SDL:do not build alsa-lib:target

1. building alsa-lib:target for platforms that do not support alsa
  is dangerous and there are side-effects (lirc linked against nonexistent
  libasound.so and maybe more). so fix autoreconf instead.

2. we build SDL without alsa so alsa check in configure.ac is nonsense anyway

packages/multimedia/SDL/package.mk

@@ -25,7 +25,7 @@ PKG_SITE="http://www.libsdl.org/"
 PKG_URL="http://www.libsdl.org/release/$PKG_NAME-$PKG_VERSION.tar.gz"
 PKG_DEPENDS_HOST=""
 PKG_DEPENDS_TARGET="alsa-lib"
-PKG_BUILD_DEPENDS_HOST="toolchain yasm:host alsa-lib" # todo: hack: autoreconf depends on alsa-lib's m4 files, so build here
+PKG_BUILD_DEPENDS_HOST="toolchain yasm:host"
 PKG_BUILD_DEPENDS_TARGET="toolchain yasm:host alsa-lib"
 PKG_PRIORITY="optional"
 PKG_SECTION="multimedia"

packages/multimedia/SDL/patches/SDL-1.2.15-alsa-meh.patch

@@ -0,0 +1,68 @@
+From 5bdb0f83add08b47b577e3f4b9c12685a77b7a5b Mon Sep 17 00:00:00 2001
+From: Stefan Saraev <stefan@saraev.ca>
+Date: Wed, 22 Jan 2014 23:12:17 +0200
+Subject: [PATCH] alsa? meh
+
+---
+ configure.in |   38 --------------------------------------
+ 1 files changed, 0 insertions(+), 38 deletions(-)
+
+diff --git a/configure.in b/configure.in
+index 48369ef..c03f5fc 100644
+--- a/configure.in
++++ b/configure.in
+@@ -355,43 +355,6 @@ AC_HELP_STRING([--enable-oss], [support the OSS audio API [[default=yes]]]),
+     fi
+ }
+ 
+-dnl See if the ALSA audio interface is supported
+-CheckALSA()
+-{
+-    AC_ARG_ENABLE(alsa,
+-AC_HELP_STRING([--enable-alsa], [support the ALSA audio API [[default=yes]]]),
+-                  , enable_alsa=yes)
+-    if test x$enable_audio = xyes -a x$enable_alsa = xyes; then
+-        AM_PATH_ALSA(0.9.0, have_alsa=yes, have_alsa=no)
+-        # Restore all flags from before the ALSA detection runs
+-        CFLAGS="$alsa_save_CFLAGS"
+-        LDFLAGS="$alsa_save_LDFLAGS"
+-        LIBS="$alsa_save_LIBS"
+-        if test x$have_alsa = xyes; then
+-            AC_ARG_ENABLE(alsa-shared,
+-AC_HELP_STRING([--enable-alsa-shared], [dynamically load ALSA audio support [[default=yes]]]),
+-                          , enable_alsa_shared=yes)
+-            alsa_lib=[`find_lib "libasound.so.*" "$ALSA_LIBS" | sed 's/.*\/\(.*\)/\1/; q'`]
+-
+-            AC_DEFINE(SDL_AUDIO_DRIVER_ALSA)
+-            SOURCES="$SOURCES $srcdir/src/audio/alsa/*.c"
+-            EXTRA_CFLAGS="$EXTRA_CFLAGS $ALSA_CFLAGS"
+-            if test x$have_loadso != xyes && \
+-               test x$enable_alsa_shared = xyes; then
+-                AC_MSG_WARN([You must have SDL_LoadObject() support for dynamic ALSA loading])
+-            fi
+-            if test x$have_loadso = xyes && \
+-               test x$enable_alsa_shared = xyes && test x$alsa_lib != x; then
+-                echo "-- dynamic libasound -> $alsa_lib"
+-                AC_DEFINE_UNQUOTED(SDL_AUDIO_DRIVER_ALSA_DYNAMIC, "$alsa_lib")
+-            else
+-                EXTRA_LDFLAGS="$EXTRA_LDFLAGS $ALSA_LIBS"
+-            fi
+-            have_audio=yes
+-        fi
+-    fi
+-}
+-
+ dnl Check whether we want to use IRIX 6.5+ native audio or not
+ CheckDMEDIA()
+ {
+@@ -2367,7 +2330,6 @@ case "$host" in
+         CheckOSS
+         CheckDMEDIA
+         CheckMME
+-        CheckALSA
+         CheckARTSC
+         CheckESD
+         CheckPulseAudio
+-- 
+1.7.2.5
+