[Buildroot] [PATCH v2] dbus: use -pthread instead of -lpthread

Vicente Olivert Riera Vincent.Riera at imgtec.com
Tue Jul 1 09:52:36 UTC 2014

This fixes a problem in other packages when they link against dbus. For
instance, with the dnsmasq package:

/buildroot/output/host/usr/bin/mipsel-ctng-linux-uclibc-gcc --static
-lidn  -o dnsmasq cache.o rfc1035.o util.o option.o forward.o network.o
dnsmasq.o dhcp.o lease.o rfc2131.o netlink.o dbus.o bpf.o helper.o
tftp.o log.o conntrack.o dhcp6.o rfc3315.o dhcp-common.o outpacket.o
radv.o slaac.o auth.o ipset.o domain.o dnssec.o blockdata.o
-ldbus-1 -lpthread
-lidn -liconv
-llua -lm     -Wl,-Bstatic -lhogweed
-lnettle -lgmp   -Wl,-Bdynamic -Wl,-Bstatic -lgmp -Wl,-Bdynamic
In function `__pthread_initialize_minimal_internal':
init.c:(.text+0x26c): undefined reference to `__libc_setup_tls'
collect2: error: ld returned 1 exit status
make[2]: *** [dnsmasq] Error 1
make[2]: Leaving directory

When dnsmasq tries to link against dbus it checks the dbus pkgconfig
file to obtain the LIBS that it need to pass to the linker. In the dbus
.pc file you have "-ldbus-1 -lpthread" because -lpthread was used when
building dbus. If you use -pthread when you build dbus, then you will
have -pthread in the dbus .pc file as well.

-lpthread means that we want to link with a library called pthread.
-pthread is a compiler option which will do whatever is needed to be
done to compile with the pthreads standards so that it works.


Signed-off-by: Vicente Olivert Riera <Vincent.Riera at imgtec.com>
 package/dbus/dbus.mk |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/package/dbus/dbus.mk b/package/dbus/dbus.mk
index fc446b1..0c8fcf3 100644
--- a/package/dbus/dbus.mk
+++ b/package/dbus/dbus.mk
@@ -35,7 +35,7 @@ define DBUS_USERS
 ifeq ($(BR2_PREFER_STATIC_LIB),y)
-DBUS_CONF_OPT += LIBS='-lpthread'
+DBUS_CONF_OPT += LIBS='-pthread'
 ifeq ($(BR2_microblaze),y)

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