On Fri, 8 Mar 2024 at 13:48, John Naylor <johncnaylo...@gmail.com> wrote:
> Now, after I get some coffee I'll look into the Windows failures.
I had a look at this and the attached fixes the broken build on MSVC for me.
I didn't take the time to fully understand it, but I did also try
PGDLLEXPORT and that *didn't* fix it. My guess is it's because these
are function pointer variables rather than functions.
git grep -E "PGDLLIMPORT.*\("
does not show anything else that does this for function pointers.
I did try commenting out "#define TRY_POPCNT_FAST 1" and the build still works.
That was the extent of my research.
David
diff --git a/src/include/port/pg_bitutils.h b/src/include/port/pg_bitutils.h
index 799f70d052..46bf4f0103 100644
--- a/src/include/port/pg_bitutils.h
+++ b/src/include/port/pg_bitutils.h
@@ -300,8 +300,8 @@ pg_ceil_log2_64(uint64 num)
#ifdef TRY_POPCNT_FAST
/* Attempt to use the POPCNT instruction, but perform a runtime check first */
-extern int (*pg_popcount32) (uint32 word);
-extern int (*pg_popcount64) (uint64 word);
+extern PGDLLIMPORT int (*pg_popcount32) (uint32 word);
+extern PGDLLIMPORT int (*pg_popcount64) (uint64 word);
#else
/* Use a portable implementation -- no need for a function pointer. */
