89a0c4066b
Summary: Add an `-Wundef-prefix=<arg1>,<arg2>...` option, which is similar to `-Wundef`, but only give warnings for undefined macros with the given prefixes. Reviewers: ributzka, steven_wu, cishida, bruno, arphaman, rsmith Reviewed By: ributzka, arphaman Subscribers: riccibruno, dexonsmith, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D80751 This patch was authored by Zixu Wang <zixu_wang@apple.com>
53 lines
2.1 KiB
C
53 lines
2.1 KiB
C
// RUN: %clang_cc1 %s -Eonly -Wundef -verify=undef
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// RUN: %clang_cc1 %s -Eonly -Wundef-prefix=A,BC -verify=undef-prefix
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// RUN: %clang_cc1 %s -Eonly -Wundef -Wundef-prefix=A,BC -verify=both
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// RUN: %clang_cc1 %s -Eonly -Werror=undef -verify=undef-error
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// RUN: %clang_cc1 %s -Eonly -Werror=undef-prefix -Wundef-prefix=A,BC -verify=undef-prefix-error
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// RUN: %clang_cc1 %s -Eonly -Werror=undef -Wundef-prefix=A,BC -verify=both-error
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extern int x;
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#if AB // #1
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#endif
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// undef-warning@#1 {{'AB' is not defined, evaluates to 0}}
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// undef-prefix-warning@#1 {{'AB' is not defined, evaluates to 0}}
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// both-warning@#1 {{'AB' is not defined, evaluates to 0}}
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// undef-error-error@#1 {{'AB' is not defined, evaluates to 0}}
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// undef-prefix-error-error@#1 {{'AB' is not defined, evaluates to 0}}
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// both-error-error@#1 {{'AB' is not defined, evaluates to 0}}
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#if B // #2
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#endif
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// undef-warning@#2 {{'B' is not defined, evaluates to 0}}
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// no warning for undef-prefix
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// both-warning@#2 {{'B' is not defined, evaluates to 0}}
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// undef-error-error@#2 {{'B' is not defined, evaluates to 0}}
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// no error for undef-prefix
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// both-error-error@#2 {{'B' is not defined, evaluates to 0}}
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#define BC 0
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#if BC // no warning/error
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#endif
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#undef BC
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#if BC // #3
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#endif
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// undef-warning@#3 {{'BC' is not defined, evaluates to 0}}
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// undef-prefix-warning@#3 {{'BC' is not defined, evaluates to 0}}
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// both-warning@#3 {{'BC' is not defined, evaluates to 0}}
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// undef-error-error@#3 {{'BC' is not defined, evaluates to 0}}
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// undef-prefix-error-error@#3 {{'BC' is not defined, evaluates to 0}}
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// both-error-error@#3 {{'BC' is not defined, evaluates to 0}}
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// Test that #pragma-enabled 'Wundef' can override 'Wundef-prefix'
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#pragma clang diagnostic error "-Wundef"
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#if C // #4
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#endif
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// undef-error@#4 {{'C' is not defined, evaluates to 0}}
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// undef-prefix-error@#4 {{'C' is not defined, evaluates to 0}}
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// both-error@#4 {{'C' is not defined, evaluates to 0}}
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// undef-error-error@#4 {{'C' is not defined, evaluates to 0}}
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// undef-prefix-error-error@#4 {{'C' is not defined, evaluates to 0}}
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// both-error-error@#4 {{'C' is not defined, evaluates to 0}}
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