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https://github.com/c64scene-ar/llvm-6502.git
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65985348c5
On Windows, this improves clean cmake configuration time on my workstation from 1m58s to 1m32s, which is pretty significant. There's probably more that can be done here, but this is the low hanging fruit. Eric volunteered to regenerate ./configure for me. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187209 91177308-0d34-0410-b5e6-96231b3b80d8
76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
//===- Errno.cpp - errno support --------------------------------*- 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 implements the errno wrappers.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Errno.h"
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#include "llvm/Config/config.h" // Get autoconf configuration settings
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#include "llvm/Support/raw_ostream.h"
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#include <string.h>
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#if HAVE_ERRNO_H
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#include <errno.h>
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#endif
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only TRULY operating system
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//=== independent code.
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//===----------------------------------------------------------------------===//
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namespace llvm {
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namespace sys {
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#if HAVE_ERRNO_H
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std::string StrError() {
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return StrError(errno);
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}
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#endif // HAVE_ERRNO_H
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std::string StrError(int errnum) {
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const int MaxErrStrLen = 2000;
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char buffer[MaxErrStrLen];
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buffer[0] = '\0';
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std::string str;
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#ifdef HAVE_STRERROR_R
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// strerror_r is thread-safe.
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if (errnum)
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# if defined(__GLIBC__) && defined(_GNU_SOURCE)
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// glibc defines its own incompatible version of strerror_r
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// which may not use the buffer supplied.
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str = strerror_r(errnum,buffer,MaxErrStrLen-1);
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# else
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strerror_r(errnum,buffer,MaxErrStrLen-1);
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str = buffer;
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# endif
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#elif HAVE_DECL_STRERROR_S // "Windows Secure API"
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if (errnum) {
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strerror_s(buffer, MaxErrStrLen - 1, errnum);
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str = buffer;
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}
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#elif defined(HAVE_STRERROR)
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// Copy the thread un-safe result of strerror into
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// the buffer as fast as possible to minimize impact
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// of collision of strerror in multiple threads.
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if (errnum)
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str = strerror(errnum);
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#else
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// Strange that this system doesn't even have strerror
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// but, oh well, just use a generic message
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raw_string_ostream stream(str);
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stream << "Error #" << errnum;
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stream.flush();
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#endif
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return str;
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}
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} // namespace sys
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} // namespace llvm
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