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version 1.1.1.1, 2012/02/21 22:57:49
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version 1.1.1.3, 2021/03/17 13:38:46
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| # setenv.m4 serial 11 | # setenv.m4 serial 28 |
| dnl Copyright (C) 2001-2004, 2006-2009 Free Software Foundation, Inc. | dnl Copyright (C) 2001-2004, 2006-2019 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]) | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| if test $ac_cv_func_setenv = no; then |
if test $ac_cv_func_setenv = no; then |
| HAVE_SETENV=0 |
HAVE_SETENV=0 |
| AC_LIBOBJ([setenv]) | else |
| gl_PREREQ_SETENV | AC_CACHE_CHECK([whether setenv validates arguments], |
| | [gl_cv_func_setenv_works], |
| | [AC_RUN_IFELSE([AC_LANG_PROGRAM([[ |
| | #include <stdlib.h> |
| | #include <errno.h> |
| | #include <string.h> |
| | ]], [[ |
| | int result = 0; |
| | { |
| | if (setenv ("", "", 0) != -1) |
| | result |= 1; |
| | else if (errno != EINVAL) |
| | result |= 2; |
| | } |
| | { |
| | if (setenv ("a", "=", 1) != 0) |
| | result |= 4; |
| | else if (strcmp (getenv ("a"), "=") != 0) |
| | result |= 8; |
| | } |
| | return result; |
| | ]])], |
| | [gl_cv_func_setenv_works=yes], [gl_cv_func_setenv_works=no], |
| | [case "$host_os" in |
| | # Guess yes on glibc systems. |
| | *-gnu* | gnu*) gl_cv_func_setenv_works="guessing yes" ;; |
| | # Guess yes on musl systems. |
| | *-musl*) 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 |
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_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]) |
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" |
| #endif |
#endif |
| #if defined(__STDC__) || defined(__cplusplus) |
|
| int unsetenv (const char *name); |
int unsetenv (const char *name); |
| #else | ]], |
| int unsetenv(); | [[]])], |
| #endif | [gt_cv_func_unsetenv_ret='int'], |
| ], , gt_cv_func_unsetenv_ret='int', gt_cv_func_unsetenv_ret='void')]) | [gt_cv_func_unsetenv_ret='void'])]) |
| if test $gt_cv_func_unsetenv_ret = 'void'; then |
if test $gt_cv_func_unsetenv_ret = 'void'; then |
| VOID_UNSETENV=1 | AC_DEFINE([VOID_UNSETENV], [1], [Define to 1 if unsetenv returns void |
| | instead of int.]) |
| | REPLACE_UNSETENV=1 |
| fi |
fi |
| |
|
| |
dnl Solaris 10 unsetenv does not remove all copies of a name. |
| |
dnl Haiku alpha 2 unsetenv gets confused by assignment to environ. |
| |
dnl OpenBSD 4.7 unsetenv("") does not fail. |
| |
AC_CACHE_CHECK([whether unsetenv obeys POSIX], |
| |
[gl_cv_func_unsetenv_works], |
| |
[AC_RUN_IFELSE([AC_LANG_PROGRAM([[ |
| |
#include <stdlib.h> |
| |
#include <errno.h> |
| |
extern char **environ; |
| |
]], [[ |
| |
char entry1[] = "a=1"; |
| |
char entry2[] = "b=2"; |
| |
char *env[] = { entry1, entry2, NULL }; |
| |
if (putenv ((char *) "a=1")) return 1; |
| |
if (putenv (entry2)) return 2; |
| |
entry2[0] = 'a'; |
| |
unsetenv ("a"); |
| |
if (getenv ("a")) return 3; |
| |
if (!unsetenv ("") || errno != EINVAL) return 4; |
| |
entry2[0] = 'b'; |
| |
environ = env; |
| |
if (!getenv ("a")) return 5; |
| |
entry2[0] = 'a'; |
| |
unsetenv ("a"); |
| |
if (getenv ("a")) return 6; |
| |
]])], |
| |
[gl_cv_func_unsetenv_works=yes], [gl_cv_func_unsetenv_works=no], |
| |
[case "$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 |
fi |
| ]) |
]) |
| |
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