make-event-config.sed

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Author : Philip Prindeville
Date : 2018-04-18 15:09:35
Hash : 587e9f58
Message : config.h can't be prefixed unconditionally The script make-event-config.sed was mangling all the symbols by prefixing them with "EVENT__". The problem here is that some symbols aren't for local consumption within libevent, but rather influence other system header files (ex: __USE_FILE_OFFSET64 is used by dozens of header files including <sys/sendfile.h>). As a workaround, all symbols starting with a capital letter only (with the exception of STDC_HEADERS which must also be left untouched) will be mangled. Future contributors will need to be aware of this distinction.

make-event-config.sed

# Sed script to postprocess config.h into event-config.h.

1i\
/* event2/event-config.h\
 *\
 * This file was generated by autoconf when libevent was built, and post-\
 * processed by Libevent so that its macros would have a uniform prefix.\
 *\
 * DO NOT EDIT THIS FILE.\
 *\
 * Do not rely on macros in this file existing in later versions.\
 */\
\
#ifndef EVENT2_EVENT_CONFIG_H_INCLUDED_\
#define EVENT2_EVENT_CONFIG_H_INCLUDED_\

$a\
\
#endif /* event2/event-config.h */

/#\( *\)undef STDC_HEADERS\>/b
/#\( *\)define STDC_HEADERS\>/b

# Only rewrite symbols starting with capitals
s/#\( *\)define \([A-Z]\)/#\1define EVENT__\2/
s/#\( *\)undef \([A-Z]\)/#\1undef EVENT__\2/
s/#\( *\)if\(n*\)def \([A-Z]\)/#\1if\2def EVENT__\2/

kc3-lang/libevent/make-event-config.sed

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kc3-lang/libevent /make-event-config.sed