Thread: pgsql: Suppress compiler warning in relptr_store().
Suppress compiler warning in relptr_store(). clang 13 with -Wextra warns that "performing pointer subtraction with a null pointer has undefined behavior" in the places where freepage.c tries to set a relptr variable to constant NULL. This appears to be a compiler bug, but it's unlikely to get fixed instantly. Fortunately, we can work around it by introducing an inline support function, which seems like a good change anyway because it removes the macro's existing double-evaluation hazard. Backpatch to v10 where this code was introduced. Patch by me, based on an idea of Andres Freund's. Discussion: https://postgr.es/m/48826.1648310694@sss.pgh.pa.us Branch ------ REL_13_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/4fbbea2c1934092581662553fd4be9e84630fc5c Modified Files -------------- src/include/utils/relptr.h | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-)