From 57184dd74bdfe5fe32285d8df763fef1006e9ad6 Mon Sep 17 00:00:00 2001
From: Delyan Angelov <delian66@gmail.com>
Date: Tue, 26 Mar 2024 11:48:45 +0200
Subject: [PATCH] tests: test `@[c_extern]` for a C global variable as well
 (#21102)

---
 vlib/v/gen/c/testdata/translated/sym.c                |  4 ++++
 .../c/testdata/translated/translated_module_actual.v  | 11 +++++++++++
 vlib/v/gen/c/testdata/translated_module.c.must_have   |  1 +
 vlib/v/gen/c/testdata/translated_module.vv            |  1 +
 4 files changed, 17 insertions(+)

diff --git a/vlib/v/gen/c/testdata/translated/sym.c b/vlib/v/gen/c/testdata/translated/sym.c
index 8e6453170..7b76a0c83 100644
--- a/vlib/v/gen/c/testdata/translated/sym.c
+++ b/vlib/v/gen/c/testdata/translated/sym.c
@@ -1,3 +1,7 @@
+struct my_struct {
+       bool active;
+} my_instance = { true };
+
 int ExternalSymbol(char *hello) {
 	return *hello;
 }
diff --git a/vlib/v/gen/c/testdata/translated/translated_module_actual.v b/vlib/v/gen/c/testdata/translated/translated_module_actual.v
index d5103830e..dafbe060c 100644
--- a/vlib/v/gen/c/testdata/translated/translated_module_actual.v
+++ b/vlib/v/gen/c/testdata/translated/translated_module_actual.v
@@ -5,3 +5,14 @@ module translated
 
 @[c: 'ExternalSymbol']
 pub fn external_symbol(&char) int
+
+struct C.my_struct {
+	active bool
+}
+
+@[c_extern]
+__global my_instance C.my_struct
+
+pub fn is_my_instance_active() bool {
+	return my_instance.active
+}
diff --git a/vlib/v/gen/c/testdata/translated_module.c.must_have b/vlib/v/gen/c/testdata/translated_module.c.must_have
index 50396d4f5..94df23547 100644
--- a/vlib/v/gen/c/testdata/translated_module.c.must_have
+++ b/vlib/v/gen/c/testdata/translated_module.c.must_have
@@ -1,2 +1,3 @@
 int ExternalSymbol(char* );
 int a = ExternalSymbol("hello");
+extern  struct my_struct  my_instance;
diff --git a/vlib/v/gen/c/testdata/translated_module.vv b/vlib/v/gen/c/testdata/translated_module.vv
index ab234e247..1deb81ee6 100644
--- a/vlib/v/gen/c/testdata/translated_module.vv
+++ b/vlib/v/gen/c/testdata/translated_module.vv
@@ -6,4 +6,5 @@ fn main() {
 	a := external_symbol(c'hello')
 	println('result: ${a}')
 	assert a == 104
+	assert translated.is_my_instance_active() == true
 }
-- 
2.39.5