diff options
Diffstat (limited to 'm4/getcwd.m4')
-rw-r--r-- | m4/getcwd.m4 | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/m4/getcwd.m4 b/m4/getcwd.m4 new file mode 100644 index 0000000..6ebe2fc --- /dev/null +++ b/m4/getcwd.m4 @@ -0,0 +1,64 @@ +# getcwd.m4 - check for working getcwd that is compatible with glibc + +# Copyright (C) 2001, 2003, 2004, 2005, 2006, 2007 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. + +AC_DEFUN([gl_FUNC_GETCWD_NULL], + [ + AC_CACHE_CHECK([whether getcwd (NULL, 0) allocates memory for result], + [gl_cv_func_getcwd_null], + [AC_TRY_RUN( + [ +# include <stdlib.h> +# include <unistd.h> +# ifndef getcwd + char *getcwd (); +# endif + int + main () + { + if (chdir ("/") != 0) + exit (1); + else + { + char *f = getcwd (NULL, 0); + exit (! (f && f[0] == '/' && !f[1])); + } + }], + [gl_cv_func_getcwd_null=yes], + [gl_cv_func_getcwd_null=no], + [gl_cv_func_getcwd_null=no])]) +]) + +AC_DEFUN([gl_FUNC_GETCWD], +[ + AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) + AC_REQUIRE([gl_FUNC_GETCWD_NULL]) + + gl_abort_bug=no + case $gl_cv_func_getcwd_null in + yes) + gl_FUNC_GETCWD_PATH_MAX + gl_FUNC_GETCWD_ABORT_BUG([gl_abort_bug=yes]);; + esac + + case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_path_max,$gl_abort_bug in + yes,yes,no) ;; + *) + REPLACE_GETCWD=1 + AC_LIBOBJ([getcwd]) + gl_PREREQ_GETCWD;; + esac +]) + +# Prerequisites of lib/getcwd.c. +AC_DEFUN([gl_PREREQ_GETCWD], +[ + AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + AC_REQUIRE([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO]) + : +]) |