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d50ced2a17
Currently, two of the Linux-related autoconf macros try to compile code
containing nested C functions (AC_CHECK_LINUX_OPERATION and
LINUX_KMEM_CACHE_CREATE_CTOR_TAKES_VOID). For example, the
AC_CHECK_LINUX_OPERATION check for 'follow_link' generates this code
where 'op' is a nested function inside 'conftest':
#include <linux/module.h>
#include <linux/fs.h>
void conftest(void)
{
struct inode_operations ops;
const char *op(struct dentry *dentry, void **link_date) {
return (const char *)0;
};
ops.follow_link = op;
}
Nested functions are a gcc-specific feature, and are not supported by
other compilers (e.g. clang), causing these checks to always fail when
using clang, leading to incorrect configure results.
To fix this, change AC_CHECK_LINUX_OPERATION and
LINUX_KMEM_CACHE_CREATE_CTOR_TAKES_VOID macros to just define the
relevant function as a proper top-level function.
(these were discovered by forcing a clang build of both the Linux kernel
and the openafs kernel module)
Reviewed-on: https://gerrit.openafs.org/14901
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
(cherry picked from commit a4878a5e26b9997e40a3b197cea5f8c3b24f2539)
Change-Id: Ie186658167a3f9e162fe85722aa0792cbe4fcfda
Reviewed-on: https://gerrit.openafs.org/15540
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Marcio Brito Barbosa <mbarbosa@sinenomine.net>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>
AFS is a distributed file system that enables users to share and access all of the files stored in a network of computers as easily as they access the files stored on their local machines. The file system is called distributed for this exact reason: files can reside on many different machines, but are available to users on every machine. OpenAFS 1.0 was originally released by IBM under the terms of the IBM Public License 1.0 (IPL10). For details on IPL10 see the LICENSE file in this directory. The current OpenAFS distribution is licensed under a combination of the IPL10 and many other licenses as granted by the relevant copyright holders. The LICENSE file in this directory contains more details, thought it is not a comprehensive statement. See INSTALL for information about building and installing OpenAFS on various platforms. See CODING for developer information and guidelines. See NEWS for recent changes to OpenAFS.