configure.ac: add libutil to the dependency list

Jimtcl 0.80 (2020-10-29) adds dependency to libutil, which is part
of the GNU libc.
The library is searched and used by jimtcl build, but still has to
be linked in by OpenOCD as indirect dependency.

While OpenOCD is still using jimtcl 0.79, let's prepare to switch
to the next version.
Add libutil search in configure.ac.

Change-Id: I5a8952161b0e5b93fc00d23be256b5274d31e08c
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/5922
Tested-by: jenkins
Reviewed-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>

diff --git a/configure.ac b/configure.ac
index 055833a7fb5aa30d1f5d890aff1bcf065685a1f8..3e49213cc4eec0d677e37ab8c2b99c17e865d70c 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -44,6 +44,7 @@ AC_TYPE_LONG_LONG_INT
 
 AC_SEARCH_LIBS([ioperm], [ioperm])
 AC_SEARCH_LIBS([dlopen], [dl])
+AC_SEARCH_LIBS([openpty], [util])
 
 AC_CHECK_HEADERS([sys/socket.h])
 AC_CHECK_HEADERS([elf.h])