[Clfs-support] CLFS Embedded has build error when build gcc on Ubuntu 19.04

[DELUGE]

Hi,
When I build gcc 6.2 following http://clfs.org/view/clfs-embedded/x86/cross-tools/gcc-static.html on Ubuntu 19.04<http://clfs.org/view/clfs-embedded/x86/cross-tools/gcc-static.html%20on%20Ubuntu%2019.04> using gcc 8.3,
The error below occurred. Can anyone tell me how can I resolve this problem? Thanks.

make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/mnt/clfs/sources/gcc-build/fixincludes'
make[1]: Entering directory '/mnt/clfs/sources/gcc-build/gcc'
g++ -fno-PIE -c   -g -O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE   -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H -I. -I. -I../../gcc-6.2.0/gcc -I../../gcc-6.2.0/gcc/. -I../../gcc-6.2.0/gcc/../include -I../../gcc-6.2.0/gcc/../libcpp/include -I/mnt/clfs/sources/gcc-build/./gmp -I/mnt/clfs/sources/gcc-6.2.0/gmp -I/mnt/clfs/sources/gcc-build/../gcc-6.2.0/mpfr/src -I/mnt/clfs/sources/gcc-6.2.0/mpc/src  -I../../gcc-6.2.0/gcc/../libdecnumber -I../../gcc-6.2.0/gcc/../libdecnumber/dpd -I../libdecnumber -I../../gcc-6.2.0/gcc/../libbacktrace   -o ubsan.o -MT ubsan.o -MMD -MP -MF ./.deps/ubsan.TPo ../../gcc-6.2.0/gcc/ubsan.c
../../gcc-6.2.0/gcc/ubsan.c: In function 'bool ubsan_use_new_style_p(location_t)':
../../gcc-6.2.0/gcc/ubsan.c:1472:23: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
       || xloc.file == '\0' || xloc.file[0] == '\xff'
                       ^~~~
make[1]: *** [Makefile:1085: ubsan.o] Error 1
make[1]: Leaving directory '/mnt/clfs/sources/gcc-build/gcc'
make: *** [Makefile:4121: all-gcc] Error 2
clfs at tangye-lubu:/mnt/clfs/sources/gcc-build$ make[1]: *** [Makefile:1085: ubsan.o] Error 1
make[1]:: command not found
clfs at tangye-lubu:/mnt/clfs/sources/gcc-build$ make[1]: Leaving directory '/mnt/clfs/sources/gcc-build/gcc'
make[1]:: command not found
clfs at tangye-lubu:/mnt/clfs/sources/gcc-build$ make: *** [Makefile:4121: all-gcc] Error 2
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