decomposer.cc: directly include required headers

[barvinok.git] / m4 / ax_unordered_map.m4

AC_DEFUN([AX_UNORDERED_MAP], [
        AC_LANG_SAVE
        AC_LANG_CPLUSPLUS
        AC_TRY_COMPILE([#include <unordered_map>], [using std::unordered_map;],
                AC_DEFINE([HAVE_UNORDERED_MAP], [],
                        [define if std::unordered_map is available]))
        AC_LANG_RESTORE
])