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 $SPARSE_MAKEFLAGS modules KBUILD_VERBOSE=1 >&AS_MESSAGE_LOG_FD &&
31 make -C $LINUX_KERNEL_BUILD M=$SRCDIR_PARENT/conftest.dir $SPARSE_MAKEFLAGS modules KBUILD_VERBOSE=1 >&AS_MESSAGE_LOG_FD 2>conftest.err &&
32 ! grep -i "WARNING: .* undefined!$" 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"
50 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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], [$4])
66 AC_DEFUN([LINUX_KERNEL_COMPILE_WORKS], [
67 AC_MSG_CHECKING([if linux kernel module build works])
69 [#include <linux/sched.h>
70 #include <linux/fs.h>],
71 [],:,AC_MSG_RESULT(no)
72 AC_MSG_FAILURE([Fix problem or use --disable-kernel-module...]))
75 AC_DEFUN([LINUX_KBUILD_USES_EXTRA_CFLAGS], [
76 AC_MSG_CHECKING([if linux kbuild requires EXTRA_CFLAGS])
77 save_CPPFLAGS="$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 AC_DEFUN([LINUX_KBUILD_SPARSE_CHECKS], [
90 AS_HELP_STRING([--with-sparse@<:@=PATH@:>@],
91 [Location of the 'sparse' tool]),
96 [check], [AC_PATH_PROG([SPARSE], [sparse], [])],
97 [yes], [AC_PATH_PROG([SPARSE], [sparse], [])
98 AS_IF([test "x$SPARSE" = "x"], [AC_MSG_ERROR([sparse not found])])],
101 AS_IF([test x"$SPARSE" != x],
102 [SPARSE_MAKEFLAGS="C=2 CHECK=$SPARSE"])
104 AC_SUBST([SPARSE_MAKEFLAGS])
106 AC_ARG_VAR([SPARSE], [Path to the 'sparse' tool])
110 dnl AC_CHECK_LINUX_BUILD([msg], [var], [includes], [code], [define], [CFLAGS])
111 AC_DEFUN([AC_CHECK_LINUX_BUILD],
112 [AS_VAR_PUSHDEF([ac_linux_build], [$2])dnl
113 AC_CACHE_CHECK([$1], [ac_linux_build],
114 [save_CPPFLAGS="$CPPFLAGS"
115 CPPFLAGS="$CPPFLAGS $7"
116 AC_TRY_KBUILD([$3], [$4],
117 AS_VAR_SET([ac_linux_build], [yes]),
118 AS_VAR_SET([ac_linux_build], [no]))
119 CPPFLAGS="$save_CPPFLAGS"
121 AS_IF([test AS_VAR_GET([ac_linux_build]) = yes],
122 [AC_DEFINE([$5],1,[$6])])
125 dnl AC_CHECK_LINUX_HEADER(header)
126 AC_DEFUN([AC_CHECK_LINUX_HEADER],
127 [AC_CHECK_LINUX_BUILD([for linux/$1], [ac_cv_linux_header_$1],
128 [#include <linux/$1>],
130 AS_TR_CPP(HAVE_LINUX_$1),
131 [Define if your kernel has linux/$1])
134 dnl AC_CHECK_LINUX_FUNC([function], [includes], [code])
135 AC_DEFUN([AC_CHECK_LINUX_FUNC],
136 [AS_VAR_PUSHDEF([ac_linux_func], [ac_cv_linux_func_$1])dnl
137 AC_CACHE_CHECK([for $1], [ac_linux_func],
138 [save_CPPFLAGS="$CPPFLAGS"
139 CPPFLAGS="$CPPFLAGS -Werror-implicit-function-declaration"
140 AC_TRY_KBUILD([$2], [$3],
141 AS_VAR_SET([ac_linux_func], [yes]),
142 AS_VAR_SET([ac_linux_func], [no]))
143 CPPFLAGS="$save_CPPFLAGS"
145 AS_IF([test AS_VAR_GET([ac_linux_func]) = yes],
146 [AC_DEFINE(AS_TR_CPP(HAVE_LINUX_$1), 1,
147 [Define if your kernel has the $1 function])])
150 dnl AC_CHECK_LINUX_TYPE([type], [includes])
151 AC_DEFUN([AC_CHECK_LINUX_TYPE],
152 [AC_CHECK_LINUX_BUILD([for $1],
153 [ac_cv_linux_type_$1_exists],
154 [#include <linux/$2>],
156 AS_TR_CPP(HAVE_LINUX_$1),
157 [Define if kernel defines $1])
160 dnl AC_CHECK_LINUX_STRUCT([structure], [element], [includes])
161 AC_DEFUN([AC_CHECK_LINUX_STRUCT],
162 [AC_CHECK_LINUX_TYPED_STRUCT([struct $1], [$2], [$3])
165 dnl AC_CHECK_LINUX_TYPED_STRUCT([structure], [element], [includes])
166 AC_DEFUN([AC_CHECK_LINUX_TYPED_STRUCT],
167 [AC_CHECK_LINUX_BUILD([for $2 in $1],
168 [ac_cv_linux_$1_has_$2],
169 [#include <linux/$3>],
170 [$1 _test; printk("%x\n", &_test.$2); ],
171 AS_TR_CPP($1_HAS_$2),
172 [Define if kernel $1 has the $2 element])
175 dnl AC_CHECK_LINUX_OPERATION([structure], [operation], [label], [includes], [return_type], [args])
176 AC_DEFUN([AC_CHECK_LINUX_OPERATION],
177 [AS_VAR_PUSHDEF([ac_linux_operation], [ac_cv_linux_operation_$1_$2_$3])
178 AC_CACHE_CHECK([operation $2 in $1], [ac_linux_operation],
179 [save_CPPFLAGS="$CPPFLAGS"
180 CPPFLAGS="$CPPFLAGS -Werror"
181 AC_TRY_KBUILD([$4], [struct $1 ops; $5 op($6) { return ($5)0; }; ops.$2 = op;],
182 AS_VAR_SET([ac_linux_operation], [yes]),
183 AS_VAR_SET([ac_linux_operation], [no]))
184 CPPFLAGS="$save_CPPFLAGS"
186 AS_IF([test AS_VAR_GET([ac_linux_operation]) = yes],
187 [AC_DEFINE(AS_TR_CPP(HAVE_LINUX_$1_$2_$3), 1,
188 [Define if $1 has $2 operation of form $6])])