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Bug 915912 - sys-devel/gcc-13.2.1_p20231014 fails with crossdev i486-gentoo-linux-musl - brain.h:62:1: error: unknown machine mode ‘BF’
Summary: sys-devel/gcc-13.2.1_p20231014 fails with crossdev i486-gentoo-linux-musl - b...
Status: RESOLVED WORKSFORME
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: Normal normal
Assignee: Gentoo Toolchain Maintainers
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-10-18 04:01 UTC by immolo
Modified: 2023-10-18 04:54 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---

Attachments
build.log (build.log.xz,52.05 KB, application/x-xz)
2023-10-18 04:02 UTC, immolo 		Details
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Description immolo 2023-10-18 04:01:41 UTC 
Came across this issue while trying to create i486 musl stages.

Steps to reproduce from testing Gentoo:

1. emerge -va sys-devel/crossdev
2. crossdev -t i486-gentoo-linux-musl
3. i486-gentoo-linux-musl-emerge -va sys-devel/gcc

Error:

make[2]: Entering directory '/usr/i486-gentoo-linux-musl/tmp/portage/sys-devel/gcc-13.2.1_p20231014/work/build/i486-gentoo-linux-musl/libgcc'
i486-gentoo-linux-musl-cc --sysroot=/usr/i486-gentoo-linux-musl   -g -march=i486 -pipe -O2 -O2  -g -march=i486 -pipe -O2 -DIN_GCC    -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem ./include  -fpic -mlong-double-80 -DUSE_ELF_SYMVER  -DGTHREAD_USE_WEAK=0 -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -fno-stack-clash-protection  -fpic -mlong-double-80 -DUSE_ELF_SYMVER  -DGTHREAD_USE_WEAK=0 -I. -I. -I../.././gcc -I/usr/i486-gentoo-linux-musl/tmp/portage/sys-devel/gcc-13.2.1_p20231014/work/gcc-13-20231014/libgcc -I/usr/i486-gentoo-linux-musl/tmp/portage/sys-devel/gcc-13.2.1_p20231014/work/gcc-13-20231014/libgcc/. -I/usr/i486-gentoo-linux-musl/tmp/portage/sys-devel/gcc-13.2.1_p20231014/work/gcc-13-20231014/libgcc/../gcc -I/usr/i486-gentoo-linux-musl/tmp/portage/sys-devel/gcc-13.2.1_p20231014/work/gcc-13-20231014/libgcc/../include -I/usr/i486-gentoo-linux-musl/tmp/portage/sys-devel/gcc-13.2.1_p20231014/work/gcc-13-20231014/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS  -DUSE_TLS -Wno-missing-prototypes -Wno-type-limits -msse2 -o extendbfsf2.o -MT extendbfsf2.o -MD -MP -MF extendbfsf2.dep  -c /usr/i486-gentoo-linux-musl/tmp/portage/sys-devel/gcc-13.2.1_p20231014/work/gcc-13-20231014/libgcc/soft-fp/extendbfsf2.c -fvisibility=hidden -DHIDE_EXPORTS
In file included from /usr/i486-gentoo-linux-musl/tmp/portage/sys-devel/gcc-13.2.1_p20231014/work/gcc-13-20231014/libgcc/soft-fp/extendbfsf2.c:31:
/usr/i486-gentoo-linux-musl/tmp/portage/sys-devel/gcc-13.2.1_p20231014/work/gcc-13-20231014/libgcc/soft-fp/brain.h:62:1: error: unknown machine mode ‘BF’
   62 | typedef float BFtype __attribute__ ((mode (BF)));
      | ^~~~~~~
make[2]: *** [/usr/i486-gentoo-linux-musl/tmp/portage/sys-devel/gcc-13.2.1_p20231014/work/gcc-13-20231014/libgcc/shared-object.mk:14: extendbfsf2.o] Error 1
make[2]: Leaving directory '/usr/i486-gentoo-linux-musl/tmp/portage/sys-devel/gcc-13.2.1_p20231014/work/build/i486-gentoo-linux-musl/libgcc'
make[2]: *** Waiting for unfinished jobs....
Comment 1 immolo 2023-10-18 04:02:49 UTC 
Created attachment 873069 [details]
build.log
Comment 2 immolo 2023-10-18 04:04:17 UTC 
Also tried with setarch i486 just to rule that out before reporting.
Comment 3 immolo 2023-10-18 04:54:56 UTC 
Ok so cleaning out the the crossdev target and rebuilding solves this issue. It's odd how I hit this the first time but as it seems OK with fresh sources I'm going to mark this as WORKSFORME.