We will use the following C file (example.c) to print the version information:
#include "version.h"#include <stdio.h>int main() { printf("This is output from code %s\n", PROJECT_VERSION); printf("Major version number: %i\n", PROJECT_VERSION_MAJOR); printf("Minor version number: %i\n", PROJECT_VERSION_MINOR); printf("Hello CMake world!\n");}
Here, we assume that PROJECT_VERSION_MAJOR, PROJECT_VERSION_MINOR, and PROJECT_VERSION are defined in version.h. Our goal is to generate version.h from the following scaffold, version.h.in:
#pragma once#define PROJECT_VERSION_MAJOR @PROJECT_VERSION_MAJOR@#define PROJECT_VERSION_MINOR @PROJECT_VERSION_MINOR@#define PROJECT_VERSION_PATCH @PROJECT_VERSION_PATCH@#define PROJECT_VERSION "v@PROJECT_VERSION@" ...
