On Sat, Jun 25, 2022 at 11:34:38PM +0800, Zixuan Tan wrote:
> With OpenSSL v3 installed, the libcrypto feature check fails as it use the
> deprecated MD5_* API (and is compiled with -Werror). The error message is
> as follows.
>
> $ make tools/perf
> ```
> Makefile.config:778: No libcrypto.h found, disables jitted code injection,
> please install openssl-devel or libssl-dev
>
> Auto-detecting system features:
> ... dwarf: [ on ]
> ... dwarf_getlocations: [ on ]
> ... glibc: [ on ]
> ... libbfd: [ on ]
> ... libbfd-buildid: [ on ]
> ... libcap: [ on ]
> ... libelf: [ on ]
> ... libnuma: [ on ]
> ... numa_num_possible_cpus: [ on ]
> ... libperl: [ on ]
> ... libpython: [ on ]
> ... libcrypto: [ OFF ]
> ... libunwind: [ on ]
> ... libdw-dwarf-unwind: [ on ]
> ... zlib: [ on ]
> ... lzma: [ on ]
> ... get_cpuid: [ on ]
> ... bpf: [ on ]
> ... libaio: [ on ]
> ... libzstd: [ on ]
> ... disassembler-four-args: [ on ]
> ```
>
> This is very confusing because the suggested library (on my Ubuntu 20.04
> it is libssl-dev) is already installed. As the test only checks for the
> presence of libcrypto, this commit suppresses the deprecation warning to
> allow the test to pass.
>
> Signed-off-by: Zixuan Tan <tanzixuan.me@xxxxxxxxx>
> ---
> tools/build/feature/test-libcrypto.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/tools/build/feature/test-libcrypto.c b/tools/build/feature/test-libcrypto.c
> index a98174e0569c..31afff093d0b 100644
> --- a/tools/build/feature/test-libcrypto.c
> +++ b/tools/build/feature/test-libcrypto.c
> @@ -2,6 +2,12 @@
> #include <openssl/sha.h>
> #include <openssl/md5.h>
>
> +/*
> + * The MD5_* API have been deprecated since OpenSSL 3.0, which causes the
> + * feature test to fail silently. This is a workaround.
> + */
then we use these deprecated MD5 calls in util/genelf.c if libcrypto is detected,
so I wonder how come the rest of the compilation passed for you.. do you have
CONFIG_JITDUMP disabled?
thanks,
jirka
> +#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
> +
> int main(void)
> {
> MD5_CTX context;
> --
> 2.34.1
>
