From 4d83ca55b50ce1aa3370d5cd90d53849abca3e0b Mon Sep 17 00:00:00 2001
From: mattx <10520670+mattx433@users.noreply.github.com>
Date: Mon, 13 Nov 2023 13:35:27 +0100
Subject: [PATCH] inform user when wsl2 interop causes build issues

---
 Makefile | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Makefile b/Makefile
index be7ff06a3c3..35fb4b19fb7 100644
--- a/Makefile
+++ b/Makefile
@@ -73,6 +73,14 @@ MODE := $(m)
 endif
 endif
 
+# detect wsl2 running cosmopolitan binaries on the host by checking whether:
+# - user ran build/bootstrap/make.com, in which case make's working directory is in wsl
+# - user ran make, in which case cocmd.com's working directory is in wsl
+ifneq ($(findstring //wsl.localhost/,$(CURDIR) $(shell pwd)),)
+$(warning wsl2 interop is enabled)
+$(error you need to run sudo sh -c 'echo -1 > /proc/sys/fs/binfmt_misc/WSLInterop')
+endif
+
 UNAME_M = $(shell uname -m)
 UNAME_S = $(shell uname -s)