try to fix gh action CI error

Merge pull request #24 from jvdp1/fix_cmake

Addition of penf_allocatable_memory.F90 to CMakeLists.txt

Add FPM and GH Actions support

Add FPM and GH Actions support

Improve pre-proc flags and complete coverage.

Stable release, fully backward compatible.

Add support for character kinds, fix issue#10

Stable release, fully backward compatible.

Sanitize R16P exploitation

Sanitize R16P exploitation: if R16P is activated (at compile time) then
the default real kind `R_P` and all its *attributes* are escaled to `R16P`
kind, otherwise the R8P is used. Currently, there is not an automatic
way to escale `R_P` to `R4P` (but this seems to be a very unusual choice).

Stable release, fully backward compatible.

Add GNU makefile

Stable release, fully backward compatible.

Stable release, fully backward compatible.

Add compact real string facility, stable release, fully backward comp…

…atible.

Fix bug on bitstr(R16p) (found by StringiFor), stable release, fully …

…backward compatible.