| Summary: | =dev-build/libtool-2.4.6-r6: libtool strips LDFLAGS/CFLAGS for "--param<space>option" style flags | ||
|---|---|---|---|
| Product: | Gentoo Linux | Reporter: | Marco Ziebell <ziebell_marco> |
| Component: | Current packages | Assignee: | Gentoo's Team for Core System packages <base-system> |
| Status: | CONFIRMED --- | ||
| Severity: | normal | CC: | esigra, sam, toolchain, ziebell_marco |
| Priority: | Normal | ||
| Version: | unspecified | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Package list: | Runtime testing required: | --- | |
| Bug Depends on: | |||
| Bug Blocks: | 59506, 331933 | ||
| Attachments: | build log of =dev-libs/libffi-3.2.1 | ||
libtool performs parameter reordering to accomodate toolchain deficiencies: reorder libraries, sort CFLAGS, objects, libraries and so on.
Unfortunatly that means it has to understand multi-arguments flags like
CFLAGS="... --param prefetch-latency=600 ..."
libtool does not understand them. The workaround is to use single-argument form:
CFLAGS="... --param=prefetch-latency=600 ..."
Running 'elibtoolize' produces the same broken behaviour. Reassigning to base-system@ to triage further and maybe ask upstream to enhance option parsing. Here is a libtool's flag whitelist:
https://git.savannah.gnu.org/cgit/libtool.git/tree/build-aux/ltmain.in#n5365
|
Created attachment 470114 [details] build log of =dev-libs/libffi-3.2.1 During the linking-phase of libffi the LDFLAGS are stripped. e.g with CFLAGS and LDFLAGS like CFLAGS="-march=native -mtune=native -w -pthread -pipe -fPIC -fdata-sections -ffunction-sections -g0 -O2 -flto=2 -fuse-linker-plugin -flto-partition=none -fomit-frame-pointer -ftree-vectorize -fira-loop-pressure -fno-aggressive-loop-optimizations -funswitch-loops -fgcse-sm -fgcse-las -fgcse-after-reload -fopenmp-simd -fopenmp -ftree-partial-pre -finline-functions -funroll-loops -mvzeroupper -malign-data=cacheline -maccumulate-outgoing-args -fschedule-insns -fsched-pressure -fmodulo-sched -fmodulo-sched-allow-regmoves --param prefetch-latency=600" LDFLAGS="-Wl,-O1,--icf=all,--icf-iterations=4,--gc-sections,--as-needed,--hash-style=gnu ${CFLAGS}" the resulting command invocation looks like this. please see the incorrect "--param". -march=native -mtune=native -pthread -O2 -flto=2 -fuse-linker-plugin -flto-partition=none -fopenmp -mvzeroupper -malign-data=cacheline -maccumulate-outgoing-args -Wl,-O1 -Wl,--icf=all -Wl,--icf-iterations=4 -Wl,--gc-sections -Wl,--as-needed -Wl,--hash-style=gnu -march=native -mtune=native -pthread -fPIC -fdata-sections -ffunction-sections -O2 -flto=2 -fuse-linker-plugin -flto-partition=none -fomit-frame-pointer -ftree-vectorize -fira-loop-pressure -fno-aggressive-loop-optimizations -funswitch-loops -fgcse-sm -fgcse-las -fgcse-after-reload -fopenmp-simd -fopenmp -ftree-partial-pre -finline-functions -funroll-loops -mvzeroupper -malign-data=cacheline -maccumulate-outgoing-args -fschedule-insns -fsched-pressure -fmodulo-sched --param -fmodulo-sched-allow-regmoves -fuse-ld=gold -Wl,-O1 -Wl,--icf=all -Wl,--icf-iterations=4 -Wl,--gc-sections -Wl,--as-needed -Wl,--hash-style=gnu -march=native -mtune=native -pthread -O2 -flto=2 -fuse-linker-plugin -flto-partition=none -fopenmp -mvzeroupper -malign-data=cacheline -maccumulate-outgoing-args -pthread -fopenmp -Wl,-soname -Wl,libffi.so.6 -o .libs/libffi.so.6.0.4 The combination of CFLAGS and LDFLAGS is needed for LTO. Even though LTO is not officially supported (my last information), incorrect stripping is always bad.