Mercurial > gnulib
view m4/getcwd.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 |
line wrap: on
line source
# getcwd.m4 - check for working getcwd that is compatible with glibc # Copyright (C) 2001, 2003-2007, 2009-2019 Free Software Foundation, Inc. # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # Written by Paul Eggert. # serial 16 AC_DEFUN([gl_FUNC_GETCWD_NULL], [ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CHECK_HEADERS_ONCE([unistd.h]) AC_CACHE_CHECK([whether getcwd (NULL, 0) allocates memory for result], [gl_cv_func_getcwd_null], [AC_RUN_IFELSE([AC_LANG_PROGRAM([[ # include <stdlib.h> # if HAVE_UNISTD_H # include <unistd.h> # else /* on Windows with MSVC */ # include <direct.h> # endif # ifndef getcwd char *getcwd (); # endif ]], [[ #if defined _WIN32 && ! defined __CYGWIN__ /* mingw cwd does not start with '/', but getcwd does allocate. However, mingw fails to honor non-zero size. */ #else if (chdir ("/") != 0) return 1; else { char *f = getcwd (NULL, 0); if (! f) return 2; if (f[0] != '/') { free (f); return 3; } if (f[1] != '\0') { free (f); return 4; } free (f); return 0; } #endif ]])], [gl_cv_func_getcwd_null=yes], [gl_cv_func_getcwd_null=no], [[case "$host_os" in # Guess yes on glibc systems. *-gnu* | gnu*) gl_cv_func_getcwd_null="guessing yes";; # Guess yes on Cygwin. cygwin*) gl_cv_func_getcwd_null="guessing yes";; # If we don't know, assume the worst. *) gl_cv_func_getcwd_null="guessing no";; esac ]])]) ]) AC_DEFUN([gl_FUNC_GETCWD_SIGNATURE], [ AC_CACHE_CHECK([for getcwd with POSIX signature], [gl_cv_func_getcwd_posix_signature], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[#include <unistd.h>]], [[extern #ifdef __cplusplus "C" #endif char *getcwd (char *, size_t); ]]) ], [gl_cv_func_getcwd_posix_signature=yes], [gl_cv_func_getcwd_posix_signature=no]) ]) ]) dnl Guarantee that getcwd will malloc with a NULL first argument. Assumes dnl that either the system getcwd is robust, or that calling code is okay dnl with spurious failures when run from a directory with an absolute name dnl larger than 4k bytes. dnl dnl Assumes that getcwd exists; if you are worried about obsolete dnl platforms that lacked getcwd(), then you need to use the GPL module. AC_DEFUN([gl_FUNC_GETCWD_LGPL], [ AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) AC_REQUIRE([gl_FUNC_GETCWD_NULL]) AC_REQUIRE([gl_FUNC_GETCWD_SIGNATURE]) case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_posix_signature in *yes,yes) ;; *) dnl Minimal replacement lib/getcwd-lgpl.c. REPLACE_GETCWD=1 ;; esac ]) dnl Check for all known getcwd bugs; useful for a program likely to be dnl executed from an arbitrary location. AC_DEFUN([gl_FUNC_GETCWD], [ AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) AC_REQUIRE([gl_FUNC_GETCWD_NULL]) AC_REQUIRE([gl_FUNC_GETCWD_SIGNATURE]) AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles gl_abort_bug=no case "$host_os" in mingw*) gl_cv_func_getcwd_path_max=yes ;; *) gl_FUNC_GETCWD_PATH_MAX case "$gl_cv_func_getcwd_null" in *yes) gl_FUNC_GETCWD_ABORT_BUG([gl_abort_bug=yes]) ;; esac ;; esac dnl Define HAVE_MINIMALLY_WORKING_GETCWD and HAVE_PARTLY_WORKING_GETCWD dnl if appropriate. case "$gl_cv_func_getcwd_path_max" in "no"|"no, it has the AIX bug") ;; *) AC_DEFINE([HAVE_MINIMALLY_WORKING_GETCWD], [1], [Define to 1 if getcwd minimally works, that is, its result can be trusted when it succeeds.]) ;; esac case "$gl_cv_func_getcwd_path_max" in "no, but it is partly working") AC_DEFINE([HAVE_PARTLY_WORKING_GETCWD], [1], [Define to 1 if getcwd works, except it sometimes fails when it shouldn't, setting errno to ERANGE, ENAMETOOLONG, or ENOENT.]) ;; "yes, but with shorter paths") AC_DEFINE([HAVE_GETCWD_SHORTER], [1], [Define to 1 if getcwd works, but with shorter paths than is generally tested with the replacement.]) ;; esac if { case "$gl_cv_func_getcwd_null" in *yes) false;; *) true;; esac; } \ || test $gl_cv_func_getcwd_posix_signature != yes \ || { case "$gl_cv_func_getcwd_path_max" in *yes*) false;; *) true;; esac; } \ || test $gl_abort_bug = yes; then REPLACE_GETCWD=1 fi ]) # Prerequisites of lib/getcwd.c, when full replacement is in effect. AC_DEFUN([gl_PREREQ_GETCWD], [ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) AC_REQUIRE([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO]) : ])