From aff3e683e274808c7344fdeae1acad6be8a21462 Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Tue, 14 Apr 2026 12:45:34 +0300
Subject: [PATCH] checker: Cross compiling for windows on Linux Mint, openssh
 issue (fixes #13978)

---
 vlib/v/checker/checker.v                      |  7 +--
 vlib/v/checker/pkgconfig_cross_compile_test.v | 43 +++++++++++++++++++
 2 files changed, 47 insertions(+), 3 deletions(-)
 create mode 100644 vlib/v/checker/pkgconfig_cross_compile_test.v

diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index 54bb11f12..aec42c2e4 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -4075,9 +4075,10 @@ fn (mut c Checker) hash_stmt(mut node ast.HashStmt) {
 			}
 		}
 		'pkgconfig' {
-			if c.pref.output_cross_c {
-				// do not add any flags, since we do not know what the target platform is for the cross platform builds
-				// and it is better to be as conservative as possible
+			if c.pref.output_cross_c || c.pref.os != pref.get_host_os() {
+				// Do not add host pkg-config flags to cross-target builds.
+				// They frequently inject include/library paths for the host OS
+				// (for example Linux OpenSSL headers when targeting Windows).
 				return
 			}
 			args := if node.main.contains('--') {
diff --git a/vlib/v/checker/pkgconfig_cross_compile_test.v b/vlib/v/checker/pkgconfig_cross_compile_test.v
new file mode 100644
index 000000000..58bb213bc
--- /dev/null
+++ b/vlib/v/checker/pkgconfig_cross_compile_test.v
@@ -0,0 +1,43 @@
+module checker
+
+import os
+import v.ast
+import v.parser
+import v.pref
+
+const pkgconfig_test_source = 'module main
+#pkgconfig --cflags --libs sdl2
+
+fn main() {}
+'
+
+fn test_pkgconfig_is_skipped_for_cross_compilation() {
+	sample_dir := os.join_path(@VEXEROOT, 'vlib', 'v', 'pkgconfig', 'test_samples')
+	old_path := os.getenv('PKG_CONFIG_PATH')
+	old_defaults := os.getenv('PKG_CONFIG_PATH_DEFAULTS')
+	defer {
+		os.setenv('PKG_CONFIG_PATH', old_path, true)
+		os.setenv('PKG_CONFIG_PATH_DEFAULTS', old_defaults, true)
+	}
+	os.setenv('PKG_CONFIG_PATH', sample_dir, true)
+	os.setenv('PKG_CONFIG_PATH_DEFAULTS', '', true)
+
+	native_flags := checked_pkgconfig_flags(pref.get_host_os())
+	assert native_flags.any(it == '-lSDL2')
+	assert native_flags.any(it.starts_with('-I') && it.contains('SDL2'))
+
+	cross_target := if pref.get_host_os() == .windows { pref.OS.linux } else { pref.OS.windows }
+	cross_flags := checked_pkgconfig_flags(cross_target)
+	assert cross_flags.len == 0
+}
+
+fn checked_pkgconfig_flags(target_os pref.OS) []string {
+	mut table := ast.new_table()
+	mut pref_ := pref.new_preferences()
+	pref_.os = target_os
+	mut file := parser.parse_text(pkgconfig_test_source, os.join_path('/virtual', 'main.v'), mut
+		table, .skip_comments, pref_)
+	mut chk := new_checker(table, pref_)
+	chk.check(mut file)
+	return table.cflags.map(it.format() or { '' }).filter(it != '')
+}
-- 
2.39.5