opts-common.c (integral_argument): Set errno properly in one case.

    * opts-common.c (integral_argument): Set errno properly in one case.

    * gcc.dg/diag-sanity.c: New test.

From-SVN: r270022

gcc/ChangeLog

+2019-03-29  Roman Zhuykov  <zhroma@ispras.ru>
+
+	* opts-common.c (integral_argument): Set errno properly in one case.
+
 2019-03-29  Martin Liska  <mliska@suse.cz>
 
 	* doc/invoke.texi: Remove -Wchkp from documentation.

gcc/opts-common.c

@@ -205,8 +205,10 @@ integral_argument (const char *arg, int *err, bool byte_size_suffix)
 	  value = strtoull (arg, &end, 0);
 	  if (*end)
 	    {
-	      /* errno is most likely EINVAL here.  */
-	      *err = errno;
+	      if (errno)
+		*err = errno;
+	      else
+		*err = EINVAL;
 	      return -1;
 	    }
 

gcc/testsuite/ChangeLog

+2019-03-29  Roman Zhuykov  <zhroma@ispras.ru>
+
+	* gcc.dg/diag-sanity.c: New test.
+
 2019-03-29  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/89871

gcc/testsuite/gcc.dg/diag-sanity.c

+/* Verify that an invalid argument is diagnosed correcly.
+   { dg-do compile }
+   { dg-options "-fdiagnostics-minimum-margin-width=42xyz -flto-compression-level=2-O2" } */
+
+
+/* { dg-error "argument to '-fdiagnostics-minimum-margin-width=' should be a non-negative integer" "" { target *-*-* } 0 }
+   { dg-error "argument to '-flto-compression-level=' should be a non-negative integer" "" { target *-*-* } 0 } */