Hi, when trying to compile pghashlib on an Apple M1 Silicon chip with the newer arm64 architecture, I get the following error:

clang -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -Wno-unused-command-line-argument -O2 -bundle -multiply_defined suppress -o hashlib.so src/pghashlib.o src/crc32.o src/lookup2.o src/lookup3.o src/inthash.o src/murmur3.o src/pgsql84.o src/city.o src/spooky.o src/md5.o src/siphash.o -L/usr/local/lib -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk -L/usr/local/opt/[email protected]/lib -L/usr/local/opt/readline/lib -Wl,-dead_strip_dylibs -bundle_loader /usr/local/Cellar/postgresql/13.4/bin/postgres ld: can't link with a main executable file '/usr/local/Cellar/postgresql/13.4/bin/postgres' for architecture arm64

Is there any workaround for this issue? Or could we update pghashlib to work on arm64 architecture?

This now fails to build against PostgreSQL 9.5, because a conflicting definition of uint128 has been added:

src/city.c:58:29: error: conflicting types for 'uint128'
 typedef struct city_uint128 uint128;
                             ^
In file included from .../include/server/postgres.h:47:0,
                 from src/pghashlib.h:4,
                 from src/city.c:48:
.../include/server/c.h:345:33: note: previous declaration of 'uint128' was here
 typedef unsigned PG_INT128_TYPE uint128;
                                 ^

Maybe typedef struct city_uint128 uint128 should be removed and city_uint128 used explicitly throughout?

$ make
…
src/siphash.c:19:10: fatal error: 'endian.h' file not found

include <endian.h>

     ^

1 error generated.
make: *** [src/siphash.o] Error 1
$ make distclean
…
$ git reset --hard 9cb0040
$ make

And it works

Postgres version 10.1 generates an error when trying to create extension library

ERROR: incompatible library "/usr/local/pgsql/lib/hashlib.so": version mismatch DETAIL: Server is version 11, library is version 10.