At Tue, 21 Nov 2006 18:18:24 +0100,
I wrote:
>
> At Tue, 21 Nov 2006 09:58:01 -0600,
> r10 kindsofpeople wrote:
> >
> > I'm further along on my goal, but now even more confused.
> >
> > Benoit's comment about 'plug-ins' sparked the thought that, since my
> > interest is in midi, not audio, I could try --disable-pcm. This turned out
> > to be insufficient, but combined with --disable-mixer, alsa-lib now builds
> > without the -ldl errors.
> >
> > This turned out to be a small victory, however. When I try to link my
> > application with the resulting asound library, I'm back to having pthread
> > and dl undefined references, and also snd_pcm_async among others. The
> > application only makes 'snd_seq*' calls, but I haven't tried tracing them to
> > see what they call.
>
> Does the patch below fix the references?
In addition, the following patch may work for you.
The configure checks libdl and libpthread. Together with
--with-softfloat option, all three libs will be disabled.
Give it a try.
Takashi
diff -r 1c84c4d3c803 configure.in
--- a/configure.in Thu Nov 16 07:49:24 2006 +0100
+++ b/configure.in Tue Nov 21 18:44:28 2006 +0100
@@ -147,6 +147,23 @@ else
else
AC_MSG_RESULT(no)
fi
+
+AC_CHECK_LIB([dl], [dlsym], [HAVE_LIBDL="yes"])
+AC_CHECK_LIB([pthread], [pthread_join], [HAVE_LIBPTHREAD="yes"])
+
+ALSA_DEPLIBS=""
+if test "$softfloat" != "yes"; then
+ ALSA_DEPLIBS="-lm"
+fi
+if test "$HAVE_LIBDL" = "yes"; then
+ ALSA_DEPLIBS="$ALSA_DEPLIBS -ldl"
+ AC_DEFINE([HAVE_LIBDL], 1, [Have libdl])
+fi
+if test "$HAVE_LIBPTHREAD" = "yes"; then
+ ALSA_DEPLIBS="$ALSA_DEPLIBS -lpthread"
+ AC_DEFINE([HAVE_LIBPTHREAD], 1, [Have libpthread])
+fi
+AC_SUBST(ALSA_DEPLIBS)
dnl Check for architecture
AC_MSG_CHECKING(for architecture)
diff -r 1c84c4d3c803 src/Makefile.am
--- a/src/Makefile.am Thu Nov 16 07:49:24 2006 +0100
+++ b/src/Makefile.am Tue Nov 21 18:24:07 2006 +0100
@@ -41,7 +41,7 @@ libasound_la_LIBADD += alisp/libalisp.la
libasound_la_LIBADD += alisp/libalisp.la
endif
SUBDIRS += compat conf
-libasound_la_LIBADD += compat/libcompat.la -lm -ldl -lpthread
+libasound_la_LIBADD += compat/libcompat.la @ALSA_DEPLIBS@
libasound_la_LDFLAGS = -version-info $(COMPATNUM) $(VSYMS)
diff -r 1c84c4d3c803 src/dlmisc.c
--- a/src/dlmisc.c Thu Nov 16 07:49:24 2006 +0100
+++ b/src/dlmisc.c Tue Nov 21 18:42:40 2006 +0100
@@ -53,13 +53,19 @@ void *snd_dlopen(const char *name, int m
if (name == NULL)
return &snd_dlsym_start;
#else
+#ifdef HAVE_LIBDL
if (name == NULL) {
Dl_info dlinfo;
if (dladdr(snd_dlopen, &dlinfo) > 0)
name = dlinfo.dli_fname;
}
#endif
+#endif
+#ifdef HAVE_LIBDL
return dlopen(name, mode);
+#else
+ return NULL;
+#endif
}
/**
@@ -76,7 +82,11 @@ int snd_dlclose(void *handle)
if (handle == &snd_dlsym_start)
return 0;
#endif
+#ifdef HAVE_LIBDL
return dlclose(handle);
+#else
+ return 0;
+#endif
}
/**
@@ -91,6 +101,7 @@ int snd_dlclose(void *handle)
*/
static int snd_dlsym_verify(void *handle, const char *name, const char *version)
{
+#ifdef HAVE_LIBDL
int res;
char *vname;
@@ -107,6 +118,9 @@ static int snd_dlsym_verify(void *handle
if (res < 0)
SNDERR("unable to verify version for symbol %s", name);
return res;
+#else
+ return 0;
+#endif
}
/**
@@ -139,10 +153,14 @@ void *snd_dlsym(void *handle, const char
return NULL;
}
#endif
+#ifdef HAVE_LIBDL
err = snd_dlsym_verify(handle, name, version);
if (err < 0)
return NULL;
return dlsym(handle, name);
+#else
+ return NULL;
+#endif
}
/*
diff -r 1c84c4d3c803 utils/alsa.pc.in
--- a/utils/alsa.pc.in Thu Nov 16 07:49:24 2006 +0100
+++ b/utils/alsa.pc.in Tue Nov 21 18:30:07 2006 +0100
@@ -8,7 +8,7 @@ Version: @VERSION@
Version: @VERSION@
Requires:
Libs: -L${libdir} -lasound
-Libs.private: -lm -ldl -lpthread
+Libs.private: @ALSA_DEPLIBS@
# -I${includedir}/alsa below is just for backward compatibility
# (it was set so mistakely in the older version)
Cflags: -I${includedir} -I${includedir}/alsa
-------------------------------------------------------------------------
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