I'm writing a little self-educational project. It has to do with Clang and LLVM internals hacking.
But while I was investigating the code base and reading documentation, strange things were going on with the build process.
What I am trying to do for starters is to build LLVM and Clang for SPARC target. But this rather simple task turns out to be quiet challenging.
I use sources from the stable release 3.4.2 and folder tree looks like that:
llvm/
...
projects/
...
test-suite <-- test-suite-3.4.src.tar.gz extracted here
tools/
...
clang/ <-- cfe-3.4.2.src.tar.gz extracted here
....
tools/
....
extra <-- clang-tools-extra-3.4.src.tar.gz extracted here
And from the intermediate folder (which lays on the same level as llvm) I call the following:
../llvm/configure --disable-optimized --enable-targets=sparc \
--prefix=/home/wf34/projects/helloClang/built
Surprisingly, resulting clang and llvm cannot deal with SPARC arch.
../built/bin/clang file2.c -S --target=sparc-unknown-linux -emit-llvm -o -
Gives (amongst the others) following line:
clang: warning: unknown platform, assuming -mfloat-abi=soft
Result is the same, if I write just --target=sparc.
Finally, attaching result of the llc --version:
LLVM (http://llvm.org/):
LLVM version 3.3
Optimized build.
Default target: x86_64-pc-linux-gnu
Host CPU: corei7-avx
Registered Targets:
cpp - C++ backend
x86 - 32-bit X86: Pentium-Pro and above
x86-64 - 64-bit X86: EM64T and AMD64
Thank you for your insight and ideas!
Edit Actually, having all that written, I have a guess that maybe I might have been mistaken while getting and untaring and setting the source from stable release. Maybe I would be better off following manual steps directly and getting source from svn trunk. I will fall back to that option if I won't receive any more meaningful suggestion.
