TARGET_LIBGCC2_CFLAGS=
-GNATLIBCFLAGS= -g -O2
-+GNATLIBCFLAGS= -O2
++GNATLIBCFLAGS:= -O2
# Get target-specific overrides for TARGET_LIBGCC2_CFLAGS
# and possibly GNATLIBCFLAGS. Currently this uses files
# in gcc/config. The 'subst' call is used to rerelativize them