File unshield-zlib_test.patch of Package unshield

--- Makefile.am
+++ Makefile.am
@@ -2,6 +2,7 @@
 @SET_MAKE@
 
 ## don't complain about missing AUTHORS, NEWS, ChangeLog, etc
+ACLOCAL_AMFLAGS = -I m4
 AUTOMAKE_OPTIONS = foreign 1.4
 
 m4datadir = $(datadir)/aclocal
--- m4/check_zlib.m4
+++ m4/check_zlib.m4
@@ -31,13 +31,13 @@
 [  --with-zlib=DIR root directory path of zlib installation [defaults to
                     /usr/local or /usr if not found in /usr/local]
   --without-zlib to disable zlib usage completely],
-[if test "$withval" != no ; then
-  AC_MSG_RESULT(yes)
+[if test "$withval" != "no" ; then
+  AC_MSG_RESULT([yes])
   ZLIB_HOME="$withval"
 else
-  AC_MSG_RESULT(no)
+  AC_MSG_RESULT([no])
 fi], [
-AC_MSG_RESULT(yes)
+AC_MSG_RESULT([yes])
 ZLIB_HOME=/usr/local
 if test ! -f "${ZLIB_HOME}/include/zlib.h"
 then
@@ -50,8 +50,8 @@
 #
 if test -n "${ZLIB_HOME}"
 then
-        ZLIB_OLD_LDFLAGS=$LDFLAGS
-        ZLIB_OLD_CPPFLAGS=$LDFLAGS
+        ZLIB_OLD_LDFLAGS="$LDFLAGS"
+        ZLIB_OLD_CPPFLAGS="$LDFLAGS"
         LDFLAGS="$LDFLAGS -L${ZLIB_HOME}/lib"
         CPPFLAGS="$CPPFLAGS -I${ZLIB_HOME}/include"
         AC_LANG_SAVE
@@ -65,17 +65,17 @@
                 # If both library and header were found, use them
                 #
                 AC_CHECK_LIB(z, inflateEnd)
-                AC_MSG_CHECKING(zlib in ${ZLIB_HOME})
-                AC_MSG_RESULT(ok)
+                AC_MSG_CHECKING([zlib in ${ZLIB_HOME}])
+                AC_MSG_RESULT([ok])
         else
                 #
                 # If either header or library was not found, revert and bomb
                 #
-                AC_MSG_CHECKING(zlib in ${ZLIB_HOME})
+                AC_MSG_CHECKING([zlib in ${ZLIB_HOME}])
                 LDFLAGS="$ZLIB_OLD_LDFLAGS"
                 CPPFLAGS="$ZLIB_OLD_CPPFLAGS"
-                AC_MSG_RESULT(failed)
-                AC_MSG_ERROR(either specify a valid zlib installation with --with-zlib=DIR or disable zlib usage with --without-zlib)
+                AC_MSG_RESULT([failed])
+                AC_MSG_ERROR([either specify a valid zlib installation with --with-zlib=DIR or disable zlib usage with --without-zlib])
         fi
 fi