[Buildroot] [autobuild.buildroot.net] Daily results for 2019-09-17

[Peter Seiderer]

Hello,

On Wed, 18 Sep 2019 06:16:20 -0000, Thomas Petazzoni <thomas.petazzoni at bootlin.com> wrote:

[...]
> 
> Results for branch 'master'
> ===========================
[...]

>    x86_64    |           ffmpeg-4.2           | NOK | http://autobuild.buildroot.net/results/061fd3cd6e29c86f49ebfe47b4abb7497ee17fa5 |     

The ffmpeg configure step fails with:

 ERROR: gnutls not found using pkg-config

From build/ffmpeg-4.2/ffbuild/config.log:

 .../host/bin/../x86_64-buildroot-linux-gnu/sysroot/usr/lib/libgnutls.so: undefined reference to `__get_cpuid_count'

From build/gnutls-3.6.9/lib/accelerated/x86/x86-common.c:

 41 #ifdef HAVE_CPUID_H
 42 # include <cpuid.h>
 43 #else
 44 # define __get_cpuid(...) 0
 45 # define __get_cpuid_count(...) 0
 46 #endif

The given toolchain cpuid.h file is missing the get_cpuid_count definition (for
an cpuid.h file with it see e.g. [1])...

The gnutls search for cpuid.h can be disabled by the
'--disable-hardware-acceleration' configure option, so the build could
be fixed by the following patch:

--- a/package/gnutls/gnutls.mk
+++ b/package/gnutls/gnutls.mk
@@ -27,7 +27,8 @@ GNUTLS_CONF_OPTS = \
        --with-librt-prefix=$(STAGING_DIR) \
        --without-tpm \
        $(if $(BR2_PACKAGE_GNUTLS_OPENSSL),--enable,--disable)-openssl-compatibility \
-       $(if $(BR2_PACKAGE_GNUTLS_TOOLS),--enable-tools,--disable-tools)
+       $(if $(BR2_PACKAGE_GNUTLS_TOOLS),--enable-tools,--disable-tools) \
+       --disable-hardware-acceleration
 GNUTLS_CONF_ENV = gl_cv_socket_ipv6=yes \
        ac_cv_header_wchar_h=$(if $(BR2_USE_WCHAR),yes,no) \
        gt_cv_c_wchar_t=$(if $(BR2_USE_WCHAR),yes,no) \


Unconditionally disabling hardware acceleration seems to be overkill, but
did not spot the right condition (yet)...

Or alternatively patch configure to check not only for cpuid.h header,
but although check for __get_cpuid/__get_cpuid_count presence...

Regards,
Peter

[1] https://github.com/gcc-mirror/gcc/blob/master/gcc/config/i386/cpuid.h