On 01/08/2020 11:28 PM, Miro Hrončok wrote:
> On 08. 01. 20 23:47, Tom Stellard wrote:
>> I suspect that if I can find some way to set the CC and CXX environment
>> variables for all builds, not just ones using autoconf, cmake or meson,
>> that might help cut down on the number of packages that still use gcc.
>> I'm just not quite sure how to implement this yet, but I'm looking into
>> it.
>
> /usr/lib/rpm/macros has:
>
> %___build_pre \
> RPM_SOURCE_DIR=\"%{u2p:%{_sourcedir}}\"\
> RPM_BUILD_DIR=\"%{u2p:%{_builddir}}\"\
> RPM_OPT_FLAGS=\"%{optflags}\"\
> RPM_LD_FLAGS=\"%{?build_ldflags}\"\
> RPM_ARCH=\"%{_arch}\"\
> RPM_OS=\"%{_os}\"\
> RPM_BUILD_NCPUS=\"%{_smp_build_ncpus}\"\
> export RPM_SOURCE_DIR RPM_BUILD_DIR RPM_OPT_FLAGS RPM_LD_FLAGS RPM_ARCH RPM_OS RPM_BUILD_NCPUS RPM_LD_FLAGS\
> RPM_DOC_DIR=\"%{_docdir}\"\
> export RPM_DOC_DIR\
> RPM_PACKAGE_NAME=\"%{NAME}\"\
> RPM_PACKAGE_VERSION=\"%{VERSION}\"\
> RPM_PACKAGE_RELEASE=\"%{RELEASE}\"\
> export RPM_PACKAGE_NAME RPM_PACKAGE_VERSION RPM_PACKAGE_RELEASE\
> LANG=C\
> export LANG\
> unset CDPATH DISPLAY ||:\
> %{?buildroot:RPM_BUILD_ROOT=\"%{u2p:%{buildroot}}\"\
> export RPM_BUILD_ROOT}\
> %{?_javaclasspath:CLASSPATH=\"%{_javaclasspath}\"\
> export CLASSPATH}\
>
> PKG_CONFIG_PATH=\"${PKG_CONFIG_PATH}:%{_libdir}/pkgconfig:%{_datadir}/pkgconfig\"\
> export PKG_CONFIG_PATH\
> CONFIG_SITE=${CONFIG_SITE:-NONE}\
> export CONFIG_SITE\
> \
> %{verbose:set -x}\
> umask 022\
> cd \"%{u2p:%{_builddir}}\"\
>
>
> You should b able to expand (redefine anywhere else) this macro to set the variables you need or call %set_build_flags.
>
I did another mass rebuild, this time setting the CC and CXX environment variables
in __build_pre as you suggested. The numbers look a little better now:
Packages Built: 4271
Built with clang: 3355
Built with gcc: 916
cc or c++ was invoked by about 50 packages.
-Tom
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