m4/make.m4

   1 # AM_MAKE_INCLUDE()
   2 # -----------------
   3 # Check to see how make treats includes.
   4 AC_DEFUN([AM_MAKE_INCLUDE],
   5 [am_make=${MAKE-make}
   6 # BSD make uses .include
   7 cat > confinc << 'END'
   8 doit:
   9         @echo done
  10 END
  11 # If we don't find an include directive, just comment out the code.
  12 AC_MSG_CHECKING([for style of include used by $am_make])
  13 AMINCLUDE='#'
  14 for am_inc in include .include; do
  15    echo "$am_inc confinc" > confmf
  16    if test "`$am_make -f confmf 2> /dev/null`" = "done"; then
  17       AMINCLUDE=$am_inc
  18       break
  19    fi
  20 done
  21 AC_SUBST(AMINCLUDE)
  22 AC_MSG_RESULT($AMINCLUDE)
  23 rm -f confinc confmf
  24 ])