Hey all,
i'm encountering link errors on C-Fortran interface verification on
MSYS2 (fully updated) / MinGW (x86_64-4.9.2-posix-seh-rt_v4-rev2) /
CMake 3.3.0.
Here's a minimal example:
cmake_minimum_required(VERSION 3.0 FATAL_ERROR)
project(C_Fortran_Mingw VERSION 1.0 LANGUAGES C Fortran)
include(FortranCInterface)
FortranCInterface_VERIFY()
this fails with link errors
D:/MSYS2_64/mingw64/bin/gcc.exe -O3 -DNDEBUG -Wl,--whole-archive
CMakeFiles/VerifyFortranC.dir/objects.a -Wl,--no-whole-archive -o
VerifyFortranC.exe -Wl,--out-implib,libVerifyFortranC.dll.a
-Wl,--major-image-version,0,--minor-image-version,0
@CMakeFiles/VerifyFortranC.dir/linklibs.rsp
libVerifyFortran.a(VerifyFortran.f.obj):VerifyFortran.f:(.text+0x35): undefined
reference to `_gfortran_st_write'
libVerifyFortran.a(VerifyFortran.f.obj):VerifyFortran.f:(.text+0x4a): undefined
reference to `_gfortran_transfer_character_write'
libVerifyFortran.a(VerifyFortran.f.obj):VerifyFortran.f:(.text+0x52): undefined
reference to `_gfortran_st_write_done'
after checking, the @CMakeFiles/VerifyFortranC.dir/linklibs.rsp does not
contain the "-lgfortran" library include, hence the fuss.
however, while that might fix the issue, i've found no way to tell the
FortranCInterface scripts to add that, and following Brad's argumentation
in
http://cmake.3232098.n2.nabble.com/mixing-c-fortran-missing-gfortran-sometimes-td5563701.html,
CMake should pick those things up automatically.
so am i missing something obvious here or is this still an (mingw-only)
issue?
to be clear, i can just skip the verification tests and everything
works, but i'd like to think that if that is the case the
FortranCInterface_VERIFY()
should work as well.
thanks!
Daniel
--
Dr. Daniel Wirtz
Dipl. Math. Dipl. Inf.
SRC SimTech
Pfaffenwaldring 5a, D-70569 Stuttgart
+49 (711) 685-60044
--
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