introduce target fileio and require it in tests that use tmpnam

Some target C libraries that aren't recognized as freestanding don't
have filesystem support, so calling tmpnam, fopen/open and
remove/unlink fails to link.

This patch introduces a fileio effective target to the testsuite, and
requires it in the tests that call tmpnam.


for  gcc/testsuite/ChangeLog

	* lib/target-supports.exp (check_effective_target_fileio): New.
	* gcc.c-torture/execute/fprintf-2.c: Require it.
	* gcc.c-torture/execute/printf-2.c: Likewise.
	* gcc.c-torture/execute/user-printf.c: Likewise.

1 files changed, 13 insertions, 0 deletions

diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index a667ddf4fe4..008def691b3 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -751,6 +751,19 @@ proc check_effective_target_freestanding { } {
     return 0
 }
 
+# Check to see that file I/O functions are available.
+proc check_effective_target_fileio { } {
+    return [check_no_compiler_messages fileio_available executable {
+#include <stdio.h>
+int main() {
+    char *n = tmpnam (NULL);
+    FILE *f = fopen (n, "w");
+    fclose (f);
+    remove (n);
+    return 0;
+} } ""]
+}
+
 # Return 1 if target has packed layout of structure members by
 # default, 0 otherwise.  Note that this is slightly different than
 # whether the target has "natural alignment": both attributes may be