Error In libssp, But Disabled in Configuration

[R0b0t1]

On Sun, Feb 18, 2018 at 1:42 AM, R0b0t1 <r030t1@gmail.com> wrote:
> Taking inspiration from
> https://github.com/FreddieChopin/bleeding-edge-toolchain, I have a
> script which runs:
>
>     ../../source/${dname}/configure \
>         --target=${TARGET} \
>         --enable-languages=c \
>         --without-headers \
>         --prefix=`realpath ../../${DIR_PREFIX}` \
>         --libexecdir=`realpath ../../${DIR_PREFIX}/lib`
>         --disable-decimal-float \
>         --disable-libffi \
>         --disable-libgomp \
>         --disable-libmudflap \
>         --disable-libquadmath \
>         --disable-libssp \
>         --disable-libstdcxx-pch \
>         --disable-nls \
>         --disable-shared \
>         --disable-threads \
>         --disable-tls \
>         --with-newlib \
>         --with-gnu-as \
>         --with-gnu-ld \
>         --with-sysroot=`realpath ../../${DIR_PREFIX}/${TARGET}` \
>         --with-system-zlib \
>         --with-gmp=`realpath ../../${DIR_PREFIX}/host/${gmp_dname}` \
>         --with-mpfr=`realpath ../../${DIR_PREFIX}/host/${mpfr_dname}` \
>         --with-mpc=`realpath ../../${DIR_PREFIX}/host/${mpc_dname}` \
>         --with-isl=`realpath ../../${DIR_PREFIX}/host/${isl_dname}` \
>         --with-pkgversion=${VERSION}
>
> (libssp is disabled as it is provided by newlib.) When compiling GCC,
> an attempt to build libssp is made, and this fails with the following:
>
> ../../../../source/gcc-7.3.0/libssp/ssp.c: In function ‘__guard_setup’:
> ../../../../source/gcc-7.3.0/libssp/ssp.c:93:12: warning: implicit
> declaration of function ‘open’ [-Wimplicit-function-declaration]
>    int fd = open ("/dev/urandom", O_RDONLY);
>             ^~~~
> ../../../../source/gcc-7.3.0/libssp/ssp.c:93:34: error: ‘O_RDONLY’
> undeclared (first use in this function)
>    int fd = open ("/dev/urandom", O_RDONLY);
>                                   ^~~~~~~~
> ../../../../source/gcc-7.3.0/libssp/ssp.c:93:34: note: each undeclared
> identifier is reported only once for each function it appears in
> ../../../../source/gcc-7.3.0/libssp/ssp.c:96:7: error: unknown type
> name ‘ssize_t’
>        ssize_t size = read (fd, &__stack_chk_guard,
>        ^~~~~~~
> ../../../../source/gcc-7.3.0/libssp/ssp.c:96:22: warning: implicit
> declaration of function ‘read’ [-Wimplicit-function-declaration]
>        ssize_t size = read (fd, &__stack_chk_guard,
>                       ^~~~
> ../../../../source/gcc-7.3.0/libssp/ssp.c:98:7: warning: implicit
> declaration of function ‘close’ [-Wimplicit-function-declaration]
>        close (fd);
>        ^~~~~
> ../../../../source/gcc-7.3.0/libssp/ssp.c: At top level:
> ../../../../source/gcc-7.3.0/libssp/ssp.c:113:25: error: unknown type
> name ‘size_t’
>  fail (const char *msg1, size_t msg1len, const char *msg3)
>                          ^~~~~~
> ../../../../source/gcc-7.3.0/libssp/ssp.c: In function ‘__stack_chk_fail’:
> ../../../../source/gcc-7.3.0/libssp/ssp.c:185:3: warning: implicit
> declaration of function ‘fail’ [-Wimplicit-function-declaration]
>    fail (msg, strlen (msg), "stack smashing detected: terminated");
>    ^~~~
> ../../../../source/gcc-7.3.0/libssp/ssp.c:185:14: warning: implicit
> declaration of function ‘strlen’ [-Wimplicit-function-declaration]
>    fail (msg, strlen (msg), "stack smashing detected: terminated");
>               ^~~~~~
> ../../../../source/gcc-7.3.0/libssp/ssp.c:185:14: warning:
> incompatible implicit declaration of built-in function ‘strlen’
> ../../../../source/gcc-7.3.0/libssp/ssp.c:185:14: note: include
> ‘<string.h>’ or provide a declaration of ‘strlen’
> ../../../../source/gcc-7.3.0/libssp/ssp.c: In function ‘__chk_fail’:
> ../../../../source/gcc-7.3.0/libssp/ssp.c:192:14: warning:
> incompatible implicit declaration of built-in function ‘strlen’
>    fail (msg, strlen (msg), "buffer overflow detected: terminated");
>               ^~~~~~
> ../../../../source/gcc-7.3.0/libssp/ssp.c:192:14: note: include
> ‘<string.h>’ or provide a declaration of ‘strlen’
> make[2]: *** [Makefile:487: ssp.lo] Error 1
>
>
> I've attempted to search for a solution, but they were all more or
> less "disable libssp."
>

All I've found is this has some interaction with the selection of
target (arm-none-eabi), but I don't know why or how to fix it.

> Thanks in advance,
>      R0b0t1