search for: dcmake_c_compiler_work

...dlltool) and static libraries, so libclang_rt isn't needed yet. (The autoconf scripts for these bits define AC_NO_EXECUTABLES, which avoids bailing out due to the compiler not being able to link an executable.) After this step, I build the compiler-rt builtins, and this is configured with -DCMAKE_C_COMPILER_WORKS=1 to (iirc) make it not bail out even though the toolchain still can't link anything. After building the compiler-rt builtins, and installing them, the toolchain finally is complete enough to link a working C program. After this stage, higher level runtimes like libc++ can be built on top,...