cmake: build dll game with sub cmake to use different compilation flags

Author: illwieckz

CMakeLists.txt

@@ -191,7 +191,7 @@ option(USE_STATIC_LIBS "Tries to use static libs where possible. Only works for
 
 # Game VM modules are built with a recursive invocation of CMake, by which all the configuration
 # options are lost, except ones we explicitly choose to pass.
-set(DEFAULT_NACL_VM_INHERITED_OPTIONS
+set(DEFAULT_VM_INHERITED_OPTIONS
     BE_VERBOSE
     BUILD_CGAME
     BUILD_SGAME
@@ -202,15 +202,16 @@ set(DEFAULT_NACL_VM_INHERITED_OPTIONS
     USE_COMPILER_INTRINSICS
     USE_DEBUG_OPTIMIZE
     USE_HARDENING
+    USE_LTO
     USE_PEDANTIC
     USE_PRECOMPILED_HEADER
     USE_RECOMMENDED_C_STANDARD
     USE_RECOMMENDED_CXX_STANDARD
     USE_WERROR
 )
-set(NACL_VM_INHERITED_OPTIONS "${DEFAULT_NACL_VM_INHERITED_OPTIONS}" CACHE STRING
-    "Semicolon-separated list of options for which NaCl game VMs should use the same value as the other binaries")
-mark_as_advanced(NACL_VM_INHERITED_OPTIONS)
+set(VM_INHERITED_OPTIONS "${DEFAULT_VM_INHERITED_OPTIONS}" CACHE STRING
+    "Semicolon-separated list of options for which game VMs should use the same value as the other binaries")
+mark_as_advanced(VM_INHERITED_OPTIONS)
 
 ################################################################################
 # Directories

cmake/DaemonFlags.cmake

@@ -335,13 +335,19 @@ else()
 		try_c_cxx_flag(WSTACK_PROTECTOR "-Wstack-protector")
 
 		if (NOT NACL OR (NACL AND GAME_PIE))
-			try_c_cxx_flag(FPIE "-fPIE")
-			if (NOT APPLE)
-				try_linker_flag(LINKER_PIE "-pie")
+			if (FORK EQUAL 2 AND BUILD_GAME_NATIVE_DLL AND (BUILD_CGAME OR BUILD_SGAME))
+				try_c_cxx_flag(FPIC "-fPIC")
+				try_linker_flag(LINKER_PIC "-pic")
+			else()
+				try_c_cxx_flag(FPIE "-fPIE")
+
+				if (NOT APPLE)
+					try_linker_flag(LINKER_PIE "-pie")
+				endif()
 			endif()
 		endif()
 
-		if ("${FLAG_LINKER_PIE}" AND MINGW)
+		if ("${FLAG_shared_LINKER_PIE}" AND MINGW)
 			# https://github.com/msys2/MINGW-packages/issues/4100
 			if (ARCH STREQUAL "i686")
 				set_linker_flag("-Wl,-e,_mainCRTStartup")