Merge pull request #55 from ecmwf/feature/fortran

Feature/fortran
ecmwf · Jun 5, 2023 · a5502ea · a5502ea
2 parents 2db8697 + 1c99789
commit a5502ea
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Showing 3 changed files with 58 additions and 1 deletion.
diff --git a/cmake/ecbuild_generate_fortran_interfaces.cmake b/cmake/ecbuild_generate_fortran_interfaces.cmake
@@ -69,7 +69,25 @@
 
 function( ecbuild_generate_fortran_interfaces )
 
-  find_program( FCM_EXECUTABLE fcm REQUIRED DOC "Fortran interface generator" )
+  find_program( FCM_EXECUTABLE fcm DOC "Fortran interface generator"
+                HINTS
+                  ${CMAKE_SOURCE_DIR}/fcm
+                  ${CMAKE_BINARY_DIR}/fcm
+                  ${fcm_ROOT}
+                  ENV fcm_ROOT
+                  PATH_SUFFIXES bin )
+  if (NOT FCM_EXECUTABLE)
+    include(FetchContent)
+    set(ECBUILD_FCM_VERSION "2019.09.0" CACHE STRING "FCM version used to generate Fortran interfaces")
+    FetchContent_Populate(
+      fcm
+      URL            "https://github.com/metomi/fcm/archive/refs/tags/${ECBUILD_FCM_VERSION}.tar.gz"
+      SOURCE_DIR     ${CMAKE_BINARY_DIR}/fcm
+      BINARY_DIR     ${CMAKE_BINARY_DIR}/_deps/fcm-build
+      SUBBUILD_DIR   ${CMAKE_BINARY_DIR}/_deps/fcm-subbuild
+    )
+    set( FCM_EXECUTABLE ${CMAKE_BINARY_DIR}/fcm/bin/fcm )
+  endif()
 
   if( NOT FCM_EXECUTABLE )
     ecbuild_error( "ecbuild_generate_fortran_interfaces: fcm executable not found." )

diff --git a/cmake/ecbuild_system.cmake b/cmake/ecbuild_system.cmake
@@ -221,6 +221,7 @@ if( NOT ECBUILD_SYSTEM_INITIALISED )
     include( ecbuild_enable_fortran )
     include( ecbuild_source_flags )
     include( ecbuild_target_flags )
+    include( ecbuild_target_fortran_module_directory )
     include( ecbuild_pkgconfig )
     include( ecbuild_cache )
     include( ecbuild_remove_fortran_flags )

diff --git a/cmake/ecbuild_target_fortran_module_directory.cmake b/cmake/ecbuild_target_fortran_module_directory.cmake
@@ -0,0 +1,38 @@
+# (C) Copyright 2022- ECMWF.
+# 
+# This software is licensed under the terms of the Apache Licence Version 2.0
+# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
+# In applying this licence, ECMWF does not waive the privileges and immunities
+# granted to it by virtue of its status as an intergovernmental organisation
+# nor does it submit to any jurisdiction.
+
+macro( ecbuild_target_fortran_module_directory )
+  set( options NO_MODULE_DIRECTORY )
+  set( single_value_args TARGET MODULE_DIRECTORY INSTALL_MODULE_DIRECTORY )
+  set( multi_value_args "" )
+  cmake_parse_arguments( _PAR "${options}" "${single_value_args}" "${multi_value_args}"  ${_FIRST_ARG} ${ARGN} )
+
+  if( NOT _PAR_TARGET )
+    ecbuild_critical( "Missing argument TARGET" )
+  endif()
+
+  if( _PAR_NO_MODULE_DIRECTORY )
+    set_target_properties( ${_PAR_TARGET} PROPERTIES Fortran_MODULE_DIRECTORY "" )
+  else()
+    if( NOT _PAR_MODULE_DIRECTORY )
+      ecbuild_critical( "Missing argument MODULE_DIRECTORY" )
+    endif()
+    set_target_properties( ${_PAR_TARGET} PROPERTIES Fortran_MODULE_DIRECTORY ${_PAR_MODULE_DIRECTORY} )
+    target_include_directories( ${_PAR_TARGET} PUBLIC $<BUILD_INTERFACE:${_PAR_MODULE_DIRECTORY}> )
+  endif()
+
+  if( ECBUILD_INSTALL_FORTRAN_MODULES )
+    if( _PAR_INSTALL_MODULE_DIRECTORY )
+      target_include_directories( ${_PAR_TARGET} PUBLIC $<INSTALL_INTERFACE:${_PAR_INSTALL_MODULE_DIRECTORY}> )
+      install( DIRECTORY ${_PAR_MODULE_DIRECTORY}/
+               DESTINATION ${_PAR_INSTALL_MODULE_DIRECTORY}
+               COMPONENT modules )
+    endif()
+  endif()
+
+endmacro()