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Subject[PATCH] tools: feature/test-libperl.c: Sync PERL_EMBED_CCOPTS with perf
Date
When trying to build perf with a LLVM/Clang toolchain people see errors
when testing for libperl feature.

Jiri reports:

> I'm getting some other lto related error:
>
> $ cat test-libperl.make.output
> clang-13: error: optimization flag '-ffat-lto-objects' is not supported [-Werror,-Wignored-optimization-argument]
>

The reason is PERL_EMBED_CCOPTS is defined in two places:

tools/build/feature/Makefile
tools/perf/Makefile.config

As an result FLAGS_PERL_EMBED is set differently.

For building perf '-ffat-lto-objects' is filtered-out:

$ git grep ffat-lto-objects tools/perf/
tools/perf/Makefile.config: PERL_EMBED_CCOPTS := $(filter-out -flto=auto -ffat-lto-objects, $(PERL_EMBED_CCOPTS))

Sync PERL_EMBED_CCOPTS in tools/build/feature/Makefile to fix this.

For a minimal fix for Linux v5.17 this here was preferred by Arnaldo.

Link: https://marc.info/?t=164646683300002&r=1&w=2
Reported-by: Jiri Olsa <olsajiri@gmail.com>
Reported-by: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
Suggested-by: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
---
tools/build/feature/Makefile | 1 +
1 file changed, 1 insertion(+)

diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index 1480910c792e..869073cf8449 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -218,6 +218,7 @@ PERL_EMBED_LDOPTS = $(shell perl -MExtUtils::Embed -e ldopts 2>/dev/null)
PERL_EMBED_LDFLAGS = $(call strip-libs,$(PERL_EMBED_LDOPTS))
PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))
PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`
+PERL_EMBED_CCOPTS := $(filter-out -ffat-lto-objects, $(PERL_EMBED_CCOPTS))
FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)

$(OUTPUT)test-libperl.bin:
--
2.35.1
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