New: can't compile systemd with GCC 7.X when optimization is on
https://bugs.busybox.net/show_bug.cgi?id=10136
Bug ID: 10136
Summary: can't compile systemd with GCC 7.X when optimization
is on
Product: buildroot
Version: unspecified
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P5
Component: Other
Assignee: unassigned at buildroot.uclibc.org
Reporter: yurovsky at gmail.com
CC: buildroot at uclibc.org
Target Milestone: ---
Created attachment 7131
--> https://bugs.busybox.net/attachment.cgi?id=7131&action=edit
workaround
Building systemd will fail due to a bug in GCC if we're using the buildroot GCC 7.X toolchain and have enable optimization (-O3). That is:
BR2_OPTIMIZE_3=y
BR2_GCC_VERSION_7_X=y
BR2_GCC_VERSION="7.1.0"
The problem is with GCC's nonnull detection (there's nothing wrong with the systemd code in question) and it looks like it has been fixed upstream but we don't have the backported fix in Buildroot:
https://github.com/systemd/systemd/issues/6119
A quick workaround is to patch systemd with the attached patch but it seems that GCC should have some patches backported.
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[Buildroot] [Bug 10136] can't compile systemd with GCC 7.X when optimization is on
https://bugs.busybox.net/show_bug.cgi?id=10136
--- Comment #1 from Thomas Petazzoni <[email protected]> --- Thanks for the report!
Can you figure out the corresponding gcc PR, and therefore the gcc commit that fixes this ?
Thanks!
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[Buildroot] [Bug 10136] can't compile systemd with GCC 7.X when optimization is on
In reply to bugzilla at busybox.nethttps://bugs.busybox.net/show_bug.cgi?id=10136
--- Comment #2 from Andrey Yurovsky <[email protected]> ---
I'm having trouble tracking it down. From the systemd bug tracker discussion it looks like "7.1.1" addresses this but there's no such release. The Fedora package they mention is assumed to have the fix but I can't find anything in the changelog or referenced bug IDs that seems relevant. I'll keep searching.
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[Buildroot] [Bug 10136] can't compile systemd with GCC 7.X when optimization is on
In reply to bugzilla at busybox.nethttps://bugs.busybox.net/show_bug.cgi?id=10136
Yann E. MORIN <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |yann.morin.1998 at free.fr
Status|NEW |ASSIGNED
Assignee|unassigned at buildroot.uclibc |yann.morin.1998 at free.fr
|.org |Signature · 2 lines
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[Buildroot] [Bug 10136] can't compile systemd with GCC 7.X when optimization is on
In reply to bugzilla at busybox.nethttps://bugs.busybox.net/show_bug.cgi?id=10136
Yann E. MORIN <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|yann.morin.1998 at free.fr |unassigned at buildroot.uclibc
| |.org
Status|ASSIGNED |NEW--- Comment #3 from Yann E. MORIN <[email protected]> --- Ah, not a systemd bug; I relinquish it...
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[Buildroot] [Bug 10136] can't compile systemd with GCC 7.X when optimization is on
In reply to bugzilla at busybox.nethttps://bugs.busybox.net/show_bug.cgi?id=10136
--- Comment #4 from Thomas Petazzoni <[email protected]> --- This is in systemd upstream by commit
https://github.com/systemd/systemd/commit/fb1b58820fc4622a3b7f54b4096943e4768505cb,
which is in systemd >= 235.
We are currently using version 234 of systemd in Buildroot, but we already have a patch in patchwork updating it to version 236. Once this patch gets merged, this bug will be fixed.
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[Buildroot] [Bug 10136] can't compile systemd with GCC 7.X when optimization is on
In reply to bugzilla at busybox.nethttps://bugs.busybox.net/show_bug.cgi?id=10136
--- Comment #5 from Yann E. MORIN <[email protected]> --- (In reply to Thomas Petazzoni from comment #4)
Quoted 2 lines
we already have a patch in patchwork updating it to version 236. Once this patch gets merged, this bug will be fixed.
We must also apply https://patchwork.ozlabs.org/patch/856392/
first, otherwise the gitlab-ci infra will not be able to run the runtime tests.
Regards,
Yann E. MORIN.
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[Buildroot] [Bug 10136] can't compile systemd with GCC 7.X when optimization is on
In reply to bugzilla at busybox.nethttps://bugs.busybox.net/show_bug.cgi?id=10136
Thomas Petazzoni <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED--- Comment #6 from Thomas Petazzoni <[email protected]> --- Fixed by
https://git.buildroot.org/buildroot/commit/?id=db860d7837ca8665524f4046030beaf3d7f5e932.
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