Re: Issue on X86_64?

[Lorenzo Pesce <lpesce@uchicago.edu>]

>>> When you use gcc to build *your* libraries, *you* must compile
>>> with -fPIC.
>>
>> I already do that. The problem is with libgfortran.* not with my  
>> libraries!
>
> Now you tell me.  Have a look at the gcc build log to see if it really
> did compile some of the libgfortran sources without -fPIC.

Forgive me again, which is the file I should look for?
I am looking in  gcc-4.1.1/objdir and this is all I can find:

x86_64-unknown-linux-gnu/libgfortran/libtool:140:pic_flag=" -fPIC -DPIC"
x86_64-unknown-linux-gnu/libgfortran/config.cache: 
259:ac_cv_prog_cc_pic=${ac_cv_prog_cc_pic=' -fPIC -DPIC'}
x86_64-unknown-linux-gnu/libgfortran/config.log:175:ltconfig: 
687:checking that /home/lpesce/GCC/gcc-4.1.1/objdir/./gcc/xgcc PIC  
flag -fPIC -DPIC works.
x86_64-unknown-linux-gnu/libgfortran/config.log:176:ltconfig:697: / 
home/lpesce/GCC/gcc-4.1.1/objdir/./gcc/xgcc -B/home/lpesce/GCC/ 
gcc-4.1.1/objdir/./gcc/ -B/usr/local/x86_64-unknown-linux-gnu/bin/ -B/ 
usr/local/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/x86_64- 
unknown-linux-gnu/include -isystem /usr/local/x86_64-unknown-linux- 
gnu/sys-include -c -std=gnu99 -O2 -g -O2  -fPIC -DPIC -DPIC   
conftest.c 1>&5
x86_64-unknown-linux-gnu/libgfortran/config.log: 
5096:ac_cv_prog_cc_pic=' -fPIC -DPIC'
x86_64-unknown-linux-gnu/32/libgfortran/libtool:140:pic_flag=" -fPIC - 
DPIC"
x86_64-unknown-linux-gnu/32/libgfortran/config.cache: 
259:ac_cv_prog_cc_pic=${ac_cv_prog_cc_pic=' -fPIC -DPIC'}
x86_64-unknown-linux-gnu/32/libgfortran/config.log:175:ltconfig: 
687:checking that /home/lpesce/GCC/gcc-4.1.1/objdir/./gcc/xgcc PIC  
flag -fPIC -DPIC works.
x86_64-unknown-linux-gnu/32/libgfortran/config.log:176:ltconfig:697: / 
home/lpesce/GCC/gcc-4.1.1/objdir/./gcc/xgcc -B/home/lpesce/GCC/ 
gcc-4.1.1/objdir/./gcc/ -B/usr/local/x86_64-unknown-linux-gnu/bin/ -B/ 
usr/local/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/x86_64- 
unknown-linux-gnu/include -isystem /usr/local/x86_64-unknown-linux- 
gnu/sys-include  -m32 -c -std=gnu99  std=gnu99 -O2 -g -O2  -Wunknown- 
pragmas -fPIC -DPIC -DPIC  conftest.c 1>&5
x86_64-unknown-linux-gnu/32/libgfortran/config.log: 
5146:ac_cv_prog_cc_pic=' -fPIC -DPIC'

>> Java seems to need the object files from libgfortran for the JNI
>> libraries to work properly
>
> No it doesn't.

Sorry, I did not report all the steps. I am constructing some jni  
libraries from
some fortran libraries. I seem to be able to use the fortran  
libraries as jni
if and only if the objects from libgfortran are included into the  
dynamically
linked jni library.
>>

I hope that it makes more sense now.

Lorenzo