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-rw-r--r--gnulib-m4/setenv.m471
1 files changed, 71 insertions, 0 deletions
diff --git a/gnulib-m4/setenv.m4 b/gnulib-m4/setenv.m4
new file mode 100644
index 00000000..e28407ee
--- /dev/null
+++ b/gnulib-m4/setenv.m4
@@ -0,0 +1,71 @@
+# setenv.m4 serial 11
+dnl Copyright (C) 2001-2004, 2006-2009 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([gl_FUNC_SETENV],
+[
+ AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+ AC_CHECK_FUNCS_ONCE([setenv])
+ if test $ac_cv_func_setenv = no; then
+ HAVE_SETENV=0
+ AC_LIBOBJ([setenv])
+ gl_PREREQ_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])
+ if test $ac_cv_func_setenv = no; then
+ HAVE_SETENV=0
+ fi
+ gl_PREREQ_SETENV
+])
+
+AC_DEFUN([gl_FUNC_UNSETENV],
+[
+ AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+ AC_CHECK_FUNCS([unsetenv])
+ if test $ac_cv_func_unsetenv = no; then
+ HAVE_UNSETENV=0
+ AC_LIBOBJ([unsetenv])
+ 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
+ VOID_UNSETENV=1
+ fi
+ fi
+])
+
+# Prerequisites of lib/setenv.c.
+AC_DEFUN([gl_PREREQ_SETENV],
+[
+ AC_REQUIRE([AC_FUNC_ALLOCA])
+ AC_REQUIRE([gl_ENVIRON])
+ AC_CHECK_HEADERS_ONCE([unistd.h])
+ AC_CHECK_HEADERS([search.h])
+ AC_CHECK_FUNCS([tsearch])
+])
+
+# Prerequisites of lib/unsetenv.c.
+AC_DEFUN([gl_PREREQ_UNSETENV],
+[
+ AC_REQUIRE([gl_ENVIRON])
+ AC_CHECK_HEADERS_ONCE([unistd.h])
+])