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I am writing a (my first) C++ class on top of some code written in C, but I can only get the C++ to compile by declaring the C functions in a extern block. My project uses autotools; is there any way to automate this process so I don't have to maintain two header files?
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Autotools configurationThis file is used by autoconf to create the configure shell script that users run before building. The file must contain, at the very least, the AC_INIT and AC_OUTPUT M4 macros.
To create a configure script with Autoconf, you need to write an Autoconf input file configure.ac (or configure.in ) and run autoconf on it. If you write your own feature tests to supplement those that come with Autoconf, you might also write files called aclocal. m4 and acsite. m4 .
The autogen.sh script generates the configure script (from configure.ac , using autoconf) and any files it needs (like creating Makefile.in from Makefile.am using automake).
Use a extern block inside a #ifdef in C codes header files
Start of header files
#ifdef __cplusplus
extern "C" {
#endif
...and at end of the header files
#ifdef __cplusplus
}
#endif
This way it will work for being included in both C and C++ sources
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