[or-cvs] Give a better error message when zlib.h is not found.

[nickm@xxxxxxxx (Nick Mathewson)]

Update of /home/or/cvsroot/tor
In directory moria.mit.edu:/tmp/cvs-serv787

Modified Files:
	configure.in 
Log Message:
Give a better error message when zlib.h is not found.

Index: configure.in
===================================================================
RCS file: /home/or/cvsroot/tor/configure.in,v
retrieving revision 1.165
retrieving revision 1.166
diff -u -d -r1.165 -r1.166
--- configure.in	3 Feb 2005 21:31:04 -0000	1.165
+++ configure.in	12 Feb 2005 21:06:06 -0000	1.166
@@ -141,10 +141,12 @@
 
 dnl The warning message here is no longer strictly accurate.
 
-AC_CHECK_HEADERS(unistd.h string.h signal.h netdb.h ctype.h sys/stat.h sys/types.h fcntl.h sys/fcntl.h sys/ioctl.h sys/socket.h sys/time.h netinet/in.h arpa/inet.h errno.h assert.h time.h pwd.h grp.h zlib.h, , AC_MSG_WARN(some headers were not found, compilation may fail))
+AC_CHECK_HEADERS(unistd.h string.h signal.h netdb.h ctype.h sys/stat.h sys/types.h fcntl.h sys/fcntl.h sys/ioctl.h sys/socket.h sys/time.h netinet/in.h arpa/inet.h errno.h assert.h time.h pwd.h grp.h, , AC_MSG_WARN(some headers were not found, compilation may fail))
 
 AC_CHECK_HEADERS(event.h, , AC_MSG_ERROR(Libevent header (event.h) not found. Tor requires libevent to build.))
 
+AC_CHECK_HEADERS(zlib.h, , AC_MSG_ERROR(Zlib header (zlib.h) not found. Tor requires zlib to build. You may need to install a zlib development package.))
+
 dnl These headers are not essential
 
 AC_CHECK_HEADERS(stdint.h sys/types.h inttypes.h sys/param.h sys/wait.h sys/limits.h netinet/in.h arpa/inet.h machine/limits.h syslog.h sys/time.h sys/resource.h pthread.h)