[Bug bootstrap/53459] New: ../../work/libcpp/lex.c:593:18: error: typedef 'check_count' locally defined but not used

["dominiq at lps dot ens.fr" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53459

             Bug #: 53459
           Summary: ../../work/libcpp/lex.c:593:18: error: typedef
                    'check_count' locally defined but not used
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: dominiq@lps.ens.fr
                CC: dodji@gcc.gnu.org
              Host: powerpc-apple-darwin9
            Target: powerpc-apple-darwin9
             Build: powerpc-apple-darwin9


On powerpc-apple-darwin9 bootstrap failed at r187775 with

...
/opt/gcc/darwin_buildw/./prev-gcc/g++ -B/opt/gcc/darwin_buildw/./prev-gcc/
-B/opt/gcc/gcc4.8w/powerpc-apple-darwin9.8.0/bin/ -nostdinc++
-B/opt/gcc/darwin_buildw/prev-powerpc-apple-darwin9.8.0/libstdc++-v3/src/.libs
-B/opt/gcc/darwin_buildw/prev-powerpc-apple-darwin9.8.0/libstdc++-v3/libsupc++/.libs
-I/opt/gcc/darwin_buildw/prev-powerpc-apple-darwin9.8.0/libstdc++-v3/include/powerpc-apple-darwin9.8.0
-I/opt/gcc/darwin_buildw/prev-powerpc-apple-darwin9.8.0/libstdc++-v3/include
-I/opt/gcc/work/libstdc++-v3/libsupc++
-L/opt/gcc/darwin_buildw/prev-powerpc-apple-darwin9.8.0/libstdc++-v3/src/.libs
-L/opt/gcc/darwin_buildw/prev-powerpc-apple-darwin9.8.0/libstdc++-v3/libsupc++/.libs
 -I../../work/libcpp -I. -I../../work/libcpp/../include -I./../intl
-I../../work/libcpp/include  -g -O2 -mdynamic-no-pic -gtoggle -W -Wall
-Wno-narrowing -Wwrite-strings -Wmissing-format-attribute -pedantic
-Wno-long-long -Werror -fno-exceptions -fno-rtti -I../../work/libcpp -I.
-I../../work/libcpp/../include -I./../intl -I../../work/libcpp/include  -c -o
lex.o -MT lex.o -MMD -MP -MF .deps/lex.Tpo ../../work/libcpp/lex.c
../../work/libcpp/lex.c: In function 'const uchar* search_line_fast(const
uchar*, const uchar*)':
../../work/libcpp/lex.c:593:18: error: typedef 'check_count' locally defined
but not used [-Werror=unused-local-typedefs]
     typedef char check_count[(N == 2 || N == 4) * 2 - 1];

AFAICT check_count is indeed unused and removing the line allows bootstrap to
complete. This has probably been exposed by r187757.