From ae56b3230b287eef5a5657d3089abebffde51484 Mon Sep 17 00:00:00 2001
From: laanwj <126646+laanwj@users.noreply.github.com>
Date: Tue, 1 Oct 2024 19:04:24 +0200
Subject: [PATCH] depends: For mingw cross compile use -gcc-posix to prevent
 library conflict

CMake parses some paths from the spec of the C compiler, assuming it
will be the linker, resulting in the link to end up with
`-L/usr/lib/gcc/x86_64-w64-mingw32/12-win32` on debian bookworm if both
-win32 and -posix variants are installed, and -win32 is the default
alternative.

This results in the wrong C++ library being linked, missing
std::threads::hardware_concurrency and other threading functions.

To fix this, use the -posix variant of gcc as well when available. This
fixes a regression compared to autotools, where this scenario worked.
---
 depends/hosts/mingw32.mk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/depends/hosts/mingw32.mk b/depends/hosts/mingw32.mk
index c09f7b1e3a8..755d7aebe4c 100644
--- a/depends/hosts/mingw32.mk
+++ b/depends/hosts/mingw32.mk
@@ -1,3 +1,6 @@
+ifneq ($(shell $(SHELL) $(.SHELLFLAGS) "command -v $(host)-gcc-posix"),)
+mingw32_CC := $(host)-gcc-posix
+endif
 ifneq ($(shell $(SHELL) $(.SHELLFLAGS) "command -v $(host)-g++-posix"),)
 mingw32_CXX := $(host)-g++-posix
 endif