Move the Linux header searching from the Frontend to the Driver. This is

the first (and diff-noisiest) step to making Linux header searching
tremendously more principled and less brittle. Note that this step
should have essentially no functional impact. We still search the exact
same set of paths in the exact same order. The only change here is where
the code implementing such a search lives.

This has one obvious negative impact -- we now pass a ludicrous number
of flags to the CC1 layer. That should go away as I re-base this logic
on the logic to detect a GCC installation. I want to do this in two
phases so the bots can tell me if this step alone breaks something, and
so that the diffs of the refactoring make more sense.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@143822 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 274 deletions

diff --git a/lib/Frontend/InitHeaderSearch.cpp b/lib/Frontend/InitHeaderSearch.cpp
index decf345de4..051d5634b3 100644
--- a/lib/Frontend/InitHeaderSearch.cpp
+++ b/lib/Frontend/InitHeaderSearch.cpp
@@ -248,8 +248,9 @@ void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple,
   }
 
   switch (os) {
+  case llvm::Triple::Linux:
   case llvm::Triple::Win32:
-    llvm_unreachable("Windows include management is handled in the driver.");
+    llvm_unreachable("Include management is handled in the driver.");
 
   case llvm::Triple::Haiku:
     AddPath("/boot/common/include", System, true, false, false);
@@ -316,20 +317,6 @@ void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple,
     }
     break;
       
-  case llvm::Triple::Linux:
-    // Generic Debian multiarch support:
-    if (triple.getArch() == llvm::Triple::x86_64) {
-      AddPath("/usr/include/x86_64-linux-gnu", System, false, false, false);
-      AddPath("/usr/include/i686-linux-gnu/64", System, false, false, false);
-      AddPath("/usr/include/i486-linux-gnu/64", System, false, false, false);
-    } else if (triple.getArch() == llvm::Triple::x86) {
-      AddPath("/usr/include/x86_64-linux-gnu/32", System, false, false, false);
-      AddPath("/usr/include/i686-linux-gnu", System, false, false, false);
-      AddPath("/usr/include/i486-linux-gnu", System, false, false, false);
-      AddPath("/usr/include/i386-linux-gnu", System, false, false, false);
-    } else if (triple.getArch() == llvm::Triple::arm) {
-      AddPath("/usr/include/arm-linux-gnueabi", System, false, false, false);
-    }
   default:
     break;
   }
@@ -390,6 +377,10 @@ AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOp
   }
 
   switch (os) {
+  case llvm::Triple::Linux:
+  case llvm::Triple::Win32:
+    llvm_unreachable("Include management is handled in the driver.");
+
   case llvm::Triple::Cygwin:
     // Cygwin-1.7
     AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4");
@@ -417,265 +408,6 @@ AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOp
   case llvm::Triple::DragonFly:
     AddPath("/usr/include/c++/4.1", CXXSystem, true, false, false);
     break;
-  case llvm::Triple::Linux:
-    //===------------------------------------------------------------------===//
-    // Debian based distros.
-    // Note: these distros symlink /usr/include/c++/X.Y.Z -> X.Y
-    //===------------------------------------------------------------------===//
-
-    // Ubuntu 11.11 "Oneiric Ocelot" -- gcc-4.6.0
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6",
-                                "x86_64-linux-gnu", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6",
-                                "i686-linux-gnu", "", "64", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6",
-                                "i486-linux-gnu", "", "64", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6",
-                                "arm-linux-gnueabi", "", "", triple);
-
-    // Ubuntu 11.04 "Natty Narwhal" -- gcc-4.5.2
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.5",
-                                "x86_64-linux-gnu", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.5",
-                                "i686-linux-gnu", "", "64", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.5",
-                                "i486-linux-gnu", "", "64", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.5",
-                                "arm-linux-gnueabi", "", "", triple);
-
-    // Ubuntu 10.10 "Maverick Meerkat" -- gcc-4.4.5
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4",
-                                "i686-linux-gnu", "", "64", triple);
-    // The rest of 10.10 is the same as previous versions.
-
-    // Ubuntu 10.04 LTS "Lucid Lynx" -- gcc-4.4.3
-    // Ubuntu 9.10 "Karmic Koala"    -- gcc-4.4.1
-    // Debian 6.0 "squeeze"          -- gcc-4.4.2
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4",
-                                "x86_64-linux-gnu", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4",
-                                "i486-linux-gnu", "", "64", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4",
-                                "arm-linux-gnueabi", "", "", triple);
-    // Ubuntu 9.04 "Jaunty Jackalope" -- gcc-4.3.3
-    // Ubuntu 8.10 "Intrepid Ibex"    -- gcc-4.3.2
-    // Debian 5.0 "lenny"             -- gcc-4.3.2
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3",
-                                "x86_64-linux-gnu", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3",
-                                "i486-linux-gnu", "", "64", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3",
-                                "arm-linux-gnueabi", "", "", triple);
-    // Ubuntu 8.04.4 LTS "Hardy Heron"     -- gcc-4.2.4
-    // Ubuntu 8.04.[0-3] LTS "Hardy Heron" -- gcc-4.2.3
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2",
-                                "x86_64-linux-gnu", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2",
-                                "i486-linux-gnu", "", "64", triple);
-    // Ubuntu 7.10 "Gutsy Gibbon" -- gcc-4.1.3
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.1",
-                                "x86_64-linux-gnu", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.1",
-                                "i486-linux-gnu", "", "64", triple);
-
-    //===------------------------------------------------------------------===//
-    // Redhat based distros.
-    //===------------------------------------------------------------------===//
-    // Fedora 15 (GCC 4.6.1)
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6.1",
-                                "x86_64-redhat-linux", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6.1",
-                                "i686-redhat-linux", "", "", triple);
-    // Fedora 15 (GCC 4.6.0)
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6.0",
-                                "x86_64-redhat-linux", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6.0",
-                                "i686-redhat-linux", "", "", triple);
-    // Fedora 14
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.5.1",
-                                "x86_64-redhat-linux", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.5.1",
-                                "i686-redhat-linux", "", "", triple);
-    // RHEL5(gcc44)
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4.4",
-                                "x86_64-redhat-linux6E", "32", "", triple);
-    // Fedora 13
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4.4",
-                                "x86_64-redhat-linux", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4.4",
-                                "i686-redhat-linux","", "", triple);
-    // Fedora 12
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4.3",
-                                "x86_64-redhat-linux", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4.3",
-                                "i686-redhat-linux","", "", triple);
-    // Fedora 12 (pre-FEB-2010)
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4.2",
-                                "x86_64-redhat-linux", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4.2",
-                                "i686-redhat-linux","", "", triple);
-    // Fedora 11
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4.1",
-                                "x86_64-redhat-linux", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4.1",
-                                "i586-redhat-linux","", "", triple);
-    // Fedora 10
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3.2",
-                                "x86_64-redhat-linux", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3.2",
-                                "i386-redhat-linux","", "", triple);
-    // Fedora 9
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3.0",
-                                "x86_64-redhat-linux", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3.0",
-                                "i386-redhat-linux", "", "", triple);
-    // Fedora 8
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.1.2",
-                                "x86_64-redhat-linux", "", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.1.2",
-                                "i386-redhat-linux", "", "", triple);
-      
-    // RHEL 5
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.1.1",
-                                "x86_64-redhat-linux", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.1.1",
-                                "i386-redhat-linux", "", "", triple);
-
-
-    //===------------------------------------------------------------------===//
-
-    // Exherbo (2010-01-25)
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4.3",
-                                "x86_64-pc-linux-gnu", "32", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4.3",
-                                "i686-pc-linux-gnu", "", "", triple);
-
-    // openSUSE 11.1 32 bit
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3",
-                                "i586-suse-linux", "", "", triple);
-    // openSUSE 11.1 64 bit
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3",
-                                "x86_64-suse-linux", "32", "", triple);
-    // openSUSE 11.2
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4",
-                                "i586-suse-linux", "", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4",
-                                "x86_64-suse-linux", "", "", triple);
-
-    // openSUSE 11.4
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.5",
-                                "i586-suse-linux", "", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.5",
-                                "x86_64-suse-linux", "", "", triple);
-
-    // openSUSE 12.1
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6",
-                                "i586-suse-linux", "", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6",
-                                "x86_64-suse-linux", "", "", triple);
-    // Arch Linux 2008-06-24
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3.1",
-                                "i686-pc-linux-gnu", "", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3.1",
-                                "x86_64-unknown-linux-gnu", "", "", triple);
-
-    // Arch Linux gcc 4.6
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6.1",
-                                "i686-pc-linux-gnu", "", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6.1",
-                                "x86_64-unknown-linux-gnu", "", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6.0",
-                                "i686-pc-linux-gnu", "", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6.0",
-                                "x86_64-unknown-linux-gnu", "", "", triple);
-
-    // Slackware gcc 4.5.2 (13.37)
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.5.2",
-                                "i486-slackware-linux", "", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.5.2",
-                                "x86_64-slackware-linux", "", "", triple);
-    // Slackware gcc 4.5.3 (-current)
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.5.3",
-                                "i486-slackware-linux", "", "", triple);
-    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.5.3",
-                                "x86_64-slackware-linux", "", "", triple);
-
-    // Gentoo x86 gcc 4.5.3
-    AddGnuCPlusPlusIncludePaths(
-      "/usr/lib/gcc/i686-pc-linux-gnu/4.5.3/include/g++-v4",
-      "i686-pc-linux-gnu", "", "", triple);
-    // Gentoo x86 gcc 4.5.2
-    AddGnuCPlusPlusIncludePaths(
-      "/usr/lib/gcc/i686-pc-linux-gnu/4.5.2/include/g++-v4",
-      "i686-pc-linux-gnu", "", "", triple);
-    // Gentoo x86 gcc 4.4.5
-    AddGnuCPlusPlusIncludePaths(
-      "/usr/lib/gcc/i686-pc-linux-gnu/4.4.5/include/g++-v4",
-      "i686-pc-linux-gnu", "", "", triple);
-    // Gentoo x86 gcc 4.4.4
-    AddGnuCPlusPlusIncludePaths(
-      "/usr/lib/gcc/i686-pc-linux-gnu/4.4.4/include/g++-v4",
-      "i686-pc-linux-gnu", "", "", triple);
-   // Gentoo x86 2010.0 stable
-    AddGnuCPlusPlusIncludePaths(
-      "/usr/lib/gcc/i686-pc-linux-gnu/4.4.3/include/g++-v4",
-      "i686-pc-linux-gnu", "", "", triple);
-    // Gentoo x86 2009.1 stable
-    AddGnuCPlusPlusIncludePaths(
-      "/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4",
-      "i686-pc-linux-gnu", "", "", triple);
-    // Gentoo x86 2009.0 stable
-    AddGnuCPlusPlusIncludePaths(
-      "/usr/lib/gcc/i686-pc-linux-gnu/4.3.2/include/g++-v4",
-      "i686-pc-linux-gnu", "", "", triple);
-    // Gentoo x86 2008.0 stable
-    AddGnuCPlusPlusIncludePaths(
-      "/usr/lib/gcc/i686-pc-linux-gnu/4.1.2/include/g++-v4",
-      "i686-pc-linux-gnu", "", "", triple);
-    // Gentoo x86 llvm-gcc trunk
-    AddGnuCPlusPlusIncludePaths(
-        "/usr/lib/llvm-gcc-4.2-9999/include/c++/4.2.1",
-        "i686-pc-linux-gnu", "", "", triple);
-
-    // Gentoo amd64 gcc 4.5.3
-    AddGnuCPlusPlusIncludePaths(
-        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.3/include/g++-v4",
-        "x86_64-pc-linux-gnu", "32", "", triple);
-    // Gentoo amd64 gcc 4.5.2
-    AddGnuCPlusPlusIncludePaths(
-        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/include/g++-v4",
-        "x86_64-pc-linux-gnu", "32", "", triple);
-    // Gentoo amd64 gcc 4.4.5
-    AddGnuCPlusPlusIncludePaths(
-        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.5/include/g++-v4",
-        "x86_64-pc-linux-gnu", "32", "", triple);
-    // Gentoo amd64 gcc 4.4.4
-    AddGnuCPlusPlusIncludePaths(
-        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.4/include/g++-v4",
-        "x86_64-pc-linux-gnu", "32", "", triple);
-    // Gentoo amd64 gcc 4.4.3
-    AddGnuCPlusPlusIncludePaths(
-        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/include/g++-v4",
-        "x86_64-pc-linux-gnu", "32", "", triple);
-    // Gentoo amd64 gcc 4.3.4
-    AddGnuCPlusPlusIncludePaths(
-        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.3.4/include/g++-v4",
-        "x86_64-pc-linux-gnu", "", "", triple);
-    // Gentoo amd64 gcc 4.3.2
-    AddGnuCPlusPlusIncludePaths(
-        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.3.2/include/g++-v4",
-        "x86_64-pc-linux-gnu", "", "", triple);
-    // Gentoo amd64 stable
-    AddGnuCPlusPlusIncludePaths(
-        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.1.2/include/g++-v4",
-        "x86_64-pc-linux-gnu", "", "", triple);
-
-    // Gentoo amd64 llvm-gcc trunk
-    AddGnuCPlusPlusIncludePaths(
-        "/usr/lib/llvm-gcc-4.2-9999/include/c++/4.2.1",
-        "x86_64-pc-linux-gnu", "", "", triple);
-
-    break;
   case llvm::Triple::FreeBSD:
     // FreeBSD 8.0
     // FreeBSD 7.3
@@ -719,6 +451,7 @@ void InitHeaderSearch::AddDefaultIncludePaths(const LangOptions &Lang,
   default:
     break; // Everything else continues to use this routine's logic.
 
+  case llvm::Triple::Linux:
   case llvm::Triple::Win32:
     return;
   }