[LLVMbugs] [Bug 2579] New: `./configure` check for Carbon.h fails with CC=clang

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=2579

           Summary: `./configure` check for Carbon.h fails with CC=clang
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Semantic Analyzer
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: nicolasweber at gmx.de
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=1859)
 --> (http://llvm.org/bugs/attachment.cgi?id=1859)
Short testcase

When running `./configure` in a project that checks for Carbon.h, configure
tries to compile a program that contains `#include <Carbon/Carbon.h>` and a few
other includes. That program cannot be compiled with clang. A reduced test case
is attached.

This is probably related to #2427.

nico$ cat bla.c
# include <stdlib.h>
#include <Carbon/Carbon.h>
nico$ clang -fsyntax-only bla.c
In file included from bla.c:2:
In file included from
/System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:24:
In file included from
/System/Library/Frameworks/ApplicationServices.framework/Headers/ApplicationServices.h:30:
In file included from
/System/Library/Frameworks/ApplicationServices.framework/Frameworks/QD.framework/Headers/QD.h:25:
In file included from
/System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreGraphics.framework/Headers/CoreGraphics.h:14:
In file included from
/System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreGraphics.framework/Headers/CGBitmapContext.h:10:
In file included from
/System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreGraphics.framework/Headers/CGContext.h:13:
In file included from
/System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreGraphics.framework/Headers/CGColor.h:12:
In file included from
/System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreGraphics.framework/Headers/CGColorSpace.h:12:
In file included from
/System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreGraphics.framework/Headers/CGDataProvider.h:14:
/usr/include/unistd.h:582:7: error: conflicting types for 'valloc'
void    *valloc(size_t);                        
         ^
In file included from bla.c:1:
/usr/include/stdlib.h:312:7: error: previous declaration is here
void    *valloc(size_t);
         ^
2 diagnostics generated.


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