CODEWITHSUNDEEP
cmake
Yami OG
Yami OG

Reputation: 77

CMake Fails To Compile "relocation R_X86_64_PC32 against symbol"

I am trying to make a portable framework library that works between Linux and Windows, however whenever I compile my code on Linux I keep running into an error:

"/usr/bin/ld: ../extern/SDL2_ttf/libSDL2_ttf.a(SDL_ttf.c.o): relocation R_X86_64_PC32 against symbol `TTF_CloseFont' can not be used when making a shared object; recompile with -fPIC"

This error doesn't occur on Windows only on Linux. I am totally lost on how to fix it as nothing has worked except for removing SHARED from add_library which removed DLLs and makes my code unusable. If you have any ideas on how to fix this please comment below. Thanks in advance!

Main CMakeList.txt

add_subdirectory(extern)

cmake_minimum_required(VERSION 3.7)

set(CMAKE_POSITION_INDEPENDENT_CODE ON)
set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)

set(PROJECT_NAME Project)

project(${PROJECT_NAME} VERSION 0.1.0)

add_subdirectory(src)

Source CMakeList.txt

file(GLOB HEADER_FILES "${CMAKE_SOURCE_DIR}/include/*.h")
file(GLOB SOURCES "*.cpp")

file(GLOB EXTERN_SOURCES "${CMAKE_SOURCE_DIR}/extern/stb/include/*.h" "${CMAKE_SOURCE_DIR}/extern/stb/src/*.cpp" )

include_directories(${PROJECT_NAME} PUBLIC "${CMAKE_SOURCE_DIR}/include/Chassis2D" PUBLIC "${CMAKE_SOURCE_DIR}/extern/SDL2/include/" PUBLIC "${CMAKE_SOURCE_DIR}/extern/SDL2_ttf" PUBLIC "${CMAKE_SOURCE_DIR}/extern/stb/include/")

add_library(${PROJECT_NAME} SHARED ${SOURCES} ${HEADER_FILES} ${EXTERN_SOURCES})

target_link_libraries(${PROJECT_NAME} PUBLIC SDL2 SDL2_ttf box2d soloud)

set_target_properties( ${PROJECT_NAME}
    PROPERTIES
    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/lib"
    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/lib"
    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/bin"
)

External Libraries CMakeList.txt

set(SDL_STATIC OFF)
add_subdirectory(SDL2)
add_library(SDL2::SDL2 ALIAS SDL2)

add_subdirectory(freetype)
add_library(Freetype::Freetype ALIAS freetype)

add_subdirectory(SDL2_ttf)

set(SOLOUD_BACKEND_COREAUDIO OFF)
set(SOLOUD_BACKEND_OPENSLES OFF)
set(SOLOUD_BACKEND_XAUDIO2 OFF)
set(SOLOUD_BACKEND_WINM OFF)
set(SOLOUD_BACKEND_WASAPI OFF)
set(SDL2_INCLUDE_DIR "${CMAKE_SOURCE_DIR}/extern/SDL2/include")
add_subdirectory(SoLoud/contrib)

add_subdirectory(Box2D)

Upvotes: 1

Views: 1206

Answers (1)

Corristo
Corristo

Reputation: 5510

CMAKE_POSITION_INDEPENDENT_CODE only influences targets defined after it has been set. However, you're setting CMAKE_POSITION_INDEPENDENT_CODE to ON after including the extern subdirectory, which is why the external libraries are not built with position-independent code.

Upvotes: 2

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