CMake create and link 32bit and 64bit versions of library

CMake create and link 32bit and 64bit versions of library

To create and link both 32-bit and 64-bit versions of a library using CMake, you can use CMake's build system to generate and build both versions. Here's how you can do it:

1. Define Library Source Files:

Create your library source files. For example, let's say you have source files foo.cpp and bar.cpp.

2. Create CMakeLists.txt:

Create a CMakeLists.txt file in the root directory of your project. This file will define the build process.

cmake_minimum_required(VERSION 3.0) project(YourLibrary) # Define library source files set(SOURCES foo.cpp bar.cpp ) # Build 32-bit version set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32") add_library(YourLibrary32 ${SOURCES}) # Build 64-bit version set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m64") add_library(YourLibrary64 ${SOURCES})

3. Generate Build System:

Generate the build system using CMake. Make sure to specify the generator for the desired platform (e.g., Visual Studio for Windows, Makefiles for Unix-like systems).

For 32-bit version:

mkdir build32 cd build32 cmake -DCMAKE_BUILD_TYPE=Release -G "Unix Makefiles" ..

For 64-bit version:

mkdir build64 cd build64 cmake -DCMAKE_BUILD_TYPE=Release -G "Unix Makefiles" ..

4. Build the Library:

Build the library for both 32-bit and 64-bit platforms.

For 32-bit version:

cmake --build .

For 64-bit version:

cmake --build .

5. Link with Your Application:

In your application's CMakeLists.txt, you can link with both versions of the library.

add_executable(YourExecutable main.cpp) target_link_libraries(YourExecutable YourLibrary32 YourLibrary64)

By following these steps, you'll be able to create and link both 32-bit and 64-bit versions of your library using CMake. Adjust the paths and settings according to your specific project requirements and build environment.

Examples

  1. How to create a 32-bit and 64-bit version of a library using CMake?

    Description: This query seeks information on how to use CMake to generate both 32-bit and 64-bit versions of a library, enabling compatibility across different architectures.

    # Set output directory for 32-bit libraries set(CMAKE_LIBRARY_OUTPUT_DIRECTORY_32 ${CMAKE_BINARY_DIR}/lib32) # Set output directory for 64-bit libraries set(CMAKE_LIBRARY_OUTPUT_DIRECTORY_64 ${CMAKE_BINARY_DIR}/lib64) # Define library sources add_library(my_library ${SOURCES}) # Create 32-bit version set_target_properties(my_library PROPERTIES COMPILE_FLAGS "-m32" LINK_FLAGS "-m32") set_target_properties(my_library PROPERTIES ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_LIBRARY_OUTPUT_DIRECTORY_32}) # Create 64-bit version set_target_properties(my_library_64 PROPERTIES COMPILE_FLAGS "-m64" LINK_FLAGS "-m64") set_target_properties(my_library_64 PROPERTIES ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_LIBRARY_OUTPUT_DIRECTORY_64})

  2. CMake generate 32-bit and 64-bit libraries for Windows and Linux

    Description: This query seeks guidance on creating both 32-bit and 64-bit libraries using CMake, targeting both Windows and Linux platforms.

    if(WIN32) # Windows set(CMAKE_LIBRARY_ARCHITECTURE "x86") else() # Linux if(CMAKE_SIZEOF_VOID_P EQUAL 8) set(CMAKE_LIBRARY_ARCHITECTURE "x86_64") else() set(CMAKE_LIBRARY_ARCHITECTURE "x86") endif() endif() # Define library sources add_library(my_library ${SOURCES}) # Set output directory based on architecture set_target_properties(my_library PROPERTIES ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib/${CMAKE_LIBRARY_ARCHITECTURE}")

  3. Cross-compiling 32-bit and 64-bit libraries with CMake

    Description: This query addresses the process of cross-compiling libraries for both 32-bit and 64-bit architectures using CMake.

    set(CMAKE_SYSTEM_NAME Linux) set(CMAKE_SYSTEM_PROCESSOR i686) # For 32-bit # or set(CMAKE_SYSTEM_PROCESSOR x86_64) # For 64-bit # Define library sources add_library(my_library ${SOURCES}) # Specify compiler and linker for cross-compilation set(CMAKE_C_COMPILER "gcc") set(CMAKE_CXX_COMPILER "g++") # Specify target platform and architecture set(CMAKE_SYSROOT "/path/to/sysroot") set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER) set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY) set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY) # Set output directory for cross-compiled libraries set_target_properties(my_library PROPERTIES ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")

  4. Creating 32-bit and 64-bit libraries in CMake with Visual Studio

    Description: This query focuses on generating both 32-bit and 64-bit libraries using CMake specifically for Visual Studio projects.

    if(CMAKE_SIZEOF_VOID_P EQUAL 8) set(CMAKE_GENERATOR_PLATFORM x64) else() set(CMAKE_GENERATOR_PLATFORM Win32) endif() # Define library sources add_library(my_library ${SOURCES}) # Set output directory based on architecture set_target_properties(my_library PROPERTIES ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")

  5. CMake build 32-bit and 64-bit libraries with different configurations

    Description: This query delves into building libraries with distinct configurations for both 32-bit and 64-bit architectures using CMake.

    # Define library sources add_library(my_library ${SOURCES}) # Set output directory for 32-bit libraries set_target_properties(my_library PROPERTIES ARCHIVE_OUTPUT_DIRECTORY_32 "${CMAKE_BINARY_DIR}/lib32") # Set output directory for 64-bit libraries set_target_properties(my_library PROPERTIES ARCHIVE_OUTPUT_DIRECTORY_64 "${CMAKE_BINARY_DIR}/lib64")

  6. CMake compile library for both 32-bit and 64-bit in Visual Studio

    Description: This query focuses on compiling libraries for both 32-bit and 64-bit architectures within the Visual Studio environment using CMake.

    # Define library sources add_library(my_library ${SOURCES}) # Set output directory based on architecture set_target_properties(my_library PROPERTIES ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib") # Set Visual Studio solution configurations set_target_properties(my_library PROPERTIES VS_CONFIGURATION_TYPE Release) set_target_properties(my_library PROPERTIES VS_CONFIGURATION_TYPE_x64 Release)

  7. CMake build both 32-bit and 64-bit libraries on macOS

    Description: This query pertains to building libraries for both 32-bit and 64-bit architectures specifically on macOS using CMake.

    # Define library sources add_library(my_library ${SOURCES}) # Set output directory for 32-bit libraries set_target_properties(my_library PROPERTIES ARCHIVE_OUTPUT_DIRECTORY_32 "${CMAKE_BINARY_DIR}/lib32") # Set output directory for 64-bit libraries set_target_properties(my_library PROPERTIES ARCHIVE_OUTPUT_DIRECTORY_64 "${CMAKE_BINARY_DIR}/lib64")

  8. Cross-compiling 32-bit and 64-bit libraries with CMake for ARM

    Description: This query revolves around cross-compiling libraries for both 32-bit and 64-bit ARM architectures using CMake.

    set(CMAKE_SYSTEM_NAME Linux) set(CMAKE_SYSTEM_PROCESSOR arm) # For ARM # or set(CMAKE_SYSTEM_PROCESSOR aarch64) # For ARM64 # Define library sources add_library(my_library ${SOURCES}) # Specify compiler and linker for cross-compilation set(CMAKE_C_COMPILER "arm-linux-gnueabi-gcc") set(CMAKE_CXX_COMPILER "arm-linux-gnueabi-g++") # Specify target platform and architecture set(CMAKE_SYSROOT "/path/to/arm/sysroot") set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER) set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY) set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY) # Set output directory for cross-compiled libraries set_target_properties(my_library PROPERTIES ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")

  9. CMake build 32-bit and 64-bit libraries for iOS

    Description: This query addresses building libraries for both 32-bit and 64-bit architectures targeting iOS using CMake.

    set(CMAKE_SYSTEM_NAME iOS) set(CMAKE_SYSTEM_VERSION 14.0) set(CMAKE_OSX_ARCHITECTURES "arm64;x86_64") # Define library sources add_library(my_library ${SOURCES}) # Set output directory for 32-bit libraries set_target_properties(my_library PROPERTIES ARCHIVE_OUTPUT_DIRECTORY_32 "${CMAKE_BINARY_DIR}/lib32") # Set output directory for 64-bit libraries set_target_properties(my_library PROPERTIES ARCHIVE_OUTPUT_DIRECTORY_64 "${CMAKE_BINARY_DIR}/lib64")

  10. CMake build 32-bit and 64-bit libraries for Android

    Description: This query involves building libraries for both 32-bit and 64-bit architectures targeting Android using CMake.

    set(CMAKE_SYSTEM_NAME Android) set(CMAKE_SYSTEM_VERSION 29) # Define library sources add_library(my_library ${SOURCES}) # Set output directory for 32-bit libraries set_target_properties(my_library PROPERTIES ARCHIVE_OUTPUT_DIRECTORY_32 "${CMAKE_BINARY_DIR}/lib32") # Set output directory for 64-bit libraries set_target_properties(my_library PROPERTIES ARCHIVE_OUTPUT_DIRECTORY_64 "${CMAKE_BINARY_DIR}/lib64")

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