Index: src/build/libroot/errors.cpp
===================================================================
--- src/build/libroot/errors.cpp	(revision 43238)
+++ src/build/libroot/errors.cpp	(working copy)
@@ -74,18 +74,24 @@
 	ADD_ERROR(EOPNOTSUPP);
 	ADD_ERROR(ENOTSOCK);
 	ADD_ERROR(EHOSTDOWN);
-	ADD_ERROR(EBADMSG);
+	#ifdef EBADMSG
+		ADD_ERROR(EBADMSG);
+	#endif
 	#ifdef ECANCELED
 		ADD_ERROR(ECANCELED);
 	#endif
 	ADD_ERROR(EDESTADDRREQ);
 	ADD_ERROR(EDQUOT);
 	ADD_ERROR(EIDRM);
-	ADD_ERROR(EMULTIHOP);
+	#ifdef EMULTIHOP
+		ADD_ERROR(EMULTIHOP);
+	#endif
 	#ifdef ENODATA
 		ADD_ERROR(ENODATA);
 	#endif
-	ADD_ERROR(ENOLINK);
+	#ifdef ENOLINK
+		ADD_ERROR(ENOLINK);
+	#endif
 	#ifdef ENOSR
 		ADD_ERROR(ENOSR);
 	#endif
@@ -93,7 +99,9 @@
 		ADD_ERROR(ENOSTR);
 	#endif
 	ADD_ERROR(ENOTSUP);
-	ADD_ERROR(EPROTO);
+	#ifdef EPROTO
+		ADD_ERROR(EPROTO);
+	#endif
 	#ifdef ETIME
 		ADD_ERROR(ETIME);
 	#endif
Index: src/tools/fs_shell/unistd.cpp
===================================================================
--- src/tools/fs_shell/unistd.cpp	(revision 43238)
+++ src/tools/fs_shell/unistd.cpp	(working copy)
@@ -21,7 +21,8 @@
 #	include <Drivers.h>
 #else
 #	if defined(HAIKU_HOST_PLATFORM_FREEBSD) \
-		|| defined(HAIKU_HOST_PLATFORM_DARWIN)
+		|| defined(HAIKU_HOST_PLATFORM_DARWIN) \
+		|| defined(HAIKU_HOST_PLATFORM_OPENBSD)
 #		include <sys/ioctl.h>
 #		include <sys/stat.h>
 #		include <sys/disk.h>
Index: build/scripts/build_cross_tools_gcc4
===================================================================
--- build/scripts/build_cross_tools_gcc4	(revision 43238)
+++ build/scripts/build_cross_tools_gcc4	(working copy)
@@ -112,6 +112,7 @@
 cd $binutilsObjDir
 CFLAGS="-O2" CXXFLAGS="-O2" $binutilsSourceDir/configure \
 	--prefix=$installDir --target=$haikuMachine --disable-nls \
+	--with-ppl=/usr/local \
 	--disable-shared --disable-werror $binutilsConfigureArgs || exit 1
 $MAKE $additionalMakeArgs || exit 1
 $MAKE $additionalMakeArgs install || exit 1
@@ -144,7 +145,8 @@
 cd $gccObjDir
 CFLAGS="-O2" CXXFLAGS="-O2" $gccSourceDir/configure --prefix=$installDir \
 	--target=$haikuMachine --disable-nls --disable-shared \
-	--enable-languages=c,c++ \
+	--enable-languages=c,c++ --disable-lto \
+	--with-ppl=/usr/local --disable-libstdcxx-pch \
 	--with-headers=$tmpIncludeDir --with-libs=$tmpLibDir \
 	$gccConfigureArgs || exit 1
 
Index: build/jam/BuildSetup
===================================================================
--- build/jam/BuildSetup	(revision 43238)
+++ build/jam/BuildSetup	(working copy)
@@ -679,6 +679,7 @@
 	case linux	: HOST_DEBUG_FLAGS ?= -ggdb ;
 	case freebsd	: HOST_DEBUG_FLAGS ?= -ggdb ;
 	case darwin	: HOST_DEBUG_FLAGS ?= -ggdb ;
+	case openbsd	: HOST_DEBUG_FLAGS ?= -ggdb ;
 	case *		: HOST_DEBUG_FLAGS ?= -g ;
 }
 
@@ -1004,6 +1005,7 @@
 	case linux		: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_LINUX ;
 	case freebsd	: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_FREEBSD ;
 	case darwin		: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_DARWIN ;
+	case openbsd		: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_OPENBSD ;
 	case cygwin		: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_CYGWIN ;
 	case sunos		: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_SUNOS ;
 	case libbe_test	: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_LIBBE_TEST ;
@@ -1018,6 +1020,7 @@
 	case linux		: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_LINUX ;
 	case freebsd	: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_FREEBSD ;
 	case darwin		: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_DARWIN ;
+	case openbsd		: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_OPENBSD ;
 	case cygwin		: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_CYGWIN ;
 	case sunos		: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_SUNOS ;
 }
Index: headers/build/BeOSBuildCompatibility.h
===================================================================
--- headers/build/BeOSBuildCompatibility.h	(revision 43238)
+++ headers/build/BeOSBuildCompatibility.h	(working copy)
@@ -44,7 +44,9 @@
 extern size_t   strlcpy(char* dest, const char* source, size_t length);
 extern size_t	strlcat(char* dest, const char* source, size_t length);
 
-#if defined(HAIKU_HOST_PLATFORM_FREEBSD) || defined(HAIKU_HOST_PLATFORM_DARWIN)
+#if defined(HAIKU_HOST_PLATFORM_FREEBSD) \
+	|| defined(HAIKU_HOST_PLATFORM_DARWIN) \
+	|| defined(HAIKU_HOST_PLATFORM_OPENBSD)
 extern size_t	strnlen(const char* string, size_t length);
 #endif