Fix locking problem in fmtmsg

stdlib/bug-fmtmsg1.c

@@ -0,0 +1,28 @@
+#include <fmtmsg.h>
+#include <stdio.h>
+
+
+static int
+do_test (void)
+{
+  /* Ugly, but fmtmsg would otherwise print to stderr which we do not
+     want.  */
+  fclose (stderr);
+  stderr = stdout;
+
+  int e1;
+  e1 = fmtmsg (MM_PRINT, "label:part", MM_WARNING, "text", "action", "tag");
+
+  int e2;
+  e2 = fmtmsg (MM_PRINT, "label2:part2", 11, "text2", "action2", "tag2");
+
+  addseverity (10, "additional severity");
+
+  int e3;
+  e3 = fmtmsg (MM_PRINT, "label3:part3", 10, "text3", "action3", "tag3");
+
+  return e1 != 0 || e2 != 0 || e3 != 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"