Disable unused-variable warning C4101 in MSVC

The C4101 warning for unused variable cannot be individually suppressed
with PG_USED_FOR_ASSERTS_ONLY, and thus cause false-positive warnings
for variables which are defined but only read/written in an assertion.
Until a satisfactory solution for per-variable suppression like how we
do for gcc and clang, disable the warning.

Discussion: https://postgr.es/m/CAJcOf-c+KniGAp31pn8TC=9a-WHXpkX-3+8-2BkaCsZchhu=8w@mail.gmail.com

diff --git a/src/tools/msvc/Project.pm b/src/tools/msvc/Project.pm
index aec922279df46b28aeec064d8600d6a5afe672c3..514003de11b14499947fbecb75dfc630479047c6 100644 (file)
--- a/src/tools/msvc/Project.pm
+++ b/src/tools/msvc/Project.pm
@@ -34,7 +34,7 @@ sub _new
        prefixincludes        => '',
        defines               => ';',
        solution              => $solution,
-       disablewarnings       => '4018;4244;4273;4102;4090;4267',
+       disablewarnings       => '4018;4244;4273;4101;4102;4090;4267',
        disablelinkerwarnings => '',
        platform              => $solution->{platform},
    };