From 6d9d949fb4962e32636aee48a948081d8936d318 Mon Sep 17 00:00:00 2001
From: Jitka Plesnikova <jplesnik@redhat.com>
Date: Wed, 11 Jan 2023 09:12:18 +0100
Subject: [PATCH] Add definition of OPTIMIZE to .ph files

The fortify.h header includes a test to ensure that -O is used when
compiling with _FORTIFY_SOURCE, and the header looks for OPTIMIZE, which
is set by the compiler whenever -O is used.  Perl translates this test
to the .ph file, but nothing ever sets OPTIMIZE. This causes a warning
for anything that uses features.ph.

_FORTIFY_SOURCE is defined in /usr/lib64/perl5/_h2ph_pre.ph which is
generated by h2ph. It uses value of @Config{'ccsymbols', 'cppsymbols',
'cppccsymbols'} which does not contain definition for OPTIMIZE.

The patch updated h2ph to add OPTIMIZE if -O is used.
---
 utils/h2ph.PL | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/utils/h2ph.PL b/utils/h2ph.PL
index afa53c2..3950d11 100644
--- a/utils/h2ph.PL
+++ b/utils/h2ph.PL
@@ -865,6 +865,11 @@ sub _extract_cc_defines
     my $allsymbols  = join " ",
 	@Config{'ccsymbols', 'cppsymbols', 'cppccsymbols'};
 
+    # If optimizing -O2 is used, add the definition
+    if ($Config{'ccflags'} =~ /(?:\s+|^)-O([\d]+)(?:\s+|$)/) {
+	$allsymbols .= " __OPTIMIZE__=$1";
+    }
+
     # Split compiler pre-definitions into 'key=value' pairs:
     while ($allsymbols =~ /([^\s]+)=((\\\s|[^\s])+)/g) {
 	$define{$1} = $2;
-- 
2.39.0