Geek Answers Handbook

Cannot export cmake PROJECT_VERSION_MAJOR because it is zero

I am having problems exporting cmake PROJECT_VERSION_MAJORto a file config.h. In my main CMakeLists.txtI set this variable according to the cmake documentation, calling project()in the main file CMakeLists.txt:

cmake_minimum_required(VERSION 3.2.2)
cmake_policy(SET CMP0048 NEW)

set(PROJECT "SampleName")

project(${PROJECT}
    VERSION "0.0.0")

configure_file(${CMAKE_SOURCE_DIR}/cmake/config.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config.h)

Through configure_file()invokation I am trying to export some cmake variables to a header file config.h. Please see mine config.h.cmake.file:

#ifndef CONFIG_H
#define CONFIG_H

#cmakedefine PROJECT "@PROJECT@"

#cmakedefine PROJECT_VERSION "@PROJECT_VERSION@"

#cmakedefine PROJECT_VERSION_MAJOR "@PROJECT_VERSION_MAJOR@"

#cmakedefine PROJECT_VERSION_MINOR "@PROJECT_VERSION_MINOR@"

#cmakedefine PROJECT_VERSION_PATCH "@PROJECT_VERSION_PATCH@"

#endif

After running the command cmake ..in my build directory it is config.hcreated, but it looks something like this:

#ifndef CONFIG_H
#define CONFIG_H

#define PROJECT "SampleName"

#define PROJECT_VERSION "0.0.0"

/* #undef PROJECT_VERSION_MAJOR */

/* #undef PROJECT_VERSION_MINOR */

/* #undef PROJECT_VERSION_PATCH */

#endif

I assume the reason for this behavior is a note in the cmake documentation for the function configure_file():

, @VAR@ ${VAR} . , . , :

#cmakedefine VAR ...

:

#define VAR ...

/* #undef VAR */

, VAR CMake , if(). "..." , , , , . #cmakedefine01 VAR #define VAR 1 #define VAR 0.

, cmake PROJECT_VERSION_MAJOR , ? PROJECT_VERSION define ?

hank :

#ifndef CONFIG_H
#define CONFIG_H

#define PROJECT "SampleName"

#define PROJECT_VERSION "0.0.0"

#define PROJECT_VERSION_MAJOR "0"

#define PROJECT_VERSION_MINOR "0"

#define PROJECT_VERSION_PATCH "0"

#endif
+4
1

, #cmakedefine. #define:

#ifndef CONFIG_H
#define CONFIG_H

#define PROJECT "@PROJECT@"

#define PROJECT_VERSION "@PROJECT_VERSION@"

#define PROJECT_VERSION_MAJOR "@PROJECT_VERSION_MAJOR@"

#define PROJECT_VERSION_MINOR "@PROJECT_VERSION_MINOR@"

#define PROJECT_VERSION_PATCH "@PROJECT_VERSION_PATCH@"

#endif
+3

More articles:


All Articles