Re: Running the compat testsuite in "non-mirror" mode

[Janis Johnson <janis187@us.ibm.com>]

On Fri, Nov 19, 2004 at 07:12:59PM +0100, Eric Botcazou wrote:
> > I think I understand now.  For anyone testing a particular target, the
> > compat tests would be run first using the compiler under test to compile
> > both parts of each test using default options, and again using different
> > sets of options for the two parts of each test to make sure those
> > options don't affect binary compatibility.  Is that right?
> 
> Yes; a maintainer of a given platform could decide that it is important to 
> always test a particular couple of options on this platform, and set the 
> appropriate bits in the right driver file.
> 
> > This is probably easy to set up in the compat.exp file for each compat
> > testsuite; I'll take a look.

Does this do the kind of thing you want?  This is just an example, not
options I actually want to add for powerpc.

Other files that set COMPAT_OPTIONS are lib/compat.exp,
gcc.dg/compat/struct-layout-1.exp, and g++.dg/compat/compat.exp.  This
continues to allow the default sets of options to be overridden.

Janis

Index: gcc.dg/compat/compat.exp
===================================================================
RCS file: /opt/gcc-cvs/gcc/gcc/testsuite/gcc.dg/compat/compat.exp,v
retrieving revision 1.1
diff -u -p -r1.1 compat.exp
--- gcc.dg/compat/compat.exp	5 May 2003 21:59:35 -0000	1.1
+++ gcc.dg/compat/compat.exp	20 Nov 2004 00:25:50 -0000
@@ -1,4 +1,4 @@
-# Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -34,6 +34,20 @@ global GCC_UNDER_TEST
 # Load procedures from common libraries. 
 load_lib standard.exp
 load_lib gcc.exp
+load_lib target-supports.exp
+
+# Some targets run the tests multiple times with different sets of options.
+if ![info exists COMPAT_OPTIONS] {
+    if { [istarget powerpc*-*-linux*] && [is-effective-target vmx_hw] } {
+	set COMPAT_OPTIONS [list \
+		[list {} {}] \
+		[list {-maltivec -mabi=altivec} {-mno-altivec -mabi=altivec}]]
+    } elseif [istarget powerpc*-*-linux*] {
+	set COMPAT_OPTIONS [list \
+		[list {} {}] \
+		[list {-O1} {-O2}]]
+    }
+}
 
 #
 # compat-use-alt-compiler -- make the alternate compiler the default
@@ -65,7 +79,8 @@ proc compat-use-tst-compiler { } {
 }
 
 # Load the language-independent compabibility support procedures.
-# This must be done after the compat-use-*-compiler definitions.
+# This must be done after the compat-use-*-compiler definitions and
+# after defining COMPAT_OPTIONS.
 load_lib compat.exp
 
 gcc_init