separate fortran and cpp files into their own targets

combining fortran and cpp files in the same target was causing fortran
flags to be applied to cpp files, which could cause build failures
with clang.

bindings/Fortran/CMakeLists.txt

@@ -23,14 +23,34 @@ if(ADIOS2_USE_Fortran_flag_argument_mismatch)
   set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fallow-argument-mismatch")
 endif()
 
-add_library(adios2_fortran
+# separate the cpp files and fortran files into separate targets
+# otherwise clang complains about unknown arg -fallow-argument-mismatch for cpp files
+add_library(adios2_f2c
   f2c/adios2_f2c_adios.cpp
   f2c/adios2_f2c_attribute.cpp
   f2c/adios2_f2c_io.cpp
   f2c/adios2_f2c_variable.cpp
   f2c/adios2_f2c_engine.cpp
   f2c/adios2_f2c_operator.cpp
+)
+set_property(TARGET adios2_f2c PROPERTY EXPORT_NAME f2c)
+set_property(TARGET adios2_f2c PROPERTY OUTPUT_NAME adios2${ADIOS2_LIBRARY_SUFFIX}_f2c)
 
+target_include_directories(adios2_f2c
+  PUBLIC
+    $<BUILD_INTERFACE:${CMAKE_Fortran_MODULE_DIRECTORY}>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/adios2/fortran>
+  PRIVATE
+    ${CMAKE_CURRENT_BINARY_DIR}
+)
+
+target_link_libraries(adios2_f2c
+  PRIVATE
+    adios2_c
+    adios2_core
+)
+
+add_library(adios2_fortran
   modules/adios2_mod.f90
   modules/adios2_functions_mod.f90
   modules/adios2_functions_allocate_mod.f90
@@ -69,6 +89,7 @@ target_link_libraries(adios2_fortran
   PRIVATE
     adios2_c
     adios2_core
+    adios2_f2c
 )
 
 if(ADIOS2_HAVE_FORTRAN_SUBMODULES)
@@ -81,20 +102,40 @@ set_target_properties(adios2_fortran PROPERTIES
   SOVERSION ${ADIOS2_LIBRARY_SOVERSION}
 )
 
+add_library(adios2::f2c ALIAS adios2_f2c)
 add_library(adios2::fortran ALIAS adios2_fortran)
 
 if(ADIOS2_HAVE_MPI)
   target_compile_definitions(adios2_fortran PRIVATE "$<$<COMPILE_LANGUAGE:Fortran>:ADIOS2_HAVE_MPI_F>")
 
+  set(adios2_f2c_mpi_srcs
+    f2c/adios2_f2c_adios_mpi.cpp
+    f2c/adios2_f2c_io_mpi.cpp
+    )
   set(adios2_fortran_mpi_srcs
     modules/adios2_adios_init_mpi_smod.F90
     modules/adios2_io_open_mpi_smod.F90
-    f2c/adios2_f2c_adios_mpi.cpp
-    f2c/adios2_f2c_io_mpi.cpp
     )
 
   if(ADIOS2_HAVE_FORTRAN_SUBMODULES)
     # With submodules we can put MPI implementations in a separate library.
+    add_library(adios2_f2c_mpi ${adios2_f2c_mpi_srcs})
+    target_include_directories(adios2_f2c_mpi PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
+    target_link_libraries(adios2_f2c_mpi
+      PUBLIC
+        adios2_f2c
+      PRIVATE
+        adios2_c_mpi
+        adios2_core_mpi
+      PUBLIC
+        MPI::MPI_C
+    )
+    set_target_properties(adios2_f2c_mpi PROPERTIES
+      VERSION ${ADIOS2_LIBRARY_VERSION}
+      SOVERSION ${ADIOS2_VERSION_MAJOR}
+    )
+    set_property(TARGET adios2_f2c_mpi PROPERTY OUTPUT_NAME adios2${ADIOS2_LIBRARY_SUFFIX}_f2c_mpi)
+
     add_library(adios2_fortran_mpi ${adios2_fortran_mpi_srcs})
     target_include_directories(adios2_fortran_mpi PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
     target_link_libraries(adios2_fortran_mpi
@@ -103,6 +144,7 @@ if(ADIOS2_HAVE_MPI)
       PRIVATE
         adios2_c_mpi
         adios2_core_mpi
+        adios2_f2c_mpi
       PUBLIC
         MPI::MPI_Fortran
     )
@@ -120,19 +162,23 @@ if(ADIOS2_HAVE_MPI)
     target_link_libraries(adios2_fortran PRIVATE adios2_c_mpi adios2_core_mpi)
   endif()
 
+  set_property(TARGET adios2_f2c_mpi PROPERTY EXPORT_NAME fortran2c_mpi)
+  target_compile_definitions(adios2_f2c_mpi INTERFACE ADIOS2_USE_MPI)
+  add_library(adios2::f2c_mpi ALIAS adios2_f2c_mpi)
+
   set_property(TARGET adios2_fortran_mpi PROPERTY EXPORT_NAME fortran_mpi)
   target_compile_definitions(adios2_fortran_mpi INTERFACE ADIOS2_USE_MPI)
   add_library(adios2::fortran_mpi ALIAS adios2_fortran_mpi)
-  set(maybe_adios2_fortran_mpi adios2_fortran_mpi)
+  set(maybe_adios2_fortran_mpi adios2_fortran_mpi adios2_f2c_mpi)
 else()
   set(maybe_adios2_fortran_mpi)
 endif()
 
 add_library(adios2_f INTERFACE)
-target_link_libraries(adios2_f INTERFACE ${maybe_adios2_fortran_mpi} adios2_fortran)
+target_link_libraries(adios2_f INTERFACE ${maybe_adios2_fortran_mpi} adios2_fortran adios2_f2c)
 
 install(
-  TARGETS adios2_fortran ${maybe_adios2_fortran_mpi} adios2_f EXPORT adios2FortranExports
+  TARGETS adios2_f2c adios2_fortran ${maybe_adios2_fortran_mpi} adios2_f EXPORT adios2FortranExports
   RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT adios2_fortran-runtime
   LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT adios2_fortran-libraries NAMELINK_COMPONENT adios2_fortran-development
   ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT adios2_fortran-development