Add CMake install dir

Signed-off-by: Darby Johnston <[email protected]>

Author: darbyjohnston

setup.py

@@ -110,6 +110,7 @@ def generate_cmake_arguments(self):
             '-DOTIO_CXX_INSTALL:BOOL=OFF',
             '-DOTIO_SHARED_LIBS:BOOL=OFF',
             '-DCMAKE_BUILD_TYPE=' + self.build_config,
+            '-DCMAKE_INSTALL_PREFIX=' + install_dir,
             '-DOTIO_PYTHON_INSTALL_DIR=' + install_dir,
             # turn off the C++ tests during a Python build
             '-DBUILD_TESTING:BOOL=OFF',