attempt to locate zlib even if --with-zlib is disabled, so we can add library support in phar

ext/phar/config.m4

@@ -1,9 +1,49 @@
 dnl $Id$
 dnl config.m4 for extension phar
 
-PHP_ARG_ENABLE(phar, whether to enable phar support,
-[  --enable-phar           Enable phar support])
+PHP_ARG_WITH(phar, enable phar support (only specify ZLIB_DIR for --with-zlib=no),
+[  --with-phar[=ZLIB_DIR]  Enable phar support])
 
 if test "$PHP_PHAR" != "no"; then
   PHP_NEW_EXTENSION(phar, phar.c, $ext_shared)
+
+  dnl use zlib extension data if specified, otherwise try to find our own zlib
+  if test "$PHP_ZLIB" = "no" -a "$PHP_ZLIB_DIR" = "no"
+    PHP_SUBST(PHAR_SHARED_LIBADD)
+    for i in /usr/local /usr $PHP_PHAR; do
+      if test -f $i/include/zlib/zlib.h; then
+        PHAR_ZLIB_DIR=$i
+        PHAR_ZLIB_INCDIR=$i/include/zlib
+      elif test -f $i/include/zlib.h; then
+        PHAR_ZLIB_DIR=$i
+        PHAR_ZLIB_INCDIR=$i/include
+      fi
+    done
+
+    if test -z "$PHAR_ZLIB_DIR"; then
+      AC_MSG_WARN(Cannot find libz, zlib support disabled for phar extension)
+    elif
+      PHP_CHECK_LIBRARY(z, gzgets, [
+        AC_DEFINE(HAVE_PHAR_ZLIB,1,[ ]) 
+        PHP_ADD_LIBPATH($PHAR_ZLIB_DIR/$PHAR_ZLIB_DIR, PHAR_SHARED_LIBADD)
+
+        PHP_ZLIB_DIR=$PHAR_ZLIB_DIR
+        PHP_ADD_LIBRARY(z,, PHAR_SHARED_LIBADD)
+        PHP_ADD_INCLUDE($PHAR_ZLIB_INCDIR)
+      ],[
+        AC_MSG_WARN(PHAR extension requires zlib >= 1.0.9, zlib support disabled for phar extension)
+      ],[
+        case $PHAR_ZLIB_DIR in
+        /usr) ac_extra= ;; 
+        *) ac_extra=-L$PHAR_ZLIB_DIR/$PHP_LIBDIR ;;
+        esac
+        $ac_extra
+        PHP_ADD_LIBPATH($PHAR_ZLIB_DIR/$PHP_LIBDIR, PHAR_SHARED_LIBADD)
+
+        PHP_ZLIB_DIR=$PHAR_ZLIB_DIR
+        PHP_ADD_LIBRARY(z,, PHAR_SHARED_LIBADD)
+        PHP_ADD_INCLUDE($PHAR_ZLIB_INCDIR)
+      ])
+    fi
+  fi
 fi