Commit Brian Olson's gzip stream implementations.
diff --git a/configure.ac b/configure.ac
index 6015281..2824960 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,6 +15,11 @@
AC_CONFIG_MACRO_DIR([m4])
AM_INIT_AUTOMAKE
+AC_ARG_WITH([zlib],
+ [AS_HELP_STRING([--with-zlib],
+ [include classes for streaming compressed data in and out @<:@default=check@:>@])],
+ [],[with_zlib=check])
+
# Checks for programs.
AC_PROG_CC
AC_PROG_CXX
@@ -38,6 +43,16 @@
AC_FUNC_STRTOD
AC_CHECK_FUNCS([ftruncate memset mkdir strchr strerror strtol])
+HAVE_ZLIB=0
+AS_IF([test "$with_zlib" != no],
+ [AC_SEARCH_LIBS([zlibVersion], [z],
+ [AC_DEFINE([HAVE_ZLIB], [1], [Enable classes using zlib compression.])
+ HAVE_ZLIB=1],
+ [if test "$with_zlib" != check; then
+ AC_MSG_FAILURE([--with-zlib was given, but test for zlib failed])
+ fi])])
+AM_CONDITIONAL([HAVE_ZLIB], [test $HAVE_ZLIB = 1])
+
ACX_PTHREAD
AC_CXX_STL_HASH