Making sure the compiler also links against libz, which is used by libmagic.

This fixes Savannah bug #38378, reported by Alan Hourihane.


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4967 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

+2014-06-16  Benno Schulenberg  <bensberg@justemail.net>
+	* configure.ac: For the sake of statically linked systems, make sure
+	the compiler also links against libz, which is used by libmagic.
+	This fixes Savannah bug #38378, reported by Alan Hourihane.
+
 2014-06-14  Mark Majeres  <mark@engine12.com>
 	* src/nano.h, src/text.c (undo_cut, update_undo): When undoing a
 	backwards cut, put the cursor back in front of it, where it was.

configure.ac

@@ -649,6 +649,8 @@ AC_MSG_WARN([*** Can't check for macro redefinability when cross-compiling]))
 AS_IF([test "x$enable_libmagic" != "xno"], [
   AC_CHECK_HEADERS_ONCE([magic.h])
   AC_CHECK_LIB(magic, magic_open)
+  AC_CHECK_HEADERS_ONCE([zlib.h])
+  AC_CHECK_LIB(z, inflate)
 ])
 
 # Check for groff html support.