贴一个我的SVN commit message...

from <getopt.h> in gnu c lib
{{{

struct option
{
  const char name;
  / has_arg can’t be an enum because some compilers complain about
     type mismatches in all the code that assumes it is an int.  /
  int has_arg;
  int *flag;
  int val;
};

/ Names for the values of the has_arg' field ofstruct option’.  */

# define no_argument        0

define required_argument  1

define optional_argument  2

#endif  /* need getopt */
}}}

Thank you, genius…
–This line, and those below, will be ignored–

起因其实很简单…我在程序里加入了很久以前libg++里提供的一个C++版的GetOpt实现，恰好这个实现里面的一些命名跟GNU C的getopt版本有些类似，然后就发现老是编译不通过……找原因，最后发现是一个第三方库间接包含了GNU C 库里的getopt.h，然后就发现了上面这一段…

不求甚解的库程序员真可怕…

解决方案：

$ svn diff


Index: GetOpt.cc

@@ -72,16 +72,16 @@
        o[k++] = p->val;

    switch( p->has_arg ) {



case GetOptLongOption::no_argument:
case GetOptLongOption::NO_ARGUMENT:
      {
        break;
      }
case GetOptLongOption::required_argument:
case GetOptLongOption::REQUIRED_ARGUMENT:
      {
        o[k++] = ‘:‘;
        break;
      }
case GetOptLongOption::optional_argument:
case GetOptLongOption::OPTIONAL_ARGUMENT:
      {
        o[k++] = ‘:‘;
        o[k++] = ‘:‘;
Index: GetOpt.h
===================================================================


@@ -35,7 +35,7 @@
 #ifdef GNUG
 #pragma interface
 #endif
-#define GetOpt_h
+#define GetOpt_h 1

/// Describe the long-named options requested by the application.
 //
@@ -57,13 +57,13 @@
   ///
   enum Arg {
     /// If the option does not take an argument,
-    no_argument,
+    NO_ARGUMENT,

 /// If the option requires an argument,



required_argument,

REQUIRED_ARGUMENT,

/// If the option takes an optional argument.

optional_argument,

OPTIONAL_ARGUMENT,
};


///

本文网址:http://blog.perlfect.me/2011/11/23/thank-you-genius-gnu-c-programmer.html