[LLVMbugs] [Bug 14696] New: Clang 3.2 Binaries for Ubuntu-12.04/x86 build 64-bit executables by default

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=14696

             Bug #: 14696
           Summary: Clang 3.2 Binaries for Ubuntu-12.04/x86 build 64-bit
                    executables by default
           Product: new-bugs
           Version: 3.2
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: nshutchinson at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


I'm having trouble with the Clang 3.2 binaries for Ubuntu 12.04/x86 from here:
http://llvm.org/releases/download.html#3.2. It looks like Clang is trying to
build for 64-bit even though I'm on a 32-bit system. Passing the -m32 flag
shouldn't be necessary, surely?

I'm running Ubuntu 12.04 32-bit.

    $ cat hello.c 
    #include <stdio.h>
    int main(int argc, const char *argv[]) {
        printf("hello world\n");
    }

    $ uname -i
    i386

    $ clang -v
    clang version 3.2 (tags/RELEASE_32/final)
    Target: x86_64-unknown-linux-gnu
    Thread model: posix

    $ file $(which clang)
    /usr/bin/clang: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV),
dynamically linked (uses shared libs), for GNU/Linux 2.6.24,
BuildID[sha1]=0xbf8f578631d2183e699186690101e0adbe579d58, stripped

    $ clang hello.c
    In file included from hello.c:1:
    In file included from /usr/include/stdio.h:28:
    /usr/include/features.h:324:10: fatal error: 'bits/predefs.h' file not
found
    #include <bits/predefs.h>
             ^
    1 error generated.

    $ clang -m32 hello.c   # no error

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