pi@raspberrypi:~/ppsspp_rpi4 $ cmake . -DCMAKE_TOOLCHAIN_FILE=cmake/Toolchains/raspberry.armv7.cmake
-- The C compiler identification is Clang 7.0.1
-- The CXX compiler identification is Clang 7.0.1
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- broken
CMake Error at /usr/share/cmake-3.13/Modules/CMakeTestCCompiler.cmake:52 (message):
  The C compiler

    "/usr/bin/cc"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: /home/pi/ppsspp_rpi4/CMakeFiles/CMakeTmp

    Run Build Command:"/usr/bin/make" "cmTC_9c707/fast"
    /usr/bin/make -f CMakeFiles/cmTC_9c707.dir/build.make CMakeFiles/cmTC_9c707.dir/build
    make[1]: Entering directory '/home/pi/ppsspp_rpi4/CMakeFiles/CMakeTmp'
    Building C object CMakeFiles/cmTC_9c707.dir/testCCompiler.c.o
    /usr/bin/cc  -isystem /opt/vc/include -isystem /opt/vc/include/interface/vcos/pthreads -isystem /opt/vc/include/interface/vmcx_host/linux  -march=armv7-a+neon-vfpv4 -mcpu=cortex-a72 -mtune=cortex-a72 -mfpu=neon-vfpv4 -mfloat-abi=hard -march=armv7-a+neon-vfpv4 -mcpu=cortex-a72 -mtune=cortex-a72 -mfpu=neon-vfpv4 -mfloat-abi=hard -march=armv7-a+neon-vfpv4 -mcpu=cortex-a72 -mtune=cortex-a72 -mfpu=neon-vfpv4 -mfloat-abi=hard    -o CMakeFiles/cmTC_9c707.dir/testCCompiler.c.o   -c /home/pi/ppsspp_rpi4/CMakeFiles/CMakeTmp/testCCompiler.c
    clang: error: the clang compiler does not support '-march=armv7-a+neon-vfpv4'
    make[1]: *** [CMakeFiles/cmTC_9c707.dir/build.make:66: CMakeFiles/cmTC_9c707.dir/testCCompiler.c.o] Error 1
    make[1]: Leaving directory '/home/pi/ppsspp_rpi4/CMakeFiles/CMakeTmp'
    make: *** [Makefile:121: cmTC_9c707/fast] Error 2




  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:3 (project)


-- Configuring incomplete, errors occurred!
See also "/home/pi/ppsspp_rpi4/CMakeFiles/CMakeOutput.log".
See also "/home/pi/ppsspp_rpi4/CMakeFiles/CMakeError.log".
pi@raspberrypi:~/ppsspp_rpi4 $