Improve CPack deb generation

CMakeLists.txt

@@ -5,6 +5,7 @@ include(CMakeDependentOption)
 include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/DAPSS.cmake)
 include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/DebugOpts.cmake)
 include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/VerifyBoostDynamic.cmake)
+include(GNUInstallDirs)
 
 # Set C++ standard
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
@@ -19,6 +20,13 @@ endif()
 # Compiler flags
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -pedantic")
 
+# Ensure installed directories use Debian-standard permissions instead of
+# inheriting group-writable bits from the build tree.
+set(CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS
+	OWNER_READ OWNER_WRITE OWNER_EXECUTE
+	GROUP_READ GROUP_EXECUTE
+	WORLD_READ WORLD_EXECUTE)
+
 # Mind oscillator configuration
 set(MIND_VOSCILLATOR_PERIOD_MS 33 CACHE STRING "Mind's virtual osc clock rate (ms)")
 if(NOT MIND_VOSCILLATOR_PERIOD_MS GREATER 0)
@@ -210,21 +218,29 @@ if(ENABLE_TESTS)
     add_subdirectory(tests)
 endif()
 
-install(TARGETS salmanoff DESTINATION bin)
+install(TARGETS salmanoff DESTINATION ${CMAKE_INSTALL_BINDIR})
 
 # Install device configuration files (preprocessed .daps files)
 install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/devices/
-    DESTINATION share/salmanoff/devices
+    DESTINATION ${CMAKE_INSTALL_DATADIR}/salmanoff/devices
+	DIRECTORY_PERMISSIONS
+		OWNER_READ OWNER_WRITE OWNER_EXECUTE
+		GROUP_READ GROUP_EXECUTE
+		WORLD_READ WORLD_EXECUTE
+	FILE_PERMISSIONS
+		OWNER_READ OWNER_WRITE
+		GROUP_READ
+		WORLD_READ
     FILES_MATCHING PATTERN "*.daps"
 )
 
 # Install documentation
-install(FILES README.md DESTINATION share/doc/salmanoff)
-install(FILES LICENSE DESTINATION share/doc/salmanoff)
+install(FILES README.md DESTINATION ${CMAKE_INSTALL_DOCDIR})
+install(FILES LICENSE DESTINATION ${CMAKE_INSTALL_DOCDIR})
 
 # Install example configurations if they exist
 if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/examples")
-    install(DIRECTORY examples/ DESTINATION share/salmanoff/examples)
+    install(DIRECTORY examples/ DESTINATION ${CMAKE_INSTALL_DATADIR}/salmanoff/examples)
 endif()
 
 # Include CPack configuration