混合语言与介子构建系统 (Fortran/C++) 的链接错误

Question

I am encountering issues when trying to compile fortran code using meson build system on an HPC cluster.

On the cluster, I am using Intel compiler suite. The meson compile command aborts at the linking step with:

ld: /usr/bin/../lib64/crt1.o: in function `_start':
(.text+0x20): undefined reference to `main'
ninja: build stopped: subcommand failed.

The interesting thing is that the link command issued by meson is something like this: icpc -o main main.p/somefile.o... , so it is using Intel's C++ compiler to link my fortran code. I tried to use the exact same command line, replacing icpc with ifort and adding -lstdc++ . That actually worked.

So, I wonder, is there a way to force Meson to link my code with ifort , instead of icpc ? Or, should I do something else?

I am afrad I cannot share the code at this moment. But, I'm open to showing bits and pieces of the meson.build file(s), if needed.

Details

• The codebase consists of fortran source and a CMake C++ subproject; Essentially, the C++ subproject is a wrapper for OpenCV image plotting functions. This is why I needed to add -lstdc++ to my successful manual link command above.

• Meson version: 0.55.3

• Intel Fortran compiler: ifort (IFORT) 19.1.3.304 20200925

• Intel C++ compiler: icpc (ICC) 19.1.3.304 20200925

• The code is MPI parallelised.

• The same code compiles well with GNU compilers v10 on a normal workstation.

Answer 1

Meson is not going to do any hand-holding when it comes to mixing languages. Here is what I found out works for Intel compilers:

fc=meson.get_compiler('fortran')
# cxx=meson.get_compiler('cpp')
...
if (fc.get_id() == 'intel')
#if (cxx.get_id() == 'intel')
...
add_global_link_arguments('-cxxlib',language : 'fortran')
add_global_link_arguments('-nofor_main', language : 'cpp')
endif

...

executable('myprog','myprog.f90', ..., link_language : 'fortran')
#executable('myprog','myprog.f90',...)