Link error when building with GFortran and OpenMP

[skn123]

If I use the stock OpenBlas libraries provided in the download page, or build them as it, I get some link errors. This is because GFortran (and if used, OpenIMP) imports are not passed on to the linker. Thus, when I want to use OpenBlas with other libraries, I have to pass the import libraries for GFortran and OpenMP. I tracked the problem and this happens in the "dllimport" line in the Exports folder. I replaced that with my own line using gcc. This removed the problem. I think this should be incorporated into OpenBlas.

gcc.exe -shared -o libopenblas.dll -Wl,--out-implib,libopenblas.dll.a -Wl,--major-image-version,0,--minor-image-version,0 -Wl,--whole-archive ./libopenblas_piledriverp-r0.2.9.rc2.a -Wl,--no-whole-archive -Wl,--allow-multiple-definition -lgfortran -lgomp -lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32

In this case, I had built the library with TARGET=PILEDRIVER
I also had to pass -Wl,--allow-multiple-definition as it was complaining of multiple definitions in various .o files. Finally, I also forced the linker to select the static builds of libgfortran.a and libgomp.a instead of their respective imports (i.e., libgfortran.dll.a and libgomp.dll.a) by physically deleting the non-essential files. Is there a cleaner way to do this?

The library now built links with other libraries without any problem (i.e., link errors).