utils/alsa.m4: 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.
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>
Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Thomas De Schampheleire authored 5 years ago
Takashi Iwai committed 5 years ago
| 43 | 43 | fi |
| 44 | 44 | AC_MSG_RESULT($ALSA_CFLAGS) |
| 45 | 45 | |
| 46 | AC_CHECK_LIB(c, dlopen, LIBDL="", [AC_CHECK_LIB(dl, dlopen, LIBDL="-ldl")]) | |
| 47 | ||
| 46 | 48 | dnl add any special lib dirs |
| 47 | 49 | AC_MSG_CHECKING(for ALSA LDFLAGS) |
| 48 | 50 | if test "$alsa_prefix" != "" ; then |
| 51 | 53 | fi |
| 52 | 54 | |
| 53 | 55 | dnl add the alsa library |
| 54 | ALSA_LIBS="$ALSA_LIBS -lasound -lm -ldl -lpthread" | |
| 56 | ALSA_LIBS="$ALSA_LIBS -lasound -lm $LIBDL -lpthread" | |
| 55 | 57 | LIBS="$ALSA_LIBS $LIBS" |
| 56 | 58 | AC_MSG_RESULT($ALSA_LIBS) |
| 57 | 59 | |