod.c (compute_minus_zero, minus_zero): Simplify by remving the macro / external variable, and having just a function. User changed. This avoids the need for an external variable that might clash.
author Paul Eggert <eggert@cs.ucla.edu>
date Mon, 11 Mar 2019 16:40:29 -0700
parents b06060465f09
children
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1 # fopen.m4 serial 10
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2 dnl Copyright (C) 2007-2019 Free Software Foundation, Inc.
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3 dnl This file is free software; the Free Software Foundation
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4 dnl gives unlimited permission to copy and/or distribute it,
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5 dnl with or without modifications, as long as this notice is preserved.
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6
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7 AC_DEFUN([gl_FUNC_FOPEN],
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8 [
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9 AC_REQUIRE([gl_STDIO_H_DEFAULTS])
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10 AC_REQUIRE([AC_CANONICAL_HOST])
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11 case "$host_os" in
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12 mingw* | pw*)
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13 dnl Replace fopen, for handling of "/dev/null".
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14 REPLACE_FOPEN=1
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15 dnl fopen on mingw also has the trailing slash bug.
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16 gl_cv_func_fopen_slash="guessing no"
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17 ;;
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18 *)
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19 dnl fopen("foo/", "w") should not create a file when the file name has a
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20 dnl trailing slash.
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21 AC_CACHE_CHECK([whether fopen recognizes a trailing slash],
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22 [gl_cv_func_fopen_slash],
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23 [
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24 AC_RUN_IFELSE(
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25 [AC_LANG_SOURCE([[
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26 #include <stddef.h>
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27 #include <stdio.h>
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28 int main ()
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29 {
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30 FILE *fp = fopen ("conftest.sl/", "w");
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31 int result = (fp != NULL);
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32 if (fp != NULL)
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33 fclose (fp);
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34 return result;
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35 }]])],
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36 [gl_cv_func_fopen_slash=yes],
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37 [gl_cv_func_fopen_slash=no],
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38 [
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39 changequote(,)dnl
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40 case "$host_os" in
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41 aix* | hpux* | solaris2.[0-9] | solaris2.[0-9].*)
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42 gl_cv_func_fopen_slash="guessing no" ;;
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43 *)
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44 gl_cv_func_fopen_slash="guessing yes" ;;
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45 esac
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46 changequote([,])dnl
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47 ])
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48 rm -f conftest.sl
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49 ])
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50 ;;
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51 esac
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52 case "$gl_cv_func_fopen_slash" in
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53 *no)
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54 AC_DEFINE([FOPEN_TRAILING_SLASH_BUG], [1],
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55 [Define to 1 if fopen() fails to recognize a trailing slash.])
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56 REPLACE_FOPEN=1
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57 ;;
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58 esac
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59 ])
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60
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61 # Prerequisites of lib/fopen.c.
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62 AC_DEFUN([gl_PREREQ_FOPEN], [:])