message: Do not build macOS target in Linux cross-build
diff: @@ -64,10 +64,7 @@ RUN git clone https://github.com/madler/zlib.git && cd zlib && mkdir build && cd
  WORKDIR /usr/local/src
  RUN git clone https://github.com/westes/flex.git && cd flex && git checkout v2.6.4 && ./autogen.sh && ./configure && make -j8 && make install
  -# MacOSX10.14.sdk to enable cross compilation to macOS.
  -COPY MacOSX10.14.sdk /usr/local/
  -
  # Build ISPC
  RUN mkdir build
  WORKDIR /usr/local/src/ispc/build
  -RUN cmake .. -DISPC_PREPARE_PACKAGE=ON -DISPC_CROSS=ON -DISPC_MACOS_SDK_PATH=/usr/local/MacOSX10.14.sdk && make -j8 package
  +RUN cmake .. -DISPC_PREPARE_PACKAGE=ON -DISPC_CROSS=ON && make -j8 package
  