message: Attempt to fix weird SWIG compile error with lacking relocatable flag
  * Although we're only making binaries so this doesn't seem like it
  should be necessary.
diff: @@ -71,7 +71,7 @@ ExternalProject_Add(custom_swig
  URL ${RENDERDOC_SWIG_PACKAGE}
  BUILD_IN_SOURCE 1
  CONFIGURE_COMMAND ./autogen.sh > /dev/null 2>&1
  - COMMAND CC=${CMAKE_C_COMPILER} CXX=${CMAKE_CXX_COMPILER} ./configure --with-pcre=yes --prefix=${CMAKE_BINARY_DIR} > /dev/null
  + COMMAND CC=${CMAKE_C_COMPILER} CXX=${CMAKE_CXX_COMPILER} 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)
  