openssl: fix mingwW64 build (#455104)

pkgs/development/libraries/openssl/3.5/fix-mingw-linking.patch

@@ -0,0 +1,33 @@
+From af3a3f8205968f9e652efa7adf2a359f4eb9d9cc Mon Sep 17 00:00:00 2001
+From: Alexandr Nedvedicky <sashan@openssl.org>
+Date: Mon, 6 Oct 2025 09:33:09 +0200
+Subject: [PATCH] OPENSSL_SYS_WINDOWS is also enabled for mingw build
+
+the test_n() in bioprinttest.c must differentiate between
+MSVC runtime libc and ming runtime libc. The function
+_set_printf_count_output() must be called when openssl
+is linked with MSVC libc only.
+
+Fixes #28679
+
+Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
+Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
+Reviewed-by: Neil Horman <nhorman@openssl.org>
+(Merged from https://github.com/openssl/openssl/pull/28759)
+---
+ test/bioprinttest.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/test/bioprinttest.c b/test/bioprinttest.c
+index bd99b9820ecc0..28730631bc201 100644
+--- a/test/bioprinttest.c
++++ b/test/bioprinttest.c
+@@ -541,7 +541,7 @@ static int test_n(int i)
+         ptrdiff_t t;
+     } n = { 0 };
+ 
+-#if defined(OPENSSL_SYS_WINDOWS)
++#if defined(_set_printf_count_output)
+     /*
+      * MS CRT is special and throws an exception when %n is used even
+      * in non-*_s versions of printf routines, and there is a special function

pkgs/development/libraries/openssl/default.nix

@@ -422,6 +422,9 @@ in
         else
           ./3.5/use-etc-ssl-certs.patch
       )
+    ]
+    ++ lib.optionals stdenv.hostPlatform.isMinGW [
+      ./3.5/fix-mingw-linking.patch
     ];
 
     withDocs = true;