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thirdparty/breakpad/third_party/glog/m4/using_operator.m4

 

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AC_DEFUN([AC_CXX_USING_OPERATOR],

 

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  [AC_CACHE_CHECK(

 

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      whether compiler supports using ::operator<<,

 

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      ac_cv_cxx_using_operator,

 

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      [AC_LANG_SAVE

 

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       AC_LANG_CPLUSPLUS

 

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       AC_TRY_COMPILE([#include <iostream>

 

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                       std::ostream& operator<<(std::ostream&, struct s);],

 

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                      [using ::operator<<; return 0;],

 

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                      ac_cv_cxx_using_operator=1,

 

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                      ac_cv_cxx_using_operator=0)

 

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      AC_LANG_RESTORE])

 

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  if test "$ac_cv_cxx_using_operator" = 1; then

 

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    AC_DEFINE(HAVE_USING_OPERATOR, 1, [define if the compiler supports using expression for operator])

 

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  fi])

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