libstdc++ doxygen build error

[Jonathan Wakely]

On Sun, 28 Mar 2021 at 17:00, SAIFI <saifi@strikr.io> wrote:
>
> Hi:
>
> while doing a doxygen build of libstdc++ the following error is seen.
>
> <snipped>
> ...
> Generating caller graph for function __pstl::__unseq_backend::__simd_count
> Generating caller graph for function __pstl::__unseq_backend::__simd_fill_n
> Generati../../../../../../src/gcc/libstdc++-v3/scripts/run_doxygen: line 183: 227779 Segmentation fault      (core dumped) doxygen ${outdir}/${mode}.cf
> make[3]: [Makefile:933: stamp-html-doxygen] Error 139 (ignored)
> echo timestamp > stamp-html-doxygen
> echo timestamp > stamp-html
> make[3]: Leaving directory '/strikr/infra/build/gcc/x86_64-pc-linux-gnu/libstdc++-v3/doc'
> make[2]: Leaving directory '/strikr/infra/build/gcc/x86_64-pc-linux-gnu/libstdc++-v3'
>
>
> here is the background,
>
>
> 0. configure step for the doxygen build
>
> DIR_SRC_LIBSTDCXX=../../../src/gcc/libstdc++-v3
> DIR_DST_LIBSTDCXX=/opt/gcc
>
> ${DIR_SRC_LIBSTDCXX}/configure                        \
>            --prefix=${DIR_DST_LIBSTDCXX}               \
>            --datadir=${DIR_DST_LIBSTDCXX}/share        \
>            --htmldir=${DIR_DST_LIBSTDCXX}/share        \
>            --disable-multilib
>
>
> 1. make step
>
> make doc-html-doxygen
>
>
> doxygen 1.9.1-1 is being used for the build, if that helps.
>
> Has anyone encountered this ? Any work around ? Any tweaks one can make in user.config.in ?

It works for me using doxygen 1.8.20, so maybe it's a bug in the new
doxygen release, or maybe doxygen is running out of memory while
building the docs.

You could try modifying user.config.in so that the
experimentall/bits/simd* headers are not processed, in case that's
where it's crashing.