[Buildroot] [PATCH] gcc: Add option to build final-gcc with sysroot option
Peter Korsgaard
jacmet at sunsite.dk
Fri Nov 27 14:51:02 UTC 2009
>>>>> "Carmelo" == Carmelo AMOROSO <carmelo.amoroso at st.com> writes:
Hi,
Thanks for the patch.
Carmelo> Add gcc config option BR2_GCC_FINAL_NEEDS_SYSROOT to build cross gcc
Carmelo> (final stage) with --with-sysroot option.
Carmelo> This is required to allow libgcc to use the correct the correct unwind
Carmelo> functions implementation with NPTL.
Carmelo> Indeed, if sysroot is not used, the inhibit_libc macro is defined
Carmelo> for the LIBGCC2_CFLAGS (see gcc/configure)
Carmelo> inhibit_libc=false
Carmelo> if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
Carmelo> test x$with_newlib = xyes ; } &&
Carmelo> { test "x$with_headers" = x || test "x$with_headers" = xno ; } ; then
Carmelo> inhibit_libc=true
Carmelo> fi
Carmelo> If inhibit_libc is defined, the actual implementation of unwind functions
Carmelo> are taken from unwind-dw2-fde-c instead of the correct unwind-dw2-fde-glibc.c
Carmelo> as required for NPTL case.
<cut>
Carmelo> +config BR2_GCC_FINAL_NEEDS_SYSROOT
Carmelo> + bool "Gcc (final stage) needs sysroot to be set"
Carmelo> + default n
Carmelo> + help
Carmelo> + If enabled, gcc (final stage) will be configured with --with-sysroot
Carmelo> + set to $(STAGING_DIR) where uClibc runtime system has been installed.
Carmelo> + This is required for building a toolchain working with uClibc NPTL.
Carmelo> +
I'm not convinced we need a user visible option for this - It's a very
lowlevel detail that I don't think most users will know what to answer
to - Any reason we cannot just automatically enable this if
BR2_PTHREADS_NATIVE is enabled?
--
Bye, Peter Korsgaard
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