Date: Sun, 29 Feb 2004 15:14:22 +0200 From: Martin_Storsj Subject: Dynamic loading of ALSA I recently discovered that SDL can dynamically load ESD and aRts, and made a patch which adds this same functionality to ALSA. The update for configure.in isn't too good (it should e.g. look for libasound.so in other directories than /usr/lib), because I'm not too good at shellscripting and autoconf. The reason for using dlfcn.h and dlopen instead of SDL_LoadLibrary and SDL_LoadFunction is that libasound uses versioned symbols, and it is necessary to load the correct version using dlvsym. This isn't probably any real portability issue, because ALSA is linux-only.

#!/usr/bin/perl
#
# Program to take a set of header files and generate DLL export definitions

while ( ($file = shift(@ARGV)) ) {
	if ( ! defined(open(FILE, $file)) ) {
		warn "Couldn't open $file: $!\n";
		next;
	}
	$printed_header = 0;
	$file =~ s,.*/,,;
	while (<FILE>) {
		if ( / DECLSPEC.*SDLCALL ([^\s\(]+)/ ) {
			print "\t$1\n";
		}
	}
	close(FILE);
}
# Special exports not in the header files
print "\tSDL_InitQuickDraw\n";