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Diffstat (limited to 'gnulib-m4/setenv.m4')
-rw-r--r--gnulib-m4/setenv.m4127
1 files changed, 88 insertions, 39 deletions
diff --git a/gnulib-m4/setenv.m4 b/gnulib-m4/setenv.m4
index 58f6d13..3aa38d8 100644
--- a/gnulib-m4/setenv.m4
+++ b/gnulib-m4/setenv.m4
@@ -1,5 +1,5 @@
-# setenv.m4 serial 16
-dnl Copyright (C) 2001-2004, 2006-2010 Free Software Foundation, Inc.
+# setenv.m4 serial 26
+dnl Copyright (C) 2001-2004, 2006-2015 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.
@@ -7,16 +7,7 @@ dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_SETENV],
[
AC_REQUIRE([gl_FUNC_SETENV_SEPARATE])
- if test $HAVE_SETENV$REPLACE_SETENV != 10; then
- AC_LIBOBJ([setenv])
- fi
-])
-
-# Like gl_FUNC_SETENV, except prepare for separate compilation (no AC_LIBOBJ).
-AC_DEFUN([gl_FUNC_SETENV_SEPARATE],
-[
- AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
- AC_CHECK_FUNCS_ONCE([setenv])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
if test $ac_cv_func_setenv = no; then
HAVE_SETENV=0
else
@@ -27,69 +18,127 @@ AC_DEFUN([gl_FUNC_SETENV_SEPARATE],
#include <errno.h>
#include <string.h>
]], [[
- if (setenv ("", "", 0) != -1) return 1;
- if (errno != EINVAL) return 2;
- if (setenv ("a", "=", 1) != 0) return 3;
- if (strcmp (getenv ("a"), "=") != 0) return 4;
+ int result = 0;
+ {
+ if (setenv ("", "", 0) != -1)
+ result |= 1;
+ else if (errno != EINVAL)
+ result |= 2;
+ }
+ {
+ if (setenv ("a", "=", 1) != 0)
+ result |= 4;
+ else if (strcmp (getenv ("a"), "=") != 0)
+ result |= 8;
+ }
+ return result;
]])],
[gl_cv_func_setenv_works=yes], [gl_cv_func_setenv_works=no],
- [gl_cv_func_setenv_works="guessing no"])])
- if test "$gl_cv_func_setenv_works" != yes; then
- REPLACE_SETENV=1
- AC_LIBOBJ([setenv])
- fi
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_setenv_works="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_setenv_works="guessing no" ;;
+ esac
+ ])])
+ case "$gl_cv_func_setenv_works" in
+ *yes) ;;
+ *)
+ REPLACE_SETENV=1
+ ;;
+ esac
fi
+])
+
+# Like gl_FUNC_SETENV, except prepare for separate compilation
+# (no REPLACE_SETENV, no AC_LIBOBJ).
+AC_DEFUN([gl_FUNC_SETENV_SEPARATE],
+[
+ AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+ AC_CHECK_DECLS_ONCE([setenv])
+ if test $ac_cv_have_decl_setenv = no; then
+ HAVE_DECL_SETENV=0
+ fi
+ AC_CHECK_FUNCS_ONCE([setenv])
gl_PREREQ_SETENV
])
AC_DEFUN([gl_FUNC_UNSETENV],
[
AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CHECK_DECLS_ONCE([unsetenv])
+ if test $ac_cv_have_decl_unsetenv = no; then
+ HAVE_DECL_UNSETENV=0
+ fi
AC_CHECK_FUNCS([unsetenv])
if test $ac_cv_func_unsetenv = no; then
HAVE_UNSETENV=0
- AC_LIBOBJ([unsetenv])
- gl_PREREQ_UNSETENV
else
+ HAVE_UNSETENV=1
dnl Some BSDs return void, failing to do error checking.
AC_CACHE_CHECK([for unsetenv() return type], [gt_cv_func_unsetenv_ret],
- [AC_TRY_COMPILE([#include <stdlib.h>
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[
+#undef _BSD
+#define _BSD 1 /* unhide unsetenv declaration in OSF/1 5.1 <stdlib.h> */
+#include <stdlib.h>
extern
#ifdef __cplusplus
"C"
#endif
-#if defined(__STDC__) || defined(__cplusplus)
int unsetenv (const char *name);
-#else
-int unsetenv();
-#endif
-], , gt_cv_func_unsetenv_ret='int', gt_cv_func_unsetenv_ret='void')])
+ ]],
+ [[]])],
+ [gt_cv_func_unsetenv_ret='int'],
+ [gt_cv_func_unsetenv_ret='void'])])
if test $gt_cv_func_unsetenv_ret = 'void'; then
AC_DEFINE([VOID_UNSETENV], [1], [Define to 1 if unsetenv returns void
instead of int.])
REPLACE_UNSETENV=1
- AC_LIBOBJ([unsetenv])
fi
dnl Solaris 10 unsetenv does not remove all copies of a name.
- AC_CACHE_CHECK([whether unsetenv works on duplicates],
+ dnl Haiku alpha 2 unsetenv gets confused by assignment to environ.
+ dnl OpenBSD 4.7 unsetenv("") does not fail.
+ AC_CACHE_CHECK([whether unsetenv obeys POSIX],
[gl_cv_func_unsetenv_works],
[AC_RUN_IFELSE([AC_LANG_PROGRAM([[
#include <stdlib.h>
+ #include <errno.h>
+ extern char **environ;
]], [[
- char entry[] = "b=2";
+ char entry1[] = "a=1";
+ char entry2[] = "b=2";
+ char *env[] = { entry1, entry2, NULL };
if (putenv ((char *) "a=1")) return 1;
- if (putenv (entry)) return 2;
- entry[0] = 'a';
+ if (putenv (entry2)) return 2;
+ entry2[0] = 'a';
unsetenv ("a");
if (getenv ("a")) return 3;
+ if (!unsetenv ("") || errno != EINVAL) return 4;
+ entry2[0] = 'b';
+ environ = env;
+ if (!getenv ("a")) return 5;
+ entry2[0] = 'a';
+ unsetenv ("a");
+ if (getenv ("a")) return 6;
]])],
[gl_cv_func_unsetenv_works=yes], [gl_cv_func_unsetenv_works=no],
- [gl_cv_func_unsetenv_works="guessing no"])])
- if test "$gl_cv_func_unsetenv_works" != yes; then
- REPLACE_UNSETENV=1
- AC_LIBOBJ([unsetenv])
- fi
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_unsetenv_works="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_unsetenv_works="guessing no" ;;
+ esac
+ ])])
+ case "$gl_cv_func_unsetenv_works" in
+ *yes) ;;
+ *)
+ REPLACE_UNSETENV=1
+ ;;
+ esac
fi
])