On Fri, 2006-08-18 at 15:01 +0200, Katharina Denkinger wrote: > Has anyone an idea how to code following macro: Yes. It can be found in every decent C tutorial: > #define INIT() \ > #ifdef THREDSAFE \ > lock_mutex() \ > #endif \ #ifdef THREDSAFE #define INIT() lock_mutex() #else #define INIT() #endif > The error ist that after a # operator there is an parameter expected. > The normal escape doesn't help in this case. Yes. The preprocessor replace INIT() with the #ifdef stuff and the (real) C compiler (which uses the preprocessors output) barfs on #ifdef. Bernd -- Firmix Software GmbH http://www.firmix.at/ mobil: +43 664 4416156 fax: +43 1 7890849-55 Embedded Linux Development and Services -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
