forked from OSchip/llvm-project
64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
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//===- Version.cpp - Clang Version Number -----------------------*- 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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// This file defines several version-related utility functions for Clang.
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//
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//===----------------------------------------------------------------------===//
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#include <cstring>
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#include <cstdlib>
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using namespace std;
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namespace clang {
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const char *getClangSubversionPath() {
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static const char *Path = 0;
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if (Path)
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return Path;
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static char URL[] = "$URL$";
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char *End = strstr(URL, "/lib/Basic");
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if (End)
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*End = 0;
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char *Begin = strstr(URL, "cfe/");
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if (Begin) {
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Path = Begin + 4;
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return Path;
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}
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Path = URL;
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return Path;
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}
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unsigned getClangSubversionRevision() {
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#ifndef SVN_REVISION
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return 0;
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#else
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// What follows is an evil trick. We can end up getting three different
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// kinds of results when asking for the Subversion information:
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// - if SVN_REVISION is a number, we return that number (adding 0 to it is
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// harmless).
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// - if SVN_REVISION is "exported" (for an tree without any Subversion
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// info), we end up referencing the local variable "exported" and adding
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// zero to it, and we return 0.
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// - if SVN_REVISION is empty (because "svn info" returned no results),
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// the "+" turns into a unary "+" operator and we return 0.
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//
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// Making this less ugly requires doing more computation in the CMake- and
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// Makefile-based build systems, with all sorts of checking to make sure we
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// don't end up breaking this build. It's better this way. Really.
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const unsigned exported = 0;
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(void)exported;
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return SVN_REVISION + 0;
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#endif
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}
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} // end namespace clang
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