re PR bootstrap/77569 (self tests fail when not using C locale)

	PR bootstrap/77569
	* input.c (ebcdic_execution_charset::on_error): Don't use strstr for
	a substring of the message, but strcmp with the whole message.  Ifdef
	ENABLE_NLS, translate the message first using dgettext.

From-SVN: r244047

gcc/ChangeLog

+2017-01-04  Jakub Jelinek  <jakub@redhat.com>
+
+	PR bootstrap/77569
+	* input.c (ebcdic_execution_charset::on_error): Don't use strstr for
+	a substring of the message, but strcmp with the whole message.  Ifdef
+	ENABLE_NLS, translate the message first using dgettext.
+
 2017-01-03  Jeff Law  <law@redhat.com>
 
 	PR tree-optimizatin/78856

gcc/input.c

@@ -2026,9 +2026,14 @@ class ebcdic_execution_charset : public lexer_test_options
     ATTRIBUTE_FPTR_PRINTF(5,0)
   {
     gcc_assert (s_singleton);
+    /* Avoid exgettext from picking this up, it is translated in libcpp.  */
+    const char *msg = "conversion from %s to %s not supported by iconv";
+#ifdef ENABLE_NLS
+    msg = dgettext ("cpplib", msg);
+#endif
     /* Detect and record errors emitted by libcpp/charset.c:init_iconv_desc
        when the local iconv build doesn't support the conversion.  */
-    if (strstr (msgid, "not supported by iconv"))
+    if (strcmp (msgid, msg) == 0)
       {
 	s_singleton->m_num_iconv_errors++;
 	return true;