CMAKE: use PNAME_LANG_FLAGS

Author: awnawab

CMakeLists.txt

@@ -19,6 +19,8 @@ if( NOT ECWAM_PROJECT_NAME )
   set( ECWAM_PROJECT_NAME ecwam )
 endif()
 
+string( TOUPPER ${ECWAM_PROJECT_NAME} PNAME )
+set( ${PNAME}_ECBUILD_COMPILE_FLAGS ${CMAKE_CURRENT_SOURCE_DIR}/cmake/ecwam_init_flags.cmake CACHE FILEPATH "")
 project( ${ECWAM_PROJECT_NAME} LANGUAGES Fortran C CXX )
 
 include( ecwam_macros )

cmake/ecwam_compile_flags.cmake

@@ -6,6 +6,11 @@
 # granted to it by virtue of its status as an intergovernmental organisation
 # nor does it submit to any jurisdiction.
 
+# Capture ecbuild defaults and/or flags set by a toolchain
+set( ${PNAME}_Fortran_FLAGS ${ECBUILD_Fortran_FLAGS} )
+set( ${PNAME}_Fortran_FLAGS_BIT ${ECBUILD_Fortran_FLAGS_BIT} )
+set( ${PNAME}_Fortran_FLAGS_DEBUG ${ECBUILD_Fortran_FLAGS_DEBUG} )
+
 if(CMAKE_Fortran_COMPILER_ID MATCHES "Cray")
   set(autopromote_flags   "-sreal64")
   set(checkbounds_flags   "-Rb")
@@ -44,7 +49,8 @@ if( NOT HAVE_SINGLE_PRECISION )
   ecbuild_add_fortran_flags( "${autopromote_flags}"   NAME autopromote )
 endif()
 if( DEFINED vectorization_flags )
-  ecbuild_add_fortran_flags( "${vectorization_flags}"   NAME vectorization )
+  # vectorization flags must be per-sourcefile overrideable, so are set via ${PNAME}_Fortran_FLAGS
+  set( ${PNAME}_Fortran_FLAGS_BIT "${${PNAME}_Fortran_FLAGS_BIT} ${vectorization_flags}" )
 endif()
 if( DEFINED fpmodel_flags )
   ecbuild_add_fortran_flags( "${fpmodel_flags}"   NAME fpmodel )

cmake/ecwam_init_flags.cmake

@@ -0,0 +1,9 @@
+# (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.
+
+# Empty file to trigger ecbuild to use ${PNAME}_<LANG>_FLAGS