[LTP] "check_for_unshare.c" build failed

["Mitani" <mitani@ryobi.co.jp>]

Hi,


I tried to build LTP modules from following git:

   "Fix make filed,, reported by Shi Weihua <shiwh@cn.fujitsu.com>"
   (ltp-dev-c962f51674b971496e14ac4be0cc75da98b75fca.tar.gz)

But I failed to build "check_for_unshare.c" in RHEL5.4 system 
(2.6.18-164.el5).

------------
<...>
gcc -g -O2 -g -O2 -fno-strict-aliasing -pipe -Wall  -I../../../include
-I../../../include   -L../../../lib  check_for_unshare.c   -o
check_for_unshare
/tmp/ccWzyOQO.o: In function `main':
/home/mitani/LTP/ltp-dev-20100310/testcases/kernel/containers/check_for_unsh
are.c:40: undefined reference to `dlopen'
/home/mitani/LTP/ltp-dev-20100310/testcases/kernel/containers/check_for_unsh
are.c:46: undefined reference to `dlerror'
/home/mitani/LTP/ltp-dev-20100310/testcases/kernel/containers/check_for_unsh
are.c:47: undefined reference to `dlsym'
/home/mitani/LTP/ltp-dev-20100310/testcases/kernel/containers/check_for_unsh
are.c:48: undefined reference to `dlerror'
/home/mitani/LTP/ltp-dev-20100310/testcases/kernel/containers/check_for_unsh
are.c:53: undefined reference to `dlclose'
/home/mitani/LTP/ltp-dev-20100310/testcases/kernel/containers/check_for_unsh
are.c:42: undefined reference to `dlerror'
collect2: ld returned 1 exit status
make[3]: *** [check_for_unshare] Error 1
<...>
------------


I think that "-ldl" is needed in options.
I tried to build using "-ldl" option and succeeded.

------------
[root@RHEL54-INTEL64-GUIDE-APDB2-AP containers]# gcc -g -O2 -g -O2 -ldl
-fno-strict-aliasi
ng -pipe -Wall  -I../../../include -I../../../include   -L../../../lib
check_for_unshare.
c   -o check_for_unshare
[root@RHEL54-INTEL64-GUIDE-APDB2-AP containers]# echo $?
0
[root@RHEL54-INTEL64-GUIDE-APDB2-AP containers]# ll
total 60
-rw-rw-r-- 1 root root  1396 Mar 10 01:23 Makefile
-rw-rw-r-- 1 root root  1386 Mar 10 01:23 Makefile.inc
-rw-rw-r-- 1 root root  3286 Mar 10 01:23 README
-rw-rw-r-- 1 root root  1451 Mar 10 01:23 TEST_PLAN.txt
-rwxr-xr-x 1 root root 10805 Mar 10 15:18 check_for_unshare
-rw-rw-r-- 1 root root  1634 Mar 10 01:23 check_for_unshare.c
-rwxrwxr-x 1 root root  1712 Mar 10 01:23 container_test.sh
drwxrwxr-x 2 root root  4096 Mar 10 10:42 libclone
drwxrwxr-x 2 root root  4096 Mar 10 01:23 mqns
drwxrwxr-x 2 root root  4096 Mar 10 01:23 netns
drwxrwxr-x 2 root root  4096 Mar 10 01:23 pidns
drwxrwxr-x 2 root root  4096 Mar 10 01:23 sysvipc
drwxrwxr-x 2 root root  4096 Mar 10 01:23 utsname
[root@RHEL54-INTEL64-GUIDE-APDB2-AP containers]#
------------


How about changing Makefile as follows?

============
--- ./testcases/kernel/containers/Makefile      2010-03-10
01:23:25.000000000 +0900
+++ ./testcases/kernel/containers/Makefile.new  2010-03-10
15:27:20.000000000 +0900
@@ -28,6 +28,8 @@

 LIB                    := -ld

+CFLAGS                  += -ldl
+
 INSTALL_TARGETS                := *.sh

 $(LIBDIR):
============


Regards--


-Tomonori Mitani



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