Error gcc4.9.1 compiling gcc-python-plugin

Hello, I do not know if this issue has been treated yet, as I don't know how to look for it efficiently in the mail archive. I tried to compile the gcc-python-plugin following the instruction given here: gcc-python-plugin.readthedocs.org I use gcc 4.9.1, which I compiled myself. When I compile with make plugin, errors appear when compiling gcc-callgraph.c: . . . python xml-to-h.py gcc -O2 -Werror -g -fPIC -fno-strict-aliasing -Wall -I[...]/lib/gcc/x86_64-unknown-linux-gnu/4.9.1/plugin/include -I[...]/lib/gcc/x86_64-unknown-linux-gnu/4.9.1/plugin/include/c-family -I. -c -x c++ -fno-rtti -o gcc-callgraph.o gcc-callgraph.c In file included from gcc-callgraph.c:29:0: [...]/lib/gcc/x86_64-unknown-linux-gnu/4.9.1/plugin/include/gimple.h:282:10: error: use of enum ‘internal_fn’ without previous declaration enum internal_fn GTY ((tag ("GF_CALL_INTERNAL"))) internal_fn; I have several other errors of the same kind after this one. Do you have any idea what has gone wrong ? I looked for it a bit, and I found enum internal_fn declaration in [...]/lib/gcc/x86_64-unknown-linux-gnu/4.9.1/plugin/include/internal-fn.h Hence I do not know why it can not find it. Sorry for bothering you, Best regards, Hugo Brunie