--- a/make/devkit/Tools.gmk	Mon Mar 12 10:04:12 2018 -0400
+++ b/make/devkit/Tools.gmk	Mon Mar 12 17:00:54 2018 +0100
@@ -46,6 +46,16 @@
 ARCH := $(word 1,$(subst -, ,$(TARGET)))
 $(info ARCH=$(ARCH))
 
+ifeq ($(BASE_OS), OEL6)
+  OEL_URL := http://yum.oracle.com/repo/OracleLinux/OL6/4/base/$(ARCH)/
+  LINUX_VERSION := OEL6.4
+else ifeq ($(BASE_OS), Fedora27)
+  OEL_URL := https://dl.fedoraproject.org/pub/fedora-secondary/releases/27/Everything/$(ARCH)/os/Packages/
+  LINUX_VERSION := Fedora 27
+else
+  $(error Unknown base OS $(BASE_OS))
+endif
+
 ##########################################################################################
 # Define external dependencies
 
@@ -79,10 +89,7 @@
 MPC := http://ftp.gnu.org/pub/gnu/mpc/${mpc_ver}.tar.gz
 GDB := http://ftp.gnu.org/gnu/gdb/${gdb_ver}.tar.xz
 
-OEL_URL := http://yum.oracle.com/repo/OracleLinux/OL6/4/base/$(ARCH)/
-
-# RPMs in OEL6.4
-LINUX_VERSION := OEL6.4
+# RPMs used by all BASE_OS
 RPM_LIST := \
     kernel-headers \
     glibc glibc-headers glibc-devel \
@@ -180,10 +187,10 @@
       RPM_ARCHS += i386 i686
     endif
   endif
-else ifeq ($(ARCH),i686))
-  RPM_ARCHS := i386 i686
+else ifeq ($(ARCH),i686)
+  RPM_ARCHS := i386 i686 noarch
 else
-  RPM_ARCHS := $(ARCH)
+  RPM_ARCHS := $(ARCH) noarch
 endif
 
 RPM_FILE_LIST := $(sort $(foreach a, $(RPM_ARCHS), \
@@ -453,6 +460,12 @@
 	@echo 'done'
 
   $(gdb): $(gcc)
+else
+  $(BUILDDIR)/$(gdb_ver)/Makefile:
+	$(info Faking $@, not used when cross-compiling)
+	mkdir -p $(@D)
+	echo "install:" > $@
+	@echo 'done'
 endif
 
 ##########################################################################################
@@ -531,7 +544,7 @@
 	echo '' >> $@
 	echo 'DEVKIT_NAME="$(gcc_ver) - $(LINUX_VERSION)"' >> $@
 	echo 'DEVKIT_TOOLCHAIN_PATH="$$DEVKIT_ROOT/bin"' >> $@
-	echo 'DEVKIT_SYSROOT="$$DEVKIT_ROOT/$$host/sysroot"' >> $@
+	echo 'DEVKIT_SYSROOT="$$DEVKIT_ROOT/$(TARGET)/sysroot"' >> $@
 	echo 'DEVKIT_EXTRA_PATH="$$DEVKIT_ROOT/bin"' >> $@
 
 ##########################################################################################