diff --git a/acinclude.m4 b/acinclude.m4
index 6492e615..d368949b 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -515,12 +515,13 @@ else
 fi
 ])dnl ACX_PTHREAD
 
-dnl enable maximum compiler warnings
+dnl enable maximum compiler warnings.  must ignore unknown pragmas to
+dnl build on solaris.
 dnl we only know how to do this for g++
 AC_DEFUN([ACX_CXX_WARNINGS], [
 	AC_MSG_CHECKING([for C++ compiler warning flags])
 	if test "$GXX" = "yes"; then
-		acx_cxx_warnings="-Wall"
+		acx_cxx_warnings="-Wall -Wno-unknown-pragmas"
 	fi
 	if test -n "$acx_cxx_warnings"; then
 		CXXFLAGS="$CXXFLAGS $acx_cxx_warnings"
diff --git a/configure.in b/configure.in
index 3be75a98..e6fcbbe6 100644
--- a/configure.in
+++ b/configure.in
@@ -35,19 +35,17 @@ case $host in
 	*-*-mingw32* | *-*-windows*)
 	acx_host_arch="WIN32"
 	acx_host_winapi="MSWINDOWS"
-	ARCH_CFLAGS="$ARCH_CFLAGS -DSYSAPI_WIN32=1 -DWINAPI_MSWINDOWS=1"
 	;;
 	*-*-darwin*)
 	acx_host_arch="UNIX"
 	acx_host_winapi="CARBON"
-	ARCH_CFLAGS="$ARCH_CFLAGS -DSYSAPI_UNIX=1 -DWINAPI_CARBON=1"
 	;;
 	*)
 	acx_host_arch="UNIX"
 	acx_host_winapi="XWINDOWS"
-	ARCH_CFLAGS="$ARCH_CFLAGS -DSYSAPI_UNIX=1 -DWINAPI_XWINDOWS=1"
 	;;
 esac
+ARCH_CFLAGS="$ARCH_CFLAGS -DSYSAPI_$acx_host_arch=1 -DWINAPI_$acx_host_winapi=1"
 AM_CONDITIONAL(WIN32, test x$acx_host_arch = xWIN32)
 AM_CONDITIONAL(UNIX, test x$acx_host_arch = xUNIX)
 AM_CONDITIONAL(MSWINDOWS, test x$acx_host_winapi = xMSWINDOWS)
@@ -85,7 +83,7 @@ ACX_CHECK_INET_ATON
 
 dnl checks for header files
 AC_HEADER_STDC
-AC_CHECK_HEADERS([unistd.h sys/time.h sys/types.h wchar.h])
+AC_CHECK_HEADERS([unistd.h sys/time.h sys/types.h wchar.h alloca.h])
 AC_CHECK_HEADERS([sys/socket.h sys/select.h])
 AC_CHECK_HEADERS([istream ostream sstream])
 AC_HEADER_TIME
diff --git a/lib/arch/CArchNetworkBSD.cpp b/lib/arch/CArchNetworkBSD.cpp
index d8845801..27be0fea 100644
--- a/lib/arch/CArchNetworkBSD.cpp
+++ b/lib/arch/CArchNetworkBSD.cpp
@@ -34,6 +34,9 @@
 
 #if HAVE_POLL
 #	include <sys/poll.h>
+#	if HAVE_ALLOCA_H
+#		include <alloca.h>
+#	endif
 #else
 #	if HAVE_SYS_SELECT_H
 #		include <sys/select.h>
@@ -43,6 +46,13 @@
 #	endif
 #endif
 
+#if HAVE_ALLOCA_H
+#	define freea(x_)
+#else
+#	define alloca(x_) malloc(x_)
+#	define freea(x_) free(x_)
+#endif
+
 static const int s_family[] = {
 	PF_UNSPEC,
 	PF_INET
@@ -327,8 +337,10 @@ CArchNetworkBSD::pollSocket(CPollEntry pe[], int num, double timeout)
 		if (errno == EINTR) {
 			// interrupted system call
 			ARCH->testCancelThread();
+			freea(pfd);
 			return 0;
 		}
+		freea(pfd);
 		throwError(errno);
 	}
 
@@ -349,6 +361,7 @@ CArchNetworkBSD::pollSocket(CPollEntry pe[], int num, double timeout)
 		}
 	}
 
+	freea(pfd);
 	return n;
 }
 
diff --git a/lib/platform/CXWindowsScreenSaver.cpp b/lib/platform/CXWindowsScreenSaver.cpp
index 44c7c0b8..0b69f08f 100644
--- a/lib/platform/CXWindowsScreenSaver.cpp
+++ b/lib/platform/CXWindowsScreenSaver.cpp
@@ -27,6 +27,7 @@
 #endif
 #if defined(HAVE_X11_EXTENSIONS_DPMS_H)
 extern "C" {
+#	include <X11/Xmd.h>
 #	include <X11/extensions/dpms.h>
 }
 #endif