CMake: Generator re-write and bug fixes.

Updated CMakeLists.txt generator to handle private macro definitions for
source groups. Individual source groups are added as OBJECT libraries,
which does not generate actual archive but will be linked together at
final application linking stage. Source groups without source files are
added as INTERFACE libraries, which provides library dependencies to the
final application.

Signed-off-by: Yilin Sun <imi415@imi.moe>

tools/cmake.py

@@ -172,32 +172,125 @@ def GenerateCFiles(env, project, project_name):
             cm_file.write("\t-D" + i + "\n")
         cm_file.write(")\n\n")
 
-        cm_file.write("SET(PROJECT_SOURCES\n")
+        libgroups = []
+        interfacelibgroups = []
         for group in project:
+            if group['name'] == 'Applications':
+                continue
+
+            # When a group is provided without sources, add it to the <INTERFACE> library list
+            if len(group['src']) == 0:
+                interfacelibgroups.append(group)
+            else:
+                libgroups.append(group)
+
+        cm_file.write("# Library source files\n")
+        for group in project:
+            cm_file.write("SET(RT_{:s}_SOURCES\n".format(group['name'].upper()))
             for f in group['src']:
                 # use relative path
                 path = _make_path_relative(os.getcwd(), os.path.normpath(f.rfile().abspath))
                 cm_file.write( "\t" + path.replace("\\", "/") + "\n" )
-        cm_file.write(")\n\n")
+            cm_file.write(")\n\n")
 
-        if rtconfig.PLATFORM in ['gcc']:
-            cm_file.write("LINK_DIRECTORIES(\n")
-            for group in project:
-                if 'LIBPATH' in group.keys():
-                    for f in group['LIBPATH']:
-                        cm_file.write( "\t"+ f.replace("\\", "/") + "\n" )
+        cm_file.write("# Library search paths\n")
+        for group in libgroups + interfacelibgroups:
+            if not 'LIBPATH' in group.keys():
+                continue
+
+            if len(group['LIBPATH']) == 0:
+                continue
+
+            cm_file.write("SET(RT_{:s}_LINK_DIRS\n".format(group['name'].upper()))
+            for f in group['LIBPATH']:
+                cm_file.write("\t"+ f.replace("\\", "/") + "\n" )
             cm_file.write(")\n\n")
 
-            cm_file.write("LINK_LIBRARIES(\n")
-            for group in project:
-                if 'LIBS' in group.keys():
-                    for f in group['LIBS']:
-                        cm_file.write( "\t"+ "{}\n".format(f.replace("\\", "/")))
+        cm_file.write("# Library local macro definitions\n")
+        for group in libgroups:
+            if not 'LOCAL_CPPDEFINES' in group.keys():
+                continue
+
+            if len(group['LOCAL_CPPDEFINES']) == 0:
+                continue
+
+            cm_file.write("SET(RT_{:s}_DEFINES\n".format(group['name'].upper()))
+            for f in group['LOCAL_CPPDEFINES']:
+                cm_file.write("\t"+ f.replace("\\", "/") + "\n" )
+            cm_file.write(")\n\n")
+
+        cm_file.write("# Library dependencies\n")
+        for group in libgroups + interfacelibgroups:
+            if not 'LIBS' in group.keys():
+                continue
+
+            if len(group['LIBS']) == 0:
+                continue
+
+            cm_file.write("SET(RT_{:s}_LIBS\n".format(group['name'].upper()))
+            for f in group['LIBS']:
+                cm_file.write("\t"+ "{}\n".format(f.replace("\\", "/")))
             cm_file.write(")\n\n")
 
-        cm_file.write("ADD_EXECUTABLE(${CMAKE_PROJECT_NAME}.elf ${PROJECT_SOURCES})\n")
+        cm_file.write("# Libraries\n")
+        for group in libgroups:
+            cm_file.write("ADD_LIBRARY(rtt_{:s} OBJECT ${{RT_{:s}_SOURCES}})\n"
+                          .format(group['name'], group['name'].upper()))
+
+        cm_file.write("\n")
+
+        cm_file.write("# Interface libraries\n")
+        for group in interfacelibgroups:
+            cm_file.write("ADD_LIBRARY(rtt_{:s} INTERFACE)\n".format(group['name']))
+
+        cm_file.write("\n")
+
+        cm_file.write("# Private macros\n")
+        for group in libgroups:
+            if not 'LOCAL_CPPDEFINES' in group.keys():
+                continue
+
+            if len(group['LOCAL_CPPDEFINES']) == 0:
+                continue
+
+            cm_file.write("TARGET_COMPILE_DEFINITIONS(rtt_{:s} PRIVATE ${{RT_{:s}_DEFINES}})\n"
+              .format(group['name'], group['name'].upper()))
+
+        cm_file.write("\n")
+
+        cm_file.write("# Interface library search paths\n")
+        if rtconfig.PLATFORM in ['gcc']:
+            for group in libgroups:
+                if not 'LIBPATH' in group.keys():
+                    continue
+
+                if len(group['LIBPATH']) == 0:
+                    continue
+
+                cm_file.write("TARGET_LINK_DIRECTORIES(rtt_{:s} INTERFACE ${{RT_{:s}_LINK_DIRS}})\n"
+                              .format(group['name'], group['name'].upper()))
+
+            for group in libgroups:
+                if not 'LIBS' in group.keys():
+                    continue
+
+                if len(group['LIBS']) == 0:
+                    continue
+
+                cm_file.write("TARGET_LINK_LIBRARIES(rtt_{:s} INTERFACE ${{RT_{:s}_LIBS}})\n"
+                              .format(group['name'], group['name'].upper()))
+
+        cm_file.write("\n")
+
+        cm_file.write("ADD_EXECUTABLE(${CMAKE_PROJECT_NAME}.elf ${RT_APPLICATIONS_SOURCES})\n")
+
+        cm_file.write("TARGET_LINK_LIBRARIES(${CMAKE_PROJECT_NAME}.elf\n")
+        for group in libgroups + interfacelibgroups:
+            cm_file.write("\trtt_{:s}\n".format(group['name']))
+        cm_file.write(")\n\n")
+
         cm_file.write("ADD_CUSTOM_COMMAND(TARGET ${CMAKE_PROJECT_NAME}.elf POST_BUILD \n" + POST_ACTION + '\n)\n')
-            
+
         # auto inclue `custom.cmake` for user custom settings
         custom_cmake = \
             '''