From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Korsgaard Date: Thu, 29 Oct 2020 23:26:21 +0100 Subject: [Buildroot] [PATCHv2] toolchain-wrapper: Disable -ftree-loop-distribute-patterns when building for microblaze with gcc >= 10 In-Reply-To: <20201006202920.592493-1-romain.naour@gmail.com> (Romain Naour's message of "Tue, 6 Oct 2020 22:29:20 +0200") References: <20201006202920.592493-1-romain.naour@gmail.com> Message-ID: <87blgkfz3m.fsf@dell.be.48ers.dk> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net >>>>> "Romain" == Romain Naour writes: > GCC 10 now enable by default -ftree-loop-distribute-patterns at -O2 or -Os > optimization level instead of -O3, see commit [1]. > Due to this change, the microblaze kernel doesn't boot (as reported by > toolchain-builder project). > The gcc docs between version 9 and 10 has been updated accordingly [2] [3] > but there no word about this change in the gcc 10 changelog [4]. > Fixes microblazebe: > https://gitlab.com/bootlin/toolchains-builder/-/jobs/729359536 (glibc) > https://gitlab.com/bootlin/toolchains-builder/-/jobs/729359538 (musl) > https://gitlab.com/bootlin/toolchains-builder/-/jobs/729359540 (uClubc-ng) > Fixes microblazeel: > https://gitlab.com/bootlin/toolchains-builder/-/jobs/729359542 (glibc) > https://gitlab.com/bootlin/toolchains-builder/-/jobs/729359544 (musl) > https://gitlab.com/bootlin/toolchains-builder/-/jobs/729359546 (uClibc-ng) > This has been reported upsteam [5]. > [1] https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=5879ab5fafedc8f6f9bfe95a4cf8501b0df90edd > [2] https://gcc.gnu.org/onlinedocs/gcc-9.3.0/gcc/Optimize-Options.html#Optimize-Options > [3] https://gcc.gnu.org/onlinedocs/gcc-10.2.0/gcc/Optimize-Options.html#Optimize-Options > [4] https://gcc.gnu.org/gcc-10/changes.html > [5] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97208 > Signed-off-by: Romain Naour > Cc: Thomas Petazzoni > --- > It's not clear if building the kernel with gcc 9 and -O3 trigger this issue. > It has been noticed by the change from [1]. > v2: move -fno-tree-loop-distribute-patterns to the toolchain-wrapper (Arnout). Committed to 2020.08.x, thanks. -- Bye, Peter Korsgaard