Add sampling profiler build option (#411)

Options.cmake

@@ -13,6 +13,7 @@ option(SPICE_LTO "Enable link time optimization (LTO) for the compiler executabl
 if (SPICE_LTO)
     message(STATUS "Spice: LTO for Spice is enabled.")
     SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -flto")
+    SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -flto")
     SET(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -flto")
 else()
     message(STATUS "Spice: LTO for Spice is disabled.")
@@ -23,11 +24,23 @@ option(SPICE_DEV_COMPILE "Developer-only option" OFF)
 if(SPICE_DEV_COMPILE)
     message(STATUS "Spice: Dev build for Spice is enabled.")
     SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -fuse-ld=lld -ffunction-sections -fdata-sections")
+    SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -fuse-ld=lld -ffunction-sections -fdata-sections")
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections")
 else()
     message(STATUS "Spice: Dev build for Spice is disabled.")
 endif()
 
+# Profiler build option (for sampling profilers like perf)
+option(SPICE_PROF_COMPILE "Profiler build for Spice" OFF)
+if(SPICE_PROF_COMPILE)
+    message(STATUS "Spice: Profiler build for Spice is enabled.")
+    SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -fno-omit-frame-pointer -O0")
+    SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -fno-omit-frame-pointer -O0")
+    SET(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_DEBUG} -fno-omit-frame-pointer -O0")
+else()
+    message(STATUS "Spice: Profiler build for Spice is disabled.")
+endif()
+
 # Link statically
 option(SPICE_LINK_STATIC "Link the compiler executable statically" OFF)
 if (SPICE_LINK_STATIC)
@@ -53,6 +66,8 @@ option(SPICE_RUN_ASAN "Run address sanitizer on executable" OFF)
 if (SPICE_RUN_ASAN)
     message(STATUS "Spice: Address sanitizer enabled.")
     SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -fsanitize=address")
+    SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -fsanitize=address")
+    SET(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -fsanitize=address")
 else()
     message(STATUS "Spice: Address sanitizer disabled.")
 endif()