On gcc-4.8-20120701 it does not work either:
echo timestamp > s-genrtl-h
gcc -g -O2 -DIN_GCC -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wmissing-format-attribute -pedantic -Wno-long-long
-Wno-variadic-macros -Wno-overlength-strings
-Wold-style-definition -Wc++-compat -fno-common -DHAVE_CONFIG_H
-DGENERATOR_FILE -o build/gengtype \
build/gengtype.o build/errors.o build/gengtype-lex.o
build/gengtype-parse.o build/gengtype-state.o build/version.o
../build-i486-pc-linux-gnu/libiberty/libiberty.a
build/genmodes -m > tmp-min-modes.c
/bin/bash ../../gcc/../move-if-change tmp-min-modes.c
min-insn-modes.c
echo timestamp > s-modes-m
build/genenums ../../gcc/config/i386/i386.md \
> tmp-enums.c
build/gengtype.o: In function `adjust_field_type':
/root/gdc/dev/gcc-4.8-20120701/objdir/gcc/../../gcc/gengtype.c:1279:
undefined reference to `lexer_line'
build/gengtype.o: In function `adjust_field_rtx_def':
/root/gdc/dev/gcc-4.8-20120701/objdir/gcc/../../gcc/gengtype.c:989:
undefined reference to `lexer_line'
build/gengtype.o: In function `adjust_field_type':
/root/gdc/dev/gcc-4.8-20120701/objdir/gcc/../../gcc/gengtype.c:1294:
undefined reference to `lexer_line'
