--- a/make/conf/jib-profiles.js	Tue Jan 29 11:44:36 2019 -0600
+++ b/make/conf/jib-profiles.js	Tue Jan 29 10:09:13 2019 -0800
@@ -861,13 +861,13 @@
 var getJibProfilesDependencies = function (input, common) {
 
     var devkit_platform_revisions = {
-        linux_x64: "gcc7.3.0-OEL6.4+1.1",
+        linux_x64: "gcc7.3.0-OEL6.4+1.2",
         macosx_x64: "Xcode9.4-MacOSX10.13+1.0",
         solaris_x64: "SS12u4-Solaris11u1+1.0",
         solaris_sparcv9: "SS12u6-Solaris11u3+1.0",
         windows_x64: "VS2017-15.5.5+1.0",
-        linux_aarch64: "gcc7.3.0-Fedora27+1.1",
-        linux_arm: "gcc7.3.0-Fedora27+1.1"
+        linux_aarch64: "gcc7.3.0-Fedora27+1.2",
+        linux_arm: "gcc7.3.0-Fedora27+1.2"
     };
 
     var devkit_platform = (input.target_cpu == "x86"

--- a/make/devkit/Tools.gmk	Tue Jan 29 11:44:36 2019 -0600
+++ b/make/devkit/Tools.gmk	Tue Jan 29 10:09:13 2019 -0800
@@ -103,7 +103,7 @@
 GCC := http://ftp.gnu.org/pub/gnu/gcc/$(gcc_ver)/$(gcc_ver).tar.xz
 BINUTILS := http://ftp.gnu.org/pub/gnu/binutils/$(binutils_ver).tar.xz
 CCACHE := https://samba.org/ftp/ccache/$(ccache_ver).tar.xz
-MPFR := http://www.mpfr.org/${mpfr_ver}/${mpfr_ver}.tar.bz2
+MPFR := https://www.mpfr.org/${mpfr_ver}/${mpfr_ver}.tar.bz2
 GMP := http://ftp.gnu.org/pub/gnu/gmp/${gmp_ver}.tar.bz2
 MPC := http://ftp.gnu.org/pub/gnu/mpc/${mpc_ver}.tar.gz
 GDB := http://ftp.gnu.org/gnu/gdb/${gdb_ver}.tar.xz
@@ -355,6 +355,7 @@
 $(BUILDDIR)/$(binutils_ver)/Makefile : CONFIG += --enable-64-bit-bfd --libdir=$(PREFIX)/$(word 1,$(LIBDIRS))
 
 # Makefile creation. Simply run configure in build dir.
+# Setting CFLAGS to -O2 generates a much faster ld.
 $(bfdmakes) \
 $(BUILDDIR)/$(binutils_ver)/Makefile \
     : $(BINUTILS_CFG)
@@ -362,7 +363,7 @@
 	@mkdir -p $(@D)
 	( \
 	  cd $(@D) ; \
-	  $(PATHPRE) $(ENVS) CFLAGS="$(CFLAGS)" \
+	  $(PATHPRE) $(ENVS) CFLAGS="-O2 $(CFLAGS)" \
 	      $(BINUTILS_CFG) \
 	      $(CONFIG) \
 	      --with-sysroot=$(SYSROOT) \
@@ -370,6 +371,7 @@
 	      --program-prefix=$(TARGET)- \
 	      --enable-multilib \
 	      --enable-gold \
+	      --enable-threads \
 	      --enable-plugins \
 	) > $(@D)/log.config 2>&1
 	@echo 'done'