When compiling libssp, ssp.c, function __guard_setup: O_RDONLY is undeclared (ssp.c:93:34), ssize_t is an unknown type name (ssp.c:96:7), and size_t is an unknown type name (ssp.c:113:25).
../../src/gcc-7.2.0/configure --target=$TARGET --prefix=$PREFIX --with-cpu=cortex-m4 --with-fpu=fpv4-sp-d16 --with-float=hard --with-mode=thumb --enable-multilib --enable-interwork --enable-languages=c,c++ --with-system-zlib --with-newlib --disable-shared --disable-nls --with-gnu-as --with-gnu-ld A bootstrap C compiler is generated properly when passing --without-headers. I can provide more details and command output. Recently I was able to get 6.3.0 as close to working with Newlib 2.5 as I can tell, so this is not extremely urgent. Unfortunately I may have other questions about earlier GCC versions. Any suggestions related to generating cross toolchains, specifically generating a toolchain close to the one found at https://developer.arm.com/open-source/gnu-toolchain/gnu-rm, would be extremely helpful. Any help provided will be used to better support for generating toolchains with the crossdev project. I am very confused and what I want to do seems to be poorly documented. Thanks in advance, R0b0t1.
