Add support for Ninja generator

Fixes baldurk/renderdoc#1126

qrenderdoc/CMakeLists.txt

@@ -84,6 +84,12 @@ if(APPLE)
     set(SWIG_CONFIGURE_CXX "")
 endif()
 
+set( GENERATOR_MAKE "$(MAKE)" )
+if( CMAKE_MAKE_PROGRAM MATCHES "ninja$" )
+    message( "Ninja detected. Some projects compiled using add_custom_command like swig and QRenderDoc target will still be using make" )
+    set( GENERATOR_MAKE "make" )
+endif()
+
 # Compile our custom SWIG that will do scoped/strong enum classes
 ExternalProject_Add(custom_swig
     # using an URL to a zip directly so we don't clone the history etc
@@ -91,8 +97,8 @@ ExternalProject_Add(custom_swig
     BUILD_IN_SOURCE 1
     CONFIGURE_COMMAND ./autogen.sh > /dev/null 2>&1
     COMMAND CC=${SWIG_CONFIGURE_CC} CXX=${SWIG_CONFIGURE_CXX} CFLAGS=-fPIC CXXFLAGS=-fPIC ./configure --with-pcre=yes --prefix=${CMAKE_BINARY_DIR} > /dev/null
-    BUILD_COMMAND $(MAKE) > /dev/null 2>&1
-    INSTALL_COMMAND $(MAKE) install > /dev/null 2>&1)
+    BUILD_COMMAND ${GENERATOR_MAKE} > /dev/null 2>&1
+    INSTALL_COMMAND ${GENERATOR_MAKE} install > /dev/null 2>&1)
 
 # Lastly find PySide 2, optionally, for Qt5 Python bindings
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}")
@@ -235,7 +241,7 @@ if(ENABLE_QRENDERDOC)
 # can do dependency checking and rebuild anything necessary.
 add_custom_command(OUTPUT QRenderDoc
     COMMAND ${QMAKE_QT5_COMMAND} "CMAKE_DIR=${CMAKE_BINARY_DIR}" ${CMAKE_CURRENT_SOURCE_DIR}
-    COMMAND $(MAKE)
+    COMMAND ${GENERATOR_MAKE}
     DEPENDS RenderDoc.icns)
 add_custom_target(build-qrenderdoc ALL DEPENDS QRenderDoc DEPENDS renderdoc DEPENDS swig-bindings)