Hi!
This is my new attempt to clean up the different cross compiler
configurations. It turned out to be a very complicated matter,
so I thought it would be better to postpone it to the stage1.
In a canadian cross compiler setup we have a different header dir path
for use in the build and later on the target, which is written to
install-tools/mkheaders.conf, so I propose to export SYSTEM_HEADER_DIR
and BUILD_SYSTEM_HEADER_DIR from configure.ac to be used in Makefile.in.
I also removed unnecessary handling of --with-headers, because
the headers are copied to sys-include and thus it is not necessary to
use the original path here.
If --with-sysroot or --with-build-sysroot is used the SYSTEM_HEADER_DIR
or BUILD_SYSTEM_HEADER_DIR contain $${sysroot_headers_suffix},
which is normally an empty string, but on mips it may be something
like "mips-r2" which gets appended to the sysroot for use of fixincludes
but "target_header_dir" which is used in configure to find things like
the GLIBC version it is not used. I assume that that either does
not create problems and is silently ignored, or that people have a
work around, my patch should not change that, however I have not been
able to setup a sysroot for mips*-img-linux* or mips*-mti-linux* which
seem to be the only targets where this might make a difference.
I have tested all different combinations of --with-sysroot /
--with-build-sysroot. Even a native build with --with-sysroot works.
Except go of course: cross-builds are a no-go area for the go language
in general;)
As before I would appreciate your kind help with testing the many
different build setups.
So far I have tested native x86_64-pc-linux-gnu and arm-linux-gnueabihf
cross build configurations. And everything looks sane.
Is it OK for trunk?
Thanks
Bernd.
fixinc.diff
2017-04-18 Bernd Edlinger<bernd.edlinger@hotmail.de>
* configure.ac (SYSTEM_HEADER_DIR, BUILD_SYSTEM_HEADER_DIR,
target_header_dir): Set correctly.
* configure: Regenerated.
* Makefile.in (BUILD_SYSTEM_HEADER_DIR): New make variabe.
(LIMITS_H_TEST, if_multiarch, stmp-fixinc): Use BUILD_SYSTEM_HEADER_DIR
instead of SYSTEM_HEADER_DIR.