Migrate ext/zlib to use pkg-config

There are other extensions checking for zlib as well, not quite
sure what to do there with regard to option names.

Author: nikic

ext/curl/config.m4

@@ -7,10 +7,8 @@ if test "$PHP_CURL" != "no"; then
   PKG_CHECK_MODULES([CURL], [libcurl >= 7.15.5])
   PKG_CHECK_VAR([CURL_FEATURES], [libcurl], [supported_features])
 
-  dnl common stuff (pkg-config / curl-config)
-
   PHP_EVAL_LIBLINE($CURL_LIBS, CURL_SHARED_LIBADD)
-  PHP_EVAL_INCLINE($CURL_CFLAGS, CURL_SHARED_LIBADD)
+  PHP_EVAL_INCLINE($CURL_CFLAGS)
 
   AC_MSG_CHECKING([for SSL support in libcurl])
   case "$CURL_FEATURES" in

ext/zlib/config0.m4

@@ -1,63 +1,16 @@
 dnl config.m4 for extension zlib
 
 PHP_ARG_WITH(zlib,for ZLIB support,
-[  --with-zlib[=DIR]         Include ZLIB support (requires zlib >= 1.2.0.4)])
+[  --with-zlib               Include ZLIB support (requires zlib >= 1.2.0.4)])
 
-PHP_ARG_WITH(zlib-dir,if the location of ZLIB install directory is defined,
-[  --with-zlib-dir=<DIR>   Define the location of zlib install directory], no, no)
+if test "$PHP_ZLIB" != "no"; then
+  PKG_CHECK_MODULES([ZLIB], [zlib >= 1.2.0.4])
 
-if test "$PHP_ZLIB" != "no" || test "$PHP_ZLIB_DIR" != "no"; then
-  PHP_NEW_EXTENSION(zlib, zlib.c zlib_fopen_wrapper.c zlib_filter.c, $ext_shared,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
-  PHP_SUBST(ZLIB_SHARED_LIBADD)
-
-  if test "$PHP_ZLIB" != "yes" -a "$PHP_ZLIB" != "no"; then
-    if test -f $PHP_ZLIB/include/zlib/zlib.h; then
-      ZLIB_DIR=$PHP_ZLIB
-      ZLIB_INCDIR=$ZLIB_DIR/include/zlib
-    elif test -f $PHP_ZLIB/include/zlib.h; then
-      ZLIB_DIR=$PHP_ZLIB
-      ZLIB_INCDIR=$ZLIB_DIR/include
-    fi
-  else
-    for i in /usr/local /usr $PHP_ZLIB_DIR; do
-      if test -f $i/include/zlib/zlib.h; then
-        ZLIB_DIR=$i
-        ZLIB_INCDIR=$i/include/zlib
-      elif test -f $i/include/zlib.h; then
-        ZLIB_DIR=$i
-        ZLIB_INCDIR=$i/include
-      fi
-    done
-  fi
-
-  if test -z "$ZLIB_DIR"; then
-    AC_MSG_ERROR(Cannot find zlib)
-  fi
-
-  case $ZLIB_DIR in
-  /usr) ac_extra= ;;
-  *) ac_extra=-L$ZLIB_DIR/$PHP_LIBDIR ;;
-  esac
+  PHP_EVAL_LIBLINE($ZLIB_LIBS, ZLIB_SHARED_LIBADD)
+  PHP_EVAL_INCLINE($ZLIB_CFLAGS)
 
-  AC_MSG_CHECKING([for zlib version >= 1.2.0.4])
-  ZLIB_VERSION=`$EGREP "define ZLIB_VERSION" $ZLIB_INCDIR/zlib.h | $SED -e 's/[[^0-9\.]]//g'`
-  AC_MSG_RESULT([$ZLIB_VERSION])
-  if test `echo $ZLIB_VERSION | $SED -e 's/[[^0-9]]/ /g' | $AWK '{print $1*1000000 + $2*10000 + $3*100 + $4}'` -lt 1020004; then
-    AC_MSG_ERROR([zlib version greater or equal to 1.2.0.4 required])
-  fi
-
-  PHP_CHECK_LIBRARY(z, gzgets, [
-    AC_DEFINE(HAVE_ZLIB,1,[ ])
-  ],[
-    AC_MSG_ERROR(ZLIB extension requires gzgets in zlib)
-  ],[
-    $ac_extra
-  ])
-
-  PHP_ADD_LIBPATH($ZLIB_DIR/$PHP_LIBDIR, ZLIB_SHARED_LIBADD)
-
-  PHP_ZLIB_DIR=$ZLIB_DIR
-  PHP_ADD_LIBRARY(z,, ZLIB_SHARED_LIBADD)
-  PHP_ADD_INCLUDE($ZLIB_INCDIR)
+  AC_DEFINE(HAVE_ZLIB,1,[ ])
 
+  PHP_NEW_EXTENSION(zlib, zlib.c zlib_fopen_wrapper.c zlib_filter.c, $ext_shared,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
+  PHP_SUBST(ZLIB_SHARED_LIBADD)
 fi