From 178fe66bc88c6ccdd3b90195e7178293d368a83b Mon Sep 17 00:00:00 2001 From: Thomas De Schampheleire Date: Thu, 1 Nov 2018 15:40:07 +0100 Subject: [PATCH] utils/alsa.m4: conditionally enable libdl in AM_PATH_ALSA m4 macro MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 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. 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 Signed-off-by: Jörg Krause Signed-off-by: Thomas Petazzoni Signed-off-by: Takashi Iwai --- 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) -- 2.47.1