[Bug 29822] New: winebuild should use Clang to assemble if Clang is used to compile

wine-bugs at winehq.org wine-bugs at winehq.org
Mon Feb 6 19:53:00 CST 2012


             Bug #: 29822
           Summary: winebuild should use Clang to assemble if Clang is
                    used to compile
           Product: Wine
           Version: 1.4-rc2
          Platform: x86
        OS/Version: Mac OS X
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: build-env
        AssignedTo: wine-bugs at winehq.org
        ReportedBy: camillo.lugaresi+wine at gmail.com
    Classification: Unclassified

Trying to build Wine on Mac OS X 10.7 using Clang 3.0, winebuild generates
several errors like "acledit.CPpFo1.s:83:Unknown pseudo-op: .cfi_startproc".
The problem is that Clang supports CFI, but the version of GNU as shipped with
OS X does not. When configure checks for CFI support, it uses Clang, and marks
it as supported; this means that, later on, -fasynchronous-unwind-tables is
passed to winegcc and then to winebuild, which generates the CFI lines and
tries to assemble using /usr/bin/as, which rejects them.

The problem can be solved by using "clang -c" as an assembler instead of "as"
when the C compiler in use is Clang and not GCC. I verified that this fix works
using a quick and dirty patch to winebuild, but it needs to be properly

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