diff options
Diffstat (limited to 'm4/getcwd.m4')
| -rw-r--r-- | m4/getcwd.m4 | 75 |
1 files changed, 51 insertions, 24 deletions
diff --git a/m4/getcwd.m4 b/m4/getcwd.m4 index d3bbe59..6f91bd9 100644 --- a/m4/getcwd.m4 +++ b/m4/getcwd.m4 @@ -1,20 +1,25 @@ # getcwd.m4 - check for working getcwd that is compatible with glibc -# Copyright (C) 2001, 2003-2007, 2009-2011 Free Software Foundation, Inc. +# Copyright (C) 2001, 2003-2007, 2009-2013 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 8 +# serial 12 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 <unistd.h> +# if HAVE_UNISTD_H +# include <unistd.h> +# else /* on Windows with MSVC */ +# include <direct.h> +# endif # ifndef getcwd char *getcwd (); # endif @@ -40,15 +45,14 @@ AC_DEFUN([gl_FUNC_GETCWD_NULL], ]])], [gl_cv_func_getcwd_null=yes], [gl_cv_func_getcwd_null=no], - [[ - case "$host_os" in - # Guess yes on glibc systems. - *-gnu*) gl_cv_func_getcwd_null="guessing yes";; - # Guess yes on Cygwin. - cygwin*) gl_cv_func_getcwd_null="guessing yes";; - # If we don't know, assume the worst. - *) gl_cv_func_getcwd_null="guessing no";; - esac + [[case "$host_os" in + # Guess yes on glibc systems. + *-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 ]])]) ]) @@ -103,20 +107,43 @@ AC_DEFUN([gl_FUNC_GETCWD], AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles gl_abort_bug=no - case $gl_cv_func_getcwd_null,$host_os in - *,mingw*) - gl_cv_func_getcwd_path_max=yes;; - yes,*) - gl_FUNC_GETCWD_PATH_MAX - gl_FUNC_GETCWD_ABORT_BUG([gl_abort_bug=yes]);; + 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 - - case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_posix_signature$gl_cv_func_getcwd_path_max,$gl_abort_bug in - *yes,yes,yes,no) ;; - *) - dnl Full replacement lib/getcwd.c, overrides LGPL replacement. - REPLACE_GETCWD=1;; + 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.]) + ;; + esac + + if { case "$gl_cv_func_getcwd_null" in *yes) false;; *) true;; esac; } \ + || test $gl_cv_func_getcwd_posix_signature != yes \ + || test "$gl_cv_func_getcwd_path_max" != yes \ + || test $gl_abort_bug = yes; then + REPLACE_GETCWD=1 + fi ]) # Prerequisites of lib/getcwd.c, when full replacement is in effect. |