Ubuntu
u-boot package

Amd64 build fails with "‘-fcf-protection=full’ is not supported for this target"

Bug #2034536 reported by Heinrich Schuchardt
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
u-boot (Ubuntu)
Fix Released
Undecided
Unassigned

Bug Description

Rebuilding the u-boot package on the amd64 architecture failed with:

cc1: error: ‘-fcf-protection=full’ is not supported for this target

https://launchpadlibrarian.net/685589889/buildlog_ubuntu-mantic-amd64.u-boot_2023.07+dfsg-1ubuntu1_BUILDING.txt.gz

Tags: patch
Revision history for this message
Heinrich Schuchardt (xypron) wrote :

Cross compiling should not use the flag -fcf-protection=full which is specific to the x86 architecture.

Revision history for this message
Dave Jones (waveform) wrote :

Attaching a rather hacky patch for this (excludes -fcf-protection entirely; would be nicer to do it just for the cross-built stuff but I didn't have the time to figure that out yet). Will upload shortly.

Ubuntu Foundations Team Bug Bot (crichton)
tags: added: patch
Revision history for this message
Steve Langasek (vorlon) wrote :

@Dave consider that dpkg-buildflags is sensitive to the dpkg arch env variables. E.g.:

$ DEB_HOST_ARCH=amd64 dpkg-buildflags --get CFLAGS
-g -O2 -ffile-prefix-map=/tmp=. -flto=auto -ffat-lto-objects -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection
$ DEB_HOST_ARCH=armhf dpkg-buildflags --get CFLAGS
-g -O2 -ffile-prefix-map=/tmp=. -fstack-protector-strong -Wformat -Werror=format-security
$

While stripping this one flag may fix the build, ideally we would have a more general fix that uses target-appropriate flags for the cross-build.

Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package u-boot - 2023.07+dfsg-1ubuntu2

---------------
u-boot (2023.07+dfsg-1ubuntu2) mantic; urgency=medium

  * Fix FTBFS by excluding -fcf-protection from CFLAGS; this flag isn't valid
    when cross-building (LP: #2034536)

 -- Dave Jones <email address hidden> Thu, 21 Sep 2023 12:00:38 +0100

Changed in u-boot (Ubuntu):
status: New → Fix Released
Benjamin Drung (bdrung)
tags: removed: foundations-todo
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