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-rw-r--r--package/alsa-lib/0003-alsa-lib-conditionally-enable-libdl-in-AM_PATH_ALSA-.patch48
1 files changed, 48 insertions, 0 deletions
diff --git a/package/alsa-lib/0003-alsa-lib-conditionally-enable-libdl-in-AM_PATH_ALSA-.patch b/package/alsa-lib/0003-alsa-lib-conditionally-enable-libdl-in-AM_PATH_ALSA-.patch
new file mode 100644
index 0000000000..181e56deb4
--- /dev/null
+++ b/package/alsa-lib/0003-alsa-lib-conditionally-enable-libdl-in-AM_PATH_ALSA-.patch
@@ -0,0 +1,48 @@
+From 2aba563bd077fda94fb9c2c33002ee0ac119b345 Mon Sep 17 00:00:00 2001
+From: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
+Date: Fri, 13 Apr 2018 09:13:46 +0200
+Subject: [PATCH] alsa-lib: conditionally enable libdl in AM_PATH_ALSA m4 macro
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+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>
+[Jörg: update for 1.1.6]
+Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
+---
+ utils/alsa.m4 | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/utils/alsa.m4 b/utils/alsa.m4
+index e12310df..a5c5a292 100644
+--- 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)
+
+--
+2.14.3
+