Fix dlvsym() detection in the configure script.

--ryan.


From: Mike Frysinger <vapier@gentoo.org>
To: sdl@libsdl.org
Subject: Re: [SDL] sdl, sdl-mixer not compiling with uclibc
Date: Wed, 7 Sep 2005 19:17:49 -0400

in this case actually, the error is in libsdl

the configure check for dlvsym presence is pretty pointless, it currently
always detects it

		AC_TRY_COMPILE([
		  #include <stdio.h>
		  #define __USE_GNU
		  #include <dlfcn.h>
		],[
		  dlvsym(NULL,"","");
		],[
		use_dlvsym=yes
		])

since it's merely compiling, the warning about dlvsym being implicitly
declared doesnt trigger a failure

find attached a patch to fix this
-mike

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401139

configure.in

@@ -313,18 +313,8 @@ CheckALSA()
                 CFLAGS="$CFLAGS -DALSA_SUPPORT -DALSA_DYNAMIC=\$(alsa_lib) $ALSA_CFLAGS"
                 AC_SUBST(alsa_lib)
 
-                AC_MSG_CHECKING(for dlvsym)
                 use_dlvsym=no
-                AC_TRY_COMPILE([
-                  #include <stdio.h>
-                  #define __USE_GNU
-                  #include <dlfcn.h>
-                ],[
-                  dlvsym(NULL,"","");
-                ],[
-                use_dlvsym=yes
-                ])
-                AC_MSG_RESULT($use_dlvsym);
+                AC_CHECK_LIB(dl, dlvsym, [use_dlvsym=yes])
                 if test x$use_dlvsym = xyes; then
                     CFLAGS="$CFLAGS -DUSE_DLVSYM"
                 fi