KJ16609/fgl_cmake_modules
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Reduces debug executable size by stripping unused .data sections

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kj16609
2025-11-03 01:21:03 -05:00
parent 0cbd75a558
commit 7cf4225fe4
3 changed files with 37 additions and 8 deletions
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11
modules/compiler/flags.cmake
View File

@@ -5,14 +5,17 @@
endfunction()
function(SetFGLFlags TARGET)
GET_PROPERTY(FGL_FLAGS GLOBAL PROPERTY FGL_FLAGS)
target_compile_options(${TARGET} PUBLIC ${FGL_FLAGS})
message("Set target ${TARGET} to use flags\n${FGL_FLAGS}")
target_link_options(${TARGET} PUBLIC ${FGL_FLAGS})
GET_PROPERTY(FGL_COMPILE_FLAGS GLOBAL PROPERTY FGL_COMPILE_FLAGS)
GET_PROPERTY(FGL_LINKS_FLAGS GLOBAL PROPERTY FGL_LINK_FLAGS)
target_compile_options(${TARGET} PUBLIC ${FGL_COMPILE_FLAGS})
message("Set target ${TARGET} to use flags\n${FGL_COMPILE_FLAGS}")
target_link_options(${TARGET} PUBLIC ${FGL_LINK_FLAGS})
endfunction()
function(SetDependencyFlags TARGET)
GET_PROPERTY(FGL_CHILD_FLAGS GLOBAL PROPERTY FGL_CHILD_FLAGS)
GET_PROPERTY(FGL_LINKS_FLAGS GLOBAL PROPERTY FGL_LINK_FLAGS)
target_compile_options(${TARGET} PUBLIC ${FGL_CHILD_FLAGS})
message("Set dependency ${TARGET} to use flags\n${FGL_CHILD_FLAGS}")
target_link_options(${TARGET} PUBLIC ${FGL_LINK_FLAGS})
endfunction()

12
modules/compiler/gcc.cmake
View File

@@ -117,7 +117,7 @@
if (DEFINED FGL_ENABLE_UBSAN AND FGL_ENABLE_UBSAN EQUAL 1)
list(APPEND FGL_CONFIG "-fsanitize=undefined,address,leak,alignment,bounds,vptr")
# list(APPEND FGL_CONFIG "-fsanitize-trap")
# list(APPEND FGL_CONFIG "-fsanitize-trap")
endif ()
if (NOT DEFINED FGL_STATIC_ANALYSIS)
@@ -136,7 +136,10 @@
list(APPEND FGL_CONFIG "-ftree-vectorize")
list(APPEND FGL_CONFIG "-fmax-errors=2")
LIST(APPEND FGL_CONFIG "-std=c++23")
list(APPEND FGL_CONFIG "-std=c++23")
list(APPEND FGL_CONFIG "-fdata-sections")
list(APPEND FGL_CONFIG "-ffunction-sections")
#AppendWarningFlag("-fanalyzer")
#AppendWarningFlag("-Wanalyzer-too-complex")
@@ -160,7 +163,6 @@
list(APPEND FGL_SHARED_DEBUG "-gdwarf-4")
list(APPEND FGL_SHARED_DEBUG "-fvar-tracking-assignments")
# Optimization flags
set(FGL_FINAL_FLAGS_RELEASE "-O2;-s;${FGL_GENERAL_OPTIMIZATION_FLAGS};${FGL_SHARED_OPTIMIZATION_FLAGS}") # System agonistc flags
set(FGL_FINAL_FLAGS_RELWITHDEBINFO "-O2;${FGL_GENERAL_OPTIMIZATION_FLAGS};${FGL_SHARED_OPTIMIZATION_FLAGS};${FGL_SHARED_DEBUG}")
@@ -176,9 +178,11 @@
# Final sets
set(FGL_FLAGS "${FGL_CONFIG};${FGL_FINAL_FLAGS_${UPPER_BUILD_TYPE}};${FGL_WARNINGS}") # Flags for our shit
set(FGL_FLAGS "${FGL_OPTIMIZATION_FLAGS_${UPPER_BUILD_TYPE}}" PARENT_SCOPE)
set(FGL_CHILD_FLAGS "${FGL_FINAL_FLAGS_RELEASE}") # Child flags for adding optimization to anything we build ourselves but doesn't follow our standard
set(FGL_CHILD_FLAGS "${FGL_FINAL_FLAGS_RELEASE}" PARENT_SCOPE) # Child flags for adding optimization to anything we build ourselves but doesn't follow our standard
# We use release flags since we really don't need to be using debug flags for anything not ours
set(FGL_LINK_FLAGS "-Wl,--gcc-sections;-Wl,--print-gc-sections" PARENT_SCOPE)
SET_PROPERTY(GLOBAL PROPERTY FGL_FLAGS ${FGL_FLAGS})
SET_PROPERTY(GLOBAL PROPERTY FGL_CHILD_FLAGS ${FGL_CHILD_FLAGS})

22
modules/helpers.cmake
View File

@@ -26,6 +26,17 @@ function(ConfigureFGLTarget NAME SRC_DIR INCLUDE_DIR)
target_compile_features(${NAME} PUBLIC cxx_std_23)
endfunction()
function(SplitDebugSymbols NAME)
if (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
add_custom_command(TARGET ${NAME} POST_BUILD
COMMAND ${CMAKE_OBJCOPY} --only-keep-debug $<TARGET_FILE:${NAME}> $<TARGET_FILE:${NAME}>.debug
COMMAND ${CMAKE_STRIP} --strip-debug --strip-unneeded $<TARGET_FILE:${NAME}>
COMMAND ${CMAKE_OBJCOPY} --add-gnu-debuglink=$<TARGET_FILE:${NAME}>.debug $<TARGET_FILE:${NAME}>
COMMENT "Stripping symbols and creating ${NAME}.debug"
)
endif ()
endfunction()
function(AddFGLExecutable NAME SRC_SOURCES_LOCATION)
file(GLOB_RECURSE SOURCES CONFIGURE_DEPENDS
${SRC_SOURCES_LOCATION}/**.cpp
@@ -46,6 +57,9 @@ function(AddFGLExecutable NAME SRC_SOURCES_LOCATION)
SetFGLFlags(${NAME})
AddGitInfo(${NAME})
target_compile_definitions(${NAME} PRIVATE FGL_BUILD_TYPE="${CMAKE_BUILD_TYPE}")
SplitDebugSymbols(${NAME})
endfunction()
function(AddFGLLibrary NAME MODE SRC_SOURCES_LOCATION INCLUDE_SOURCES_LOCATION)
@@ -65,6 +79,10 @@ function(AddFGLLibrary NAME MODE SRC_SOURCES_LOCATION INCLUDE_SOURCES_LOCATION)
SetFGLFlags(${NAME})
AddGitInfo(${NAME})
target_compile_definitions(${NAME} PRIVATE FGL_BUILD_TYPE="${CMAKE_BUILD_TYPE}")
if (NOT "${MODE}" STREQUAL "OBJECT")
SplitDebugSymbols(${NAME})
endif ()
endfunction()
function(AddFGLModule NAME SRC_SOURCES_LOCATION)
@@ -75,6 +93,8 @@ function(AddFGLModule NAME SRC_SOURCES_LOCATION)
SetFGLFlags(${NAME})
AddGitInfo(${NAME})
target_compile_definitions(${NAME} PRIVATE FGL_BUILD_TYPE="${CMAKE_BUILD_TYPE}")
SplitDebugSymbols(${NAME})
endfunction()
function(AddFGLChildLibrary NAME MODE SRC_SOURCES_LOCATION INCLUDE_SOURCES_LOCATION)
@@ -85,4 +105,6 @@ function(AddFGLChildLibrary NAME MODE SRC_SOURCES_LOCATION INCLUDE_SOURCES_LOCAT
target_include_directories(${NAME} PUBLIC ${INCLUDE_SOURCES_LOCATION})
target_include_directories(${NAME} PRIVATE ${SRC_SOURCES_LOCATION})
ConfigureFGLTarget(${NAME} ${SRC_SOURCES_LOCATION} ${INCLUDE_SOURCES_LOCATION})
SplitDebugSymbols(${NAME})
endfunction()