1 dnl ### A macro to find the include directory, useful for cross-compiling. 2 AC_DEFUN([AC_INCLUDEDIR], 3 [AC_REQUIRE([AC_PROG_AWK])dnl 4 AC_SUBST(includedir) 5 AC_MSG_CHECKING(for primary include directory) 6 includedir=/usr/include 7 if test -n "$GCC" 8 then 9 >conftest.c 10 new_includedir=` 11 $CC -v -E conftest.c 2>&1 | $AWK ' 12 /^End of search list/ { print last; exit } 13 { last = [$]1 } 14 ' 15 ` 16 rm -f conftest.c 17 if test -n "$new_includedir" && test -d "$new_includedir" 18 then 19 includedir=$new_includedir 20 fi 21 fi 22 AC_MSG_RESULT($includedir) 23 ]) 24
