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dnl ### A macro to find the include directory, useful for cross-compiling.
AC_DEFUN([AC_INCLUDEDIR],
[AC_REQUIRE([AC_PROG_AWK])dnl
AC_SUBST(includedir)
AC_MSG_CHECKING(for primary include directory)
includedir=/usr/include
if test -n "$GCC"
then
>conftest.c
new_includedir=`
$CC -v -E conftest.c 2>&1 | $AWK '
/^End of search list/ { print last; exit }
{ last = [$]1 }
'
`
rm -f conftest.c
if test -n "$new_includedir" && test -d "$new_includedir"
then
includedir=$new_includedir
fi
fi
AC_MSG_RESULT($includedir)
])
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