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Re: [tor-dev] MSVC compile failure



Gabriela Moldovan wrote:

Hi,

On Sat Mar 18, 2023 at 1:05 PM GMT, Gisle Vanem wrote:
Hello list. Anybody out there?

Trying to compile Tor with 'cl' ver. 19.36.32323 from
yesterdays 'git master', I got this error in
'src/feature/hs/hs_metrics_entry.c':

hs/hs_metrics_entry.c(98,3): error C2099: initializer is not a constant
    {
    ^
hs/hs_metrics_entry.c(106,3): error C2099: initializer is not a constant
    {
    ^

----------

This MSVC compiler is rather stupid; it fails to parse that
'static const size_t hs_metrics_circ_build_time_buckets_size'

is truly 'const'. No problem with 'clang-cl'.
But this patch works:

--- a/feature/hs/hs_metrics_entry.c 2023-03-17 18:00:57
+++ b/feature/hs/hs_metrics_entry.c 2023-03-18 13:56:58
@@ -28,8 +28,7 @@
     60000  /* 60s */
   };

-static const size_t hs_metrics_circ_build_time_buckets_size =
-  ARRAY_LENGTH(hs_metrics_circ_build_time_buckets);
+#define hs_metrics_circ_build_time_buckets_size ARRAY_LENGTH(hs_metrics_circ_build_time_buckets)

-----------------

Just letting you know here.

Ah, I think my changes from 1a60fa54 broke it.

While MSVC is not an officially supported build platform[1], if you want to
submit an MR for the fix, I'd be happy to review it. I would do it myself, but I
don't have an environment where I can test the proposed solution in.

[1]: https://gitlab.torproject.org/tpo/core/team/-/wikis/NetworkTeam/SupportedPlatforms

If MSVC is not among the supported compilers, it's a real pity.
It used to be. So why not anymore?

So I could not be bothered with a MR (whatever that is).
You mean PR?

--
--gv
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