30 lines
1.3 KiB
C
30 lines
1.3 KiB
C
// RUN: %clang_cc1 -fsyntax-only -verify %s -Wunused-function
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/// We allow 'retain' on non-ELF targets because 'retain' is often used together
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/// with 'used'. 'used' has GC root semantics on macOS and Windows. We want
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/// users to just write retain,used and don't need to dispatch on binary formats.
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extern char test1[] __attribute__((retain)); // expected-warning {{'retain' attribute ignored on a non-definition declaration}}
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extern const char test2[] __attribute__((retain)); // expected-warning {{'retain' attribute ignored on a non-definition declaration}}
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const char test3[] __attribute__((retain)) = "";
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struct __attribute__((retain)) s { // expected-warning {{'retain' attribute only applies to variables with non-local storage, functions, and Objective-C methods}}
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};
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void foo() {
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static int a __attribute__((retain));
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int b __attribute__((retain)); // expected-warning {{'retain' attribute only applies to variables with non-local storage, functions, and Objective-C methods}}
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(void)a;
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(void)b;
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}
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__attribute__((retain,used)) static void f0() {}
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__attribute__((retain)) static void f1() {} // expected-warning {{unused function 'f1'}}
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__attribute__((retain)) void f2() {}
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/// Test attribute merging.
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int tentative;
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int tentative __attribute__((retain));
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extern int tentative;
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int tentative = 0;
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