_GL_WARN_ON_USE_CXX  258 build-aux/snippet/c++defs.h     _GL_WARN_ON_USE_CXX (func, rettype, parameters_and_attributes, \
_GL_WARN_ON_USE_CXX   88 build-aux/snippet/warn-on-use.h #ifndef _GL_WARN_ON_USE_CXX