[binutils-gdb] ignore lto-wrapper warnings for lto builds.

[Nick Clifton <nickc@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=96127db593a96c4848f76ecaff7f4feb5850c4b2

commit 96127db593a96c4848f76ecaff7f4feb5850c4b2
Author: Matthias Klose <doko@debian.org>
Date:   Thu Jun 29 14:30:55 2023 +0100

    ignore lto-wrapper warnings for lto builds.
    
      I see these warnings from time to time, when configuring a build with  --enable-pgo-build=lto, I haven't yet found out why I see these sometime, and  why not. E.g. https://gcc.gnu.org/PR109241. Just ignore these when they appear  in test cases. lto-wrapper: warning: using serial compilation of N LTRANS jobs

Diff:
---
 binutils/testsuite/lib/binutils-common.exp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/binutils/testsuite/lib/binutils-common.exp b/binutils/testsuite/lib/binutils-common.exp
index 2293895a614..7e6bf16ee6e 100644
--- a/binutils/testsuite/lib/binutils-common.exp
+++ b/binutils/testsuite/lib/binutils-common.exp
@@ -666,6 +666,9 @@ proc prune_warnings_extra { text } {
     # -z execstack is used.
     regsub -all "(^|\n)(\[^\n\]*: warning: enabling an executable stack because of -z execstack command line option\[^\n\]*\n?)+" $text "\\1" text
 
+    # Ignore LTO warnings triggered by configuring with --enable-pgo-build=lto.
+    regsub -all "(^|\n)(\[^\n\]*lto-wrapper: warning: using serial compilation of \[0-9\]+ LTRANS jobs\[^\n\]*\n?)+" $text "\\1" text
+
     return $text
 }