Re: [PATCH v1 04/13] perf build: Error if no libelf and NO_LIBELF isn't set

[Arnaldo Carvalho de Melo]

Em Fri, Mar 10, 2023 at 10:57:44PM -0800, Ian Rogers escreveu:
> Building without libelf support is going disable a lot of
> functionality. Require that the NO_LIBELF=1 build option is passed if
> this is intentional.


'make -C tools/perf build-test' is failing:

⬢[acme@toolbox perf-tools-next]$ git log --oneline -1 ; time make -C tools/perf build-test
ace4d44d094ce850 (HEAD -> perf-tools-next) perf build: Remove redundant NO_NEWT build option
make: Entering directory '/var/home/acme/git/perf-tools-next/tools/perf'
Warning: Kernel ABI header at 'tools/include/uapi/linux/in.h' differs from latest version at 'include/uapi/linux/in.h'
Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' differs from latest version at 'arch/x86/include/asm/cpufeatures.h'
Warning: Kernel ABI header at 'tools/arch/arm64/include/uapi/asm/perf_regs.h' differs from latest version at 'arch/arm64/include/uapi/asm/perf_regs.h'
Warning: Kernel ABI header at 'tools/include/linux/coresight-pmu.h' differs from latest version at 'include/linux/coresight-pmu.h'
- tarpkg: ./tests/perf-targz-src-pkg .
                 make_static: cd . && make LDFLAGS=-static NO_PERF_READ_VDSO32=1 NO_PERF_READ_VDSOX32=1 NO_JVMTI=1 -j32  DESTDIR=/tmp/tmp.jqGYXdF9cQ
cd . && make LDFLAGS=-static NO_PERF_READ_VDSO32=1 NO_PERF_READ_VDSOX32=1 NO_JVMTI=1 -j32 DESTDIR=/tmp/tmp.jqGYXdF9cQ
  BUILD:   Doing 'make -j32' parallel build
  HOSTCC  fixdep.o
  HOSTLD  fixdep-in.o
  LINK    fixdep
Warning: Kernel ABI header at 'tools/include/uapi/linux/in.h' differs from latest version at 'include/uapi/linux/in.h'
diff -u tools/include/uapi/linux/in.h include/uapi/linux/in.h
Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' differs from latest version at 'arch/x86/include/asm/cpufeatures.h'
diff -u tools/arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/cpufeatures.h
Warning: Kernel ABI header at 'tools/arch/arm64/include/uapi/asm/perf_regs.h' differs from latest version at 'arch/arm64/include/uapi/asm/perf_regs.h'
diff -u tools/arch/arm64/include/uapi/asm/perf_regs.h arch/arm64/include/uapi/asm/perf_regs.h
Warning: Kernel ABI header at 'tools/include/linux/coresight-pmu.h' differs from latest version at 'include/linux/coresight-pmu.h'
diff -u tools/include/linux/coresight-pmu.h include/linux/coresight-pmu.h
Makefile.config:429: *** ERROR: No libelf found. Disables 'probe' tool, jvmti and BPF support. Please install libelf-dev, libelf-devel, elfutils-libelf-devel or build with NO_LIBELF=1..  Stop.
make[3]: *** [Makefile.perf:236: sub-make] Error 2
make[2]: *** [Makefile:70: all] Error 2
  test: test -x ./perf
make[1]: *** [tests/make:316: make_static] Error 1
make: *** [Makefile:103: build-test] Error 2

Same thing for the libtraceevent, I'll add NO_LIBTRACEEVENT=1 and NO_LIBELF=1 to the static build test in tools/perf/tests/make