Clifford Wolf:

package/base/gcc/config-300.hlp

@@ -52,3 +52,7 @@ ROCKCFG_PKG_GCC33_NO_JAVA
 ROCKCFG_PKG_GCC34_NO_JAVA
   Please check here if you don't want to build the gcc34 JAVA compiler.
 
+ROCKCFG_PKG_GCC34_PROFILED
+  Enables profiling during GCC bootstrap and so yields an optimised
+  compiler. Build speedup might be 5-10%.
+

package/base/gcc/config-300.in

@@ -103,6 +103,8 @@ then
 		comment '--- GCC 3.4.x options'
 		bool 'Do not build JAVA compiler' \
 				ROCKCFG_PKG_GCC34_NO_JAVA 0
+		bool 'Do profiled bootstrap' \
+				ROCKCFG_PKG_GCC34_PROFILED 1
 		%include package/*/*/subconfig-gcc34.in
 	fi
 

package/base/gcc/gcc.conf

@@ -204,7 +204,11 @@ custmain() {
 			--with-gnu-ld --enable-threads=posix
 
 		hook_eval premake
-		eval "$MAKE GCJFLAGS=\"$CXXFLAGS\" all"
+		if [ $xpkg = gcc34 -a "$ROCKCFG_PKG_GCC34_PROFILED" != 0 ]; then
+			eval "$MAKE GCJFLAGS=\"$CXXFLAGS\" profiledbootstrap"
+		else
+			eval "$MAKE GCJFLAGS=\"$CXXFLAGS\" all"
+		fi
 		hook_eval inmake
 		eval "$MAKE $makeinstopt install"
 
@@ -292,6 +296,25 @@ custmain() {
 		fi
 	fi
 
+	# Inject our default optimisation options so when the user calls
+	# gcc/g++ they match the ones used to precompile the headers ...
+	#
+	# Save the options affectioning optimization only - for injection into the specs
+	# file. They should be the gcc default options since they match the ones used
+	# to generate the PCHs. -ReneR
+	#
+	# Ideas for simplifications welcome ...
+	#
+	echo "Adapting gcc specs file..."
+	cd $root/$prefix/lib/${gcc_lib_dir}
+	mv specs specs.orig
+        tr '\n' '@' < specs.orig | sed -e "s|@\\*cc1_options:@|@*cc1_options:@$(
+		eval echo \$GCC_WRAPPER_INSERT \$GCC_WRAPPER_APPEND \
+		\$GCC${ver:0:1}_WRAPPER_INSERT \$GCC${ver:0:1}_WRAPPER_APPEND | \
+		tr ' ' '\n' | sed -e '/-O./ { p; d; }' -e '/-mcpu=.*/ { p; d; }' \
+		-e '/-march=.*/ { p; d; }' -e '/-mtune=.*/ { p; d; }' -e 'd' | tr '\n' ' '
+	) |" | tr '@' '\n' > specs
+
 	# Create symlinks for runtime libraries so they can be found by
 	# the dynamic loader and force rebuilding of the wrapper links
 	#
@@ -395,4 +418,5 @@ else
 fi
 
 gcc_lib_dir="gcc-lib/${pkg_gcc_target}/${ver%%-*}"
+[ $pkg_gcc_version = 34 ] && gcc_lib_dir="gcc/${pkg_gcc_target}/${ver%%-*}"