[Bug bootstrap/56182] New: [4.6 Regression] gcc/config/i386/t-linux64:29: recipe commences before first target

["wbrana at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56182

             Bug #: 56182
           Summary: [4.6 Regression] gcc/config/i386/t-linux64:29: recipe
                    commences before first target
    Classification: Unclassified
           Product: gcc
           Version: 4.6.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: wbrana@gmail.com


Branch 4.6 fails to build. There is probably backslash missing in file
gcc/config/i386/t-linux64.

make[3]: Entering directory
`/mnt/md3/cache/portage/sys-devel/gcc-4.6.4_pre9999/work/build/gcc'
/mnt/md3/cache/portage/sys-devel/gcc-4.6.4_pre9999/work/gcc-4.6.4-9999/gcc/config/i386/t-linux64:29:
*** recipe commences before first target.  Stop.
make[3]: Leaving directory
`/mnt/md3/cache/portage/sys-devel/gcc-4.6.4_pre9999/work/build/gcc'
make[2]: *** [all-stage1-gcc] Error 2
make[2]: Leaving directory
`/mnt/md3/cache/portage/sys-devel/gcc-4.6.4_pre9999/work/build'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory
`/mnt/md3/cache/portage/sys-devel/gcc-4.6.4_pre9999/work/build'
make: *** [bootstrap-lean] Error 2

branch 4.7 was built successfully on same machine

configure --prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.6.4-pre9999
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.4-pre9999/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.4-pre9999
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.4-pre9999/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.4-pre9999/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.4-pre9999/include/g++-v4
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --disable-altivec
--disable-fixed-point --without-ppl --without-cloog --enable-lto --disable-nls
--with-system-zlib --enable-obsolete --disable-werror --enable-secureplt
--enable-multilib --disable-libmudflap --disable-libssp --disable-libgomp
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/4.6.4-pre9999/python
--enable-checking=release --disable-libgcj --disable-libquadmath
--enable-languages=c --enable-shared --enable-threads=posix
--enable-__cxa_atexit --enable-clocale=gnu --enable-targets=all