From c7f3cd6a7023dec55c63b995ba50c9f5d4b9147a Mon Sep 17 00:00:00 2001
From: Wenzel Jakob <wenzel.jakob@epfl.ch>
Date: Tue, 15 Aug 2023 14:23:27 +0200
Subject: [PATCH] Isolate potentially ABI-compatible MSVC builds

See pybind11 issue https://github.com/pybind/pybind11/pull/4779
---
 src/nb_internals.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/nb_internals.cpp b/src/nb_internals.cpp
index 7e3d4ff4..0dbdc63b 100644
--- a/src/nb_internals.cpp
+++ b/src/nb_internals.cpp
@@ -56,8 +56,11 @@
 #endif
 
 /// On Linux/OSX, changes in __GXX_ABI_VERSION__ indicate ABI incompatibility.
+/// Also keep potentially ABI-incompatible visual studio builds apart.
 #if defined(__GXX_ABI_VERSION)
 #  define NB_BUILD_ABI "_cxxabi" NB_TOSTRING(__GXX_ABI_VERSION)
+#elif defined(_MSC_VER)
+#  define NB_BUILD_ABI "_mscver" NB_TOSTRING(_MSC_VER)
 #else
 #  define NB_BUILD_ABI ""
 #endif