Support external liburiparse and boost
https://code.google.com/p/libkml/issues/detail?id=50
--- configure.ac.orig
+++ configure.ac
@@ -20,6 +20,8 @@ AC_FUNC_STRTOD
 AC_HEADER_STDBOOL
 AC_TYPE_SIZE_T
 
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])dnl backward compat
+
 dnl Let Makefile know if we are GCC.
 AM_CONDITIONAL(GCC, test "$GCC" = yes)
 
@@ -68,6 +70,49 @@ AC_ARG_WITH(python-lib-dir,
 	    [PYTHON_LIB_DIR=$withval],)
 AC_SUBST(PYTHON_LIB_DIR)
 
+dnl use libs from system or our third_party?
+dnl CPPFLAGS_saved="$CPPFLAGS"
+internal_boost_version="_1_34_1"
+AC_LANG_PUSH(C++)
+AC_ARG_WITH([boost],
+	    AC_HELP_STRING([--with-boost=DIR], [look in DIR for boost]),
+	    [BOOST_INCS=$withval/include
+	     test -d ${BOOST_INCS} \
+		&& AS_VAR_APPEND([CPPFLAGS],[" -I$BOOST_INCS"])
+	     AC_CHECK_HEADERS([boost/shared_ptr.hpp],,
+	       [AC_MSG_ERROR([Required $ac_header not found])])
+	    ],
+	    [AC_CHECK_HEADERS([boost/shared_ptr.hpp],,
+	       [AC_MSG_WARN([Using third_party/boost$internal_boost_version])
+                BOOST_INCS="\$(top_srcdir)/third_party/boost$internal_boost_version"
+dnl		AS_VAR_APPEND([CPPFLAGS],[" -I\$(top_srcdir)/$BOOST_INCS"])
+	       ])
+	    ])
+AC_LANG_POP
+dnl CPPFLAGS="$CPPFLAGS_saved"
+AC_SUBST(BOOST_INCS)
+AM_CONDITIONAL([INTERNAL_BOOST], [test "x$BOOST_INCS" = "xthird_party/boost$internal_boost_version"])
+
+dnl FIXME: Allow for using distro's zlib
+AM_CONDITIONAL([INTERNAL_ZLIB], [true])
+
+internal_uriparser_version="-0.7.5"
+CPPFLAGS_saved="$CPPFLAGS"
+AC_ARG_WITH([liburiparser],
+	    AC_HELP_STRING([--with-liburiparser=DIR], [look in DIR for liburiparser]),
+	    [LIBURIPARSER_DIR=$withval
+	     test -d ${LIBURIPARSER_DIR}/include \
+		&& AS_VAR_APPEND([CPPFLAGS],[" -I$LIBURIPARSER_DIR/include"])
+	     AC_CHECK_HEADERS([uriparser/Uri.h],,
+	       [AC_MSG_ERROR([Required $ac_header not found])])
+	    ],
+	    [AC_CHECK_HEADERS([uriparser/Uri.h],,
+	       [AC_MSG_WARN([Using third_party/uriparser$internal_uriparser_version])
+                LIBURIPARSER_DIR="third_party/uriparser$internal_uriparser_version"
+	       ])
+	    ])
+AC_SUBST(LIBURIPARSER_DIR)
+AM_CONDITIONAL([INTERNAL_LIBURIPARSER], [test "x$LIBURIPARSER_DIR" = "xthird_party/uriparser$internal_uriparser_version"])
 
 AC_CHECK_HEADERS(expat.h, [expat_h_found="yes"], [expat_h_found="no"])
 if test $expat_h_found = "no"
@@ -78,7 +123,10 @@ AC_CHECK_LIB(expat, XML_ParserCreate, [],
 	AC_MSG_ERROR("Expat library not found. Use configure --help to see how to specify the search path"))
 
 AC_CHECK_HEADERS([float.h limits.h stdlib.h string.h])
-AC_CHECK_FUNCS([floor memset strstr])
+dnl saved_LIBS=$LIBS
+dnl AC_SEARCH_LIBS([floor], [m])
+AC_CHECK_LIB([m], [floor])
+AC_CHECK_FUNCS([memset strstr])
 
 dnl If SWIG is available we will try to generate bindings.
 AC_ARG_ENABLE(swig,
--- examples/engine/Makefile.am.orig
+++ examples/engine/Makefile.am
@@ -1,5 +1,5 @@
 AM_CPPFLAGS = -I$(top_srcdir)/src \
-	      -I$(top_srcdir)/third_party/boost_1_34_1
+	      -I@BOOST_INCS@
 
 if GCC
 AM_CXXFLAGS = -Wall -Werror -ansi -pedantic -fno-rtti
--- examples/gpx/Makefile.am.orig
+++ examples/gpx/Makefile.am
@@ -1,5 +1,5 @@
 AM_CPPFLAGS = -I$(top_srcdir)/src \
-	      -I$(top_srcdir)/third_party/boost_1_34_1
+	      -I@BOOST_INCS@
 
 if GCC
 AM_CXXFLAGS = -Wall -Werror -ansi -pedantic -fno-rtti
--- examples/gx/Makefile.am.orig
+++ examples/gx/Makefile.am
@@ -1,5 +1,5 @@
 AM_CPPFLAGS = -I$(top_srcdir)/src \
-	      -I$(top_srcdir)/third_party/boost_1_34_1
+	      -I@BOOST_INCS@
 
 if GCC
 AM_CXXFLAGS = -Wall -Werror -ansi -pedantic -fno-rtti
--- examples/hellonet/Makefile.am.orig
+++ examples/hellonet/Makefile.am
@@ -1,7 +1,7 @@
 if HAVE_CURL
 AM_CPPFLAGS = -I$(top_srcdir)/src \
 	      -I$(top_srcdir)/examples/hellonet \
-	      -I$(top_srcdir)/third_party/boost_1_34_1
+	      -I@BOOST_INCS@
 
 if GCC
 AM_CXXFLAGS = -Wall -Werror -ansi -pedantic -fno-rtti
--- examples/helloworld/Makefile.am.orig
+++ examples/helloworld/Makefile.am
@@ -1,6 +1,6 @@
 AM_CPPFLAGS = -I$(top_srcdir)/src \
 	      -I$(top_srcdir)/examples/helloworld \
-	      -I$(top_srcdir)/third_party/boost_1_34_1
+	      -I@BOOST_INCS@
 
 
 if GCC
--- examples/regionator/Makefile.am.orig
+++ examples/regionator/Makefile.am
@@ -1,5 +1,5 @@
 AM_CPPFLAGS = -I$(top_srcdir)/src \
-              -I$(top_srcdir)/third_party/boost_1_34_1 \
+	      -I@BOOST_INCS@ \
               -I$(top_srcdir)/third_party/zlib-1.2.3/contrib
 
 if GCC
--- examples/xsd/Makefile.am.orig
+++ examples/xsd/Makefile.am
@@ -1,6 +1,6 @@
 AM_CPPFLAGS = -I$(top_srcdir)/src \
 	      -I$(top_srcdir)/examples/xsd \
-	      -I$(top_srcdir)/third_party/boost_1_34_1
+	      -I@BOOST_INCS@
 
 if GCC
 AM_CXXFLAGS = -Wall -Werror -ansi -pedantic -fno-rtti
--- src/kml/base/Makefile.am.orig
+++ src/kml/base/Makefile.am
@@ -1,8 +1,6 @@
 AM_CPPFLAGS = -I$(top_srcdir)/src \
-              -I$(top_srcdir)/third_party/boost_1_34_1 \
-              -I$(top_srcdir)/third_party/googletest-r108/include \
-              -I$(top_srcdir)/third_party/uriparser-0.7.5/include \
-              -I$(top_srcdir)/third_party/zlib-1.2.3/contrib
+	      -I@BOOST_INCS@ \
+	      -I$(top_srcdir)/third_party/googletest-r108/include
 
 if GCC
 AM_CXXFLAGS = -Wall -Wextra -Wno-unused-parameter -Werror -ansi -pedantic -fno-rtti
@@ -30,9 +28,19 @@ libkmlbase_la_SOURCES = \
 	xml_namespaces.cc \
 	zip_file.cc
 
-libkmlbase_la_LIBADD = \
-	$(top_builddir)/third_party/libminizip.la \
-	$(top_builddir)/third_party/liburiparser.la
+libkmlbase_la_LIBADD =
+if INTERNAL_ZLIB
+libkmlbase_la_LIBADD += \
+	$(top_builddir)/third_party/libminizip.la
+AM_CPPFLAGS += -I$(top_srcdir)/third_party/zlib-1.2.3/contrib
+endif
+if INTERNAL_LIBURIPARSER
+AM_CPPFLAGS += -I$(top_srcdir)/@LIBURIPARSER_DIR@/include
+liburiparser_la_file = $(top_builddir)/third_party/liburiparser.la
+else
+liburiparser_la_file = $(LIBURIPARSER_DIR)/lib/liburiparser.la
+endif
+libkmlbase_la_LIBADD += $(liburiparser_la_file)
 
 # These header files will be installed in $(includedir)/kml/base
 libkmlbaseincludedir = $(includedir)/kml/base
@@ -138,7 +146,6 @@ math_util_test_LDADD = libkmlbase.la \
 net_cache_test_SOURCES = net_cache_test.cc
 net_cache_test_CXXFLAGS = -DDATADIR=\"$(DATA_DIR)\" $(AM_TEST_CXXFLAGS)
 net_cache_test_LDADD = libkmlbase.la \
-        $(top_builddir)/third_party/liburiparser.la \
 	$(top_builddir)/third_party/libgtest.la
 
 referent_test_SOURCES = referent_test.cc
@@ -164,7 +171,6 @@ time_util_test_LDADD= libkmlbase.la \
 uri_parser_test_SOURCES = uri_parser_test.cc
 uri_parser_test_CXXFLAGS = -DDATADIR=\"$(DATA_DIR)\" $(AM_TEST_CXXFLAGS)
 uri_parser_test_LDADD= libkmlbase.la \
-        $(top_builddir)/third_party/liburiparser.la \
 	$(top_builddir)/third_party/libgtest.la
 
 util_test_SOURCES = util_test.cc
--- src/kml/base/file_posix.cc.orig
+++ src/kml/base/file_posix.cc
@@ -25,8 +25,10 @@
 
 // The file contains the implementation of the File methods specific to
 // POSIX platforms.
+// err.. Ever heard about boost::filesystem?
 
 #include "kml/base/file.h"
+#include <unistd.h> /* unlink() */
 #include <stdlib.h>
 #include <string.h>
 #include <sys/types.h>
--- src/kml/convenience/Makefile.am.orig
+++ src/kml/convenience/Makefile.am
@@ -1,5 +1,5 @@
 AM_CPPFLAGS = -I$(top_srcdir)/src \
-	      -I$(top_srcdir)/third_party/boost_1_34_1 \
+	      -I@BOOST_INCS@ \
               -I$(top_srcdir)/third_party/googletest-r108/include
 
 if GCC
--- src/kml/dom/Makefile.am.orig
+++ src/kml/dom/Makefile.am
@@ -1,5 +1,5 @@
 AM_CPPFLAGS= -I$(top_srcdir)/src \
-	     -I$(top_srcdir)/third_party/boost_1_34_1 \
+	     -I@BOOST_INCS@ \
 	     -I$(top_srcdir)/third_party/googletest-r108/include
 
 if GCC
--- src/kml/engine/Makefile.am.orig
+++ src/kml/engine/Makefile.am
@@ -1,5 +1,5 @@
 AM_CPPFLAGS= -I$(top_srcdir)/src \
-	     -I$(top_srcdir)/third_party/boost_1_34_1 \
+	     -I@BOOST_INCS@ \
 	     -I$(top_srcdir)/third_party/googletest-r108/include
 
 if GCC
--- src/kml/regionator/Makefile.am.orig
+++ src/kml/regionator/Makefile.am
@@ -1,5 +1,5 @@
 AM_CPPFLAGS= -I$(top_srcdir)/src \
-             -I$(top_srcdir)/third_party/boost_1_34_1 \
+	     -I@BOOST_INCS@ \
 	     -I$(top_srcdir)/third_party/googletest-r108/include
 
 
--- src/kml/xsd/Makefile.am.orig
+++ src/kml/xsd/Makefile.am
@@ -1,5 +1,5 @@
 AM_CPPFLAGS = -I$(top_srcdir)/src \
-              -I$(top_srcdir)/third_party/boost_1_34_1 \
+	      -I@BOOST_INCS@ \
 	      -I$(top_srcdir)/third_party/googletest-r108/include
 
 if GCC
--- src/swig/Makefile.am.orig
+++ src/swig/Makefile.am
@@ -1,7 +1,7 @@
 SUBDIRS = java python
 
 AM_CPPFLAGS = -I$(top_srcdir)/src \
-	      -I$(top_srcdir)/third_party/boost_1_34_1 \
+	      -I@BOOST_INCS@ \
 	      -I$(top_srcdir)/third_party/uriparser-0.7.5/include
 
 COMMONLIBS = $(top_builddir)/src/kml/engine/libkmlengine.la \
--- third_party/Makefile.am.orig
+++ third_party/Makefile.am
@@ -1,19 +1,26 @@
 uriparser = uriparser-0.7.5
 
-AM_CPPFLAGS = -I$(top_srcdir)/third_party/zlib-1.2.3/contrib \
-	      -I$(top_srcdir)/third_party/$(uriparser)/include \
-	      -I$(top_srcdir)/third_party/googletest-r108 \
-	      -I$(top_srcdir)/third_party/googletest-r108/include
+AM_CPPFLAGS =
 
-lib_LTLIBRARIES = libminizip.la liburiparser.la
+lib_LTLIBRARIES =
 noinst_LTLIBRARIES = libgtest.la
 
+if INTERNAL_ZLIB
+AM_CPPFLAGS += -I$(top_srcdir)/third_party/zlib-1.2.3/contrib
+lib_LTLIBRARIES += libminizip.la
+
 libminizip_la_SOURCES = \
 	zlib-1.2.3/contrib/minizip/unzip.c \
 	zlib-1.2.3/contrib/minizip/ioapi.c \
 	zlib-1.2.3/contrib/minizip/iomem_simple.c \
 	zlib-1.2.3/contrib/minizip/zip.c
 libminizip_la_LDFLAGS = -lz
+endif
+
+
+if INTERNAL_LIBURIPARSER
+AM_CPPFLAGS += -I$(top_srcdir)/third_party/$(uriparser)/include
+lib_LTLIBRARIES += liburiparser.la
 
 liburiparser_la_SOURCES = \
 	$(uriparser)/lib/UriCommon.c \
@@ -35,7 +42,10 @@ liburiparser_la_SOURCES = \
 	$(uriparser)/lib/UriResolve.c \
 	$(uriparser)/lib/UriShorten.c
 liburiparser_la_LDFLAGS = -version-info 1:5:0
+endif
 
+
+if INTERNAL_BOOST
 boost_root = boost_1_34_1
 boost = $(boost_root)/boost
 boostinc = $(includedir)/kml/third_party/$(boost)
@@ -76,6 +86,10 @@ libboostconfigplatformincludedir = $(boostinc)/config/platform
 libboostconfigplatforminclude_HEADERS = \
 	$(boost)/config/platform/linux.hpp \
 	$(boost)/config/platform/macos.hpp
+endif
+
+AM_CPPFLAGS += -I$(top_srcdir)/third_party/googletest-r108 \
+	      -I$(top_srcdir)/third_party/googletest-r108/include
 
 googletest = googletest-r108
 libgtest_la_SOURCES = \