--- gcc-5.3.0.ebuild	2015-12-25 15:47:05.161449925 +0100
+++ gcc-5.3.0-r1.ebuild	2015-12-26 16:58:00.088032390 +0100
@@ -20,7 +20,7 @@
 SSP_UCLIBC_STABLE="x86 amd64 mips ppc ppc64 arm"
 #end Hardened stuff
 
-inherit toolchain
+inherit check-reqs toolchain
 
 KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86"
 
@@ -33,6 +33,16 @@
 	PDEPEND="${PDEPEND} elibc_glibc? ( >=sys-libs/glibc-2.8 )"
 fi
 
+pkg_pretend() {
+	# Ensure we have enough disk space to compile
+	if use debug ; then
+		CHECKREQS_DISK_BUILD="4500M"
+	else
+		CHECKREQS_DISK_BUILD="4000M"
+	fi
+	check-reqs_pkg_setup
+}
+
 src_prepare() {
 	if has_version '<sys-libs/glibc-2.12' ; then
 		ewarn "Your host glibc is too old; disabling automatic fortify."