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[C11] Diagnose C11 keywords as being incompatible w/earlier standards (…
…#82015) Our usual pattern when issuing an extension warning is to also issue a default-off diagnostic about the keywords not being compatible with standards before a certain point. This adds those diagnostics for C11 keywords.
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// RUN: %clang_cc1 %s -std=c11 -fsyntax-only -verify=compat -Wpre-c11-compat | ||
// RUN: %clang_cc1 %s -std=c99 -fsyntax-only -verify=ext -pedantic | ||
// RUN: %clang_cc1 %s -std=c11 -fsyntax-only -verify=good | ||
// RUN: %clang_cc1 -x c++ %s -fsyntax-only -verify=ext -pedantic | ||
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// good-no-diagnostics | ||
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extern _Noreturn void exit(int); /* compat-warning {{'_Noreturn' is incompatible with C standards before C11}} | ||
ext-warning {{'_Noreturn' is a C11 extension}} | ||
*/ | ||
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void func(void) { | ||
static _Thread_local int tl; /* compat-warning {{'_Thread_local' is incompatible with C standards before C11}} | ||
ext-warning {{'_Thread_local' is a C11 extension}} | ||
*/ | ||
_Alignas(8) char c; /* compat-warning {{'_Alignas' is incompatible with C standards before C11}} | ||
ext-warning {{'_Alignas' is a C11 extension}} | ||
*/ | ||
_Atomic int i1; /* compat-warning {{'_Atomic' is incompatible with C standards before C11}} | ||
ext-warning {{'_Atomic' is a C11 extension}} | ||
*/ | ||
_Atomic(int) i2; /* compat-warning {{'_Atomic' is incompatible with C standards before C11}} | ||
ext-warning {{'_Atomic' is a C11 extension}} | ||
*/ | ||
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_Static_assert(1, ""); /* compat-warning {{'_Static_assert' is incompatible with C standards before C11}} | ||
ext-warning {{'_Static_assert' is a C11 extension}} | ||
*/ | ||
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(void)_Generic(1, int : 1); /* compat-warning {{'_Generic' is incompatible with C standards before C11}} | ||
ext-warning {{'_Generic' is a C11 extension}} | ||
*/ | ||
(void)_Alignof(int); /* compat-warning {{'_Alignof' is incompatible with C standards before C11}} | ||
ext-warning {{'_Alignof' is a C11 extension}} | ||
*/ | ||
} | ||
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