From aec3d9857f09d75e697e13e052c30d168003414f Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Tue, 31 Mar 2009 17:30:15 +0000
Subject: [PATCH] Add llvm::sys::getHostTriple and remove
 llvm::sys::getOS{Name,Version}.

Right now the implementation just derives from LLVM_HOSTTRIPLE (which
is wrong, but it doesn't look like we have a define for the target
triple). Ideally this routine would actually be able to compute the
triple for targets we care about.

llvm-svn: 68118
---
 include/llvm/System/Host.h | 14 ++++++++------
 lib/System/Unix/Host.inc   | 36 ++++++++++++++++++++++++++----------
 lib/System/Win32/Host.inc  | 20 +++-----------------
 3 files changed, 37 insertions(+), 33 deletions(-)

diff --git a/include/llvm/System/Host.h b/include/llvm/System/Host.h
index 22e36e7ba7b..3c6aa9dd715 100644
--- a/include/llvm/System/Host.h
+++ b/include/llvm/System/Host.h
@@ -32,13 +32,15 @@ namespace sys {
     return !isLittleEndianHost();
   }
 
-  /// getOSName() - Return the name of the host operating system or "" if
-  /// unknown.
-  std::string getOSName();
+  /// getHostTriple() - Return the target triple of the running
+  /// system.
+  ///
+  /// The target triple is a string in the format of:
+  ///   CPU_TYPE-VENDOR-OPERATING_SYSTEM
+  /// or
+  ///   CPU_TYPE-VENDOR-KERNEL-OPERATING_SYSTEM
+  std::string getHostTriple();
 
-  /// getOSVersion() - Return the operating system version as a string or
-  /// "" if unknown.
-  std::string getOSVersion();
 }
 }
 
diff --git a/lib/System/Unix/Host.inc b/lib/System/Unix/Host.inc
index 1bd6da5632b..fb319fd09e1 100644
--- a/lib/System/Unix/Host.inc
+++ b/lib/System/Unix/Host.inc
@@ -23,16 +23,7 @@
 
 using namespace llvm;
 
-std::string llvm::sys::getOSName() {
-  struct utsname info;
-
-  if (uname(&info))
-    return "";
-
-  return info.sysname;
-}
-
-std::string llvm::sys::getOSVersion() {
+static std::string getOSVersion() {
   struct utsname info;
 
   if (uname(&info))
@@ -40,3 +31,28 @@ std::string llvm::sys::getOSVersion() {
 
   return info.release;
 }
+
+std::string sys::getHostTriple() {
+  // FIXME: Derive more directly instead of relying on the autoconf
+  // generated variable.
+
+  std::string Triple = LLVM_HOSTTRIPLE;
+
+  // Force i<N>86 to i386.
+  if (Triple[0] == 'i' && isdigit(Triple[1]) && 
+      Triple[2] == '8' && Triple[3] == '6')
+    Triple[1] = '3';
+
+  // On darwin, we want to update the version to match that of the
+  // host.    
+  std::string::size_type DarwinDashIdx = Triple.find("-darwin");
+  if (DarwinDashIdx != std::string::npos) {
+    Triple.resize(DarwinDashIdx + strlen("-darwin"));
+    
+    // Only add the major part of the os version.
+    std::string Version = getOSVersion();
+    Triple += Version.substr(0, Version.find('.'));
+  }
+
+  return Triple;
+}
diff --git a/lib/System/Win32/Host.inc b/lib/System/Win32/Host.inc
index 4fabc78adeb..18f00f8bc07 100644
--- a/lib/System/Win32/Host.inc
+++ b/lib/System/Win32/Host.inc
@@ -17,21 +17,7 @@
 
 using namespace llvm;
 
-std::string sys::getOSName() {
-  return "Windows";
-}
-
-std::string sys::getOSVersion() {
-  OSVERSIONINFO osvi;
-
-  memset(&osvi, 0, sizeof(osvi));
-  osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
-
-  if (!GetVersionEx(&osvi))
-    return "";
-
-  char buf[64];
-  sprintf(buf, "%d.%d", (int)osvi.dwMajorVersion, (int)osvi.dwMinorVersion);
-
-  return buf;
+std::string sys::getHostTriple() {
+  // FIXME: Adapt to running version.
+  return LLVM_HOSTTRIPLE;
 }