-AC_CHECK_HEADER([curl/curl.h],,AC_MSG_ERROR([unable to find libcurl header files]))
-AC_CHECK_LIB([curl],[curl_global_init],,AC_MSG_ERROR([unable to link with libcurl]))
-AC_MSG_CHECKING([for CURLOPT_SSL_CTX_FUNCTION in curl.h])
-AC_EGREP_HEADER([CURLOPT_SSL_CTX_FUNCTION], [curl/curl.h],
- [AC_MSG_RESULT(yes)],
- [AC_MSG_ERROR([need libcurl that supports CURLOPT_SSL_CTX_FUNCTION])])
+
+# zlib settings
+AC_ARG_WITH(zlib,
+ AC_HELP_STRING([--with-zlib=PATH], [where zlib is installed]),
+ [
+ if test -d "$withval"; then
+ CPPFLAGS="${CPPFLAGS} -I$withval/include"
+ LDFLAGS="${LDFLAGS} -L$withval/lib"
+ fi
+ ]
+)
+AC_CHECK_HEADER([zlib.h],,AC_MSG_ERROR([unable to find zlib header files]))
+AC_CHECK_LIB([z],[deflateInit2_],,AC_MSG_ERROR([unable to link with zlib library]))
+
+# OpenSSL settings
+AC_ARG_WITH(openssl,
+ AC_HELP_STRING([--with-openssl=PATH], [where openssl is installed]),
+ [if test x_$with_openssl != x_/usr; then
+ SSLFLAGS="-I${with_openssl}/include"
+ fi])
+
+if test "x$SSLFLAGS" = "x" ; then
+ AC_PATH_PROG(PKG_CONFIG, pkg-config)
+ if test "x$PKG_CONFIG" != x && test "x$PKG_CONFIG" != "xno" ; then
+ if pkg-config openssl ; then
+ SSLFLAGS="`$PKG_CONFIG --cflags openssl`"
+ else
+ AC_MSG_ERROR([OpenSSL not supported by pkg-config, try --with-openssl instead])
+ fi
+ fi
+fi
+
+AC_MSG_CHECKING(for OpenSSL cflags)
+AC_MSG_RESULT($SSLFLAGS)
+CPPFLAGS="$SSLFLAGS $CPPFLAGS"
+
+AC_CHECK_HEADER([openssl/x509.h],,
+ AC_MSG_ERROR([unable to find openssl header files]))