Re: JIT on Windows with Postgres 12.1

On Wed, Feb 12, 2020 at 12:05:11PM -0800, Andres Freund wrote:
> Yes, LLVM would work on windows. I'd not even be surprised if one could
> make it work on windows already when using a mingw based build, instead
> of msvc.
In my mingw environment, postgresql build with option "--with-llvm"
failed with the follwing message. Is it difficult to make PostgreSQL
JIT work on windows using mingw?

--Message1
/mingw64/bin/clang -Wno-ignored-attributes -fno-strict-aliasing
-fwrapv -O2 -I../../../../src/include -I./src/include/port/win32
"-I../../../../src/include/port/win32" -DWIN32_STACK_RLIMIT=4194304
-DBUILDING_DLL -flto=thin -emit-llvm -c -o latch.bc latch.c
latch.c:680:19: error: static_assert expression is not an integral
constant expression
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--

--Message2(When commenting latch.c:680 out)
llvmjit_inline.cpp:32:10: fatal error: sys/mman.h: No such file or directory
32 | #include <sys/mman.h>
| ^~~~~~~~~~~~
compilation terminated.
--

--Environment
PostgreSQL:postgresql13.0
Windows:Windows10
MSYS2 packages:mingw-w64-x86_64-gcc base-devel
mingw-w64-x86_64-llvm(llvm11 installed) mingw-w64-x86_64-clang(clang11
installed)
--

--
Yuuki Fujii