Mercurial > sdl-ios-xcode
diff configure.in @ 865:92615154bb68
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.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 02 Mar 2004 12:49:16 +0000 |
| parents | d3165b90ee42 |
| children | e805075f6d94 |
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--- a/configure.in Tue Mar 02 12:45:22 2004 +0000 +++ b/configure.in Tue Mar 02 12:49:16 2004 +0000 @@ -295,8 +295,22 @@ AC_CHECK_LIB(asound, snd_pcm_open, have_alsa=yes) ]) if test x$have_alsa = xyes; then - CFLAGS="$CFLAGS -DALSA_SUPPORT" - SYSTEM_LIBS="$SYSTEM_LIBS -lasound" + AC_ARG_ENABLE(alsa-shared, +[ --enable-alsa-shared dynamically load ALSA audio support [default=yes]], + , enable_alsa_shared=yes) + alsa_lib=`ls /usr/lib/libasound.so.* | head -1 | sed 's/.*\/\(.*\)/\1/'` + if test x$use_dlopen != xyes && \ + test x$enable_alsa_shared = xyes; then + AC_MSG_ERROR([You must have dlopen() support and use the --enable-dlopen option]) + fi + if test x$use_dlopen = xyes && \ + test x$enable_alsa_shared = xyes && test x$alsa_lib != x; then + CFLAGS="$CFLAGS -DALSA_SUPPORT -DALSA_DYNAMIC=\$(alsa_lib)" + AC_SUBST(alsa_lib) + else + CFLAGS="$CFLAGS -DALSA_SUPPORT" + SYSTEM_LIBS="$SYSTEM_LIBS -lasound" + fi AUDIO_SUBDIRS="$AUDIO_SUBDIRS alsa" AUDIO_DRIVERS="$AUDIO_DRIVERS alsa/libaudio_alsa.la" else