On Mon, Jan 22, 2018 at 09:37:05AM +0100, Richard Biener wrote:
>
> Currently gcc_release builds GCC (for generating in-tree generated
> files) serially - that's prohibitly expensive and takges ages (>4h for
> me). I'm using (when I remember to edit gcc_release ...) -j6 without
> a problem for some years, thus the following proposal.
>
> Any recommendation for the default N? 4 might work just fine as well
> and no release manager should do without at least 4 cores...
Perhaps
num_cpus=1
if type -p getconf 2>/dev/null; then
num_cpus=`getconf _NPROCESSORS_ONLN 2>/dev/null`
case "$num_cpus" in
'' | 0* | *[!0-9]*) num_cpus=1;;
esac
fi
and "-j$num_cpus" ?
> 2018-01-22 Richard Biener <rguent...@suse.de>
>
> maintainer-scripts/
> * gcc_release (build_sources): Pass -m "-j1" to gcc_build.
>
> Index: maintainer-scripts/gcc_release
> ===================================================================
> --- maintainer-scripts/gcc_release (revision 256939)
> +++ maintainer-scripts/gcc_release (working copy)
> @@ -210,7 +210,8 @@ EOF
> inform "Building compiler"
> OBJECT_DIRECTORY=../objdir
> contrib/gcc_build -d ${SOURCE_DIRECTORY} -o ${OBJECT_DIRECTORY} \
> - -c "--enable-generated-files-in-srcdir --disable-multilib" build || \
> + -c "--enable-generated-files-in-srcdir --disable-multilib" \
> + -m "-j1" build || \
> error "Could not rebuild GCC"
> fi
>
Jakub
