Rewrite CMake dependency installation

Replaces the hard-coded library paths by a method based on CMake's
GetPrerequisites module which recursively finds a binary file's linked
libraries. Advantage: Potentially works on any system without adaption as
long as CMake supports it, so it could be used to create portable Linux
packages as well. Disadvantage: "Potentially".

Co-Authored-By: Hyunjin Song <tteu.ingog@gmail.com>

cmake/install/CMakeLists.txt

@@ -0,0 +1,125 @@
+
+FUNCTION(GET_COMPILER_SEARCH_DIR VAR)
+	SET(results "")
+	IF(CMAKE_CXX_COMPILER_ID MATCHES "(GNU|Clang|AppleClang)")
+		EXECUTE_PROCESS(
+			COMMAND ${CMAKE_CXX_COMPILER} --print-search-dirs
+			OUTPUT_VARIABLE out
+		)
+		STRING(REPLACE "\n" ";" out "${out}")
+		FOREACH(line ${out})
+			IF(line MATCHES "^.+:")
+				STRING(REPLACE " " ";" line "${line}")
+				LIST(GET line 1 paths)
+				# Remove "=" prefix
+				STRING(REGEX REPLACE "^=" "" paths "${paths}")
+				STRING(REPLACE ":" ";" paths "${paths}")
+				FOREACH(path ${paths})
+					LIST(APPEND results ${path})
+				ENDFOREACH()
+			ENDIF()
+		ENDFOREACH()
+	ENDIF()
+
+	SET(paths "")
+	FOREACH(result ${results})
+		GET_FILENAME_COMPONENT(result ${result} REALPATH)
+		IF(IS_DIRECTORY "${result}")
+			LIST(APPEND paths ${result})
+		ENDIF()
+	ENDFOREACH()
+	LIST(REMOVE_DUPLICATES paths)
+
+	SET(${VAR} ${paths} PARENT_SCOPE)
+ENDFUNCTION()
+
+SET(PLUGIN_FILES "")
+IF(LMMS_BUILD_WIN32)
+	INSTALL(FILES $<TARGET_FILE:Qt5::QWindowsIntegrationPlugin> DESTINATION platforms)
+ENDIF()
+
+IF(LMMS_BUILD_WIN32 OR LMMS_INSTALL_DEPENDENCIES)
+	# Collect directories to search for DLLs
+	GET_FILENAME_COMPONENT(QTBIN_DIR "${QT_QMAKE_EXECUTABLE}" PATH)
+	set(LIB_DIRS "${QTBIN_DIR}")
+
+	GET_PROPERTY(PLUGINS_BUILT GLOBAL PROPERTY PLUGINS_BUILT)
+
+	foreach(target lmms ${PLUGINS_BUILT})
+		get_target_property(target_libs ${target} LINK_LIBRARIES)
+
+		foreach(lib ${target_libs})
+			if(TARGET ${lib} OR NOT IS_ABSOLUTE ${lib})
+				continue()
+			endif()
+
+			get_filename_component(lib_dir ${lib} PATH)
+			list(APPEND LIB_DIRS ${lib_dir})
+			if(lib MATCHES ".(lib|dll.a)$")
+				if(IS_DIRECTORY ${lib_dir}/../bin)
+					list(APPEND LIB_DIRS ${lib_dir}/../bin)
+				endif()
+				if(IS_DIRECTORY ${lib_dir}/bin)
+					list(APPEND LIB_DIRS ${lib_dir}/bin)
+				endif()
+			endif()
+		endforeach()
+	endforeach()
+
+	GET_COMPILER_SEARCH_DIR(COMPILER_SEARCH_DIRS)
+	LIST(APPEND LIB_DIRS ${COMPILER_SEARCH_DIRS})
+
+	LIST(REMOVE_DUPLICATES LIB_DIRS)
+
+	# Collect plugin files to inspect
+	FOREACH(PLUGIN ${PLUGINS_BUILT})
+		LIST(APPEND DEPLOY_TARGETS "$<TARGET_FILE:${PLUGIN}>")
+	ENDFOREACH()
+	# Create the list of files using file(GENERATE)
+	SET(DEPLOY_LIST_FILE "${CMAKE_CURRENT_BINARY_DIR}/filelist.txt")
+	FILE(GENERATE OUTPUT "${DEPLOY_LIST_FILE}" CONTENT "${DEPLOY_TARGETS}")
+
+	IF(LMMS_BUILD_LINUX)
+		FILE(DOWNLOAD "https://raw.githubusercontent.com/AppImage/AppImages/master/excludelist"
+			"${CMAKE_BINARY_DIR}/excludelist")
+		SET(additional_args INCLUDE_SYSTEM IGNORE_LIBS_FILE ${CMAKE_BINARY_DIR}/excludelist)
+	ELSEIF(LMMS_BUILD_WIN32)
+		SET(additional_args IGNORE_CASE IGNORE_LIBS_FILE ${CMAKE_CURRENT_LIST_DIR}/excludelist-win)
+		IF(CMAKE_CROSSCOMPILING)
+		SET(additional_args "${additional_args}" GP_TOOL objdump)
+		ENDIF()
+	ENDIF()
+
+	IF(LMMS_BUILD_WIN32)
+		SET(LMMS_DEP_DESTINATION ${BIN_DIR})
+		SET(PLUGIN_DEP_DESTINATION ${BIN_DIR})
+	ELSE()
+		SET(LMMS_DEP_DESTINATION ${LIB_DIR})
+		SET(PLUGIN_DEP_DESTINATION ${LIB_DIR})
+	ENDIF()
+
+	INSTALL(CODE "
+		INCLUDE(\"${CMAKE_SOURCE_DIR}/cmake/modules/InstallDependencies.cmake\")
+		# Install dependencies of lmms
+		INSTALL_DEPENDENCIES(
+			FILES ${BIN_DIR}/lmms${CMAKE_EXECUTABLE_SUFFIX}
+			DESTINATION ${LMMS_DEP_DESTINATION}
+			LIB_DIRS ${LIB_DIRS}
+			${additional_args}
+		)
+		# Install dependencies of plugins
+		FILE(READ \"${DEPLOY_LIST_FILE}\" DEPLOY_FILES)
+		INSTALL_DEPENDENCIES(
+			FILES \"\${DEPLOY_FILES}\"
+			DESTINATION \"${PLUGIN_DEP_DESTINATION}\"
+			LIB_DIRS ${LIB_DIRS} \"${BIN_DIR}\" \"${PLUGIN_DIR}\"
+			SEARCH_PATHS \"${BIN_DIR}\" \"${PLUGIN_DIR}\"
+			${additional_args}
+		)
+	")
+ENDIF()
+
+IF(LMMS_BUILD_APPLE)
+	INSTALL(CODE "EXECUTE_PROCESS(COMMAND chmod u+x ${CMAKE_BINARY_DIR}/install_apple.sh)")
+	INSTALL(CODE "EXECUTE_PROCESS(COMMAND ${CMAKE_BINARY_DIR}/install_apple.sh)")
+ENDIF()

cmake/install/excludelist-win

@@ -0,0 +1,23 @@
+# List of DLLs considered to be system libraries.
+# This is needed when cross-compiling for Windows.
+ADVAPI32.dll
+COMCTL32.dll
+comdlg32.dll
+dwmapi.dll
+GDI32.dll
+IMM32.dll
+KERNEL32.dll
+MPR.DLL
+msvcrt.dll
+ole32.dll
+OLEAUT32.dll
+OPENGL32.DLL
+SHELL32.dll
+USER32.dll
+UxTheme.dll
+VERSION.dll
+WINMM.DLL
+WS2_32.dll
+RPCRT4.dll
+dsound.dll
+SETUPAPI.dll

cmake/modules/BuildPlugin.cmake

@@ -62,7 +62,10 @@ MACRO(BUILD_PLUGIN PLUGIN_NAME)
 		TARGET_LINK_LIBRARIES(${PLUGIN_NAME} lmms)
 	ENDIF(LMMS_BUILD_WIN32)
 
-	INSTALL(TARGETS ${PLUGIN_NAME} DESTINATION "${PLUGIN_DIR}")
+	INSTALL(TARGETS ${PLUGIN_NAME}
+		LIBRARY DESTINATION "${PLUGIN_DIR}"
+		RUNTIME DESTINATION "${PLUGIN_DIR}"
+	)
 
 	IF(LMMS_BUILD_APPLE)
 		IF ("${PLUGIN_LINK}" STREQUAL "SHARED")
@@ -89,5 +92,8 @@ MACRO(BUILD_PLUGIN PLUGIN_NAME)
 	TARGET_INCLUDE_DIRECTORIES(${PLUGIN_NAME}
 		PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>
 	)
+
+	SET_PROPERTY(GLOBAL APPEND PROPERTY PLUGINS_BUILT ${PLUGIN_NAME})
+	GET_PROPERTY(PLUGINS_BUILT GLOBAL PROPERTY PLUGINS_BUILT)
 ENDMACRO(BUILD_PLUGIN)
 

cmake/modules/InstallDependencies.cmake

@@ -0,0 +1,184 @@
+include(GetPrerequisites)
+include(CMakeParseArguments)
+
+CMAKE_POLICY(SET CMP0011 NEW)
+CMAKE_POLICY(SET CMP0057 NEW)
+
+function(make_absolute var)
+	get_filename_component(abs "${${var}}" ABSOLUTE BASE_DIR "${CMAKE_INSTALL_PREFIX}")
+	set(${var} ${abs} PARENT_SCOPE)
+endfunction()
+
+# Reads lines of a file into a list, skipping '#' comment lines
+function(READ_LIST_FILE FILE VAR)
+	file(STRINGS "${FILE}" list)
+
+	set(result "")
+	foreach(item ${list})
+		string(STRIP "${item}" item)
+		if(item STREQUAL "" OR item MATCHES "^\#")
+			continue()
+		endif()
+		list(APPEND result "${item}")
+	endforeach()
+
+	set(${VAR} ${result} PARENT_SCOPE)
+endfunction()
+
+function(make_all_absolute list_var)
+	set(result "")
+	foreach(file ${${list_var}})
+		make_absolute(file)
+		list(APPEND result ${file})
+	endforeach()
+	set(${list_var} ${result} PARENT_SCOPE)
+endfunction()
+
+if(CMAKE_BINARY_DIR)
+	set(tmp_lib_dir "${CMAKE_BINARY_DIR}/bundled-libraries")
+elseif(CMAKE_HOST_UNIX)
+	set(tmp_lib_dir "/tmp/bundled-libraries")
+elseif(DEFINED ENV{TEMP})
+	set(tmp_lib_dir "$ENV{TMP}/bundled-libraries")
+else()
+	message(FATAL_ERROR "Can't find a temp dir for libraries")
+endif()
+
+# Like file(INSTALL), but resolves symlinks
+function(install_file_resolved file destination)
+
+	get_filename_component(file_name "${file}" NAME)
+	if(IS_SYMLINK "${file}")
+		get_filename_component(real_path "${file}" REALPATH)
+		get_filename_component(real_name "${real_path}" NAME)
+		file(COPY "${real_path}" DESTINATION "${tmp_lib_dir}")
+		file(RENAME "${tmp_lib_dir}/${real_name}" "${tmp_lib_dir}/${file_name}")
+		set(file_path "${tmp_lib_dir}/${file_name}")
+	else()
+		set(file_path "${file}")
+	endif()
+
+	file(INSTALL "${file_path}" DESTINATION "${destination}")
+endfunction()
+
+function(install_resolved)
+	cmake_parse_arguments("" "" "DESTINATION" "FILES" ${ARGN})
+	foreach(file ${_FILES})
+		install_file_resolved("${file}" "${_DESTINATION}")
+	endforeach()
+endfunction()
+
+if(CMAKE_CROSSCOMPILING)
+	# If we're cross-compiling, GetPrerequisites may not be able to find system libraries such as kernel32.dll because
+	# they're supplied by the toolchain. To suppress thousands of lines of warnings being printed to the console, we
+	# override gp_resolved_file_type to return "system" for any library in ${IGNORE_LIBS} without trying to resolve the
+	# file first.
+	# GetPrerequisites supports using an override function called gp_resolved_file_type_override, but it's not suited
+	# for our purpose because it's only called by gp_resolved_file_type *after* trying to resolve the file.
+	function(gp_resolved_file_type original_file file exepath dirs type_var)
+		set(file_find "${file}")
+		if(_IGNORE_CASE)
+			# On case-insensitive systems, convert to upper characters to respect it
+			string(TOUPPER "${file_find}" file_find)
+		endif()
+		SET(IGNORE_LIBS ${_IGNORE_LIBS} CACHE INTERNAL "Ignored library names" FORCE)
+		if(IGNORE_LIBS AND ${file_find} IN_LIST IGNORE_LIBS)
+			set(${type_var} system PARENT_SCOPE)
+		else()
+			#_gp_resolved_file_type(${ARGV})
+			_gp_resolved_file_type("${original_file}" "${file}" "${exepath}" "${dirs}" "${type_var}" ${ARGN})
+		endif()
+	endfunction()
+endif()
+
+function(INSTALL_DEPENDENCIES)
+	cmake_parse_arguments("" "INCLUDE_SYSTEM;IGNORE_CASE" "GP_TOOL;DESTINATION;IGNORE_LIBS_FILE" "FILES;LIB_DIRS;SEARCH_PATHS;IGNORE_LIBS" ${ARGN})
+
+	# Make paths absolute
+	make_absolute(_DESTINATION)
+	make_all_absolute(_FILES)
+	make_all_absolute(_LIB_DIRS)
+	make_all_absolute(_SEARCH_PATHS)
+
+	if(_INCLUDE_SYSTEM)
+		set(EXCLUDE_SYSTEM 0)
+	else()
+		set(EXCLUDE_SYSTEM 1)
+	endif()
+
+	if(_IGNORE_LIBS_FILE)
+		READ_LIST_FILE("${_IGNORE_LIBS_FILE}" _IGNORE_LIBS)
+		if(_IGNORE_CASE)
+			# On case-insensitive systems, convert to upper characters to respect it
+			string(TOUPPER "${_IGNORE_LIBS}" _IGNORE_LIBS)
+		endif()
+		SET(IGNORE_LIBS ${_IGNORE_LIBS} CACHE INTERNAL "Ignored library names" FORCE)
+	endif()
+
+	if(_GP_TOOL)
+		set(gp_tool "${_GP_TOOL}")
+	endif()
+
+	set(prereqs "")
+	foreach(file ${_FILES})
+		get_filename_component(file_name "${file}" NAME)
+		message("-- Finding prerequisites of ${file_name}")
+		find_prerequisites("${file}" _prereqs
+			${EXCLUDE_SYSTEM} # exclude system files
+			1 # recurse
+			""
+			"${_LIB_DIRS}"
+			"${_SEARCH_PATHS}"
+			"${_IGNORE_LIBS}"
+		)
+
+		list(APPEND prereqs ${_prereqs})
+	endforeach()
+
+	list(REMOVE_DUPLICATES prereqs)
+
+	foreach(prereq ${prereqs})
+		get_filename_component(prereq_name "${prereq}" NAME)
+
+		foreach(rpath ${_SEARCH_PATHS})
+			if(EXISTS "${rpath}/${prereq_name}")
+				list(REMOVE_ITEM prereqs "${prereq}")
+				break()
+			endif()
+		endforeach()
+	endforeach()
+
+	#file(INSTALL ${prereqs} DESTINATION ${_DESTINATION})
+	install_resolved(FILES ${prereqs} DESTINATION "${_DESTINATION}")
+endfunction()
+
+# Like get_prerequisites, but returns full paths
+function(FIND_PREREQUISITES target RESULT_VAR exclude_system recurse
+	exepath dirs rpaths)
+	set(RESULTS)
+
+	get_prerequisites("${target}" _prereqs ${exclude_system} ${recurse}
+                  "" "${dirs}" "${rpaths}")
+
+	foreach(prereq ${_prereqs})
+		get_filename_component(prereq_name "${prereq}" NAME)
+		if(_IGNORE_CASE)
+			# Windows is case insensitive.
+			# Use upper characters to respect it.
+			string(TOUPPER "${prereq_name}" prereq_name)
+		endif()
+		if("${prereq_name}" IN_LIST IGNORE_LIBS)
+			continue()
+		endif()
+
+		gp_resolve_item("${LIB_DLL}" "${prereq}" "" "${dirs}" RESOLVED_PREREQ "${rpaths}")
+
+		if(RESOLVED_PREREQ AND IS_ABSOLUTE ${RESOLVED_PREREQ} AND EXISTS ${RESOLVED_PREREQ})
+			list(APPEND RESULTS ${RESOLVED_PREREQ})
+		else()
+			message(FATAL_ERROR "Can't resolve dependency ${prereq}.")
+		endif()
+	endforeach()
+
+	set(${RESULT_VAR} ${RESULTS} PARENT_SCOPE)
+endfunction()

cmake/postinstall/CMakeLists.txt

@@ -1,4 +0,0 @@
-IF(LMMS_BUILD_APPLE)
-	INSTALL(CODE "EXECUTE_PROCESS(COMMAND chmod u+x ${CMAKE_BINARY_DIR}/install_apple.sh)")
-	INSTALL(CODE "EXECUTE_PROCESS(COMMAND ${CMAKE_BINARY_DIR}/install_apple.sh)")
-ENDIF()