Es schrieb Clinton Roy: > > > > my_config.h: config.h > > > sed 's/#define /#define MY_/; s/#undef /#undef MY_/' <config.h >$@ > > It would appear I can air my dirty code :) > > We define some of our own defines, that are already prefixed, so we > have to take care of the case of double prefixing. We also wrap the > header in an `#ifndef PREFIX_CONFIG_H; #define PREFIX_CONFIG_H ; > #endif' so we don't have to worry about multiple inclusion. > > Finally: > > config.h: _config.h > echo "#ifndef PREFIX_CONFIG_H" > $(output) > echo "#define PREFIX_CONFIG_H" >> $(output) > sed -e 's/#define /#define PREFIX_/' \ > -e 's/#undef /#undef PREFIX_/' \ > -e 's/PREFIX_PREFIX_/PREFIX_/' < $(input) >> $(output) > echo "#endif /* PREFIX_CONFIG_H */" >> $(output) > > Pretty icky, but it does get the job done. >
yes, that was my first shot too ;-) - it's seems to be the canonical answer to the problem we have to handle and it seems to be a very common approach to get the job done. just a hint: after doing some projects with the first attempt of the prefix-macro, I noticed it would be better to prefix lowercase entries in config.h with a lowercased prefix, so that for example off_t maps to my_off_t and const maps to my_const. These examples are also the case for wrapping the generated my-config.h into another my-conf.h that looks like: #ifdef _MSC_VER #include <msvc-conf.h> #else #include <my-config.h> #endif #ifndef my_off_t #define my_off_t off_t #endif after here, all the library headers include my-conf.h and use the my_off_t entry for the function declarations. well, one might call these just cosmetics but I think it looks better, or perhaps just *hmmm* more professional *giggle*. have fun, -- guido http://freespace.sf.net/guidod GCS/E/S/P C++/++++$ ULHS L++w- N++@ d(+-) s+a- r+@>+++ y++ 5++X- (geekcode)
