1 # AC_TRY_KBUILD26([INCLUDES], [FUNCTION-BODY],
2 # [ACTION-IF-SUCCESS], [ACTION-IF-FAILURE])
4 AC_DEFUN([AC_TRY_KBUILD26],[ rm -fr conftest.dir
5 if test "x$ac_linux_kbuild_requires_extra_cflags" = "xyes" ; then
8 if mkdir conftest.dir &&
9 cat >conftest.dir/Makefile <<_ACEOF &&
10 ${CFLAGS_PREFIX}CFLAGS += $CPPFLAGS
14 cat >conftest.dir/conftest.c <<\_ACEOF &&
17 cat confdefs.h >>conftest.dir/conftest.c &&
18 cat >>conftest.dir/conftest.c <<\_ACEOF &&
20 #include <linux/module.h>
28 MODULE_LICENSE("http://www.openafs.org/dl/license10.html");
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!$" conftest.err >/dev/null 2>&1
35 sed '/^ *+/d' conftest.err >&AS_MESSAGE_LOG_FD
36 echo "$as_me: failed using Makefile:" >&AS_MESSAGE_LOG_FD
37 sed 's/^/| /' conftest.dir/Makefile >&AS_MESSAGE_LOG_FD
38 echo "$as_me: and program was:" >&AS_MESSAGE_LOG_FD
39 sed 's/^/| /' conftest.dir/conftest.c >&AS_MESSAGE_LOG_FD
41 fi; rm -fr conftest.err conftest.dir])
44 # AC_TRY_KBUILD24([INCLUDES], [FUNCTION-BODY],
45 # [ACTION-IF-SUCCESS], [ACTION-IF-FAILURE])
47 AC_DEFUN([AC_TRY_KBUILD24], [
48 ac_save_CPPFLAGS="$CPPFLAGS"
49 CPPFLAGS="-I$LINUX_KERNEL_PATH/include -D__KERNEL__ -Werror-implicit-function-declaration $CPPFLAGS"
51 #include <linux/kernel.h>
52 $1], [$2], [$3], [$4])
53 CPPFLAGS="$ac_save_CPPFLAGS"])
56 # AC_TRY_KBUILD([INCLUDES], [FUNCTION-BODY],
57 # [ACTION-IF-SUCCESS], [ACTION-IF-FAILURE])
59 AC_DEFUN([AC_TRY_KBUILD], [
60 if test $AFS_SYSKVERS -ge 26 ; then
61 AC_TRY_KBUILD26([$1], [$2], [$3], [$4])
63 AC_TRY_KBUILD24([$1], [$2], [$3], [$4])
66 AC_DEFUN([LINUX_KERNEL_COMPILE_WORKS], [
67 AC_MSG_CHECKING([for linux kernel module build works])
69 [#include <linux/sched.h>
70 #include <linux/fs.h>],
71 [],:,AC_MSG_RESULT(no)
72 AC_MSG_FAILURE([Fix problem or use --disable-kernel-module...]))
75 AC_DEFUN([LINUX_KBUILD_USES_EXTRA_CFLAGS], [
76 AC_MSG_CHECKING([if linux kbuild requires EXTRA_CFLAGS])
77 save_CPPFLAGS="$CPPFLAGS"
80 [#include <linux/sched.h>
81 #include <linux/fs.h>],
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)])
88 dnl AC_CHECK_LINUX_HEADER(header)
89 AC_DEFUN([AC_CHECK_LINUX_HEADER],
90 [AS_VAR_PUSHDEF([ac_linux_header], [ac_cv_linux_header_$1])dnl
91 AC_CACHE_CHECK([for linux/$1], [ac_linux_header],
92 [AC_TRY_KBUILD([#include <linux/$1>],
94 AS_VAR_SET([ac_linux_header], [yes]),
95 AS_VAR_SET([ac_linux_header], [no]))
97 AS_IF([test AS_VAR_GET([ac_linux_header]) = yes],
98 [AC_DEFINE(AS_TR_CPP(HAVE_LINUX_$1),
100 [Define if your kernel has linux/$1])])
103 dnl AC_CHECK_LINUX_FUNC([function], [includes], [code])
104 AC_DEFUN([AC_CHECK_LINUX_FUNC],
105 [AS_VAR_PUSHDEF([ac_linux_func], [ac_cv_linux_func_$1])dnl
106 AC_CACHE_CHECK([for $1], [ac_linux_func],
107 [save_CPPFLAGS="$CPPFLAGS"
108 CPPFLAGS="$CPPFLAGS -Werror-implicit-function-declaration"
109 AC_TRY_KBUILD([$2], [$3],
110 AS_VAR_SET([ac_linux_func], [yes]),
111 AS_VAR_SET([ac_linux_func], [no]))
112 CPPFLAGS="$save_CPPFLAGS"
114 AS_IF([test AS_VAR_GET([ac_linux_func]) = yes],
115 [AC_DEFINE(AS_TR_CPP(HAVE_LINUX_$1), 1,
116 [Define if your kernel has the $1 function])])