Autoconf: Fortran-netCDF C compatibility test #229
Merged
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This patch introduces a new autoconf macro,
AX_FC_CHECK_C_LIB
, which confirms if the Fortran compiler can be linked to the netCDF C library. As with other netCDF tests, thenc-config
tool is used if necessary (and available).This resolves some recent issues on platforms where netCDF and netCDF-Fortran are installed in separate locations, with different library directories (
-L
).It also resolves some false assumptions in configure.ac which presumed equivalent access by the configured C and Fortran compilers. Previously, we would test if the C compiler could be linked to netCDF, and then assume that the Fortran compiler shared the same relationship. We now use the Fortran compiler for both C and Fortran tests.
This patch fixes many issues observed on MacOS systems, including some persistent problems on the GitHub Actions MacOS tests. For example, we can now use the default GCC 12 compilers, rather than forcing a rollback to GCC 11.