remove precompiled headers at configure time

dkarm-eabi/scripts/build-gcc.sh

@@ -49,6 +49,7 @@ then
         --with-gcc --with-gnu-ld --with-gnu-as \
         --disable-shared --disable-threads --disable-win32-registry --disable-nls --disable-debug\
         --disable-libmudflap --disable-libssp \
+        --disable-libstdcxx-pch \
         --target=$target \
         --with-newlib \
         --prefix=$prefix\

dkppc/scripts/build-gcc.sh

@@ -85,6 +85,7 @@ then
 	--with-included-gettext --without-headers\
 	--disable-nls --disable-shared --enable-threads --disable-multilib --disable-debug\
 	--disable-win32-registry\
+    --disable-libstdcxx-pch \
 	--target=$target \
 	--with-newlib \
 	--prefix=$prefix\

dkpsp/scripts/build-gcc.sh

@@ -47,6 +47,7 @@ then
 	--with-gcc --with-gnu-ld --with-gnu-as\
 	--disable-shared --disable-win32-registry --disable-nls\
 	--enable-cxx-flags="-G0" \
+    --disable-libstdcxx-pch \
 	--target=$target \
 	--with-newlib \
 	--prefix=$prefix \