This breaks building with gcc-4.3.

g++ -std=gnu++98 -fno-PIE -c  -DUSE_LIBUNWIND_EXCEPTIONS  -g -DIN_GCC     
-fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wwrite-strings 
-Wcast-qual -Wno-format -Wmissing-format-attribute -Woverloaded-virtual 
-pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings  
-Wno-implicit-fallthrough -DHAVE_CONFIG_H -I. -I. -I../../gcc -I../../gcc/. 
-I../../gcc/../include -I../../gcc/../libcpp/include  
-I../../gcc/../libdecnumber -I../../gcc/../libdecnumber/dpd -I../libdecnumber 
-I../../gcc/../libbacktrace   -o insn-emit.o -MT insn-emit.o -MMD -MP -MF 
./.deps/insn-emit.TPo insn-emit.c
cc1plus: error: unrecognized command line option "-Wno-implicit-fallthrough"
make[3]: *** [insn-emit.o] Error 1

Andreas.

-- 
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."

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