[Bug bootstrap/64320] New: Missing config.h during findcomp.cc compilation

[townsend at astro dot wisc.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64320

            Bug ID: 64320
           Summary: Missing config.h during findcomp.cc compilation
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: townsend at astro dot wisc.edu

I'm trying to build the latest trunk (rev. 218759) on Linux. Configuring with:

 ./configure CC=gcc --build=x86_64-pc-linux-gnu --prefix=/root/madsdk
--with-gmp=/root/madsdk --with-mpfr=/root/madsdk --with-mpc=/root/madsdk
--enable-languages=c,c++,fortran --disable-multilib --disable-nls
--disable-libsanitizer

...I get the following error during make:

libtool: compile:  /root/madsdk-src/gcc/host-x86_64-pc-linux-gnu/gcc/xg++
-B/root/madsdk-src/gcc/host-x86_64-pc-linux-gnu/gcc/ -nostdinc++ -nostdinc++
-I/root/madsdk-src/gcc/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/root/madsdk-src/gcc/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/root/madsdk-src/gcc/libstdc++-v3/libsupc++
-I/root/madsdk-src/gcc/libstdc++-v3/include/backward
-I/root/madsdk-src/gcc/libstdc++-v3/testsuite/util
-L/root/madsdk-src/gcc/x86_64-pc-linux-gnu/libstdc++-v3/src
-L/root/madsdk-src/gcc/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/root/madsdk-src/gcc/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/root/madsdk-src/gcc/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-B/root/madsdk-src/gcc/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/root/madsdk/x86_64-pc-linux-gnu/bin/ -B/root/madsdk/x86_64-pc-linux-gnu/lib/
-isystem /root/madsdk/x86_64-pc-linux-gnu/include -isystem
/root/madsdk/x86_64-pc-linux-gnu/sys-include -DHAVE_CONFIG_H -I.
-I../.././libcc1 -I ../.././libcc1/../include -I ../.././libcc1/../libgcc -I
../host-x86_64-pc-linux-gnu/gcc -I../.././libcc1/../gcc -I
../.././libcc1/../gcc/c -I ../.././libcc1/../gcc/c-family -I
../.././libcc1/../libcpp/include -I/root/madsdk/include -I/root/madsdk/include
-I/root/madsdk/include -W -Wall -fvisibility=hidden -g -O2 -D_GNU_SOURCE -MT
findcomp.lo -MD -MP -MF .deps/findcomp.Tpo -c ../.././libcc1/findcomp.cc  -fPIC
-DPIC -o .libs/findcomp.o
../.././libcc1/findcomp.cc:20:20: fatal error: config.h: No such file or
directory
compilation terminated.
make[3]: *** [findcomp.lo] Error 1
make[3]: Leaving directory
`/root/madsdk-src/gcc/host-x86_64-pc-linux-gnu/libcc1'
make[2]: *** [all] Error 2
make[2]: Leaving directory
`/root/madsdk-src/gcc/host-x86_64-pc-linux-gnu/libcc1'
make[1]: *** [all-libcc1] Error 2
make[1]: Leaving directory `/root/madsdk-src/gcc'
make: *** [all] Error 2

When attempting to build on OS X (10.6), I get the exact same error.