Re: [libvirt] [PATCH] build: avoid compile failure on linux kernels older than 2.6.19

On Mon, May 17, 2010 at 04:25:43PM +0200, Jim Meyering wrote: > This is required for any kernel prior to 2.6.19, > since <linux/magic.h> didn't exist back then. > Now that file is provided by the kernel-headers package. > > >From d14ef1669968ffeb65076b007e318934ed99aa61 Mon Sep 17 00:00:00 2001 > From: Jim Meyering <meyering(a)redhat.com&gt; > Date: Mon, 17 May 2010 16:17:08 +0200 > Subject: [PATCH] build: avoid compile failure on linux kernels older than 2.6.19 > > * configure.ac: Check for <linux/magic.h>. > * src/util/storage_file.c: Include <linux/magic.h> only if present. > Linux kernels prior to 2.6.19 lacked it. > [__linux__] (NFS_SUPER_MAGIC): Define if not already defined. > --- > configure.ac | 2 +- > src/util/storage_file.c | 7 ++++++- > 2 files changed, 7 insertions(+), 2 deletions(-) > > diff --git a/configure.ac b/configure.ac > index c187420..ebd2082 100644 > --- a/configure.ac > +++ b/configure.ac > @@ -108,7 +108,7 @@ LIBS=$old_libs > > dnl Availability of various common headers (non-fatal if missing). > AC_CHECK_HEADERS([pwd.h paths.h regex.h sys/syslimits.h \ > - termios.h sys/poll.h syslog.h mntent.h net/ethernet.h]) > + termios.h sys/poll.h syslog.h mntent.h net/ethernet.h linux/magic.h]) > > dnl Where are the XDR functions? > dnl If portablexdr is installed, prefer that. > diff --git a/src/util/storage_file.c b/src/util/storage_file.c > index 5f15a64..a07bedc 100644 > --- a/src/util/storage_file.c > +++ b/src/util/storage_file.c > @@ -27,7 +27,9 @@ > #include <unistd.h> > #include <fcntl.h> > #ifdef __linux__ > -# include <linux/magic.h> > +# if HAVE_LINUX_MAGIC_H > +# include <linux/magic.h> > +# endif Don't bother with this - just kill this include off completely. It is a waste of time using it if we can't rely on it existing & have to re-define everything ourselves.