starting to rebuild cmake build system

CMakeLists.txt

@@ -1,9 +1,12 @@
+# This is the make cmake file for wgrib2.
+#
+# Kyle Gerheiser, Edward Hartnett
 cmake_minimum_required(VERSION 3.12)
-project(wgrib2 VERSION 2.0.8 LANGUAGES Fortran C)
+project(wgrib2 VERSION 3.2.0 LANGUAGES Fortran C)
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
-#set default install path if not provided
+# Set default install path if not provided.
 if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
   set(CMAKE_INSTALL_PREFIX
     "${CMAKE_BINARY_DIR}/install"
@@ -12,6 +15,7 @@ endif()
 
 include(GNUInstallDirs)
 
+# Set compiler flags.
 if(CMAKE_C_COMPILER_ID MATCHES "^(Intel)$")
   set(CMAKE_C_FLAGS "-g -traceback ${CMAKE_C_FLAGS}")
   set(CMAKE_C_FLAGS_DEBUG "-O0")
@@ -28,6 +32,7 @@ elseif(CMAKE_Fortran_COMPILER_ID MATCHES "^(GNU)$")
   set(CMAKE_Fortran_FLAGS_DEBUG "-ggdb -O0")
 endif()
 
+# Handle build options.
 option(USE_NETCDF3 "Use NetCDF-3?" off)
 option(USE_NETCDF4 "Use NetCDF-4?" off)
 option(USE_REGEX "Use Regex?" on)
@@ -50,7 +55,6 @@ option(USE_AEC "Use AEC?" off)
 option(BUILD_LIB "Build wgrib2 library?" on)
 option(BUILD_SHARED_LIB "Build shared library?" off)
 
-
 if(USE_G2CLIB) 
   if(USE_PNG) 
     message(FATAL_ERROR "If USE_G2CLIB is on, USE_PNG must be off")
@@ -134,10 +138,11 @@ if(USE_WMO_VALIDATION)
   list(APPEND definitions_list -DUSE_WMO_VALIDATION)
 endif()
 
+# Build these subdirectories.
 add_subdirectory(wgrib2)
 add_subdirectory(aux_progs)
 
-
+# Build the wgrib2 library if desired.
 if(BUILD_LIB)
   add_subdirectory(ftn_api)
 

aux_progs/CMakeLists.txt

@@ -0,0 +1,7 @@
+# This is the cmake file for the aux_progs directory of wgrib2.
+#
+# Kyle Gerheiser, Edward Hartnett
+
+add_executable(gmerge gmerge.c uint8.c)
+add_executable(smallest_grib2 smallest_grib2.c uint8.c)
+add_executable(smallest_4 smallest_4.c uint8.c)

ftn_api/CMakeLists.txt

@@ -0,0 +1,28 @@
+# This is the cmake file for the ftn_api directory of wgrib2.
+#
+# Kyle Gerheiser, Edward Hartnett
+
+set(fortran_src wgrib2api.f90 wgrib2lowapi.f90)
+
+set(c_src fort_wgrib2.c)
+
+add_library(wgrib2_api ${fortran_src} ${c_src})
+
+set(module_dir "${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_INSTALL_INCLUDEDIR}")
+set_target_properties(wgrib2_api PROPERTIES Fortran_MODULE_DIRECTORY ${module_dir})
+
+target_include_directories(wgrib2_api
+    PUBLIC $<BUILD_INTERFACE:${module_dir}>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}>)
+
+target_link_libraries(wgrib2_api PUBLIC wgrib2_lib)  
+
+install(DIRECTORY ${module_dir} DESTINATION ${CMAKE_INSTALL_PREFIX})
+
+install(
+  TARGETS wgrib2_api
+  EXPORT wgrib2_exports
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+

wgrib2/CMakeLists.txt

@@ -0,0 +1,107 @@
+# This is the cmake file for the wgrib2 directory of wgrib2.
+#
+# Kyle Gerheiser, Edward Hartnett
+
+# sets lib_src
+include("source-files.cmake")
+
+set(callable_src
+  wgrib2.c
+  fatal_error.c
+  wgrib2_api.c
+  )   
+
+# This subdirectory no longer present!
+#add_subdirectory(gctpc)
+
+# make this an object lib so we can re-use most of object files
+# The only files that differ are ${callable_src} which are compiled
+# with -DCALLABLE_WGRIB2
+add_library(obj_lib OBJECT ${lib_src})
+target_compile_definitions(obj_lib PUBLIC ${definitions_list}) 
+
+if(BUILD_LIB)
+  # with -DCALLABLE_WGRIB2 for the lib
+  if(BUILD_SHARED_LIB)
+    add_library(wgrib2_lib SHARED ${lib_src} $<TARGET_OBJECTS:gctpc> ${callable_src})
+  else()
+    add_library(wgrib2_lib STATIC ${lib_src} $<TARGET_OBJECTS:gctpc> ${callable_src})
+  endif()
+
+  # library and executable have same name (wgrib2) but different target names
+  set_target_properties(wgrib2_lib PROPERTIES OUTPUT_NAME wgrib2)
+  target_compile_definitions(wgrib2_lib PRIVATE CALLABLE_WGRIB2 USE_REGEX)
+endif()
+
+
+# without -DCALLABLE_WGRIB2 for the executable
+add_executable(wgrib2_exe ${callable_src})
+set_target_properties(wgrib2_exe PROPERTIES OUTPUT_NAME wgrib2)
+
+if(USE_NETCDF4)
+  target_link_libraries(obj_lib PUBLIC NetCDF::NetCDF_C)
+endif()
+
+if(USE_JASPER)
+  target_include_directories(obj_lib PUBLIC ${JASPER_INCLUDE_DIR})
+  target_link_libraries(obj_lib PUBLIC ${JASPER_LIBRARIES})
+endif()
+
+if(USE_PNG)
+  target_link_libraries(obj_lib PUBLIC PNG::PNG)
+endif()
+
+if(OpenMP_C_FOUND)
+  target_link_libraries(obj_lib PUBLIC OpenMP::OpenMP_C)
+endif()
+
+if(USE_G2CLIB)
+endif()
+
+if(USE_IPOLATES EQUAL 3)
+  target_link_libraries(obj_lib PUBLIC ip2::ip2_d)
+
+  # Link to the Fortran runtime library for each compiler if using ip2.
+  # The wgrib2 exectuable is created using the C compiler and
+  # doesn't link the necessary Fortran library required for ip2.
+  if(CMAKE_Fortran_COMPILER_ID MATCHES "^(Intel)$")
+    target_link_libraries(wgrib2_exe PRIVATE "-lifcore")
+  elseif(CMAKE_Fortran_COMPILER_ID MATCHES "^(GNU)$")
+    target_link_libraries(wgrib2_exe PRIVATE "-lgfortran")
+  endif()
+
+endif()
+
+target_link_libraries(obj_lib PUBLIC gctpc -lm)
+
+# Link to gctpc directly because oobject libraries do not link transitively
+target_link_libraries(wgrib2_exe PRIVATE gctpc)
+target_link_libraries(wgrib2_exe PRIVATE obj_lib)
+
+if(BUILD_LIB)
+  set(headers wgrib2_api.h wgrib2.h)
+  target_link_libraries(wgrib2_lib PUBLIC gctpc)
+  set_target_properties(wgrib2_lib PROPERTIES PUBLIC_HEADER "${headers}")
+
+  install(
+    TARGETS wgrib2_lib
+    EXPORT wgrib2_exports
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+    )
+
+endif()
+
+install(
+  TARGETS wgrib2_exe obj_lib
+  EXPORT wgrib2_exports
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+
+
+
+
+