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Re: [Cluster-devel] [PATCH] avoid configure failure with F10's 2.6.27.21 kernel headers



Hi Jim,

Which branch is this for? It doesn't apply to gfs2-utils.git...

Andrew

On Fri, Jun 19, 2009 at 08:26:47PM +0200, Jim Meyering wrote:
> Without the patch below, ./configure would fail like this on Fedora 10:
> 
>   checking linux/dlm_plock.h usability... no
>   checking linux/dlm_plock.h presence... yes
>   configure: WARNING: linux/dlm_plock.h: present but cannot be compiled
>   configure: WARNING: linux/dlm_plock.h:     check for missing prerequisite headers?
>   configure: WARNING: linux/dlm_plock.h: see the Autoconf documentation
>   configure: WARNING: linux/dlm_plock.h:     section "Present But Cannot Be Compiled"
>   configure: WARNING: linux/dlm_plock.h: proceeding with the compiler's result
>   configure: WARNING:     ## --------------------------------------- ##
>   configure: WARNING:     ## Report this to linux-cluster redhat com ##
>   configure: WARNING:     ## --------------------------------------- ##
>   checking for linux/dlm_plock.h... no
>   configure: error: Unable to find dlm kernel headers.
>   Make sure to install kernel headers 2.6.26 (or higher) or use --with-kernel=path
>   configure option to point to the kernel source.
>   [Exit 1]
> 
> and config.log showed the problem:
> 
>   In file included from conftest.c:79:0:
>   /usr/include/linux/dlm_plock.h:25:2: error: expected specifier-qualifier-list before '__u32'
> 
> Here's the patch:
> 
> >From 013d711c8731da4f11df2437c6c1251d7edb91ea Mon Sep 17 00:00:00 2001
> From: Jim Meyering <meyering redhat com>
> Date: Fri, 19 Jun 2009 20:24:18 +0200
> Subject: [PATCH] avoid configure failure with F10's 2.6.27.21 kernel headers
> 
> * configure.ac: Include <linux/types.h> before checking for
> linux/dlm_plock.h.  Otherwise, we'd get a syntax error on __u32.
> ---
>  configure.ac |    9 +++++++--
>  1 files changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/configure.ac b/configure.ac
> index b10639b..d50de87 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -154,12 +154,17 @@ BACKUP_CPPFLAGS="$CPPFLAGS"
>  CPPFLAGS="$KERNEL_CPPFLAGS"
> 
>  # check kernel headers
> +AC_CHECK_HEADERS([linux/major.h linux/types.h linux/dlmconstants.h])
> +AC_CHECK_HEADERS([linux/dlm.h linux/dlm_device.h])
>  # 2.6.26 adds dlm_plock.h that's our checking barrier, instead
>  # of implementing some insane kernel version checks
> -AC_CHECK_HEADERS([linux/major.h linux/types.h linux/dlmconstants.h linux/dlm.h linux/dlm_device.h linux/dlm_plock.h],,
> +# At least on 2.6.27.21-170.2.56.fc10.x86_64, one must include
> +# <linux/types.h> to avoid syntax errors regarding __u32.
> +AC_CHECK_HEADERS([linux/dlm_plock.h],,
>  		 [AC_MSG_ERROR([Unable to find dlm kernel headers.
>  Make sure to install kernel headers 2.6.26 (or higher) or use --with-kernel=path
> -configure option to point to the kernel source.])])
> +configure option to point to the kernel source.])],
> +  [#include <linux/types.h>])
> 
> 
>  CPPFLAGS="$BACKUP_CPPFLAGS"
> --
> 1.6.3.2.416.g04d0
> 
> 


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