6f29837659
Visual Studio has an argument to ignore all PCH related switches. clang-cl has also support option /Y-. Having the same option in clang would be helpful. This commit is to add support for ignoring PCH options (-ignore-pch). The commit includes: 1. Implement -ignore-pch as a Driver option. 2. Add a Driver test and a PCH test. 3. Add a section of -ignore-pch to user manual. 4. Add a release note for the new option '-ignore-pch'. The change since the original landing: 1. preprocessing-only mode doesn't imply that -include-pch is disabled. Co-authored-by: Matheus Izvekov <mizvekov@gmail.com>
20 lines
1015 B
C++
20 lines
1015 B
C++
// RUN: rm -rf %t
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// RUN: mkdir -p %t
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// Create PCH without -ignore-pch.
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// RUN: %clang -x c++-header %S/Inputs/pchfile.h -### 2>&1 | FileCheck %s -check-prefix=CHECK-EMIT-PCH
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// RUN: %clang -x c++-header %S/Inputs/pchfile.h -o %t/pchfile.h.pch
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// RUN: %clang %s -include-pch %t/pchfile.h.pch -### 2>&1 | FileCheck %s -check-prefix=CHECK-INCLUDE-PCH
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// RUN: %clang %s -emit-ast -include-pch %t/pchfile.h.pch -### 2>&1 | FileCheck %s -check-prefixes=CHECK-EMIT-PCH,CHECK-INCLUDE-PCH
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// Create PCH with -ignore-pch.
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// RUN: %clang -x c++-header -ignore-pch %S/Inputs/pchfile.h -### 2>&1 | FileCheck %s -check-prefix=CHECK-IGNORE-PCH
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// RUN: %clang %s -ignore-pch -include-pch %t/pchfile.h.pch -### 2>&1 | FileCheck %s -check-prefix=CHECK-IGNORE-PCH
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// RUN: %clang %s -ignore-pch -emit-ast -include-pch %t/pchfile.h.pch -### 2>&1 | FileCheck %s -check-prefix=CHECK-IGNORE-PCH
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// CHECK-EMIT-PCH: -emit-pch
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// CHECK-INCLUDE-PCH: -include-pch
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// CHECK-IGNORE-PCH-NOT: -emit-pch
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// CHECK-IGNORE-PCH-NOT: -include-pch
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