Cross-compile llvm-gcc Linux x86 to arm-linux

[llvmbot]

Bugzilla Link	3502
Resolution	FIXED
Resolved on	Apr 17, 2009 11:20
Version	trunk
OS	Linux
Attachments	Revert some of 54175 to help ARM cross-compiler build, Preprocessed source that the "xgcc" executable chokes on.
Reporter	LLVM Bugzilla Contributor
CC	@asl

Extended Description

Hi all,

I'm quite new to this, so hopefully this is a real bug and not my fault :)

I'm trying to compile cross-compile llvm-gcc trunk for arm-linux from my Kubuntu 8.04 x86 Linux install, and have run into many build errors, including what appears to be an internal compiler error.

Firstly, the commit:

http://llvm.org/viewvc/llvm-project/llvm-gcc-4.2/trunk/gcc/config/arm/arm.h?r1=54175&r2=54174&pathrev=54175

seems to have removed some stuff necessary for arm.c and arm.md to compile on a non-Darwin host - in particular, the definitions of MACHO_DYNAMIC_NO_PIC_P, ENCODED_SHORT_CALL_ATTR_P and ENCODED_LONG_CALL_ATTR_P. Reverting some of these changes allows us to proceed (see attached patch).

After that, I ./configure llvm-gcc trunk from an obj/ subdir as follows (the full path to this obj/ dir is /home/kde4daily/tmp/funkytown-sdl/llvm-arm/src/llvm-gcc/obj/./gcc/xgcc) :

./configure --prefix=/home/kde4daily/tmp/funkytown-sdl/llvm-arm/install --enable-languages=c,c++ --enable-checking --disable-bootstrap --disable-multilib --target=arm-linux --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --with-build-sysroot=/home/kde4daily/tmp/funkytown-sdl/llvm-arm/install/ --with-llvm=$LLVMOBJDIR

(the same configuration, passed to stock gcc 4.2, leads to a successful cross compilation, so I think this is llvm-gcc-specific).

Running make eventually descends into /home/kde4daily/tmp/funkytown-sdl/llvm-arm/src/llvm-gcc/obj/gcc/ and tries to run the "xgcc" executable that has been created on crtstuff.c and an internal compiler error is generated. After getting the preprocessed stuff and ditching all the -I and -D flags, I've reduced the call to the relatively self-contained:

/home/kde4daily/tmp/funkytown-sdl/llvm-arm/src/llvm-gcc/obj/./gcc/xgcc -B/home/kde4daily/tmp/funkytown-sdl/llvm-arm/src/llvm-gcc/obj/./gcc/ -g -O2 -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -g0 -finhibit-size-directive -fno-inline-functions -fno-exceptions -fno-zero-initialized-in-bss -fno-toplevel-reorder -fPIC -c crtstuff-preprocessed.c -o crtbeginS.o

(crtstuff-preprocessed.c is attached) and the following error is produced:

../../gcc/crtstuff.c: In function ‘__do_global_dtors_aux’: ../../gcc/crtstuff.c:334: internal compiler error: in mark_jump_label, at jump.c:1144 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://developer.apple.com/bugreporter> for instructions.

The corresponding call, adapted for cross-compilation of the stock gcc 4.2, works without incident.

If you need any more info, please let me know :)

[llvmbot]

Yes. Thanks.

[llvmbot]

So it's fixed, right?

[llvmbot]

Looks like fix for pr3954 has fixed this problem as well.

[llvmbot]

crtbegin.bc

[llvmbot]

This bug comes to life again during compilation of llvm-gcc-4.2! Sorry.

svn version : 67763

/build/x86_64-arm/llvm-gcc-4.2/./gcc/xgcc -B/build/x86_64-arm/llvm-gcc-4.2/./gcc/ -B/install/x86_64-arm/llvm-gcc-4.2/arm-none-linux-gnueabi/bin/ -B/install/x86_64-arm/llvm-gcc-4.2/arm-none-linux-gnueabi/lib/ -isystem /install/x86_64-arm/llvm-gcc-4.2/arm-none-linux-gnueabi/include -isystem /install/x86_64-arm/llvm-gcc-4.2/arm-none-linux-gnueabi/sys-include -O2 -O2 -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -I. -I. -I../../../../src/llvm-gcc-4.2/gcc -I../../../../src/llvm-gcc-4.2/gcc/. -I../../../../src/llvm-gcc-4.2/gcc/../include -I../../../../src/llvm-gcc-4.2/gcc/../libcpp/include -I../../../../src/llvm-gcc-4.2/gcc/../libdecnumber -I../libdecnumber -I/install/x86_64-arm/llvm/include -I/src/llvm/include -g0 -finhibit-size-directive -fno-inline-functions -fno-exceptions -fno-zero-initialized-in-bss -fno-toplevel-reorder -c ../../../../src/llvm-gcc-4.2/gcc/crtstuff.c -DCRT_BEGIN -o crtbegin.o cc1: /src/llvm/lib/CodeGen/RegisterScavenging.cpp:273: void llvm::RegScavenger::forward(): Assertion `(isReserved(Reg) || isUnused(Reg) || IsImpDef || isImplicitlyDefined(Reg) || isLiveInButUnusedBefore(Reg, MI, MBB, TRI, MRI)) && "Re-defining a live register!"' failed. ../../../../src/llvm-gcc-4.2/gcc/crtstuff.c:382: internal compiler error: Aborted I'm attaching the bitcode - called crtbegin.bc.

[llvmbot]

Fixed. http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090216/074104.html

[llvmbot]

I encountered the assertion failure while compiling my project using llvm based x86_64->ARM cross compiler. I attached is a simplified versions of .bc and .ll.

Thanks.

[llvmbot]

bugpoint-simple.bc

[llvmbot]

bugpoint-simplified.ll code

[llvmbot]

Both test cases should have been fixed by r64745. Please check.

[llvmbot]

bit code of libgcc2.c I also get the following assertion failure during my attempt to build an x86_64->ARM cross compiler.

/./gcc/xgcc -B/./gcc/ -B/arm-none-linux-gnueabi/bin/ -B/arm-none-linux-gnueabi/lib/ -isystem /arm-none-linux-gnueabi/include -isystem /arm-none-linux-gnueabi/sys-include -O2 -O2 -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I. -I. -I/gcc -I/gcc/. -I/gcc/../include -I/gcc/../libcpp/include -I/gcc/../libdecnumber -I../libdecnumber -I/llvm/include -I/llvm/lib/CodeGen/RegisterScavenging.cpp:273: void llvm::RegScavenger::forward(): Assertion `(isReserved(Reg) || isUnused(Reg) || IsImpDef || isImplicitlyDefined(Reg) || isLiveInButUnusedBefore(Reg, MI, MBB, TRI, MRI)) && "Re-defining a live register!"' failed. ../../../../src/llvm-gcc-4.2/gcc/libgcc2.c:1914: internal compiler error: Aborted Please submit a full bug report, with preprocessed source if appropriate. See for instructions. Here is some relevant info: LLVM and llvm-gcc-4.2 source rev 64487 $ svn info Path: . URL: http://llvm.org/svn/llvm-project/llvm/trunk Repository Root: http://llvm.org/svn/llvm-project Repository UUID: 91177308-0d34-0410-b5e6-96231b3b80d8 Revision: 64487 Node Kind: directory Schedule: normal Last Changed Author: djg Last Changed Rev: 64468 Last Changed Date: 2009-02-13 12:45:12 -0500 (Fri, 13 Feb 2009) $ svn info Path: . URL: http://llvm.org/svn/llvm-project/llvm-gcc-4.2/trunk Repository Root: http://llvm.org/svn/llvm-project Repository UUID: 91177308-0d34-0410-b5e6-96231b3b80d8 Revision: 64487 Node Kind: directory Schedule: normal Last Changed Author: baldrick Last Changed Rev: 64234 Last Changed Date: 2009-02-10 15:43:26 -0500 (Tue, 10 Feb 2009) LLVM configured and successfully built as : /configure --with-llvmgccdir=/llvm-gcc-4.2 --enable-optimized --enable-jit --prefix=/configure --prefix=/llvm --disable-multilib --target=arm-none-linux-gnueabi --with-sysroot= --enable-languages=c,c++ Attached the result of passing -emit-llvm to the above failing command.

[llvmbot]

bitcode of regex.c Hi Evan,

Hopefully this is right :)

[llvmbot]

Can you attach a bitcode file? Just re-run xgcc ... -c with -emit-llvm. Thanks.

[llvmbot]

Pre-processed file that causes the internal error.

[llvmbot]

Reduced testcase; regex.i will be attached.

/home/kde4daily/tmp/funkytown-sdl/llvm-arm/src/llvm-gcc/obj/./gcc/xgcc -B/home/kde4daily/tmp/funkytown-sdl/llvm-arm/src/llvm-gcc/obj/./gcc/ -B/home/kde4daily/tmp/funkytown-sdl/llvm-arm/install/arm-linux/bin/ -B/home/kde4daily/tmp/funkytown-sdl/llvm-arm/install/arm-linux/lib/ -c -O2 -g -O2 -W -Wall -pedantic -Wwrite-strings -Wstrict-prototypes -Wc++-compat regex.i -o regex.o

[llvmbot]

Thanks Chris - I feel silly now (s/--with-llvm/--enable-llvm/) :)

That got me much further, and I ran into http://llvm.org/bugs/show_bug.cgi?id=896, so I had to add --disable-shared to the flags.

With the new flags:

../configure --prefix=/home/kde4daily/tmp/funkytown-sdl/llvm-arm/install --enable-languages=c,c++ --enable-checking --disable-bootstrap --disable-multilib --disable-shared --target=arm-linux --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --with-build-sysroot=/home/kde4daily/tmp/funkytown-sdl/llvm-arm/install/ --enable-llvm=$LLVMOBJDIR

I eventually run into:

Checking multilib configuration for libstdc++-v3... Checking multilib configuration for libiberty... make[2]: Entering directory /home/kde4daily/tmp/funkytown-sdl/llvm-arm/src/llvm-gcc/obj/arm-linux/libiberty' if [ x"" != x ]; then \ /home/kde4daily/tmp/funkytown-sdl/llvm-arm/src/llvm-gcc/obj/./gcc/xgcc -B/home/kde4daily/tmp/funkytown-sdl/llvm-arm/src/llvm-gcc/obj/./gcc/ -B/home/kde4daily/tmp/funkytown-sdl/llvm-arm/install/arm-linux/bin/ -B/home/kde4daily/tmp/funkytown-sdl/llvm-arm/install/arm-linux/lib/ -isystem /home/kde4daily/tmp/funkytown-sdl/llvm-arm/install/arm-linux/include -isystem /home/kde4daily/tmp/funkytown-sdl/llvm-arm/install/arm-linux/sys-include -c -DHAVE_CONFIG_H -O2 -g -O2 --sysroot=/home/kde4daily/tmp/funkytown-sdl/llvm-arm/install/ -I. -I../../../libiberty/../include -W -Wall -pedantic -Wwrite-strings -Wstrict-prototypes -Wc++-compat ../../../libiberty/regex.c -o pic/regex.o; \ else true; fi /home/kde4daily/tmp/funkytown-sdl/llvm-arm/src/llvm-gcc/obj/./gcc/xgcc -B/home/kde4daily/tmp/funkytown-sdl/llvm-arm/src/llvm-gcc/obj/./gcc/ -B/home/kde4daily/tmp/funkytown-sdl/llvm-arm/install/arm-linux/bin/ -B/home/kde4daily/tmp/funkytown-sdl/llvm-arm/install/arm-linux/lib/ -isystem /home/kde4daily/tmp/funkytown-sdl/llvm-arm/install/arm-linux/include -isystem /home/kde4daily/tmp/funkytown-sdl/llvm-arm/install/arm-linux/sys-include -c -DHAVE_CONFIG_H -O2 -g -O2 --sysroot=/home/kde4daily/tmp/funkytown-sdl/llvm-arm/install/ -I. -I../../../libiberty/../include -W -Wall -pedantic -Wwrite-strings -Wstrict-prototypes -Wc++-compat ../../../libiberty/regex.c -o regex.o cc1: /home/kde4daily/tmp/funkytown-sdl/llvm-arm/src/llvm/lib/CodeGen/RegisterScavenging.cpp:273: void llvm::RegScavenger::forward(): Assertion(isReserved(Reg) || isUnused(Reg) || IsImpDef || isImplicitlyDefined(Reg) || isLiveInButUnusedBefore(Reg, MI, MBB, TRI, MRI)) && "Re-defining a live register!"' failed. ../../../libiberty/regex.c:8126: internal compiler error: Aborted Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://developer.apple.com/bugreporter> for instructions. make[2]: *** [regex.o] Error 1

Should I file a separate report for this, and what information would be most useful to you guys?

[lattner]

If you are crashing in jump.c, then you have a non-llvm gcc. Make sure to pass --enable-llvm properly.

-Chris

[llvmbot]

This might be a piece of the puzzle: it seems to be the only significant difference between stock gcc 4.2's jump.c and llvm-gcc's:

http://llvm.org/viewvc/llvm-project/llvm-gcc-4.2/trunk/gcc/jump.c?r1=43927&r2=43926&pathrev=43927