llvmPackages.compiler-rt: Use FreeBSD headers during noLibc build

, libllvm

, libcxx

, linuxHeaders

, freebsd

, libxcrypt

# Some platforms have switched to using compiler-rt, but still want a

    ++ [ python3 libllvm.dev ]

    ++ lib.optional stdenv.isDarwin xcbuild.xcrun;

  buildInputs =

    lib.optional (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isRiscV) linuxHeaders;

    lib.optional (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isRiscV) linuxHeaders

    ++ lib.optional (stdenv.hostPlatform.isFreeBSD) freebsd.include;

  env.NIX_CFLAGS_COMPILE = toString ([

    "-DSCUDO_DEFAULT_OPTIONS=DeleteSizeMismatch=0:DeallocationTypeMismatch=0"

  '') + ''

    substituteInPlace lib/builtins/int_util.c \

      --replace "#include <stdlib.h>" ""

  '' + (if stdenv.hostPlatform.isFreeBSD then

    # As per above, but in FreeBSD assert is a macro and simply allowing it to be implicitly declared causes Issues!!!!!

  '' + (lib.optionalString (!stdenv.hostPlatform.isFreeBSD)

    # On FreeBSD, assert/static_assert are macros and allowing them to be implicitly declared causes link errors.

    # see description above for why we're nuking assert.h normally but that doesn't work here.

    # instead, we add the freebsd.include dependency explicitly

    ''

    substituteInPlace lib/builtins/clear_cache.c lib/builtins/cpu_model${lib.optionalString (lib.versionAtLeast version "18") "/x86"}.c \

      --replace "#include <assert.h>" "#define assert(e) ((e)?(void)0:__assert(__FUNCTION__,__FILE__,__LINE__,#e))"

    '' else ''

    substituteInPlace lib/builtins/clear_cache.c \

      --replace "#include <assert.h>" ""

    substituteInPlace lib/builtins/cpu_model${lib.optionalString (lib.versionAtLeast version "18") "/x86"}.c \