More CMake work. Thanks to Mr-Hide in irc.freenode.net/#cmake.

CMakeLists.txt

@@ -6,8 +6,24 @@ set(CMAKE_CONFIGURATION_TYPES Debug Static Release ReleaseStatic)
 # we load the variables after calling project()
 # default to Debug if no configuration specified
 if(NOT CMAKE_BUILD_TYPE)
-	set(CMAKE_BUILD_TYPE Debug)
+	# the CACHE FORCE is necessary for this to work properly
+	set(CMAKE_BUILD_TYPE Debug CACHE STRING "Build type; one of: Debug Release Static ReleaseStatic" FORCE)
 endif()
+# and save whether this is shared in a variable
+if(${CMAKE_BUILD_TYPE} STREQUAL "Debug")
+	set(_SHARED TRUE)
+elseif(${CMAKE_BUILD_TYPE} STREQUAL "Release")
+	set(_SHARED TRUE)
+endif()
+if(WIN32)
+	if(NOT MSVC)
+		if(_SHARED)
+			message(FATAL_ERROR
+				"Sorry, libui for Windows cannot be built as a DLL with MinGW. You will need to either build as a static library or build with MSVC.")
+		endif()
+	endif()
+endif()
+
 
 # and we need to set this up prior to project() too
 set(CMAKE_OSX_DEPLOYMENT_TARGET "10.8")
@@ -25,18 +41,6 @@ cfgcopy(CMAKE_SHARED_LINKER_FLAGS)
 cfgcopy(CMAKE_STATIC_LINKER_FLAGS)
 cfgcopy(CMAKE_EXE_LINKER_FLAGS)
 
-set(_NOSHARED FALSE)
-if(WIN32)
-	if(NOT MSVC)
-		set(_NOSHARED TRUE)
-	endif()
-endif()
-macro(nosharedmingw _target)
-	add_custom_target(${_target}
-		COMMAND exit 1
-		COMMENT "Sorry, libui for Windows cannot be built as a DLL with MinGW. You will need to either build as a static library or build with MSVC.")
-endmacro(nosharedmingw)
-
 macro(append _var _val)
 	set(${_var} "${${_var}} ${_val}")
 endmacro()
@@ -122,3 +126,21 @@ append2(CMAKE_EXE_LINKER_FLAGS_STATIC CMAKE_EXE_LINKER_FLAGS_RUNTIMESTATIC
 	" ${_PLATFORM_LIBS}")
 
 add_subdirectory("common")
+add_subdirectory("${_OSDIR}")
+if(_SHARED)
+	add_library(libui SHARED
+		$<TARGET_OBJECTS:libui-common>
+		$<TARGET_OBJECTS:libui-${_OSDIR}>
+	)
+	if(_SETVERSION)
+		set_target_properties(libui PROPERTIES
+			SOVERSION "${_VERSION}")
+	endif()
+else()
+	_add_static(libui
+		$<TARGET_OBJECTS:libui-common>
+		$<TARGET_OBJECTS:libui-${_OSDIR}>
+	)
+endif()
+set_target_properties(libui PROPERTIES
+	OUTPUT_NAME ui)

common/CMakeLists.txt

@@ -12,5 +12,4 @@ add_library(libui-common OBJECT
 )
 set_target_properties(libui-common PROPERTIES
 	COMPILE_FLAGS "${_LIBUI_CFLAGS}"
-	LINK_FLAGS "${_LIBUI_LDFLAGS}"
 )

darwin/CMakeLists.txt

@@ -0,0 +1,62 @@
+# 31 may 2016
+
+include_directories(.. . ../common)
+
+add_library(libui-darwin OBJECT
+	alloc.m
+	area.m
+	areaevents.m
+	autolayout.m
+	box.m
+	button.m
+	checkbox.m
+	colorbutton.m
+	combobox.m
+	control.m
+	datetimepicker.m
+	debug.m
+	draw.m
+	drawtext.m
+	editablecombo.m
+	entry.m
+	fontbutton.m
+	group.m
+	label.m
+	main.m
+	map.m
+	menu.m
+	multilineentry.m
+	progressbar.m
+	radiobuttons.m
+	scrollview.m
+	separator.m
+	slider.m
+	spinbox.m
+	stddialogs.m
+	tab.m
+	text.m
+	util.m
+	window.m
+)
+set_target_properties(libui-darwin PROPERTIES
+	COMPILE_FLAGS "${_LIBUI_CFLAGS}"
+)
+
+macro(_add_static _name)
+	add_library(${_name} STATIC "${ARGN}")
+	file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/sharedhidden)
+	add_custom_command(
+		TARGET ${_name} POST_BUILD
+		COMMAND
+			${CMAKE_AR} x $<TARGET_FILE:${_name}>
+		COMMAND
+			nm -m *.o | sed -E -n "'s/^[0-9a-f]* \\([A-Z_]+,[a-z_]+\\) external //p'" > ${_name}.lst
+		COMMAND
+			ld -exported_symbols_list ${_name}.lst -r *.o -o ../_combined_${_name}.o
+		COMMAND
+			rm $<TARGET_FILE:${_name}>
+		COMMAND
+			${CMAKE_AR} rcs $<TARGET_FILE:${_name}> ../_combined_${_name}.o
+		WORKING_DIRECTORY ${PROJECT_BINARY_DIR}/sharedhidden
+		COMMENT "Removing hidden symbols")
+endmacro()