version 1.1.1.1, 2012/02/21 22:57:49
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version 1.1.1.2, 2012/05/29 09:29:44
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# setenv.m4 serial 11 | # setenv.m4 serial 24 |
dnl Copyright (C) 2001-2004, 2006-2009 Free Software Foundation, Inc. | dnl Copyright (C) 2001-2004, 2006-2011 Free Software Foundation, Inc. |
dnl This file is free software; the Free Software Foundation |
dnl This file is free software; the Free Software Foundation |
dnl gives unlimited permission to copy and/or distribute it, |
dnl gives unlimited permission to copy and/or distribute it, |
dnl with or without modifications, as long as this notice is preserved. |
dnl with or without modifications, as long as this notice is preserved. |
|
|
AC_DEFUN([gl_FUNC_SETENV], |
AC_DEFUN([gl_FUNC_SETENV], |
[ |
[ |
AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) | AC_REQUIRE([gl_FUNC_SETENV_SEPARATE]) |
AC_CHECK_FUNCS_ONCE([setenv]) | |
if test $ac_cv_func_setenv = no; then |
if test $ac_cv_func_setenv = no; then |
HAVE_SETENV=0 |
HAVE_SETENV=0 |
AC_LIBOBJ([setenv]) | else |
gl_PREREQ_SETENV | AC_CACHE_CHECK([whether setenv validates arguments], |
| [gl_cv_func_setenv_works], |
| [AC_RUN_IFELSE([AC_LANG_PROGRAM([[ |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <string.h> |
| ]], [[ |
| int result = 0; |
| { |
| if (setenv ("", "", 0) != -1) |
| result |= 1; |
| else if (errno != EINVAL) |
| result |= 2; |
| } |
| { |
| if (setenv ("a", "=", 1) != 0) |
| result |= 4; |
| else if (strcmp (getenv ("a"), "=") != 0) |
| result |= 8; |
| } |
| return result; |
| ]])], |
| [gl_cv_func_setenv_works=yes], [gl_cv_func_setenv_works=no], |
| [gl_cv_func_setenv_works="guessing no"])]) |
| if test "$gl_cv_func_setenv_works" != yes; then |
| REPLACE_SETENV=1 |
| fi |
fi |
fi |
]) |
]) |
|
|
# Like gl_FUNC_SETENV, except prepare for separate compilation (no AC_LIBOBJ). | # Like gl_FUNC_SETENV, except prepare for separate compilation |
| # (no REPLACE_SETENV, no AC_LIBOBJ). |
AC_DEFUN([gl_FUNC_SETENV_SEPARATE], |
AC_DEFUN([gl_FUNC_SETENV_SEPARATE], |
[ |
[ |
AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) |
AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) |
AC_CHECK_FUNCS_ONCE([setenv]) | AC_CHECK_DECLS_ONCE([setenv]) |
if test $ac_cv_func_setenv = no; then | if test $ac_cv_have_decl_setenv = no; then |
HAVE_SETENV=0 | HAVE_DECL_SETENV=0 |
fi |
fi |
|
AC_CHECK_FUNCS_ONCE([setenv]) |
gl_PREREQ_SETENV |
gl_PREREQ_SETENV |
]) |
]) |
|
|
AC_DEFUN([gl_FUNC_UNSETENV], |
AC_DEFUN([gl_FUNC_UNSETENV], |
[ |
[ |
AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) |
AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) |
|
AC_CHECK_DECLS_ONCE([unsetenv]) |
|
if test $ac_cv_have_decl_unsetenv = no; then |
|
HAVE_DECL_UNSETENV=0 |
|
fi |
AC_CHECK_FUNCS([unsetenv]) |
AC_CHECK_FUNCS([unsetenv]) |
if test $ac_cv_func_unsetenv = no; then |
if test $ac_cv_func_unsetenv = no; then |
HAVE_UNSETENV=0 |
HAVE_UNSETENV=0 |
AC_LIBOBJ([unsetenv]) |
|
gl_PREREQ_UNSETENV |
|
else |
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_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 |
extern |
#ifdef __cplusplus |
#ifdef __cplusplus |
"C" |
"C" |
Line 46 int unsetenv (const char *name);
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Line 82 int unsetenv (const char *name);
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#else |
#else |
int unsetenv(); |
int unsetenv(); |
#endif |
#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 |
if test $gt_cv_func_unsetenv_ret = 'void'; then |
VOID_UNSETENV=1 | AC_DEFINE([VOID_UNSETENV], [1], [Define to 1 if unsetenv returns void |
| instead of int.]) |
| REPLACE_UNSETENV=1 |
| fi |
| |
| dnl Solaris 10 unsetenv does not remove all copies of a name. |
| dnl Haiku alpha 2 unsetenv gets confused by assignment to environ. |
| dnl OpenBSD 4.7 unsetenv("") does not fail. |
| AC_CACHE_CHECK([whether unsetenv obeys POSIX], |
| [gl_cv_func_unsetenv_works], |
| [AC_RUN_IFELSE([AC_LANG_PROGRAM([[ |
| #include <stdlib.h> |
| #include <errno.h> |
| extern char **environ; |
| ]], [[ |
| char entry1[] = "a=1"; |
| char entry2[] = "b=2"; |
| char *env[] = { entry1, entry2, NULL }; |
| if (putenv ((char *) "a=1")) return 1; |
| if (putenv (entry2)) return 2; |
| entry2[0] = 'a'; |
| unsetenv ("a"); |
| if (getenv ("a")) return 3; |
| if (!unsetenv ("") || errno != EINVAL) return 4; |
| entry2[0] = 'b'; |
| environ = env; |
| if (!getenv ("a")) return 5; |
| entry2[0] = 'a'; |
| unsetenv ("a"); |
| if (getenv ("a")) return 6; |
| ]])], |
| [gl_cv_func_unsetenv_works=yes], [gl_cv_func_unsetenv_works=no], |
| [gl_cv_func_unsetenv_works="guessing no"])]) |
| if test "$gl_cv_func_unsetenv_works" != yes; then |
| REPLACE_UNSETENV=1 |
fi |
fi |
fi |
fi |
]) |
]) |