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Missing -isystem include-fixed when building canadian cross libgcc
- From: Georg-Johann Lay <avr at gjlay dot de>
- To: gcc-help at gcc dot gnu dot org
- Date: Thu, 02 Apr 2009 17:33:39 +0200
- Subject: Missing -isystem include-fixed when building canadian cross libgcc
Hi,
I'd like to build a canadian cross configured with
--host=i586-mingw32
--build=i686-linux-gnu
Everything goes fine except building libgcc because limits.h cannot be
found, as include-fixed is not in include path.
The problem looks like this: For a native build, i.e. host=build,
libgcc/Makefile sets CC to
> CC = [target-gcc-build-dir]/./gcc/xgcc -B[target-gcc-build-dir]/./gcc/
but for host != build it is
> CC = [target-gcc]
without adding [target-gcc-build-dir]/./gcc/include-fixed
to the include directory search path my means of -isystem.
However, this directory contains the limits.h.
I fixed the problem as indicated in the diff attached by adding the
include-fixed to GCC's configure.
Is that the right way to fix that?
Thanks for any hints,
Georg-Johann
Index: configure
===================================================================
--- configure (revision 36)
+++ configure (working copy)
@@ -5832,7 +5832,7 @@ case " $target_configdirs " in
# to it. This is right: we don't want to search that directory
# for binaries, but we want the header files in there, so add
# them explicitly.
- FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include'
+ FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
# Someone might think of using the pre-installed headers on
# Canadian crosses, in case the installed compiler is not fully