60 lines
1.8 KiB
Diff
60 lines
1.8 KiB
Diff
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From a8d0bb2102bc09bfdc7e661fb159d9257474f168 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
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Date: Thu, 10 Apr 2014 16:16:31 +0200
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Subject: [PATCH] Pass -fwrapv to stricter GCC 4.9
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This is port to 5.18.2 of the two upstream patches:
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commit 869747506fd0081f6c7eed149ec6f7adbcc4d5b1
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Author: H.Merijn Brand <h.m.brand@xs4all.nl>
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Date: Wed Apr 9 11:16:55 2014 +0200
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gcc 4.9 by default does some optimizations that break perl (#121505)
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Patch by Tony Cook
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commit 00051dd553979bd2a1dee100c324b59ee76a49e7
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Author: H.Merijn Brand <h.m.brand@xs4all.nl>
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Date: Wed Apr 9 12:31:23 2014 +0200
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-fwrapv is broken prior to gcc-4.3 (googled and patched by Zefram)
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Signed-off-by: Petr Písař <ppisar@redhat.com>
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---
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Configure | 16 ++++++++++++++++
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1 file changed, 16 insertions(+)
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diff --git a/Configure b/Configure
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index 37b49c8..47e7b8f 100755
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--- a/Configure
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+++ b/Configure
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@@ -4520,6 +4520,22 @@ case "$gccversion" in
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$rm -f try try.*
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esac
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+# gcc 4.9 by default does some optimizations that break perl.
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+# see ticket 121505.
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+#
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+# The -fwrapv disables those optimizations (and probably others,) so
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+# for gcc 4.9 (and later, since the optimizations probably won't go
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+# away), add -fwrapv unless the user requests -fno-wrapv, which
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+# disables -fwrapv, or if the user requests -fsanitize=undefined,
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+# which turns the overflows -fwrapv ignores into runtime errors.
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+case "$gccversion" in
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+4.[3-9].*|4.[1-9][0-9]*|[5-9].*|[1-9][0-9]*)
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+ case "$ccflags" in
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+ *-fno-wrapv*|*-fsanitize=undefined*|*-fwrapv*) ;;
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+ *) ccflags="$ccflags -fwrapv" ;;
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+ esac
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+esac
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+
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: What should the include directory be ?
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echo " "
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$echo $n "Hmm... $c"
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--
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1.9.0
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