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dnl AC_SINGLE_CXX_CHECK(CACHEVAR, FUNCTION, HEADER, PROGRAM)
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dnl $1, $2, $3, $4,
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dnl
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AC_DEFUN([AC_SINGLE_CXX_CHECK],
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[AC_CACHE_CHECK([for $2 in $3], [$1],
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[AC_LANG_PUSH([C++])
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AC_COMPILE_IFELSE(AC_LANG_PROGRAM([#include $3],[$4]),[$1=yes],[$1=no])
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AC_LANG_POP([C++])])
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])
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