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Re: Another issue with CLANG


Il 13/01/2013 15.31, Jon TURNEY ha scritto:
On 11/01/2013 12:54, Angelo Graziosi wrote:
An application which need to be built with clang++, fails to build when it
includes glx.h and indirectly windows.h headers like in the test case shown
below.

In short, X11/Xlib.h define Status as a macro (an alias for int) instead
rpcdce.h uses Status a a pointer variable name...

I don't think there's anything clang-specific about this problem. The same issue can be seen with gcc.

If your application needs both Xlib and Win32 interfaces, you should include
<X11/Xwindows.h> rather than <windows.h>, which wraps any conflicting
declarations.

(xcb uses a sensible namespace, so this is not necessary for applications
which use xcb and Win32.)

You probably need the latest upstream x11proto (not yet packaged for cygwin)
for this wrapping to work correctly with the mingw-w64 w32api headers [1]

Alternatively you can work around this yourself e.g. as in [2]


Thanks Jon, foo.cxx was anly a test case to reproduce the errors. In the true application those headers were included indirectly... :-(

In file included from input_line_87:1:
In file included from include/TX11GL.h:29:
In file included from /usr/include/GL/glx.h:45:
In file included from /usr/include/w32api/GL/gl.h:13:
In file included from /usr/include/w32api/windows.h:88:
In file included from /usr/include/w32api/rpc.h:70:
/usr/include/w32api/rpcdce.h:142:88: error: expected ')'
typedef void __RPC_API RPC_OBJECT_INQ_FN(UUID *ObjectUuid,UUID *TypeUuid,RPC_STATUS *Status);


                ^
/usr/include/X11/Xlib.h:87:16: note: expanded from macro 'Status'
#define Status int
               ^

Ciao,
 Angelo.


$ cat foo.cxx
#include <GL/glx.h>
#include <windows.h>


int foo() { return 0; }

$ clang++ -D_X86_=1 -c foo.cxx -o foo.o

[1] http://cgit.freedesktop.org/xorg/proto/xproto/commit/?id=c0dd615fddb6fa487d1a914c6928f3843489725e [2] http://cgit.freedesktop.org/~jturney/xserver/commit/?h=cygwin-patches-for-1.13&id=c493cd82c5b512efad284304f19349cc84a2c63d



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