src/cf/linux-test1.m4

   1 # AC_TRY_KBUILD26([INCLUDES], [FUNCTION-BODY],
   2 #                 [ACTION-IF-SUCCESS], [ACTION-IF-FAILURE])
   3 #
   4 AC_DEFUN([AC_TRY_KBUILD26],[  rm -fr conftest.dir
   5   if test "x$ac_linux_kbuild_requires_extra_cflags" = "xyes" ; then
   6     CFLAGS_PREFIX='EXTRA_'
   7   fi
   8   if mkdir conftest.dir &&
   9     cat >conftest.dir/Makefile <<_ACEOF &&
  10 ${CFLAGS_PREFIX}CFLAGS += $CPPFLAGS
  11
  12 obj-m += conftest.o
  13 _ACEOF
  14     cat >conftest.dir/conftest.c <<\_ACEOF &&
  15 /* confdefs.h */
  16 _ACEOF
  17     cat confdefs.h >>conftest.dir/conftest.c &&
  18     cat >>conftest.dir/conftest.c <<\_ACEOF &&
  19 /* end confdefs.h */
  20 #include <linux/module.h>
  21 $1
  22
  23 void conftest(void)
  24 {
  25 $2
  26 }
  27
  28 MODULE_LICENSE("http://www.openafs.org/dl/license10.html");
  29 _ACEOF
  30     echo make -C $LINUX_KERNEL_BUILD M=$SRCDIR_PARENT/conftest.dir modules KBUILD_VERBOSE=1 >&AS_MESSAGE_LOG_FD &&
  31     make -C $LINUX_KERNEL_BUILD M=$SRCDIR_PARENT/conftest.dir modules KBUILD_VERBOSE=1 >&AS_MESSAGE_LOG_FD 2>conftest.err &&
  32     ! grep -i "WARNING: .* undefined!$" conftest.err >/dev/null 2>&1
  33     then [$3]
  34     else
  35       sed '/^ *+/d' conftest.err >&AS_MESSAGE_LOG_FD
  36       echo "$as_me: failed using Makefile:" >&AS_MESSAGE_LOG_FD
  37       sed 's/^/| /' conftest.dir/Makefile >&AS_MESSAGE_LOG_FD
  38       echo "$as_me: and program was:" >&AS_MESSAGE_LOG_FD
  39       sed 's/^/| /' conftest.dir/conftest.c >&AS_MESSAGE_LOG_FD
  40       [$4]
  41   fi; rm -fr conftest.err conftest.dir])
  42
  43
  44 # AC_TRY_KBUILD24([INCLUDES], [FUNCTION-BODY],
  45 #                 [ACTION-IF-SUCCESS], [ACTION-IF-FAILURE])
  46 #
  47 AC_DEFUN([AC_TRY_KBUILD24], [
  48   ac_save_CPPFLAGS="$CPPFLAGS"
  49   CPPFLAGS="-I$LINUX_KERNEL_PATH/include -D__KERNEL__ -Werror-implicit-function-declaration $CPPFLAGS"
  50   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  51 #include <linux/kernel.h>
  52 $1]], [[$2]])],[$3],[$4])
  53   CPPFLAGS="$ac_save_CPPFLAGS"])
  54
  55
  56 # AC_TRY_KBUILD([INCLUDES], [FUNCTION-BODY],
  57 #               [ACTION-IF-SUCCESS], [ACTION-IF-FAILURE])
  58 #
  59 AC_DEFUN([AC_TRY_KBUILD], [
  60   if test $AFS_SYSKVERS -ge 26 ; then
  61     AC_TRY_KBUILD26([$1], [$2], [$3], [$4])
  62   else
  63     AC_TRY_KBUILD24([$1], [$2], [$3], [$4])
  64   fi])
  65
  66 AC_DEFUN([LINUX_KERNEL_COMPILE_WORKS], [
  67   AC_MSG_CHECKING([if linux kernel module build works])
  68   AC_TRY_KBUILD(
  69 [#include <linux/sched.h>
  70 #include <linux/fs.h>],
  71     [],:,AC_MSG_RESULT(no)
  72     AC_MSG_FAILURE([Fix problem or use --disable-kernel-module...]))
  73   AC_MSG_RESULT(yes)])
  74
  75 AC_DEFUN([LINUX_KBUILD_USES_EXTRA_CFLAGS], [
  76   AC_MSG_CHECKING([if linux kbuild requires EXTRA_CFLAGS])
  77   save_CPPFLAGS="$CPPFLAGS"
  78   CPPFLAGS=-Wall
  79   AC_TRY_KBUILD(
  80 [#include <linux/sched.h>
  81 #include <linux/fs.h>],
  82     [],
  83     ac_linux_kbuild_requires_extra_cflags=no,
  84     ac_linux_kbuild_requires_extra_cflags=yes)
  85     CPPFLAGS="$save_CPPFLAGS"
  86     AC_MSG_RESULT($ac_linux_kbuild_requires_extra_cflags)])
  87
  88 dnl AC_CHECK_LINUX_BUILD([msg], [var], [includes], [code], [define], [CFLAGS])
  89 AC_DEFUN([AC_CHECK_LINUX_BUILD],
  90  [AS_VAR_PUSHDEF([ac_linux_build], [$2])dnl
  91   AC_CACHE_CHECK([$1], [ac_linux_build],
  92    [save_CPPFLAGS="$CPPFLAGS"
  93      CPPFLAGS="$CPPFLAGS $7"
  94      AC_TRY_KBUILD([$3], [$4],
  95                   AS_VAR_SET([ac_linux_build], [yes]),
  96                   AS_VAR_SET([ac_linux_build], [no]))
  97      CPPFLAGS="$save_CPPFLAGS"
  98    ])
  99   AS_IF([test AS_VAR_GET([ac_linux_build]) = yes],
 100         [AC_DEFINE([$5],1,[$6])])
 101  ])
 102
 103 dnl AC_CHECK_LINUX_HEADER(header)
 104 AC_DEFUN([AC_CHECK_LINUX_HEADER],
 105  [AC_CHECK_LINUX_BUILD([for linux/$1], [ac_cv_linux_header_$1],
 106                        [#include <linux/$1>],
 107                        [return;],
 108                        AS_TR_CPP(HAVE_LINUX_$1),
 109                        [Define if your kernel has linux/$1])
 110  ])
 111
 112 dnl AC_CHECK_LINUX_FUNC([function], [includes], [code])
 113 AC_DEFUN([AC_CHECK_LINUX_FUNC],
 114  [AS_VAR_PUSHDEF([ac_linux_func], [ac_cv_linux_func_$1])dnl
 115   AC_CACHE_CHECK([for $1], [ac_linux_func],
 116     [save_CPPFLAGS="$CPPFLAGS"
 117      CPPFLAGS="$CPPFLAGS -Werror-implicit-function-declaration"
 118      AC_TRY_KBUILD([$2], [$3],
 119                    AS_VAR_SET([ac_linux_func], [yes]),
 120                    AS_VAR_SET([ac_linux_func], [no]))
 121      CPPFLAGS="$save_CPPFLAGS"
 122     ])
 123   AS_IF([test AS_VAR_GET([ac_linux_func]) = yes],
 124         [AC_DEFINE(AS_TR_CPP(HAVE_LINUX_$1), 1,
 125                    [Define if your kernel has the $1 function])])
 126  ])
 127
 128 dnl AC_CHECK_LINUX_TYPE([type], [includes])
 129 AC_DEFUN([AC_CHECK_LINUX_TYPE],
 130  [AC_CHECK_LINUX_BUILD([for $1],
 131                        [ac_cv_linux_type_$1_exists],
 132                        [#include <linux/$2>],
 133                        [$1 _test; ],
 134                        AS_TR_CPP(HAVE_LINUX_$1),
 135                        [Define if kernel defines $1])
 136  ])
 137
 138 dnl AC_CHECK_LINUX_STRUCT([structure], [element], [includes])
 139 AC_DEFUN([AC_CHECK_LINUX_STRUCT],
 140  [AC_CHECK_LINUX_TYPED_STRUCT([struct $1], [$2], [$3])
 141  ])
 142
 143 dnl AC_CHECK_LINUX_TYPED_STRUCT([structure], [element], [includes])
 144 AC_DEFUN([AC_CHECK_LINUX_TYPED_STRUCT],
 145  [AC_CHECK_LINUX_BUILD([for $2 in $1],
 146                        [ac_cv_linux_$1_has_$2],
 147                        [#include <linux/$3>],
 148                        [$1 _test; printk("%x\n", &_test.$2); ],
 149                        AS_TR_CPP($1_HAS_$2),
 150                        [Define if kernel $1 has the $2 element])
 151  ])
 152
 153 dnl AC_CHECK_LINUX_OPERATION([structure], [operation], [label], [includes], [return_type], [args])
 154 AC_DEFUN([AC_CHECK_LINUX_OPERATION],
 155  [AS_VAR_PUSHDEF([ac_linux_operation], [ac_cv_linux_operation_$1_$2_$3])
 156   AC_CACHE_CHECK([operation $2 in $1], [ac_linux_operation],
 157     [save_CPPFLAGS="$CPPFLAGS"
 158      CPPFLAGS="$CPPFLAGS -Werror"
 159      AC_TRY_KBUILD([$4], [struct $1 ops; $5 op($6) { return ($5)0; }; ops.$2 = op;],
 160                    AS_VAR_SET([ac_linux_operation], [yes]),
 161                    AS_VAR_SET([ac_linux_operation], [no]))
 162      CPPFLAGS="$save_CPPFLAGS"
 163     ])
 164   AS_IF([test AS_VAR_GET([ac_linux_operation]) = yes],
 165         [AC_DEFINE(AS_TR_CPP(HAVE_LINUX_$1_$2_$3), 1,
 166                    [Define if $1 has $2 operation of form $6])])
 167  ])