fixincludes: vxworks: remove unnecessary parentheses in ioctl wrapper macro

The rationale for the fixinclude ioctl macro wrapper is, as far as I can
tell (https://gcc.gnu.org/ml/gcc-patches/2012-09/msg01619.html)

  Fix 2: Add hack for ioctl() on VxWorks.

  ioctl() is supposed to be variadic, but VxWorks only has a three
  argument version with the third argument of type int.  This messes up
  when the third argument is not implicitly convertible to int.  This
  adds a macro which wraps around ioctl() and explicitly casts the third
  argument to an int.  This way, the most common use case of ioctl (with
  a const char * for the third argument) will compile in C++, where
  pointers must be explicitly casted to int.

However, we have existing C++ code that calls the ioctl function via

  ::ioctl(foo, bar, baz)

and obviously this breaks when it gets expanded to

  ::(ioctl)(foo, bar, (int)(baz))

Since the GNU C preprocessor already prevents recursive expansion of
function-like macros, the parentheses around ioctl are unnecessary.

Incidentally, there is also a macro sioIoctl() in the vxworks sioLib.h
header that expands to

  ((pSioChan)->pDrvFuncs->ioctl (pSioChan, cmd, arg))

which also breaks when that gets further expanded to

  ((pSioChan)->pDrvFuncs->(ioctl) (pSioChan, cmd, (int)(arg)))

This patch partly fixes that issue as well, but the third argument to
the pDrvFuncs->ioctl method should be void*, so the cast to (int) is
slightly annoying. Internally, we've simply patched the sioIoctl macro:

  (((pSioChan)->pDrvFuncs->ioctl) (pSioChan, cmd, arg))

From-SVN: r264056

1 files changed, 1 insertions, 1 deletions

diff --git a/fixincludes/inclhack.def b/fixincludes/inclhack.def
index 4ce8b16..f9ba977 100644
--- a/fixincludes/inclhack.def
+++ b/fixincludes/inclhack.def
@@ -4916,7 +4916,7 @@ fix = {
 
     c_fix       = format;
     c_fix_arg   = "%0\n"
-        "#define ioctl(fd, func, arg) (ioctl)(fd, func, (int)(arg))\n";
+        "#define ioctl(fd, func, arg) ioctl(fd, func, (int)(arg))\n";
     c_fix_arg   = "extern[\t ]+int[\t ]+ioctl[\t ]*\\([\t ,[:alnum:]]*\\);";
         
     test_text   = "extern int ioctl ( int asdf1234, int jkl , int qwerty ) ;";