Re: [dpdk-dev] [PATCH v2] ifpga/base/meson: fix looking for librt

Re: [dpdk-dev] [PATCH v2] ifpga/base/meson: fix looking for librt

[Xu, Rosen]

CC Tianfei, who is maintainer.

> -----Original Message-----
> From: Hussin, Mohamad Noor Alim <mohamad.noor.alim.hussin@intel.com>
> Sent: Wednesday, June 30, 2021 17:26
> To: Xu, Rosen <rosen.xu@intel.com>
> Cc: dev@dpdk.org; Hussin, Mohamad Noor Alim
> <mohamad.noor.alim.hussin@intel.com>; Huang, Wei
> <wei.huang@intel.com>; stable@dpdk.org
> Subject: [PATCH v2] ifpga/base/meson: fix looking for librt
> 
> Finding with "librt" keyword would give the output with full path of librt such
> as /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/librt.so
> instead of -lrt in libdpdk.pc pkg-config file.
> 
> Assume find_library() will prepend "lib", thus remove "lib" from "librt"
> keyword. The output will shows as -lrt.
> 
> This will cause an issue when compile DPDK app with static library as the
> path of librt has been hard-coded in the libdpdk.pc file.
> 
> Fixes: e41856b515ce ("raw/ifpga/base: enhance driver reliability in multi-
> process")
> Cc: wei.huang@intel.com
> Cc: stable@dpdk.org
> 
> Signed-off-by: Mohamad Noor Alim Hussin
> <mohamad.noor.alim.hussin@intel.com>
> ---
>  drivers/raw/ifpga/base/meson.build | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/raw/ifpga/base/meson.build
> b/drivers/raw/ifpga/base/meson.build
> index 8d27c6021..ce592a13a 100644
> --- a/drivers/raw/ifpga/base/meson.build
> +++ b/drivers/raw/ifpga/base/meson.build
> @@ -27,7 +27,7 @@ sources = [
> 
>  rtdep = dependency('librt', required: false)  if not rtdep.found()
> -    rtdep = cc.find_library('librt', required: false)
> +    rtdep = cc.find_library('rt', required: false)
>  endif
>  if not rtdep.found()
>      build = false
> --
> 2.17.1

Re: [dpdk-dev] [PATCH v2] ifpga/base/meson: fix looking for librt

[Zhang, Tianfei]

> -----Original Message-----
> From: Xu, Rosen <rosen.xu@intel.com>
> Sent: 2021年6月30日 18:03
> To: Hussin, Mohamad Noor Alim <mohamad.noor.alim.hussin@intel.com>;
> Zhang, Tianfei <tianfei.zhang@intel.com>
> Cc: dev@dpdk.org; Huang, Wei <wei.huang@intel.com>; stable@dpdk.org
> Subject: RE: [PATCH v2] ifpga/base/meson: fix looking for librt
> 
> CC Tianfei, who is maintainer.
> 
> > -----Original Message-----
> > From: Hussin, Mohamad Noor Alim
> <mohamad.noor.alim.hussin@intel.com>
> > Sent: Wednesday, June 30, 2021 17:26
> > To: Xu, Rosen <rosen.xu@intel.com>
> > Cc: dev@dpdk.org; Hussin, Mohamad Noor Alim
> > <mohamad.noor.alim.hussin@intel.com>; Huang, Wei
> > <wei.huang@intel.com>; stable@dpdk.org
> > Subject: [PATCH v2] ifpga/base/meson: fix looking for librt
> >
> > Finding with "librt" keyword would give the output with full path of
> > librt such as
> > /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/librt.so
> > instead of -lrt in libdpdk.pc pkg-config file.
> >
> > Assume find_library() will prepend "lib", thus remove "lib" from "librt"
> > keyword. The output will shows as -lrt.
> >
> > This will cause an issue when compile DPDK app with static library as
> > the path of librt has been hard-coded in the libdpdk.pc file.

How to reproduce this issue?

> >
> > Fixes: e41856b515ce ("raw/ifpga/base: enhance driver reliability in
> > multi-
> > process")
> > Cc: wei.huang@intel.com
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Mohamad Noor Alim Hussin
> > <mohamad.noor.alim.hussin@intel.com>
> > ---
> >  drivers/raw/ifpga/base/meson.build | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/raw/ifpga/base/meson.build
> > b/drivers/raw/ifpga/base/meson.build
> > index 8d27c6021..ce592a13a 100644
> > --- a/drivers/raw/ifpga/base/meson.build
> > +++ b/drivers/raw/ifpga/base/meson.build
> > @@ -27,7 +27,7 @@ sources = [
> >
> >  rtdep = dependency('librt', required: false)  if not rtdep.found()
> > -    rtdep = cc.find_library('librt', required: false)
> > +    rtdep = cc.find_library('rt', required: false)
> >  endif
> >  if not rtdep.found()
> >      build = false
> > --
> > 2.17.1

Re: [dpdk-dev] [PATCH v2] ifpga/base/meson: fix looking for librt

[Hussin, Mohamad Noor Alim]

Hi Tianfei,

To reproduce this, assume using Ubuntu 20.04.
1. Install libfdt (It will include ifpga driver from drivers/raw/ifpga/base)
    $ sudo apt-get install libfdt-dev
2. configure DPDK library
    $ meson build
3. check libdpdk.pc file in build/meson-private/libdpdk.pc. It will include path to librt.so without this patch.

Regards,
Alim Hussin

-----Original Message-----
From: Zhang, Tianfei <tianfei.zhang@intel.com> 
Sent: Thursday, July 1, 2021 9:19 PM
To: Xu, Rosen <rosen.xu@intel.com>; Hussin, Mohamad Noor Alim <mohamad.noor.alim.hussin@intel.com>
Cc: dev@dpdk.org; Huang, Wei <wei.huang@intel.com>; stable@dpdk.org
Subject: RE: [PATCH v2] ifpga/base/meson: fix looking for librt



> -----Original Message-----
> From: Xu, Rosen <rosen.xu@intel.com>
> Sent: 2021年6月30日 18:03
> To: Hussin, Mohamad Noor Alim <mohamad.noor.alim.hussin@intel.com>;
> Zhang, Tianfei <tianfei.zhang@intel.com>
> Cc: dev@dpdk.org; Huang, Wei <wei.huang@intel.com>; stable@dpdk.org
> Subject: RE: [PATCH v2] ifpga/base/meson: fix looking for librt
> 
> CC Tianfei, who is maintainer.
> 
> > -----Original Message-----
> > From: Hussin, Mohamad Noor Alim
> <mohamad.noor.alim.hussin@intel.com>
> > Sent: Wednesday, June 30, 2021 17:26
> > To: Xu, Rosen <rosen.xu@intel.com>
> > Cc: dev@dpdk.org; Hussin, Mohamad Noor Alim 
> > <mohamad.noor.alim.hussin@intel.com>; Huang, Wei 
> > <wei.huang@intel.com>; stable@dpdk.org
> > Subject: [PATCH v2] ifpga/base/meson: fix looking for librt
> >
> > Finding with "librt" keyword would give the output with full path of 
> > librt such as 
> > /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/librt.so
> > instead of -lrt in libdpdk.pc pkg-config file.
> >
> > Assume find_library() will prepend "lib", thus remove "lib" from "librt"
> > keyword. The output will shows as -lrt.
> >
> > This will cause an issue when compile DPDK app with static library 
> > as the path of librt has been hard-coded in the libdpdk.pc file.

How to reproduce this issue?

> >
> > Fixes: e41856b515ce ("raw/ifpga/base: enhance driver reliability in
> > multi-
> > process")
> > Cc: wei.huang@intel.com
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Mohamad Noor Alim Hussin 
> > <mohamad.noor.alim.hussin@intel.com>
> > ---
> >  drivers/raw/ifpga/base/meson.build | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/raw/ifpga/base/meson.build
> > b/drivers/raw/ifpga/base/meson.build
> > index 8d27c6021..ce592a13a 100644
> > --- a/drivers/raw/ifpga/base/meson.build
> > +++ b/drivers/raw/ifpga/base/meson.build
> > @@ -27,7 +27,7 @@ sources = [
> >
> >  rtdep = dependency('librt', required: false)  if not rtdep.found()
> > -    rtdep = cc.find_library('librt', required: false)
> > +    rtdep = cc.find_library('rt', required: false)
> >  endif
> >  if not rtdep.found()
> >      build = false
> > --
> > 2.17.1

Re: [dpdk-dev] [PATCH v2] ifpga/base/meson: fix looking for librt

[Zhang, Tianfei]

> 
> Hi Tianfei,
> 
> To reproduce this, assume using Ubuntu 20.04.
> 1. Install libfdt (It will include ifpga driver from drivers/raw/ifpga/base)
>     $ sudo apt-get install libfdt-dev
> 2. configure DPDK library
>     $ meson build
> 3. check libdpdk.pc file in build/meson-private/libdpdk.pc. It will include path
> to librt.so without this patch.

I have checked the libdpdk.pc and got the different between with and without this patch.
Without this patch, there are a full path for librt.so in libdpdk.pc. With this patch, it provide "-lrt" in libdpdk.pc.

This patch looks good for me.

Acked-by: Tianfei Zhang <Tianfei.zhang@intel.com>

> 
> Regards,
> Alim Hussin
> 
> -----Original Message-----
> From: Zhang, Tianfei <tianfei.zhang@intel.com>
> Sent: Thursday, July 1, 2021 9:19 PM
> To: Xu, Rosen <rosen.xu@intel.com>; Hussin, Mohamad Noor Alim
> <mohamad.noor.alim.hussin@intel.com>
> Cc: dev@dpdk.org; Huang, Wei <wei.huang@intel.com>; stable@dpdk.org
> Subject: RE: [PATCH v2] ifpga/base/meson: fix looking for librt
> 
> 
> 
> > -----Original Message-----
> > From: Xu, Rosen <rosen.xu@intel.com>
> > Sent: 2021年6月30日 18:03
> > To: Hussin, Mohamad Noor Alim <mohamad.noor.alim.hussin@intel.com>;
> > Zhang, Tianfei <tianfei.zhang@intel.com>
> > Cc: dev@dpdk.org; Huang, Wei <wei.huang@intel.com>; stable@dpdk.org
> > Subject: RE: [PATCH v2] ifpga/base/meson: fix looking for librt
> >
> > CC Tianfei, who is maintainer.
> >
> > > -----Original Message-----
> > > From: Hussin, Mohamad Noor Alim
> > <mohamad.noor.alim.hussin@intel.com>
> > > Sent: Wednesday, June 30, 2021 17:26
> > > To: Xu, Rosen <rosen.xu@intel.com>
> > > Cc: dev@dpdk.org; Hussin, Mohamad Noor Alim
> > > <mohamad.noor.alim.hussin@intel.com>; Huang, Wei
> > > <wei.huang@intel.com>; stable@dpdk.org
> > > Subject: [PATCH v2] ifpga/base/meson: fix looking for librt
> > >
> > > Finding with "librt" keyword would give the output with full path of
> > > librt such as
> > > /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/librt.so
> > > instead of -lrt in libdpdk.pc pkg-config file.
> > >
> > > Assume find_library() will prepend "lib", thus remove "lib" from "librt"
> > > keyword. The output will shows as -lrt.
> > >
> > > This will cause an issue when compile DPDK app with static library
> > > as the path of librt has been hard-coded in the libdpdk.pc file.
> 
> How to reproduce this issue?
> 
> > >
> > > Fixes: e41856b515ce ("raw/ifpga/base: enhance driver reliability in
> > > multi-
> > > process")
> > > Cc: wei.huang@intel.com
> > > Cc: stable@dpdk.org
> > >
> > > Signed-off-by: Mohamad Noor Alim Hussin
> > > <mohamad.noor.alim.hussin@intel.com>
> > > ---
> > >  drivers/raw/ifpga/base/meson.build | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/raw/ifpga/base/meson.build
> > > b/drivers/raw/ifpga/base/meson.build
> > > index 8d27c6021..ce592a13a 100644
> > > --- a/drivers/raw/ifpga/base/meson.build
> > > +++ b/drivers/raw/ifpga/base/meson.build
> > > @@ -27,7 +27,7 @@ sources = [
> > >
> > >  rtdep = dependency('librt', required: false)  if not rtdep.found()
> > > -    rtdep = cc.find_library('librt', required: false)
> > > +    rtdep = cc.find_library('rt', required: false)
> > >  endif
> > >  if not rtdep.found()
> > >      build = false
> > > --
> > > 2.17.1

Re: [dpdk-dev] [PATCH v2] ifpga/base/meson: fix looking for librt

[David Marchand]

Hello,

On Wed, Jul 14, 2021 at 5:40 AM Zhang, Tianfei <tianfei.zhang@intel.com> wrote:
>
> >
> > Hi Tianfei,
> >
> > To reproduce this, assume using Ubuntu 20.04.
> > 1. Install libfdt (It will include ifpga driver from drivers/raw/ifpga/base)
> >     $ sudo apt-get install libfdt-dev
> > 2. configure DPDK library
> >     $ meson build
> > 3. check libdpdk.pc file in build/meson-private/libdpdk.pc. It will include path
> > to librt.so without this patch.
>
> I have checked the libdpdk.pc and got the different between with and without this patch.
> Without this patch, there are a full path for librt.so in libdpdk.pc. With this patch, it provide "-lrt" in libdpdk.pc.
>
> This patch looks good for me.
>
> Acked-by: Tianfei Zhang <Tianfei.zhang@intel.com>

I can't find the original mail to dev@dpdk.org and patchwork did not help.
Please, can you resubmit this patch?

Also copy Bruce as this touches a meson subtlety I was not aware of,
and he should probably have a look.


Thanks.

-- 
David Marchand

Re: [dpdk-dev] [PATCH v2] ifpga/base/meson: fix looking for librt

[Bruce Richardson]

On Thu, Jul 15, 2021 at 10:00:19AM +0200, David Marchand wrote:
> Hello,
> 
> On Wed, Jul 14, 2021 at 5:40 AM Zhang, Tianfei <tianfei.zhang@intel.com> wrote:
> >
> > >
> > > Hi Tianfei,
> > >
> > > To reproduce this, assume using Ubuntu 20.04.
> > > 1. Install libfdt (It will include ifpga driver from drivers/raw/ifpga/base)
> > >     $ sudo apt-get install libfdt-dev
> > > 2. configure DPDK library
> > >     $ meson build
> > > 3. check libdpdk.pc file in build/meson-private/libdpdk.pc. It will include path
> > > to librt.so without this patch.
> >
> > I have checked the libdpdk.pc and got the different between with and without this patch.
> > Without this patch, there are a full path for librt.so in libdpdk.pc. With this patch, it provide "-lrt" in libdpdk.pc.
> >
> > This patch looks good for me.
> >
> > Acked-by: Tianfei Zhang <Tianfei.zhang@intel.com>
> 
> I can't find the original mail to dev@dpdk.org and patchwork did not help.
> Please, can you resubmit this patch?
> 
> Also copy Bruce as this touches a meson subtlety I was not aware of,
> and he should probably have a look.
> 
Thanks for flagging this to me, I wasn't aware of the subtlety here at all,
but it's good to know for future reference. If asked, I would generally
have recommended using find_library without the "lib" prefix on the library
name, but I had no idea using with or without leads to different output.

Acked-by: Bruce Richardson <bruce.richardson@intel.com>

/Bruce

[dpdk-dev] [PATCH v2] ifpga/base/meson: fix looking for librt

[mohamad.noor.alim.hussin]

From: Mohamad Noor Alim Hussin <mohamad.noor.alim.hussin@intel.com>

Finding with "librt" keyword would give the output with full path of librt such
as /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/librt.so
instead of -lrt in libdpdk.pc pkg-config file.

Assume find_library() will prepend "lib", thus remove "lib" from "librt"
keyword. The output will shows as -lrt.

This will cause an issue when compile DPDK app with static library as the
path of librt has been hard-coded in the libdpdk.pc file.

Fixes: e41856b515ce ("raw/ifpga/base: enhance driver reliability in multi-process")
Cc: tianfei.zhang@intel.com
Cc: stable@dpdk.org

Signed-off-by: Mohamad Noor Alim Hussin <mohamad.noor.alim.hussin@intel.com>
---
 drivers/raw/ifpga/base/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/raw/ifpga/base/meson.build b/drivers/raw/ifpga/base/meson.build
index da2d6e33c..949f7f127 100644
--- a/drivers/raw/ifpga/base/meson.build
+++ b/drivers/raw/ifpga/base/meson.build
@@ -25,7 +25,7 @@ sources = [
 
 rtdep = dependency('librt', required: false)
 if not rtdep.found()
-	rtdep = cc.find_library('librt', required: false)
+	rtdep = cc.find_library('rt', required: false)
 endif
 if not rtdep.found()
 	build = false
-- 
2.32.0

Re: [dpdk-dev] [PATCH v2] ifpga/base/meson: fix looking for librt

[Ferruh Yigit]

On 7/22/2021 9:16 AM, mohamad.noor.alim.hussin@intel.com wrote:
> From: Mohamad Noor Alim Hussin <mohamad.noor.alim.hussin@intel.com>
> 
> Finding with "librt" keyword would give the output with full path of librt such
> as /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/librt.so
> instead of -lrt in libdpdk.pc pkg-config file.
> 
> Assume find_library() will prepend "lib", thus remove "lib" from "librt"
> keyword. The output will shows as -lrt.
> 
> This will cause an issue when compile DPDK app with static library as the
> path of librt has been hard-coded in the libdpdk.pc file.
> 
> Fixes: e41856b515ce ("raw/ifpga/base: enhance driver reliability in multi-process")
> Cc: tianfei.zhang@intel.com
> Cc: stable@dpdk.org
> 
> Signed-off-by: Mohamad Noor Alim Hussin <mohamad.noor.alim.hussin@intel.com>

This patch is resent, because original patch was not in the patchwork as David
reminded.

But first patch already has acks, I am moving them here:

Acked-by: Tianfei Zhang <tianfei.zhang@intel.com>
(converted email address to all lowercase)

Acked-by: Bruce Richardson <bruce.richardson@intel.com>

Also I can produce the same, and patch looks good to me.


But it fails to apply clearly because of the white-space differences, and this
prevents CI running.

@Mohamad, can you please send a new version rebasing on top of latest code?
Please keep the acks above in the next version commit log, since the change will
be only white-space.

Thanks,
ferruh

[dpdk-dev] [PATCH v3] ifpga/base/meson: fix looking for librt

[mohamad.noor.alim.hussin]

From: Mohamad Noor Alim Hussin <mohamad.noor.alim.hussin@intel.com>

Finding with "librt" keyword would give the output with
full path of librt such as
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/librt.so
instead of -lrt in libdpdk.pc pkg-config file.

Assume find_library() will prepend "lib", thus remove
"lib" from "librt" keyword. The output will shows
as -lrt.

This will cause an issue when compile DPDK app with
static library as the path of librt has been hard-coded
in the libdpdk.pc file.

Fixes: e41856b515ce ("raw/ifpga/base: enhance driver reliability in multi-process")
Cc: tianfei.zhang@intel.com
Cc: stable@dpdk.org

Acked-by: Tianfei Zhang <tianfei.zhang@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

Signed-off-by: Mohamad Noor Alim Hussin <mohamad.noor.alim.hussin@intel.com>
---
 drivers/raw/ifpga/base/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/raw/ifpga/base/meson.build b/drivers/raw/ifpga/base/meson.build
index db602cee69..2de8e7ea22 100644
--- a/drivers/raw/ifpga/base/meson.build
+++ b/drivers/raw/ifpga/base/meson.build
@@ -27,7 +27,7 @@ sources = [
 
 rtdep = dependency('librt', required: false)
 if not rtdep.found()
-    rtdep = cc.find_library('librt', required: false)
+    rtdep = cc.find_library('rt', required: false)
 endif
 if not rtdep.found()
     build = false
-- 
2.32.0

Re: [dpdk-dev] [PATCH v3] ifpga/base/meson: fix looking for librt

[Thomas Monjalon]

28/09/2021 06:36, mohamad.noor.alim.hussin@intel.com:
> From: Mohamad Noor Alim Hussin <mohamad.noor.alim.hussin@intel.com>
> 
> Finding with "librt" keyword would give the output with
> full path of librt such as
> /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/librt.so
> instead of -lrt in libdpdk.pc pkg-config file.
> 
> Assume find_library() will prepend "lib", thus remove
> "lib" from "librt" keyword. The output will shows
> as -lrt.
> 
> This will cause an issue when compile DPDK app with
> static library as the path of librt has been hard-coded
> in the libdpdk.pc file.
> 
> Fixes: e41856b515ce ("raw/ifpga/base: enhance driver reliability in multi-process")
> Cc: tianfei.zhang@intel.com
> Cc: stable@dpdk.org
> 
> Acked-by: Tianfei Zhang <tianfei.zhang@intel.com>
> Acked-by: Bruce Richardson <bruce.richardson@intel.com>
> 
> Signed-off-by: Mohamad Noor Alim Hussin <mohamad.noor.alim.hussin@intel.com>

Applied, thanks.