Lapack dependency on Windows

[Beliavsky]

Trying FPM on the project at https://github.com/gha3mi/foreig I don't get an executable because it cannot find Lapack. I get errors such as

>fpm test
[  0%]                      test1.exe
[100%]                      test1.exe  done.

c:/programs/gcc/bin/../lib/gcc/x86_64-w64-mingw32/13.0.0/../../../../x86_64-w64-mingw32/bin/ld.exe: build\gfortran_A18F5477E168D1CF\foreig\libforeig.a(src_foreig.f90.o): in function `dsyev_rel':
c:\...\foreig/././src/foreig.f90:69: undefined reference to `dsyev_'
c:/programs/gcc/bin/../lib/gcc/x86_64-w64-mingw32/13.0.0/../../../../x86_64-w64-mingw32/bin/ld.exe: c:\...\foreig/././src/foreig.f90:80: undefined reference to `dsyev_'

as detailed in gha3mi/foreig#1. (Following the advice given did not solve the problem.) I have compiled Lapack and BLAS on my PC to create .a files, and the following command creates an executable:

gfortran build\dependencies\kinds\src\kinds.f90 src\foreig.f90 test\test1.f90 liblapack.a librefblas.a

I have copied the .a files to c:\lib, and the following command also works:

gfortran build\dependencies\kinds\src\kinds.f90 src\foreig.f90 test\test1.f90 -LC:\\lib -llapack -lrefblas

How do I tell FPM to look in c:\lib for needed libraries?

[gnikit]

Something like this should work I think,

fpm test --link-flag "-LC:\\lib"

or by setting the environmental variable FPM_LDFLAGS

FPM_LDFLAGS="-LC:\\lib
fpm test