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// RUN: %empty-directory(%t)
// RUN: %{python} %utils/split_file.py -o %t %s
// RUN: %target-swift-frontend -enable-experimental-feature Extern -emit-module -o %t/MyModule.swiftmodule %t/MyModule.swift -enable-experimental-feature Embedded -parse-as-library
// RUN: %target-swift-frontend -enable-experimental-feature Extern -c -I %t %t/Main.swift -enable-experimental-feature Embedded -o %t/a.o
// RUN: %target-clang -x c -c %S/Inputs/print.c -o %t/print.o
// RUN: %target-clang %t/a.o %t/print.o -o %t/a.out
// RUN: %target-run %t/a.out | %FileCheck %s
// REQUIRES: swift_in_compiler
// REQUIRES: executable_test
// REQUIRES: OS=macosx || OS=linux-gnu
// REQUIRES: swift_feature_Embedded
// REQUIRES: swift_feature_Extern
// BEGIN MyModule.swift
public var global_in_module_used_in_module = 0
public var global_in_module_unused_in_module = 0
public func foo() {
global_in_module_used_in_module += 1
}
// BEGIN Main.swift
import MyModule
@_extern(c, "putchar")
@discardableResult
func putchar(_: CInt) -> CInt
public func print(_ s: StaticString, terminator: StaticString = "\n") {
var p = s.utf8Start
while p.pointee != 0 {
putchar(CInt(p.pointee))
p += 1
}
p = terminator.utf8Start
while p.pointee != 0 {
putchar(CInt(p.pointee))
p += 1
}
}
@_silgen_name("print_long")
func print_long(_: Int)
public func print(_ n: Int, terminator: StaticString = "\n") {
print_long(n)
print("", terminator: terminator)
}
func test() {
print("Testing globals...") // CHECK: Testing globals...
print(global_in_module_used_in_module) // CHECK-NEXT: 0
print(global_in_module_unused_in_module) // CHECK-NEXT: 0
foo()
print(global_in_module_used_in_module) // CHECK-NEXT: 1
print(global_in_module_unused_in_module) // CHECK-NEXT: 0
}
test()
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