Try to detect runtime unavailability of __builtin_mul_overflow(int64). On some systems the results of 64 bit __builtin_mul_overflow() operations can be computed at compile time, but not at runtime. The known cases are arm buildfar animals using clang where the runtime operation is implemented in a unavailable function.
Try to avoid compile-time computation by using volatile arguments to __builtin_mul_overflow(). In that case we hopefully will get a link error when unavailable, similar to what buildfarm animals dangomushi and gull are reporting. Author: Andres Freund Discussion: https://postgr.es/m/[email protected] Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/c04d35f442a8c4fd5a20103b31839ec52fce3046 Modified Files -------------- config/c-compiler.m4 | 12 ++++++++---- configure | 4 +++- 2 files changed, 11 insertions(+), 5 deletions(-)
