I am trying to link some libraries to create an executable using the gfortran implementation in MinGW on Windows. I have the library files available as .dll and .lib, and they are available on the path. When I try to compile my program, I get an error as follows:
libblas.dll: file not recognized: File format not recognized
My input is as follows:
gfortran -O3 -g dependency.o testmain.o -o ../testrun.exe -lblas -llapack
blas and lapack are the libraries I want to link, and they are available as libblas.dll and liblapack.dll on the path. Other libraries seem to be available as *.a or *.dll.a files, but I am not sure how to convert the libraries I want to use into that format.
Why does this happen and is there a way to work around this to create a working executable?
This often happens if you're trying to run a x64 DLL by a x32 process. For example, if you run lua54.dll build for x64 using ming x32 you'll get this same error. Switching to x32 dll should fix it (that or using a x64 process).