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c++buildcmakeautotoolsconfigure

Can CMake generate a configure file?

I need the configure file to transpile from C++ to JS, I'm trying to use emscripten in a project. Emscripten comes with a tool called emconfigure, that replaces the autoconf configure,

But the project I'm building uses cmake as build system and currently (Jan-12) emscripten has only support for autoconf - so I'm bypassing it by generating the configure and doing a port on the make, so there a way to create the configure file from the cmake ?? I'm not talking about the make files.. but the configure file itself.

Solution

  • Yes, it can: 

    configure_file(<input> <output>
               [COPYONLY] [ESCAPE_QUOTES] [@ONLY]
               [NEWLINE_STYLE [UNIX|DOS|WIN32|LF|CRLF] ])

    Example.h.in

    #ifndef EXAMPLE_H
#define EXAMPLE_H

/*
 * These values are automatically set according to their cmake variables.
 */
#define EXAMPLE "${EXAMPLE}"
#define VERSION "${VERSION}"
#define NUMBER  ${NUMBER}

#endif /* EXAMPLE_H */

    In your cmake file:

    set(EXAMPLE "This is an example")
set(VERSION "1.0")
set(NUMBER 3)

configure_file(Example.h.in Example.h)

    Configured Example.h:

    #ifndef EXAMPLE_H
#define EXAMPLE_H

/*
 * These values are automatically set according to their cmake variables.
 */
#define EXAMPLE "This is an example"
#define VERSION "1.0"
#define NUMBER  3

#endif /* EXAMPLE_H */

    Documentation: