Import buildroot 2016.02.01

firmware/buildroot/package/alsa-lib/0004-conditional-enabling-of-libdl-in-m4.patch

@@ -0,0 +1,35 @@
+alsa-lib: conditionally enable libdl in AM_PATH_ALSA m4 macro
+
+The AM_PATH_ALSA macro in utils/alsa.m4 unconditionally uses -ldl. This
+breaks compilation of alsa-utils (and probably other packages using this
+macro) for targets that do not support dynamic loading, such as for
+Blackfin FLAT binaries.
+
+This patch updates the macro to check if dlopen is available, and use that
+result to conditionally add -ldl to the list of libraries.
+
+Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
+
+---
+
+diff --git a/utils/alsa.m4 b/utils/alsa.m4
+--- a/utils/alsa.m4
++++ b/utils/alsa.m4
+@@ -44,6 +44,8 @@ if test "$alsa_inc_prefix" != "" ; then
+ fi
+ AC_MSG_RESULT($ALSA_CFLAGS)
+ 
++AC_CHECK_LIB(c, dlopen, LIBDL="", [AC_CHECK_LIB(dl, dlopen, LIBDL="-ldl")])
++
+ dnl add any special lib dirs
+ AC_MSG_CHECKING(for ALSA LDFLAGS)
+ if test "$alsa_prefix" != "" ; then
+@@ -52,7 +54,7 @@ if test "$alsa_prefix" != "" ; then
+ fi
+ 
+ dnl add the alsa library
+-ALSA_LIBS="$ALSA_LIBS -lasound -lm -ldl -lpthread"
++ALSA_LIBS="$ALSA_LIBS -lasound -lm $LIBDL -lpthread"
+ LIBS="$ALSA_LIBS $LIBS"
+ AC_MSG_RESULT($ALSA_LIBS)
+