Mercurial > gnulib
view m4/readlink.m4 @ 40177:dcd889592b62
dtoastr,ftoastr,ldtoastr: port to c-strtod changes
Decouple these modules from c-strtod. Nowadays it’s reasonable to
assume the C99 signatures for strtod and strtold. Programs that
require stricter adherence to C99 should also use the strtod and
strtold modules as needed, and we no longer need the
HAVE_C99_STRTOLD macro.
* NEWS: Mention this.
* lib/ftoastr.c (STRTOF) [LENGTH == 3]: Assume strtold.
* m4/c-strtod.m4 (gl_C_STRTOLD): Do not define HAVE_C99_STRTOLD.
* modules/dtoastr, modules/ftoastr, modules/ldtoastr:
(Files): Remove m4/c-strtod.m4.
(configure.ac): Do not require gl_C99_STRTOLD, which no longer
exists.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Sat, 02 Feb 2019 13:01:55 -0800 |
parents | b06060465f09 |
children |
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# readlink.m4 serial 14 dnl Copyright (C) 2003, 2007, 2009-2019 Free Software Foundation, Inc. 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_DEFUN([gl_FUNC_READLINK], [ AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CHECK_FUNCS_ONCE([readlink]) if test $ac_cv_func_readlink = no; then HAVE_READLINK=0 else AC_CACHE_CHECK([whether readlink signature is correct], [gl_cv_decl_readlink_works], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[#include <unistd.h> /* Cause compilation failure if original declaration has wrong type. */ ssize_t readlink (const char *, char *, size_t);]])], [gl_cv_decl_readlink_works=yes], [gl_cv_decl_readlink_works=no])]) dnl Solaris 9 ignores trailing slash. dnl FreeBSD 7.2 dereferences only one level of links with trailing slash. AC_CACHE_CHECK([whether readlink handles trailing slash correctly], [gl_cv_func_readlink_works], [# We have readlink, so assume ln -s works. ln -s conftest.no-such conftest.link ln -s conftest.link conftest.lnk2 AC_RUN_IFELSE( [AC_LANG_PROGRAM( [[#include <unistd.h> ]], [[char buf[20]; return readlink ("conftest.lnk2/", buf, sizeof buf) != -1;]])], [gl_cv_func_readlink_works=yes], [gl_cv_func_readlink_works=no], [case "$host_os" in # Guess yes on Linux systems. linux-* | linux) gl_cv_func_readlink_works="guessing yes" ;; # Guess yes on glibc systems. *-gnu* | gnu*) gl_cv_func_readlink_works="guessing yes" ;; # If we don't know, assume the worst. *) gl_cv_func_readlink_works="guessing no" ;; esac ]) rm -f conftest.link conftest.lnk2]) case "$gl_cv_func_readlink_works" in *yes) if test "$gl_cv_decl_readlink_works" != yes; then REPLACE_READLINK=1 fi ;; *) AC_DEFINE([READLINK_TRAILING_SLASH_BUG], [1], [Define to 1 if readlink fails to recognize a trailing slash.]) REPLACE_READLINK=1 ;; esac fi ]) # Like gl_FUNC_READLINK, except prepare for separate compilation # (no REPLACE_READLINK, no AC_LIBOBJ). AC_DEFUN([gl_FUNC_READLINK_SEPARATE], [ AC_CHECK_FUNCS_ONCE([readlink]) gl_PREREQ_READLINK ]) # Prerequisites of lib/readlink.c. AC_DEFUN([gl_PREREQ_READLINK], [ : ])