Consolidate the ubuntu detection logic a bit, add an entry for Ubuntu 12.04 aka precise pangolin.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149869 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 20 insertions, 28 deletions

diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index 48d798b990..15492774a5 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -1796,6 +1796,7 @@ enum LinuxDistro {
   UbuntuMaverick,
   UbuntuNatty,
   UbuntuOneiric,
+  UbuntuPrecise,
   UnknownDistro
 };
 
@@ -1816,10 +1817,7 @@ static bool IsDebian(enum LinuxDistro Distro) {
 }
 
 static bool IsUbuntu(enum LinuxDistro Distro) {
-  return Distro == UbuntuHardy  || Distro == UbuntuIntrepid ||
-         Distro == UbuntuLucid  || Distro == UbuntuMaverick ||
-         Distro == UbuntuJaunty || Distro == UbuntuKarmic ||
-         Distro == UbuntuNatty  || Distro == UbuntuOneiric;
+  return Distro >= UbuntuHardy && Distro <= UbuntuPrecise;
 }
 
 static LinuxDistro DetectLinuxDistro(llvm::Triple::ArchType Arch) {
@@ -1828,25 +1826,21 @@ static LinuxDistro DetectLinuxDistro(llvm::Triple::ArchType Arch) {
     StringRef Data = File.get()->getBuffer();
     SmallVector<StringRef, 8> Lines;
     Data.split(Lines, "\n");
-    for (unsigned int i = 0, s = Lines.size(); i < s; ++ i) {
-      if (Lines[i] == "DISTRIB_CODENAME=hardy")
-        return UbuntuHardy;
-      else if (Lines[i] == "DISTRIB_CODENAME=intrepid")
-        return UbuntuIntrepid;
-      else if (Lines[i] == "DISTRIB_CODENAME=jaunty")
-        return UbuntuJaunty;
-      else if (Lines[i] == "DISTRIB_CODENAME=karmic")
-        return UbuntuKarmic;
-      else if (Lines[i] == "DISTRIB_CODENAME=lucid")
-        return UbuntuLucid;
-      else if (Lines[i] == "DISTRIB_CODENAME=maverick")
-        return UbuntuMaverick;
-      else if (Lines[i] == "DISTRIB_CODENAME=natty")
-        return UbuntuNatty;
-      else if (Lines[i] == "DISTRIB_CODENAME=oneiric")
-        return UbuntuOneiric;
-    }
-    return UnknownDistro;
+    LinuxDistro Version = UnknownDistro;
+    for (unsigned i = 0, s = Lines.size(); i != s; ++i)
+      if (Version == UnknownDistro && Lines[i].startswith("DISTRIB_CODENAME="))
+        Version = llvm::StringSwitch<LinuxDistro>(Lines[i].substr(17))
+          .Case("hardy", UbuntuHardy)
+          .Case("intrepid", UbuntuIntrepid)
+          .Case("jaunty", UbuntuJaunty)
+          .Case("karmic", UbuntuKarmic)
+          .Case("lucid", UbuntuLucid)
+          .Case("maverick", UbuntuMaverick)
+          .Case("natty", UbuntuNatty)
+          .Case("oneiric", UbuntuOneiric)
+          .Case("precise", UbuntuPrecise)
+          .Default(UnknownDistro);
+    return Version;
   }
 
   if (!llvm::MemoryBuffer::getFile("/etc/redhat-release", File)) {
@@ -1983,8 +1977,8 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple)
   // ABI requires a mapping between the GOT and the symbol table.
   // Android loader does not support .gnu.hash.
   if (!IsMips && !IsAndroid) {
-    if (IsRedhat(Distro) || IsOpenSuse(Distro) || Distro == UbuntuMaverick ||
-        Distro == UbuntuNatty || Distro == UbuntuOneiric)
+    if (IsRedhat(Distro) || IsOpenSuse(Distro) ||
+        (IsUbuntu(Distro) && Distro >= UbuntuMaverick))
       ExtraOpts.push_back("--hash-style=gnu");
 
     if (IsDebian(Distro) || IsOpenSuse(Distro) || Distro == UbuntuLucid ||
@@ -1998,9 +1992,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple)
   if (Distro == DebianSqueeze || Distro == DebianWheezy ||
       IsOpenSuse(Distro) ||
       (IsRedhat(Distro) && Distro != RHEL4 && Distro != RHEL5) ||
-      Distro == UbuntuLucid ||
-      Distro == UbuntuMaverick || Distro == UbuntuKarmic ||
-      Distro == UbuntuNatty || Distro == UbuntuOneiric)
+      (IsUbuntu(Distro) && Distro >= UbuntuKarmic))
     ExtraOpts.push_back("--build-id");
 
   if (IsOpenSuse(Distro))