Trying to build Tor 0.2.5.x with a cross-compiling toolchain and `./configure --host=arm-unknown-linux-gnueabihf`, the build process stops with the following error (followed by a number of warnings about bitshifts exceeding type width): ` CC src/ext/curve25519_donna/src_common_libcurve25519_donna_a-curve25519-donna-c64.o` `src/ext/curve25519_donna/curve25519-donna-c64.c:35:1: error: unable to emulate 'TI'` `typedef unsigned uint128_t attribute((mode(TI)));` curve25519-donna-c64.c is the curve25519 implementation for 64 bit platforms and shouldn't be built for arm. **Trac**: **Username**: sqrt2