devel/gcc: Check and build GNU sed if not available on build host

Closes #2300

bare/config/devel/gnu-default-tools.bset

@@ -6,6 +6,12 @@
 
 %define gcc_version_message RTEMS bare %{rtems_version}, RSB %{_sbgit_id}, Newlib %{newlib_version}
 
+#
+# GCC requires a GNU sed so build an internal version if one is not
+# available
+#
+%include textproc/gsed-internal
+
 #
 # Build gdb first to raise the Python install error as early as
 # possible. GDB needs expat so it needs to be built before gdb.

rtems/config/tools/rtems-default-tools.bset

@@ -2,6 +2,11 @@
 # Default tools build
 #
 
+# GCC requires a GNU sed so build an internal version if one is not
+# available
+#
+%include textproc/gsed-internal.bset
+
 #
 # Build gdb first to raise the Python install error as early as
 # possible. GDB needs expat so it needs to be built before gdb.

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

@@ -165,6 +165,10 @@ URL: 	   http://gcc.gnu.org/
 %build
   build_top=$(pwd)
 
+  %if %{defined _internal_gsed_path}
+    export PATH=%{_internal_gsed_path}/bin:$PATH
+  %endif
+
   %{build_directory}
 
   mkdir -p ${build_dir}