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A software I am working on ships with NETLIB BLAS/LAPACK embedded into its sources using all-lowercase symbol names but now while porting the application to windows I discovered that Intel MKL and several other BLAS/LAPACK implementations for this platform use all-uppercase symbol names. Is there a way to tell the gnu compiler/linker to ignore case while matching symbol names?
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undefined reference to `_dgeqp3'
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$ nm /lib/LAPACK.lib | grep -i " T _dgeqp3"
00000000 T _DGEQP3
The difference you’re seeing is due to Fortran calling conventions: in Fortran, symbol case is unimportant, and thus every compiler has a way to translate Fortran symbol names into assembler symbol names: GNU compilers usually translate all to lowercase, Intel on Windows goes for uppercase.
If you’re working with Fortran code, you can use the
-fsymbol-case-upperoption on the olderg77compiler (the newergfortrancompiler doesn’t have this). Otherwise, no simple answer for C, except:#define‘s