source/build/m4/check_make.m4

   1 dnl SMB Build Environment make Checks
   2 dnl -------------------------------------------------------
   3 dnl  Copyright (C) Stefan (metze) Metzmacher 2004
   4 dnl  Copyright (C) Jelmer Vernooij 2005
   5 dnl  Released under the GNU GPL
   6 dnl -------------------------------------------------------
   7 dnl
   8
   9 AC_PATH_PROG(MAKE,make)
  10
  11 AC_CACHE_CHECK([whether we have GNU make], samba_cv_gnu_make, [
  12 if $ac_cv_path_MAKE --version | head -1 | grep GNU 2>/dev/null >/dev/null
  13 then
  14         samba_cv_gnu_make=yes
  15 else
  16         samba_cv_gnu_make=no
  17 fi
  18 ])
  19
  20 GNU_MAKE=$samba_cv_gnu_make
  21 AC_SUBST(GNU_MAKE)
  22
  23 if test "x$GNU_MAKE" = x"yes"; then
  24         AC_CACHE_CHECK([GNU make version], samba_cv_gnu_make_version,[
  25                 samba_cv_gnu_make_version=`$ac_cv_path_MAKE --version | head -1 | cut -d " " -f 3 2>/dev/null`
  26         ])
  27         GNU_MAKE_VERSION=$samba_cv_gnu_make_version
  28         AC_SUBST(GNU_MAKE_VERSION)
  29 fi
  30
  31
  32 new_make=no
  33 AC_MSG_CHECKING([for GNU make >= 3.81])
  34 if test x$GNU_MAKE = x"yes"; then
  35         if $PERL -e " \$_ = '$GNU_MAKE_VERSION'; s/@<:@^\d\.@:>@.*//g; exit (\$_ < 3.81);"; then
  36                 new_make=yes
  37         fi
  38 fi
  39 AC_MSG_RESULT($new_make)
  40 automatic_dependencies=no
  41 AX_CFLAGS_GCC_OPTION([-M -MT conftest.d -MF conftest.o], [], [ automatic_dependencies=$new_make ], [])
  42 AC_MSG_CHECKING([Whether to use automatic dependencies])
  43 AC_ARG_ENABLE(automatic-dependencies,
  44 [  --enable-automatic-dependencies Enable automatic dependencies],
  45 [ automatic_dependencies=$enableval ],
  46 [ automatic_dependencies=no ])
  47 AC_MSG_RESULT($automatic_dependencies)
  48 AC_SUBST(automatic_dependencies)