The following is just a verbatim copy of
http://gcc.gnu.org/ml/gcc-help/2009-04/msg00023.html
For details and possible patch follow the link.
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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.
--
Summary: Missing -isystem include-fixed when building canadian
cross libgcc
Product: gcc
Version: 4.3.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: georgjohann at web dot de
GCC build triplet: i686-linux-gnu
GCC host triplet: i586-mingw32
GCC target triplet: any
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39622
