On Monday 07 January 2008 00:38:45 Granville Sewell wrote: > Without the -static switch (using gfortran), I get: > > /usr/local/gcc-4.2/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.2.3/../../../. >./lib64/libgfortran.so: file not recognized: File format not recognized > collect2: ld returned 1 exit status You build gcc yourself? How did you configure it (gfortran -v)? Something seems to be horribly messed up on your side?! I'm CC-ing gcc-help, maybe someone there has encountered this before. > There is a libgfortran.a file in the same lib directory, by the way. I > don't understand the difference between the *.a and *.so libraries. *.so - shared objects, used for dynamic linking, loaded at runtime *.a - archives, linked into the binary statically