xfstests: fix dbtest build

At least on my x86_64 RHEL5 box, if gdbm-devel is installed, then the xfstests build fails with:

gcc dbtest.c -o dbtest -g -O2 -DDEBUG -I../include -DVERSION=\"1.0.0\" -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -funsigned-char -fno-strict-aliasing -Wall ../lib/.libs/libtest.a dbtest.c: In function 'InitDbmLookup':
dbtest.c:147: warning: cast from pointer to integer of different size
dbtest.c:198: warning: cast from pointer to integer of different size
/tmp/ccuekqxe.o: In function `CleanupDbmLookup':
/root/cvs/xfs-cmds-build/xfstests/src/dbtest.c:304: undefined reference to `dbm_close'
/tmp/ccuekqxe.o: In function `DoDbmLookup':
/root/cvs/xfs-cmds-build/xfstests/src/dbtest.c:220: undefined reference to `dbm_fetch'
/root/cvs/xfs-cmds-build/xfstests/src/dbtest.c:264: undefined reference to `dbm_fetch'
/tmp/ccuekqxe.o: In function `InitDbmLookup':
/root/cvs/xfs-cmds-build/xfstests/src/dbtest.c:146: undefined reference to `dbm_open'
/root/cvs/xfs-cmds-build/xfstests/src/dbtest.c:179: undefined reference to `dbm_store'
/root/cvs/xfs-cmds-build/xfstests/src/dbtest.c:192: undefined reference to `dbm_close'
/root/cvs/xfs-cmds-build/xfstests/src/dbtest.c:197: undefined reference to `dbm_open'
collect2: ld returned 1 exit status
gmake[1]: *** [dbtest] Error 1
make: *** [default] Error 2

This patch fixes it for me, but my userspace-fu is weak; does this look ok?

Thanks,
-Eric

Index: xfs-cmds-build/xfstests/aclocal.m4
===================================================================
@@ -197,8 +197,8 @@ AC_DEFUN([AC_PACKAGE_WANT_NDBM],
 
 AC_DEFUN([AC_PACKAGE_WANT_GDBM],
   [ AC_CHECK_HEADERS([gdbm/ndbm.h], [ have_db=true ], [ have_db=false ])
-    if test $have_db = true -a -f ${libexecdir}${libdirsuffix}/libgdbm.a; then
-	libgdbm="${libexecdir}${libdirsuffix}/libgdbm.a"
+    if test $have_db = true; then
+	libgdbm="-lgdbm"
     fi
     AC_SUBST(libgdbm)
     AC_SUBST(have_db)

Still doesn't build even with libgdbm-dev installed on debian, despite having a /usr/include/gdbm.h. Even when manually including that one it doesn't define DBM. Which of the three headers does actually get used on RHEL?

hm, looks like:

checking gdbm/ndbm.h usability... yes
checking gdbm/ndbm.h presence... yes
checking for gdbm/ndbm.h... yes

and include/config.h winds up as:

/* Define to 1 if you have the <gdbm/ndbm.h> header file. */ #define HAVE_GDBM_NDBM_H 1

...

/* Define to 1 if you have the <ndbm.h> header file. */ /* #undef HAVE_NDBM_H */

and:

[root@host xfstests]# locate gdbm/ndbm.h /usr/include/gdbm/ndbm.h
[root@host xfstests]# rpm -qf /usr/include/gdbm/ndbm.h gdbm-devel-1.8.0-26.2.1
[root@bear-05 xfstests]#

-Eric