From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Petazzoni Date: Tue, 9 Jul 2013 12:50:37 +0200 Subject: [Buildroot] Buildroot compilation using uClibc and activating bluez In-Reply-To: <747C1E83C744F44E9ACFB89FAEEC2C7B2423BF9923@EXDCVYMBSTM005.EQ1STM.local> References: <747C1E83C744F44E9ACFB89FAEEC2C7B2423BF9923@EXDCVYMBSTM005.EQ1STM.local> Message-ID: <20130709125037.0a4e0077@skate> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Dear Julien COUVRAND, On Tue, 9 Jul 2013 10:57:13 +0200, Julien COUVRAND wrote: > I would like to enable Bluez packages using uClibc but i meet some dependencies with MMU. > We can't enable bluez-utils package while MMU is deactivated. > > As soon as i compile Buildroot deactivating MMU dependencies into Config.in from bluez-utils package such as: > > -- > config BR2_PACKAGE_BLUEZ_UTILS > bool "bluez-utils" > depends on !BR2_avr32 > depends on BR2_USE_WCHAR # libglib2 > depends on BR2_TOOLCHAIN_HAS_THREADS # dbus, alsa-lib > # depends on BR2_USE_MMU # dbus > select BR2_PACKAGE_DBUS > select BR2_PACKAGE_LIBGLIB2 > help > bluez utils > -- > > I have got following compilation errors: > > -- > >../dbus/.libs/libdbus-internal.a(libdbus_internal_la-dbus-sysdeps-util-unix.o): In function `_dbus_become_daemon': > > dbus-sysdeps-util-unix.c:(.text+0x530): undefined reference to `fork' > > ../dbus/.libs/libdbus-internal.a(libdbus_internal_la-dbus-spawn.o): In function `_dbus_spawn_async_with_babysitter': > > dbus-spawn.c:(.text+0xe38): undefined reference to `fork' > > dbus-spawn.c:(.text+0xea0): undefined reference to `fork' > > collect2: error: ld returned 1 exit status > > make[3]: *** [dbus-daemon] Error 1 > > make[3]: *** Waiting for unfinished jobs.... > > ../dbus/.libs/libdbus-internal.a(libdbus_internal_la-dbus-sysdeps-util-unix.o): In function `_dbus_become_daemon': > > dbus-sysdeps-util-unix.c:(.text+0x530): undefined reference to `fork' > > collect2: error: ld returned 1 exit status > > make[3]: *** [dbus-daemon-launch-helper] Error 1 > -- > > So, currently, using uclibc for bluez, without MMU activation, I can't compile Buildroot due dBus and the "fork". > Does it exist a way to enable bluez using uClibc avoiding Dbus issues? Well, as you've seen, bluez requires DBus (it's a mandatory dependency), and DBus uses fork(). Maybe it's possible to build and make DBus work on non-MMU platform by patching it to not use fork(). Maybe you want to check the Blackfin Buildroot repository at http://blackfin.uclinux.org/git/?p=buildroot;a=shortlog to see if they have dbus patches in package/dbus/ to make it work on non-MMU platforms. If they do, don't hesitate to integrate it in Buildroot, and send us a patch to make DBus work on non-MMU platforms. Thanks! Thomas -- Thomas Petazzoni, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com