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126.96.36.199 (2001/07/26) C++_Support @ ac-archive-0.5.39
If the compiler accepts the old for scoping rules (the scope of a variable declared inside the parentheses extends outside the for-body), define HAVE_OLD_FOR_SCOPING. Note that some compilers (notably g++ and egcs) support both new and old rules since they accept the old rules and only generate a warning.
AC_DEFUN([AC_CXX_OLD_FOR_SCOPING], [AC_CACHE_CHECK(whether the compiler accepts the old for scoping rules, ac_cv_cxx_old_for_scoping, [AC_LANG_SAVE AC_LANG_CPLUSPLUS AC_TRY_COMPILE(,[int z;for (int i=0; i < 10; ++i)z=z+i;z=i;return z;], ac_cv_cxx_old_for_scoping=yes, ac_cv_cxx_old_for_scoping=no) AC_LANG_RESTORE ]) if test "$ac_cv_cxx_old_for_scoping" = yes; then AC_DEFINE(HAVE_OLD_FOR_SCOPING,,[define if the compiler accepts the old for scoping rules]) fi ])