Re: [PATCH v3] tools build: Check libasan and libubsan in Makefile.feature

[Jiri Olsa <jolsa@redhat.com>]

On Wed, Jun 17, 2020 at 10:27:01AM +0800, Tiezhu Yang wrote:
> When build perf with ASan or UBSan, if libasan or libubsan can not find,
> the feature-glibc is 0 and there exists the following error log which is
> wrong, because we can find gnu/libc-version.h in /usr/include, glibc-devel
> is also installed.
> 
> [yangtiezhu@linux perf]$ make DEBUG=1 EXTRA_CFLAGS='-fno-omit-frame-pointer -fsanitize=address'
>   BUILD:   Doing 'make -j4' parallel build
>   HOSTCC   fixdep.o
>   HOSTLD   fixdep-in.o
>   LINK     fixdep
> <stdin>:1:0: warning: -fsanitize=address and -fsanitize=kernel-address are not supported for this target
> <stdin>:1:0: warning: -fsanitize=address not supported for this target
> 
> Auto-detecting system features:
> ...                         dwarf: [ OFF ]
> ...            dwarf_getlocations: [ OFF ]
> ...                         glibc: [ OFF ]
> ...                          gtk2: [ OFF ]
> ...                      libaudit: [ OFF ]
> ...                        libbfd: [ OFF ]
> ...                        libcap: [ OFF ]
> ...                        libelf: [ OFF ]
> ...                       libnuma: [ OFF ]
> ...        numa_num_possible_cpus: [ OFF ]
> ...                       libperl: [ OFF ]
> ...                     libpython: [ OFF ]
> ...                     libcrypto: [ OFF ]
> ...                     libunwind: [ OFF ]
> ...            libdw-dwarf-unwind: [ OFF ]
> ...                          zlib: [ OFF ]
> ...                          lzma: [ OFF ]
> ...                     get_cpuid: [ OFF ]
> ...                           bpf: [ OFF ]
> ...                        libaio: [ OFF ]
> ...                       libzstd: [ OFF ]
> ...        disassembler-four-args: [ OFF ]
> 
> Makefile.config:393: *** No gnu/libc-version.h found, please install glibc-dev[el].  Stop.
> Makefile.perf:224: recipe for target 'sub-make' failed
> make[1]: *** [sub-make] Error 2
> Makefile:69: recipe for target 'all' failed
> make: *** [all] Error 2
> [yangtiezhu@linux perf]$ ls /usr/include/gnu/libc-version.h
> /usr/include/gnu/libc-version.h
> 
> After install libasan and libubsan, the feature-glibc is 1 and the build
> process is success, so the cause is related with libasan or libubsan, we
> should check them and print an error log to reflect the reality.
> 
> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
> ---
> 
> v2:
>   - Check libasan and libubsan in tools/build/Makefile.feature
>   - Modify the patch subject
> 
> v3:
>   - Check EXTRA_CFLAGS first
> 
>  tools/build/Makefile.feature | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
> index cb15237..bc28dc9 100644
> --- a/tools/build/Makefile.feature
> +++ b/tools/build/Makefile.feature
> @@ -250,3 +250,15 @@ ifeq ($(feature_verbose),1)
>    $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
>    $(info )
>  endif
> +
> +ifneq ($(filter s% -fsanitize=address%,$(EXTRA_CFLAGS),),)
> +  ifneq ($(shell ldconfig -p | grep libasan >/dev/null 2>&1; echo $$?), 0)
> +    msg := $(error No libasan found, please install libasan);
> +  endif
> +endif
> +
> +ifneq ($(filter s% -fsanitize=undefined%,$(EXTRA_CFLAGS),),)
> +  ifneq ($(shell ldconfig -p | grep libubsan >/dev/null 2>&1; echo $$?), 0)
> +    msg := $(error No libubsan found, please install libubsan);
> +  endif
> +endif

sry, I made uninformed guess when I replied to your first patch,
I checked on libasan/libubsan and they don't have devel headers

so I think the check above should be in Makefile.config together
with the EXTRA_CFLAGS check for -fsanitize options as you have above

thanks,
jirka