CMake Intro - CMakeLists.txt

Notes:  directory structure:  cmake, cmake/Tutorial, cmake/Tutorial/MathLibs

1. File lists in cmake/Tutorial

CMakeLists.txt

TutorialConfig.h.in

tutorial.cxx

2. File lists in cmake/Tutorial/MathLibs

CMakeLists.txt

MathLibs.h

mysqrt.cxx

3. cmake/Tutorial/CMakeLists.txt

cmake_minimum_required (VERSION 2.6)

project (Tutorial)

# The version number.

set (Tutorial_VERSION_MAJOR 1)

set (Tutorial_VERSION_MINOR 0)

set(CMAKE_BUILD_TYPE DEBUG)

set(CMAKE_C_FLAGS "-O0 -ggdb")

set(CMAKE_C_FLAGS_DEBUG "-O0 -ggdb")

set(CMAKE_C_FLAGS_RELEASE "-O3")

set(CMAKE_CXX_FLAGS "-O0 -ggdb")

set(CMAKE_CXX_FLAGS_DEBUG "-O0 -ggdb")

set(CMAKE_CXX_FLAGS_RELEASE "-O3")

# configure a header file to pass some of the CMake settings

# to the source code

configure_file (

"${PROJECT_SOURCE_DIR}/TutorialConfig.h.in"

"${PROJECT_SOURCE_DIR}/TutorialConfig.h"

)

# add the binary tree to the search path for include files

# so that we will find TutorialConfig.h

include_directories("${PROJECT_SOURCE_DIR}")

# should we use our own math functions?

option (USE_MYMATH

"Use tutorial provided math implementation" ON)

# add the MathFunctions library?

#

if (USE_MYMATH)

include_directories ("${PROJECT_SOURCE_DIR}/MathLibs")

add_subdirectory (MathLibs)

set (EXTRA_LIBS ${EXTRA_LIBS} MathLibs)

endif (USE_MYMATH)

# add the executable

add_executable (Tutorial.x tutorial.cxx)

target_link_libraries (Tutorial.x  ${EXTRA_LIBS})

4. cmake/Tutorial/MathLibs/CMakeLists.txt

add_library(MathLibs mysqrt.cxx)

5. Configure and Compile

do so  in cmake directory as the followings

cmake -DUSE_MYMATH=on Tutorial

make