[gcc r12-3062] gcc.c-torture/execute: Fix tmpnam issue on Windows

[Jonathan Yong <jyong@gcc.gnu.org>]

https://gcc.gnu.org/g:4a4616e53f440e15d0f3e91e23b67a3b5c84dddf

commit r12-3062-g4a4616e53f440e15d0f3e91e23b67a3b5c84dddf
Author: Jonathan Yong <10walls@gmail.com>
Date:   Sun Aug 22 03:05:07 2021 +0000

    gcc.c-torture/execute: Fix tmpnam issue on Windows
    
    2021-08-22  Jonathan Yong  <10walls@gmail.com>
    
    gcc/testsuite/ChangeLog:
    
            * gcc.c-torture/execute/gcc_tmpnam.h: Fix tmpnam case on Windows
            where it can return a filename with "\" to indicate current
            directory.
            * gcc.c-torture/execute/fprintf-2.c: Use wrapper.
            * gcc.c-torture/execute/printf-2.c: Use wrapper.
            * gcc.c-torture/execute/user-printf.c: Use wrapper.
    
    Signed-off-by: Jonathan Yong <10walls@gmail.com>

Diff:
---
 gcc/testsuite/gcc.c-torture/execute/fprintf-2.c   |  3 ++-
 gcc/testsuite/gcc.c-torture/execute/gcc_tmpnam.h  | 13 +++++++++++++
 gcc/testsuite/gcc.c-torture/execute/printf-2.c    |  3 ++-
 gcc/testsuite/gcc.c-torture/execute/user-printf.c |  3 ++-
 4 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/gcc/testsuite/gcc.c-torture/execute/fprintf-2.c b/gcc/testsuite/gcc.c-torture/execute/fprintf-2.c
index d8e19e7b2f8..00517d1d1ac 100644
--- a/gcc/testsuite/gcc.c-torture/execute/fprintf-2.c
+++ b/gcc/testsuite/gcc.c-torture/execute/fprintf-2.c
@@ -9,10 +9,11 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include "gcc_tmpnam.h"
 
 int main (void)
 {
-  char *tmpfname = tmpnam (0);
+  char *tmpfname = gcc_tmpnam (0);
   FILE *f = fopen (tmpfname, "w");
   if (!f)
     {
diff --git a/gcc/testsuite/gcc.c-torture/execute/gcc_tmpnam.h b/gcc/testsuite/gcc.c-torture/execute/gcc_tmpnam.h
new file mode 100644
index 00000000000..2136e6eaf13
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/gcc_tmpnam.h
@@ -0,0 +1,13 @@
+#include <stdio.h>
+#ifndef GCC_TMPNAM
+#define GCC_TMPNAM
+static inline char *gcc_tmpnam(char *s)
+{
+  char *ret = tmpnam (s);
+  // Windows sometimes prepends a backslash to denote the current directory,
+  // so swallow that if it occurs
+  if (ret[0] == '\\')
+    ++ret;
+  return ret;
+}
+#endif
diff --git a/gcc/testsuite/gcc.c-torture/execute/printf-2.c b/gcc/testsuite/gcc.c-torture/execute/printf-2.c
index 4e7d8f7cdfa..2087bba8448 100644
--- a/gcc/testsuite/gcc.c-torture/execute/printf-2.c
+++ b/gcc/testsuite/gcc.c-torture/execute/printf-2.c
@@ -10,6 +10,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include "gcc_tmpnam.h"
 
 __attribute__ ((noipa)) void
 write_file (void)
@@ -26,7 +27,7 @@ write_file (void)
 
 int main (void)
 {
-  char *tmpfname = tmpnam (0);
+  char *tmpfname = gcc_tmpnam (0);
   FILE *f = freopen (tmpfname, "w", stdout);
   if (!f)
     {
diff --git a/gcc/testsuite/gcc.c-torture/execute/user-printf.c b/gcc/testsuite/gcc.c-torture/execute/user-printf.c
index 42a3b17f123..bfee0760dd7 100644
--- a/gcc/testsuite/gcc.c-torture/execute/user-printf.c
+++ b/gcc/testsuite/gcc.c-torture/execute/user-printf.c
@@ -11,6 +11,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include "gcc_tmpnam.h"
 
 void __attribute__ ((format (printf, 1, 2), noipa))
 user_print (const char *fmt, ...)
@@ -23,7 +24,7 @@ user_print (const char *fmt, ...)
 
 int main (void)
 {
-  char *tmpfname = tmpnam (0);
+  char *tmpfname = gcc_tmpnam (0);
   FILE *f = freopen (tmpfname, "w", stdout);
   if (!f)
     {