Module files are installed in a folder named OFF when using cmake

[ecasglez]

Describe the issue

Hi. I use cmake 3.17.2 to compile and install stdlib. When I type make install library files are copied to a folder named lib, but module files are copied to a folder named OFF which looks wierd.

I use the following commands:

mkdir build
cd build
FC=/opt/gcc-10.2.0/bin/gfortran /opt/cmake/bin/cmake .. -DCMAKE_INSTALL_PREFIX=/opt/Fortran_stdlib/stdlib/install
make
make install

Expected behaviour

I think the name of the folder of the module files is OFF because it is set to False in cmake files. I am not sure if this might be a problem of my cmake installation, but applying the following change I manage to get them installed in a folder named include:

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b56d75b..2392c3d 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -87,4 +87,4 @@ install(TARGETS ${PROJECT_NAME}
         ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
         LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
 )
-install(DIRECTORY ${LIB_MOD_DIR} DESTINATION "${CMAKE_INSTALL_MODULEDIR}")
+install(DIRECTORY ${LIB_MOD_DIR} DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")

Technical Details
stdlib version
commit 68ec64f

Compiler version
GCC 10.2.0 and cmake 3.17.2

Platform and Architecture
Kubuntu 18.04 x86_64

[milancurcic]

Thanks a lot @ecasglez, I'll try to reproduce it.

[awvwgk]

Related patch: #459

[awvwgk]

Fix available in #511