At Sat, 17 Mar 2007 03:13:06 -0700 (PDT), Ciaccia wrote: > > Hi Takashi, > I downloaded the last snapshot from hg > (alsa-lib-hg20070317) and I applied the patch you > included in your email. Then I configured alsa-lib as > following: > > ./configure --enable-static --disable-shared > --disable-mixer --disable-hwdep --disable-rawmidi > --disable-seq --disable-instr --disable-alisp > -with-pcm-plugins=no > > > I just need PCM, so I disable all the packages but > PCM. Then I compiled my mini application (just > snd_pcm_open, configure it and write some data to it) > with the following command-line (I'm using gcc 4.1): > > $ gcc -o test test.c > -L/tmp/alsa-lib-hg20070317/src/.libs/ -lasound -lm > -lpthread -static > > and I got the following errors/warnings: > > /tmp/alsa-lib-hg20070317/src/.libs//libasound.a(control_shm.o): > In function `_snd_ctl_shm_open': > /tmp/alsa-lib-hg20070317/src/control/control_shm.c:664: > warning: Using 'gethostbyname' in statically linked > applications requires at runtime the shared libraries > from the glibc version used for linking > /tmp/alsa-lib-hg20070317/src/.libs//libasound.a(dlmisc.o): > In function `snd_dlsym_verify': > /tmp/alsa-lib-hg20070317/src/dlmisc.c:115: undefined > reference to `dlsym' > /tmp/alsa-lib-hg20070317/src/.libs//libasound.a(dlmisc.o): > In function `snd_dlsym': > /tmp/alsa-lib-hg20070317/src/dlmisc.c:159: undefined > reference to `dlsym' > /tmp/alsa-lib-hg20070317/src/.libs//libasound.a(dlmisc.o): > In function `snd_dlclose': > /tmp/alsa-lib-hg20070317/src/dlmisc.c:85: undefined > reference to `dlclose' > /tmp/alsa-lib-hg20070317/src/.libs//libasound.a(dlmisc.o): > In function `snd_dlopen': > /tmp/alsa-lib-hg20070317/src/dlmisc.c:64: undefined > reference to `dlopen' > collect2: ld returned 1 exit status > > Am I doing something wrong?!? No. But, as you find in my patch, the configure checks whether libdl and pthread are available and doesn't provide the flag to disable them. That's why these functions are still there. Note that the concept of dynamic loading doesn't conflict with static library. So, unconditionally disabling libdl with a static lib is a bad idea. Rather we can add options to disable libdl and libpthread, not only detecting them. Takashi > > Thanks > Bye > Andrea > > --- Takashi Iwai <tiwai@xxxxxxx> wrote: > > > At Fri, 16 Mar 2007 06:17:00 -0700 (PDT), > > Ciaccia wrote: > > > > > > Hi there, > > > I would like to compile an alsa application for an > > > embedded system with no shared-libraries support. > > My > > > application just needs PCM, with no plug-ins, no > > mixer > > > and no midi and the application should be a > > standalone > > > executable with no external dependencies, > > otherwise it > > > will not work. > > > > > > I tried to compile alsa-lib with static support, > > but > > > without luck (-ldl is always needed in the gcc > > line > > > and gcc always prints some weird warnings). Since > > I > > > don't need external plugins nor ladspa, I think > > there > > > should be a way to compile an application in a > > 100% > > > static manner, but I still have to figure out how. > > > > > > I also found this thread with a similar problem > > with > > > uClinux > > > > > > http://www.mail-archive.com/alsa-user@xxxxxxxxxxxxxxxxxxxxx/msg18253.html > > > but at the end I did not understand how/if the > > problem > > > was solved. > > > > > > Do you think it should be possible to compile > > alsa-lib > > > with no dependencies on dl? How? > > > > > > Otherwise, would it be possible to write an alsa > > > application that does not rely on alsa-lib (i.e., > > > by using the alsa kernel APIs directly)? Has > > someone > > > already tried it? Some hints? > > > > > > Every hint is extremely welcome > > > > I worked on this sometime ago, and made a patch to > > build alsa-lib > > without pthread and libdl. I don't remember why > > this wasn't applied. > > IIRC, ulibc has the wrappers for pthread and libdl, > > so this wasn't > > needed at that time in the end. > > > > Otherwise, it should work. Build with > > --enable-static > > --disable-shared, --disble-mixer, --disable-hwdep, > > etc. > > > > > > Takashi > > > > diff -r f1203eb7eb48 configure.in > > --- a/configure.in Tue Mar 13 10:44:28 2007 +0100 > > +++ b/configure.in Fri Mar 16 15:07:51 2007 +0100 > > @@ -148,6 +148,23 @@ 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 f1203eb7eb48 include/local.h > > --- a/include/local.h Tue Mar 13 10:44:28 2007 +0100 > > +++ b/include/local.h Fri Mar 16 15:07:51 2007 +0100 > > @@ -36,6 +36,11 @@ > > #include "config.h" > > #ifdef SUPPORT_RESMGR > > #include <resmgr.h> > > +#endif > > +#ifdef HAVE_LIBDL > > +#include <dlfcn.h> > > +#else > > +#define RTLD_NOW 0 > > #endif > > > > #define _snd_config_iterator list_head > > diff -r f1203eb7eb48 src/Makefile.am > > --- a/src/Makefile.am Tue Mar 13 10:44:28 2007 +0100 > > +++ b/src/Makefile.am Fri Mar 16 15:07:51 2007 +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 f1203eb7eb48 src/async.c > > --- a/src/async.c Tue Mar 13 10:44:28 2007 +0100 > > +++ b/src/async.c Fri Mar 16 15:07:51 2007 +0100 > > @@ -151,9 +151,11 @@ int > > snd_async_del_handler(snd_async_hand > > if (!list_empty(&handler->hlist)) > > goto _end; > > switch (handler->type) { > > +#ifdef BUILD_PCM > > case SND_ASYNC_HANDLER_PCM: > > err = snd_pcm_async(handler->u.pcm, -1, 1); > > break; > > +#endif > > case SND_ASYNC_HANDLER_CTL: > > err = snd_ctl_async(handler->u.ctl, -1, 1); > > break; > > diff -r f1203eb7eb48 src/conf.c > > --- a/src/conf.c Tue Mar 13 10:44:28 2007 +0100 > > +++ b/src/conf.c Fri Mar 16 15:07:51 2007 +0100 > > @@ -415,12 +415,13 @@ beginning:</P> > > > > > > #include <stdarg.h> > > -#include <dlfcn.h> > > #include <limits.h> > > #include <sys/stat.h> > > -#include <pthread.h> > > #include <locale.h> > > #include "local.h" > > +#ifdef HAVE_LIBPTHREAD > > +#include <pthread.h> > > +#endif > > > > #ifndef DOC_HIDDEN > > > > @@ -3080,7 +3081,9 @@ int > > snd_config_update_r(snd_config_t **_ > > return 1; > > } > > > > +#ifdef HAVE_LIBPTHREAD > > static pthread_mutex_t snd_config_update_mutex = > > PTHREAD_MUTEX_INITIALIZER; > > +#endif > > > > /** > > * \brief Updates #snd_config by rereading the > > global configuration files (if needed). > > @@ -3099,9 +3102,13 @@ int snd_config_update(void) > > { > > int err; > > > > +#ifdef HAVE_LIBPTHREAD > > pthread_mutex_lock(&snd_config_update_mutex); > > +#endif > > err = snd_config_update_r(&snd_config, > > &snd_config_global_update, NULL); > > +#ifdef HAVE_LIBPTHREAD > > pthread_mutex_unlock(&snd_config_update_mutex); > > +#endif > > return err; > > } > > > > @@ -3128,15 +3135,18 @@ int > > snd_config_update_free(snd_config_up > > */ > > int snd_config_update_free_global(void) > > { > > +#ifdef HAVE_LIBPTHREAD > > pthread_mutex_lock(&snd_config_update_mutex); > > +#endif > > if (snd_config) > > snd_config_delete(snd_config); > > snd_config = NULL; > > if (snd_config_global_update) > > snd_config_update_free(snd_config_global_update); > > snd_config_global_update = NULL; > > > === message truncated === > > > > > ____________________________________________________________________________________ > Bored stiff? 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