AsmWriter.cpp:255: error: ambiguous overload for `std::basic_ostream<char,...

Here is an excerpt from the config.log:

configure:19451: checking for int64_t
configure:19476: gcc -c -g -O2 conftest.c >&5
configure:19479: $? = 0
configure:19482: test -s conftest.o
configure:19485: $? = 0
configure:19496: result: yes
configure:19511: checking for uint64_t
configure:19536: gcc -c -g -O2 conftest.c >&5
configure:19539: $? = 0
configure:19542: test -s conftest.o
configure:19545: $? = 0
configure:19556: result: yes

All seems to be fine...