6b13f685e
 김민수
BSP 최초 추가
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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)
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