For pre-C99 compilers that do not support round(), we need to have a simplistic implementation for it, when it is not detected during build configuration, either via CMake or autotools, by using floor() and ceil(), which are provided in the pre-C99 compilers.
Please see discussion at commit 86a0ac2 for more details for re-adding this patch.
19256bef hb-private.hh: Add fallback implementation for round()
src/hb-private.hh | 13 +++++++++++++
1 file changed, 13 insertions(+)