#166 dynamic libs/ L2 gen error

[R. Clint Whaley]

Problem can be demonstrated on tony2. Configure with --shared results in:

ld: libatlas.a(ATL_dger2k__900004.o): relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC
libatlas.a(ATL_dger2k__900004.o): could not read symbols: Bad value

Need to track this down.

[R. Clint Whaley]

Remember that this tracker item:
https://sourceforge.net/tracker/index.php?func=detail&aid=3133692&group_id=23725&atid=379483
is waiting for the answer to this problem.

[R. Clint Whaley]

The problem comes when the arch defs specify flags. In this case, the -fPIC is not added to those kernels that had their flags specified. Easiest fix for now is to not use the arch defs.

[R. Clint Whaley]

shell script to update arch defs

[R. Clint Whaley]

OK, here is a workaround until I have time for a better fix:
(1) Save the attached addpic.sh to the machine in which you wish to install shared libs while using arch defs
(2) Do configure with --shared as normal, but don't start build yet
(3) Scope your generated Make.inc file, and see what ARCH is set to (eg., Corei264AVX) whatever this string is, substitute it for $ARCH in the below instructions
(4) In your ATLAS SRC directory:
cd ATLAS/CONFIG/ARCHS
/path/to/addpic.sh $ARCH
(5) Now go back to build directory, and start the build.

Please let me know if this works for you.

[Alex Leach]

Hi,
First, sorry if this is the wrong place to post... I've been having problems compiling shared atlas libraries on Mac OS X 10.6.6 (Mac Pro Xeon).
I followed the instructions posted here yesterday, downloaded the addpic.sh script, ran it, and still get the same error.
Any help would be really appreciated!!
The steps I took after extracting atlas:-
cd ATLAS
mkdir build && cd build
../configure -Ss flapack $HOME/Downloads/sources/lapack-3.3.0/SRC/ -Si latune 1 -Fa alg -fPIC --shared
# Found the arch in build/Make.inc (Corei764SSE3)
# download addpic.sh to ATLAS/SRC/
cd ../CONFIG/ARCHS
sh ../../addpic.sh Corei764SSE3
cd ../../build/
make
make check
make ptcheck
make time
cd lib
make shared # which ends in this error:-

ld: unknown option: -melf_x86_64
make[2]: *** [LDTRY] Error 1
ld -melf_x86_64 -shared -soname /usr/local/atlas/lib/libsatlas.so -o libsatlas.so \
-rpath-link /usr/local/atlas/lib \
--whole-archive liblapack.a libf77blas.a libcblas.a libatlas.a --no-whole-archive -lpthread -lm
ld: unknown option: -melf_x86_64
make[2]: *** [LDTRY] Error 1
gcc -fPIC -force_cpusubtype_ALL -m64 -fPIC -shared -o libsatlas.so -Wl,"rpath-link /usr/local/atlas/lib" \
-Wl,--whole-archive liblapack.a libf77blas.a libcblas.a libatlas.a -Wl,--no-whole-archive -lpthread -lm
ld: file not found: rpath-link /usr/local/atlas/lib
collect2: ld returned 1 exit status
make[2]: *** [GCCTRY] Error 1
make[1]: *** [TRYALL] Error 2
make: *** [fat_shared] Error 2

[R. Clint Whaley]

OK, the above error should be fixed in 3.9.41. However, other errors my crop up: I haven't debugged the OS X shared lib build process in a while.

I'm closing this report, open up a new one if you get errors with 3.9.41.

Thanks!
Clint