mirror of
git://git.gnupg.org/gnupg.git
synced 2024-11-04 20:38:50 +01:00
69 lines
1.9 KiB
Plaintext
69 lines
1.9 KiB
Plaintext
# setenv.m4 serial 6
|
|
dnl Copyright (C) 2001-2004, 2006 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.
|
|
|
|
AC_DEFUN([gt_FUNC_SETENV],
|
|
[
|
|
AC_REPLACE_FUNCS(setenv unsetenv)
|
|
if test $ac_cv_func_setenv = no; then
|
|
gl_PREREQ_SETENV
|
|
fi
|
|
if test $ac_cv_func_unsetenv = no; then
|
|
gl_PREREQ_UNSETENV
|
|
else
|
|
AC_CACHE_CHECK([for unsetenv() return type], gt_cv_func_unsetenv_ret,
|
|
[AC_TRY_COMPILE([#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')])
|
|
if test $gt_cv_func_unsetenv_ret = 'void'; then
|
|
AC_DEFINE(VOID_UNSETENV, 1, [Define if unsetenv() returns void, not int.])
|
|
fi
|
|
fi
|
|
])
|
|
|
|
# Check if a variable is properly declared.
|
|
# gt_CHECK_VAR_DECL(includes,variable)
|
|
AC_DEFUN([gt_CHECK_VAR_DECL],
|
|
[
|
|
define([gt_cv_var], [gt_cv_var_]$2[_declaration])
|
|
AC_MSG_CHECKING([if $2 is properly declared])
|
|
AC_CACHE_VAL(gt_cv_var, [
|
|
AC_TRY_COMPILE([$1
|
|
extern struct { int foo; } $2;],
|
|
[$2.foo = 1;],
|
|
gt_cv_var=no,
|
|
gt_cv_var=yes)])
|
|
AC_MSG_RESULT($gt_cv_var)
|
|
if test $gt_cv_var = yes; then
|
|
AC_DEFINE([HAVE_]translit($2, [a-z], [A-Z])[_DECL], 1,
|
|
[Define if you have the declaration of $2.])
|
|
fi
|
|
])
|
|
|
|
# Prerequisites of lib/setenv.c.
|
|
AC_DEFUN([gl_PREREQ_SETENV],
|
|
[
|
|
AC_REQUIRE([AC_FUNC_ALLOCA])
|
|
AC_CHECK_HEADERS_ONCE(unistd.h)
|
|
AC_CHECK_HEADERS(search.h)
|
|
AC_CHECK_FUNCS(tsearch)
|
|
gt_CHECK_VAR_DECL([#include <unistd.h>], environ)
|
|
])
|
|
|
|
# Prerequisites of lib/unsetenv.c.
|
|
AC_DEFUN([gl_PREREQ_UNSETENV],
|
|
[
|
|
AC_CHECK_HEADERS_ONCE(unistd.h)
|
|
gt_CHECK_VAR_DECL([#include <unistd.h>], environ)
|
|
])
|