From: Peter Eisentraut <peter@eisentraut.org>
Date: Tue, 31 Mar 2026 06:38:24 +0000 (+0200)
Subject: Disable some C++ warnings in MSVC
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=82a7cbea747c465eee8449587be2d6cc47af82fe;p=thirdparty%2Fpostgresql.git

Disable some C++ warnings in MSVC

Flexible array members, as used in many PostgreSQL header files, are
not a C++ feature.  MSVC warns about these.  Disable the
warning.  (GCC and Clang accept them, but they would warn in -pedantic
mode.)

Reviewed-by: Jelte Fennema-Nio <postgres@jeltef.nl>
Discussion: https://www.postgresql.org/message-id/flat/CAGECzQR21OnnKiZO_1rLWO0-16kg1JBxnVq-wymYW0-_1cUNtg%40mail.gmail.com
---

diff --git a/meson.build b/meson.build
index cfd9cc2890d..c4b4cd4af06 100644
--- a/meson.build
+++ b/meson.build
@@ -2325,6 +2325,9 @@ if cc.get_id() == 'msvc'
   ]
 
   msvc_cxx_warning_flags = [
+    # Warnings to disable:
+    # from /W2:
+    '/wd4200', # nonstandard extension used: zero-sized array in struct/union [widely used in PostgreSQL C headers]
   ]
 
   cflags_warn += msvc_common_warning_flags