llvm dev - May 2009 - [LLVMdev] Using non-system compiler to build llvm and llvm-gcc front end

Thanks for the suggestions. It looks like Duncan's suggestion got me a
step closer, but I still can't build llvm-gcc...

On Tue, May 5, 2009 at 12:56 AM, Christian Sayer
<Christian.Sayer at dibcom.fr> wrote:
> did you try a simple
>
>  $ ../llvm-2.5/configure --prefix=/pkg/bin/llvm/
> CC=/pkg/bin/gcc-4.2.4/bin/gcc CXX=/pkg/bin/gcc-4.2.4/bin/g++
Tried that, same error.

2009/5/5 Duncan Sands <baldrick at free.fr>:
> how about:
>
> export PATH=/pkg/bin/:$PATH
> ../llvm-2.5/configure --prefix=/pkg/bin/llvm/
>
> instead?
I did that, and then "make tools-only" -- which resulted in a
successful build of llvm-2.5. Then I went to build llvm-gcc:

../llvm-gcc4.2-2.5.source/configure
--prefix=/pkg/build/llvm/llvm-gcc/install --program-prefix=llvm-
--enable-llvm=/pkg/build/llvm/llvm-obj/ --enable-languages=c,c++

make LLVM_VERSION_INFO=2.5

and I get this error (which, according to
http://www.mail-archive.com/llvmbugs at cs.uiuc.edu/msg02575.html might
mean I am using a bad version of gcc)...

/pkg/build/llvm/llvm-gcc/obj/./gcc/xgcc
-B/pkg/build/llvm/llvm-gcc/obj/./gcc/
-B/pkg/build/llvm/llvm-gcc/install/x86_64-unknown-linux-gnu/bin/
-B/pkg/build/llvm/llvm-gcc/install/x86_64-unknown-linux-gnu/lib/
-isystem /pkg/build/llvm/llvm-gcc/install/x86_64-unknown-linux-gnu/include
-isystem /pkg/build/llvm/llvm-gcc/install/x86_64-unknown-linux-gnu/sys-include
 -O2  -O2 -g -O2  -DIN_GCC    -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../../llvm-gcc4.2-2.5.source/gcc
-I../../llvm-gcc4.2-2.5.source/gcc/.
-I../../llvm-gcc4.2-2.5.source/gcc/../include
-I../../llvm-gcc4.2-2.5.source/gcc/../libcpp/include
-I../../llvm-gcc4.2-2.5.source/gcc/../libdecnumber -I../libdecnumber
-I/pkg/build/llvm/llvm-obj//include -I/pkg/build/llvm/llvm-2.5/include
 -DL_gcov -c ../../llvm-gcc4.2-2.5.source/gcc/libgcov.c -o
libgcc/./_gcov.o
cc1: /pkg/build/llvm/llvm-2.5/include/llvm/Transforms/Utils/InlineCost.h:44:
llvm::InlineCost::InlineCost(int, int): Assertion `Cost == C &&
"Cost
exceeds InlineCost precision"' failed.
../../llvm-gcc4.2-2.5.source/gcc/libgcov.c:644: internal compiler error: Aborted

So I tried this config for llvm-gcc:

$ ../llvm-gcc4.2-2.5.source/configure
--prefix=/pkg/build/llvm/llvm-gcc/install --program-prefix=llvm-
--enable-llvm=/pkg/build/llvm/llvm-obj/ --enable-languages=c,c++
CC=/pkg/bin/gcc-4.2.4/bin/gcc CXX=/pkg/bin/gcc-4.2.4/bin/g++

but got:

configure: warning: CC=/pkg/bin/gcc-4.2.4/bin/gcc: invalid host type
configure: warning: CXX=/pkg/bin/gcc-4.2.4/bin/g++: invalid host type
configure: error: can only configure for one host and one target at a time

How do I tell llvm-gcc config to use the right version of gcc?
/pkg/bin/ is in my path thanks to the suggestion from Duncan.

$ echo $PATH
/pkg/bin/:/usr/lib64/qt-3.3/bin:/usr/kerberos/bin:/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/user_homes/sricketts/bin

Hi,
> cc1:
/pkg/build/llvm/llvm-2.5/include/llvm/Transforms/Utils/InlineCost.h:44:
> llvm::InlineCost::InlineCost(int, int): Assertion `Cost == C &&
"Cost
> exceeds InlineCost precision"' failed.
> ../../llvm-gcc4.2-2.5.source/gcc/libgcov.c:644: internal compiler error:
Aborted
this is indeed a miscompilation by your system compiler.  However so many
compilers miscompiled this that a workaround was committed to svn.  So you
may want to check out llvm and llvm-gcc from svn.  Alternatively, maybe
the patch applies to llvm 2.5 too.  I've attached it.


Ciao,

Duncan.
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On Tue, May 5, 2009 at 12:26 PM, Duncan Sands <baldrick at free.fr>
wrote:
> this is indeed a miscompilation by your system compiler.  However so many
> compilers miscompiled this that a workaround was committed to svn.  So you
> may want to check out llvm and llvm-gcc from svn.  Alternatively, maybe
> the patch applies to llvm 2.5 too.  I've attached it.
I will try the latest from svn... but quick follow up question: If it
looks like a miscompilation by my system compiler (gcc 4.1.2), why
wasn't gcc-4.2.4 used? Did I make a mistake in configuration? Maybe I
am misunderstanding the build process.

Scott