All different versions of libnl can cohexist on a system (libnl-1, libnl-2, libnl-3.0, libnl-3.1 and libnl-3.2). When multiple versions are installed only link against the highest versioned one, otherwise there might be unpredictable results (including segmentation faults).
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7bd7f7d in genl_unregister () from /usr/lib64/libnl-genl.so.3
(gdb) where
#0 0x00007ffff7bd7f7d in genl_unregister () from /usr/lib64/libnl-genl.so.3
#1 0x00007ffff7de9c17 in _dl_fini () at dl-fini.c:254
#2 0x00007ffff7433c01 in __run_exit_handlers (status=0, listp=0x7ffff77b06b8, run_list_atexit=run_list_atexit@entry=true) at exit.c:78
#3 0x00007ffff7433c85 in __GI_exit (status=<optimized out>) at exit.c:100
#4 0x00007ffff741ba4c in __libc_start_main (main=0x401c20 <main>, argc=1, ubp_av=0x7fffffffe368, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe358) at libc-start.c:258
#5 0x0000000000401f61 in _start () at ../sysdeps/x86_64/elf/start.S:113
This is the simplest (v1) patch which fixes the Makefile. A slightly more elaborate modification (v2) also allows to manually select the desired nl library version by passing the appropriate NLLIBNAME, CFLAGS and LIBS variables to make.
Signed-off-by: Guido Trentalancia <[email protected]>
---
Makefile | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
--- iw-3.4/Makefile 2012-03-29 11:05:04.000000000 +0200
+++ iw-3.4-multiple-libnl-installations/Makefile 2012-06-02 16:53:25.621169916 +0200
@@ -33,30 +33,30 @@ NLLIBNAME = libnl-1
endif
ifeq ($(NL2FOUND),Y)
-CFLAGS += -DCONFIG_LIBNL20
-LIBS += -lnl-genl
+CFLAGS = -DCONFIG_LIBNL20
+LIBS = -lnl-genl
NLLIBNAME = libnl-2.0
endif
ifeq ($(NL3xFOUND),Y)
# libnl 3.2 might be found as 3.2 and 3.0
NL3FOUND = N
-CFLAGS += -DCONFIG_LIBNL30
-LIBS += -lnl-genl-3
+CFLAGS = -DCONFIG_LIBNL30
+LIBS = -lnl-genl-3
NLLIBNAME = libnl-3.0
endif
ifeq ($(NL3FOUND),Y)
-CFLAGS += -DCONFIG_LIBNL30
-LIBS += -lnl-genl
+CFLAGS = -DCONFIG_LIBNL30
+LIBS = -lnl-genl
NLLIBNAME = libnl-3.0
endif
# nl-3.1 has a broken libnl-gnl-3.1.pc file
# as show by pkg-config --debug --libs --cflags --exact-version=3.1 libnl-genl-3.1;echo $?
ifeq ($(NL31FOUND),Y)
-CFLAGS += -DCONFIG_LIBNL30
-LIBS += -lnl-genl
+CFLAGS = -DCONFIG_LIBNL30
+LIBS = -lnl-genl
NLLIBNAME = libnl-3.1
endif