[tests/tversion.c] Try to detect missing output from the first printf

with i586-mingw32msvc-gcc -D__USE_MINGW_ANSI_STDIO and run under Wine.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/branches/4.0@12968 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 17 insertions, 1 deletions

diff --git a/tests/tversion.c b/tests/tversion.c
index 01f755c79..8f6c072e7 100644
--- a/tests/tversion.c
+++ b/tests/tversion.c
@@ -25,6 +25,8 @@ http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
 # include "config.h"
 #endif
 
+#include <errno.h>
+
 #include "mpfr-intmax.h"
 #include "mpfr-test.h"
 
@@ -40,9 +42,17 @@ main (void)
 
   tests_start_mpfr ();
 
+  errno = 0;
+
   /*********************** MPFR version and patches ************************/
 
-  printf ("[tversion] MPFR %s\n", MPFR_VERSION_STRING);
+  /* With i586-mingw32msvc-gcc -D__USE_MINGW_ANSI_STDIO and run under Wine,
+     the following line is not output. Let's try to detect the error. */
+  if (printf ("[tversion] MPFR %s\n", MPFR_VERSION_STRING) < 0)
+    {
+      perror ("tversion (first printf)");
+      err = 1;
+    }
 
   if (strcmp (mpfr_get_patches (), "") != 0)
     printf ("[tversion] MPFR patches: %s\n", mpfr_get_patches ());
@@ -409,6 +419,12 @@ main (void)
 
   /*************************************************************************/
 
+  if (errno != 0)
+    {
+      perror ("tversion");
+      err = 1;
+    }
+
   tests_end_mpfr ();
 
   return err;