Add GCC 7 base configuration

rtems/config/tools/rtems-gcc-7.1.0-newlib-2.5.0.20170323-1.cfg

@@ -68,4 +68,4 @@
 %define with_plugin  0
 %define with_iconv   1
 
-%include %{_configdir}/gcc-6-1.cfg
+%include %{_configdir}/gcc-7-1.cfg

source-builder/config/gcc-7-1.cfg

@@ -0,0 +1,31 @@
+#
+# GCC 7 Version 1.
+#
+# This configuration file configure's, make's and install's gcc. It uses
+# newlib, MPFR, MPC, and GMP in a one-tree build configuration.
+#
+
+#
+# Source
+#
+#
+# GCC core and G++
+#
+%source set gcc https://ftp.gnu.org/gnu/gcc/gcc-%{gcc_version}/gcc-%{gcc_version}.tar.bz2
+
+#
+# Newlib
+#
+%source set newlib ftp://sourceware.org/pub/newlib/newlib-%{newlib_version}.tar.gz
+
+#
+# Packages GCC requires
+#
+%source set mpfr https://ftp.gnu.org/gnu/mpfr/mpfr-%{mpfr_version}.tar.bz2
+%source set mpc https://ftp.gnu.org/gnu/mpc/mpc-%{mpc_version}.tar.gz
+%source set gmp https://ftp.gnu.org/gnu/gmp/gmp-%{gmp_version}.tar.bz2
+
+#
+# GCC Common build script.
+#
+%include %{_configdir}/gcc-common-1.cfg