| Цитата(proc_maker @ 22.9.2010, 13:05) | Всем привет!
Как получить строку в коде C++ из опции cmake говорящей ему куда ставить пакет?
Например, если я запускаю:
cmake CMAKE_INSTALL_PREFIX=/tmp ..
потом
make
то во время компиляции хочется каким-то образом получить со значением которое я передал через CMAKE_INSTALL_PREFIX, т.е.
Спасибо заранее,
Дмитрий |
Решение делается через CMake
Вот пример решения -
config.h.in
| Код |
#ifndef __CONFIG_H
#define __CONFIG_H
// This line will be parsed by cmake and replaced to install prefix of project
#define INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}"
#endif // __CONFIG_H
|
main.c
| Код |
// System includes
#include <stdio.h>
// Internal project includes
#include "config.h"
// Program Enter Point
int main(int argc, char** argv) {
// Print our install prefix
printf("%s\r\n", INSTALL_PREFIX);
return 0;
}
|
CMakeLists.txt
| Код |
cmake_minimum_required(VERSION 2.6)
# project name
SET(PROJECT_NAME "test")
# configuration file
SET(CONFIG_FILE "config.h.in")
# Sources
SET(project_SOURCES main.c)
# this line will configure our config file and replace all CMAKE variables to correct ones
CONFIGURE_FILE(${CONFIG_FILE} config.h)
# we need to include BUILD directory for including just compiled config.h
INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR})
# compile our test
add_executable(${PROJECT_NAME} ${project_SOURCES})
|
Пример использования
| Код |
/work/test # mkdir build
/work/test # cd build/
/work/test/build # cmake .. -DCMAKE_INSTALL_PREFIX=/tmp
-- The C compiler identification is GNU
-- The CXX compiler identification is GNU
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Configuring done
-- Generating done
-- Build files have been written to: /work/test/build
/work/test/build # make
Scanning dependencies of target test
[100%] Building C object CMakeFiles/test.dir/main.c.o
Linking C executable test
[100%] Built target test
/work/test/build # ./test
/tmp
|
Надеюсь помог.
|