1 files changed, 74 insertions, 0 deletions
diff --git a/build/ac-macros/zlib.m4 b/build/ac-macros/zlib.m4
new file mode 100644
index 0000000..298dfee
--- /dev/null
+++ b/build/ac-macros/zlib.m4
@@ -0,0 +1,74 @@
+dnl ===================================================================
+dnl   Licensed to the Apache Software Foundation (ASF) under one
+dnl   or more contributor license agreements.  See the NOTICE file
+dnl   distributed with this work for additional information
+dnl   regarding copyright ownership.  The ASF licenses this file
+dnl   to you under the Apache License, Version 2.0 (the
+dnl   "License"); you may not use this file except in compliance
+dnl   with the License.  You may obtain a copy of the License at
+dnl
+dnl     http://www.apache.org/licenses/LICENSE-2.0
+dnl
+dnl   Unless required by applicable law or agreed to in writing,
+dnl   software distributed under the License is distributed on an
+dnl   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+dnl   KIND, either express or implied.  See the License for the
+dnl   specific language governing permissions and limitations
+dnl   under the License.
+dnl ===================================================================
+dnl
+dnl  SVN_LIB_Z
+dnl
+dnl  Check configure options and assign variables related to
+dnl  the zlib library.
+dnl
+
+AC_DEFUN(SVN_LIB_Z,
+[
+  zlib_found=no
+
+  AC_ARG_WITH(zlib,AS_HELP_STRING([--with-zlib=PREFIX],
+                                  [zlib compression library]),
+  [
+    if test "$withval" = "yes" ; then
+      AC_CHECK_HEADER(zlib.h, [
+        AC_CHECK_LIB(z, inflate, [zlib_found="builtin"])
+      ])
+    elif test "$withval" = "no" ; then
+      AC_MSG_ERROR([cannot compile without zlib.])
+    else
+      AC_MSG_NOTICE([zlib library configuration])
+      zlib_prefix=$withval
+      save_cppflags="$CPPFLAGS"
+      CPPFLAGS="$CPPFLAGS -I$zlib_prefix/include"
+      AC_CHECK_HEADERS(zlib.h,[
+        save_ldflags="$LDFLAGS"
+        LDFLAGS="$LDFLAGS -L$zlib_prefix/lib"
+        AC_CHECK_LIB(z, inflate, [zlib_found="yes"])
+        LDFLAGS="$save_ldflags"
+      ])
+      CPPFLAGS="$save_cppflags"
+    fi
+  ],
+  [
+    AC_CHECK_HEADER(zlib.h, [
+      AC_CHECK_LIB(z, inflate, [zlib_found="builtin"])
+    ])
+  ])
+
+  if test "$zlib_found" = "no"; then
+    AC_MSG_ERROR([subversion requires zlib])
+  fi
+
+  if test "$zlib_found" = "yes"; then
+    SVN_ZLIB_PREFIX="$zlib_prefix"
+    SVN_ZLIB_INCLUDES="-I$zlib_prefix/include"
+    LDFLAGS="$LDFLAGS `SVN_REMOVE_STANDARD_LIB_DIRS(-L$zlib_prefix/lib)`"
+  fi
+
+  SVN_ZLIB_LIBS="-lz"
+
+  AC_SUBST(SVN_ZLIB_PREFIX)
+  AC_SUBST(SVN_ZLIB_INCLUDES)
+  AC_SUBST(SVN_ZLIB_LIBS)
+])