9dc9b21488
When the -fdirectives-only option is used together with -E, the preprocessor output reflects evaluation of if/then/else directives. Thus it preserves macros that are still live after such processing. This output can be consumed by a second compilation to produce a header unit. We automatically invoke this (with -E) when we know that the job produces a header unit so that the preprocessed output reflects the macros that will be defined when the binary HU is emitted. Differential Revision: https://reviews.llvm.org/D121591
21 lines
717 B
C++
21 lines
717 B
C++
// Test -fdirectives-only cases.
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// We can manullay specify fdirectives-only, for any pre-processor job.
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// RUN: %clang -### -std=c++20 -E -fdirectives-only foo.hh 2>&1 | \
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// RUN: FileCheck -check-prefix=CHECK-NON-HU %s
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// Check that we automatically append -fdirectives-only for header-unit
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// preprocessor jobs.
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// RUN: %clang -### -std=c++20 -E -fmodule-header=user foo.hh 2>&1 | \
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// RUN: FileCheck -check-prefix=CHECK-HU %s
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// CHECK-NON-HU: "-E"
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// CHECK-NON-HU-SAME: "-fdirectives-only"
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// CHECK-NON-HU-SAME: "-o" "-"
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// CHECK-NON-HU-SAME: "-x" "c++-header" "foo.hh"
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// CHECK-HU: "-E"
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// CHECK-HU-SAME: "-fdirectives-only"
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// CHECK-HU-SAME: "-o" "-"
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// CHECK-HU-SAME: "-x" "c++-user-header" "foo.hh"
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