9a92f2f742
In GCC, `#pragma GCC diagnostic warning "-Wfoo"` overrides command-line
`-Werror=foo` and errors that can become warnings (pedwarn with
-pedantic-errors and permerror).
```
#pragma GCC diagnostic warning "-Wnarrowing"
int x = {4.2};
#pragma GCC diagnostic warning "-Wundef"
#if FOO
#endif
// gcc -c -Werror=undef -Werror=narrowing => two warnings
```
These diagnostics are similar to our Warning/ExtWarn/Extension
diagnostics with DefaultError. This patch ports the behavior to Clang.
Fix #93474
Pull Request: https://github.com/llvm/llvm-project/pull/93647
50 lines
2.3 KiB
C++
50 lines
2.3 KiB
C++
// Check that implicit modules builds give correct diagnostics, even when
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// reusing a module built with strong -Werror flags.
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//
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// Clear the caches.
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// RUN: rm -rf %t.cache %t-pragma.cache
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//
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// Build with -Werror, then with -W, and then with neither.
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// RUN: not %clang_cc1 -triple x86_64-apple-darwin16 -fsyntax-only -fmodules \
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// RUN: -Werror=shorten-64-to-32 \
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// RUN: -I%S/Inputs/implicit-built-Werror-using-W -fimplicit-module-maps \
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// RUN: -fmodules-cache-path=%t.cache -x c++ %s 2>&1 \
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// RUN: | FileCheck %s -check-prefix=CHECK-ERROR
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// RUN: %clang_cc1 -triple x86_64-apple-darwin16 -fsyntax-only -fmodules \
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// RUN: -Wshorten-64-to-32 \
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// RUN: -I%S/Inputs/implicit-built-Werror-using-W -fimplicit-module-maps \
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// RUN: -fdisable-module-hash \
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// RUN: -fmodules-cache-path=%t.cache -x c++ %s 2>&1 \
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// RUN: | FileCheck %s -check-prefix=CHECK-WARN
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// RUN: %clang_cc1 -triple x86_64-apple-darwin16 -fsyntax-only -fmodules \
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// RUN: -I%S/Inputs/implicit-built-Werror-using-W -fimplicit-module-maps \
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// RUN: -fmodules-cache-path=%t.cache -x c++ %s 2>&1 \
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// RUN: | FileCheck %s -allow-empty
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//
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// In the presence of a warning pragma, build with -Werror and then without.
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// RUN: %clang_cc1 -triple x86_64-apple-darwin16 -fsyntax-only -fmodules \
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// RUN: -DUSE_PRAGMA=1 -Werror=shorten-64-to-32 \
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// RUN: -I%S/Inputs/implicit-built-Werror-using-W -fimplicit-module-maps \
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// RUN: -fmodules-cache-path=%t-pragma.cache -x c++ %s 2>&1 \
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// RUN: | FileCheck %s -check-prefix=CHECK-WARN
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// RUN: %clang_cc1 -triple x86_64-apple-darwin16 -fsyntax-only -fmodules \
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// RUN: -DUSE_PRAGMA=1 \
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// RUN: -I%S/Inputs/implicit-built-Werror-using-W -fimplicit-module-maps \
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// RUN: -fmodules-cache-path=%t-pragma.cache -x c++ %s 2>&1 \
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// RUN: | FileCheck %s -check-prefix=CHECK-WARN
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// Test an error pragma.
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// RUN: not %clang_cc1 -triple x86_64-apple-darwin16 -fsyntax-only -fmodules \
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// RUN: -DUSE_PRAGMA=2 -Wshorten-64-to-32 \
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// RUN: -I%S/Inputs/implicit-built-Werror-using-W -fimplicit-module-maps \
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// RUN: -fmodules-cache-path=%t-pragma.cache -x c++ %s 2>&1 \
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// RUN: | FileCheck %s -check-prefix=CHECK-ERROR
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#include <convert.h>
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long long foo() { return convert<long long>(0); }
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// CHECK-ERROR: error: implicit conversion
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// CHECK-WARN: warning: implicit conversion
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// CHECK-NOT: error: implicit conversion
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// CHECK-NOT: warning: implicit conversion
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