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164ac421d6
An early approach to codegen for `#_hasSymbol` relied on the Darwin platfom SDK, but now that the feature lowers directly to NULL checks in LLVM IR a platform restriction is no longer needed. However, the tests for `#_hasSymbol` remain unsupported on Windows since that OS does not support weak linking.
45 lines
1.5 KiB
Swift
45 lines
1.5 KiB
Swift
// RUN: %empty-directory(%t)
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// ---- (1) Build a simple library
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// RUN: echo "public func theAnswer() -> Int { 42 }" > %t/helper.swift
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// RUN: %target-build-swift-dylib(%t/%target-library-name(helper)) \
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// RUN: -emit-module-path %t/helper.swiftmodule \
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// RUN: -parse-as-library -enable-library-evolution \
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// RUN: %t/helper.swift
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// ---- (2) Build executable
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// RUN: %target-build-swift -emit-executable %s -g -o %t/test \
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// RUN: -I %t/ -L %t/ %target-rpath(%t/) -lhelper
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// RUN: %target-codesign %t/test
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// ---- (3) Run the executable
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// RUN: %target-run %t/test %t/%target-library-name(helper) | %FileCheck %s --check-prefix=HAS-ANSWER
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// ---- (4) Re-build the library with empty input
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// RUN: echo "" > %t/empty.swift
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// RUN: %target-build-swift-dylib(%t/%target-library-name(helper)) \
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// RUN: -emit-module-path %t/helper.swiftmodule \
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// RUN: -parse-as-library -enable-library-evolution \
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// RUN: %t/empty.swift
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// ---- (5) Run the executable
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// RUN: %target-run %t/test %t/%target-library-name(helper) | %FileCheck %s --check-prefix=NO-ANSWER
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// REQUIRES: executable_test
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// UNSUPPORTED: OS=windows-msvc
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// This test requires executable tests to be run on the same machine as the
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// compiler, as it links with a dylib that it doesn't arrange to get uploaded
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// to remote executors.
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// UNSUPPORTED: remote_run || device_run
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@_weakLinked import helper
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// HAS-ANSWER: 42
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// NO-ANSWER: No answer
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if #_hasSymbol(theAnswer) {
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print(theAnswer())
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} else {
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print("No answer")
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}
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