libgomp testsuite: tell warning from error diagnostics, etc. [PR80219, PR85303]

This changes makes 'dg-warning', 'dg-error', 'dg-bogus', 'dg-message' behave as
expected, and also enables use of relative line numbers as well as 'dg-line'.

	libgomp/
	PR testsuite/80219
	PR testsuite/85303
	* testsuite/lib/libgomp.exp (libgomp_init): Set
	'gcc_warning_prefix', 'gcc_error_prefix'.

diff --git a/libgomp/testsuite/lib/libgomp.exp b/libgomp/testsuite/lib/libgomp.exp
index 5d86e2ac095fc8fa426ff28ecb8ee851e5e5b598..72d001186a5767eca406aee151378c5a559d05a4 100644 (file)
--- a/libgomp/testsuite/lib/libgomp.exp
+++ b/libgomp/testsuite/lib/libgomp.exp
@@ -241,6 +241,12 @@ proc libgomp_init { args } {
     if { $offload_additional_options != "" } {
        lappend ALWAYS_CFLAGS "additional_flags=${offload_additional_options}"
     }
+
+    # Tell warning from error diagnostics.  This fits for C, C++, and Fortran.
+    global gcc_warning_prefix
+    set gcc_warning_prefix "\[Ww\]arning:"
+    global gcc_error_prefix
+    set gcc_error_prefix "(\[Ff\]atal )?\[Ee\]rror:"
 }
 
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