4031e4b95d
Summary: Adds a CMake check for whether the compiler used to build the XRay library supports XRay-instrumentation. If the compiler we're using does support the `-fxray-instrument` flag (i.e. recently-built Clang), we define the XRAY_NEVER_INSTRUMENT macro that then makes sure that the XRay runtime functions never get XRay-instrumented. This prevents potential weirdness involved with building the XRay library with a Clang that supports XRay-instrumentation, and is attempting to XRay-instrument the build of compiler-rt. Reviewers: majnemer, rSerge, echristo Subscribers: mehdi_amini, llvm-commits, mgorny Differential Revision: https://reviews.llvm.org/D26597 llvm-svn: 287068
23 lines
686 B
C++
23 lines
686 B
C++
//===-- xray_defs.h ---------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Common definitions useful for XRay sources.
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//
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//===----------------------------------------------------------------------===//
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#ifndef XRAY_XRAY_DEFS_H
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#define XRAY_XRAY_DEFS_H
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#if XRAY_SUPPORTED
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#define XRAY_NEVER_INSTRUMENT __attribute__((xray_never_instrument))
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#else
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#define XRAY_NEVER_INSTRUMENT
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#endif
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#endif // XRAY_XRAY_DEFS_H
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