http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47779
Summary: Problem cross-compiling trunk for bfin
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: bootstrap
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: stuart.hender...@analog.com
I'm seeing a failure cross-compiling trunk for Blackfin (bfin-uclinux) with
uClibc, and it doesn't appear to have worked for quite some time. My system is
x86_64-suse-linux, although that shouldn't be relevant in this case.
The first problem I'm seeing is when building unwind-dw2.c.
After installing target/uclibc headers for the sysroot, I configure gcc:
/home/shender/gnu/toolchain/gcc-4.6/configure --build=x86_64-unknown-linux-gnu
--host=x86_64-unknown-linux-gnu --target=bfin-uclinux
--prefix=/home/shender/gnu/toolchain/bfin-uclinux --disable-libstdcxx-pch
--with-sysroot=/home/shender/gnu/toolchain/bfin-uclinux/bfin-uclinux/runtime
--enable-threads=posix --enable-languages=c --disable-threads
--disable-libmudflap --disable-libgomp --disable-shared
--enable-clocale=generic --disable-symvers --disable-libssp --disable-libffi
--disable-libgcj --enable-version-specific-runtime-libs --enable-__cxa_atexit
and then make, which fails with:
/home/shender/gnu/toolchain/gcc_build-4.6/./gcc/xgcc
-B/home/shender/gnu/toolchain/gcc_build-4.6/./gcc/
-B/home/shender/gnu/toolchain/bfin-uclinux/bfin-uclinux/bin/
-B/home/shender/gnu/toolchain/bfin-uclinux/bfin-uclinux/lib/ -isystem
/home/shender/gnu/toolchain/bfin-uclinux/bfin-uclinux/include -isystem
/home/shender/gnu/toolchain/bfin-uclinux/bfin-uclinux/sys-include -g -O2
-mcpu=bf532-none -O2 -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall
-Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -isystem ./include -fpic -g -DIN_LIBGCC2
-D__GCC_FLOAT_NOT_NEEDED -fno-stack-protector -I. -I. -I../../.././gcc
-I/home/shender/gnu/toolchain/gcc-4.6/libgcc
-I/home/shender/gnu/toolchain/gcc-4.6/libgcc/.
-I/home/shender/gnu/toolchain/gcc-4.6/libgcc/../gcc
-I/home/shender/gnu/toolchain/gcc-4.6/libgcc/../include -DHAVE_CC_TLS
-DUSE_EMUTLS -o unwind-dw2.o -MT unwind-dw2.o -MD -MP -MF unwind-dw2.dep
-fexceptions -c /home/shender/gnu/toolchain/gcc-4.6/libgcc/../gcc/unwind-dw2.c
In file included from
/home/shender/gnu/toolchain/bfin-uclinux/bfin-uclinux/sys-include/ucontext.h:25:0,
from
/home/shender/gnu/toolchain/bfin-uclinux/bfin-uclinux/sys-include/signal.h:351,
from
/home/shender/gnu/toolchain/gcc-4.6/libgcc/../gcc/config/bfin/linux-unwind.h:31,
from
/home/shender/gnu/toolchain/gcc-4.6/libgcc/../gcc/unwind-dw2.c:333:
/home/shender/gnu/toolchain/bfin-uclinux/bfin-uclinux/sys-include/sys/ucontext.h:39:3:
error: expected identifier before numeric constant
make[4]: *** [unwind-dw2.o] Error 1
make[4]: Leaving directory
`/home/shender/gnu/toolchain/gcc_build-4.6/bfin-uclinux/bf532-none/libgcc'
make[3]: *** [multi-do] Error 1
make[3]: Leaving directory
`/home/shender/gnu/toolchain/gcc_build-4.6/bfin-uclinux/libgcc'
make[2]: *** [all-multi] Error 2
make[2]: Leaving directory
`/home/shender/gnu/toolchain/gcc_build-4.6/bfin-uclinux/libgcc'
make[1]: *** [all-target-libgcc] Error 2
make[1]: Leaving directory `/home/shender/gnu/toolchain/gcc_build-4.6'
make: *** [all] Error 2
The problem seems to be caused by a change in the generation of tm.h in the
following check in:
r160579 | rsandifo | 2010-06-10 21:23:43 +0100 (Thu, 10 Jun 2010) | 7 lines
gcc/
* configure.ac (tm_include_list): Add insn-constants.h.
* configure: Regenerate.
* Makefile.in (GTM_H): Move insn-constants.h here from...
(TM_H): ...here.
* mkconfig.sh: Remove special handling for insn-constants.h.
The change moves the inclusion of "insn-constants.h" from being conditional on:
#if defined IN_GCC && !defined GENERATOR_FILE && !defined USED_FOR_TARGET
to just:
#if defined IN_GCC
This causes insn-constants.h to be included here which defines various register
macros that can then clash with the enum (of registers in the gregset_t array)
in uClibc's sys/ucontext.h.
Although I've only hit this with bfin, it seems like it could easily hit other
architectures.
