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Message-ID: <cfee36c5-c5d9-49db-bc94-c6e5fdb77840@linuxfoundation.org>
Date: Fri, 28 Jun 2024 14:44:04 -0600
From: Shuah Khan <skhan@...uxfoundation.org>
To: Roman Storozhenko <romeusmeister@...il.com>,
 Thomas Renninger <trenn@...e.com>, Shuah Khan <shuah@...nel.org>
Cc: Javier Carrasco <javier.carrasco.cruz@...il.com>,
 linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
 Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH] cpupower: fix lib default installation path

On 6/23/24 07:10, Roman Storozhenko wrote:
> Invocation the tool built with the default settings fails:
> $ cpupower
> cpupower: error while loading shared libraries: libcpupower.so.1: cannot
> open shared object file: No such file or directory> The issue is that Makefile puts the library to "/usr/lib64" dir for a 64
> bit machine. This is wrong. According to the "File hierarchy standard
> specification:
> https://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard
> https://refspecs.linuxfoundation.org/FHS_3.0/fhs-3.0.pdf
> 
> "/usr/lib<qual>" dirs are intended for alternative-format libraries
> (e.g., "/usr/lib32" for 32-bit libraries on a 64-bit machine (optional)).
> 
> The utility is built for the current machine and doesn't change bit
> depth.
> Fix the issue by changing library destination dir to "/usr/lib".
> 
> Signed-off-by: Roman Storozhenko <romeusmeister@...il.com>
> ---
>   tools/power/cpupower/Makefile | 10 +---------
>   1 file changed, 1 insertion(+), 9 deletions(-)
> 
> diff --git a/tools/power/cpupower/Makefile b/tools/power/cpupower/Makefile
> index cd0225a312b4..6c02f401069e 100644
> --- a/tools/power/cpupower/Makefile
> +++ b/tools/power/cpupower/Makefile
> @@ -67,6 +67,7 @@ LANGUAGES = 			de fr it cs pt ka
>   bindir ?=	/usr/bin
>   sbindir ?=	/usr/sbin
>   mandir ?=	/usr/man
> +libdir ?=	/usr/lib
>   includedir ?=	/usr/include
>   localedir ?=	/usr/share/locale
>   docdir ?=       /usr/share/doc/packages/cpupower
> @@ -94,15 +95,6 @@ RANLIB = $(CROSS)ranlib
>   HOSTCC = gcc
>   MKDIR = mkdir

These are set when make invoked from the kernel main
Makefile - see "make tools" option in main Makefile
>   
> -# 64bit library detection
> -include ../../scripts/Makefile.arch

This does the 64-librray detection based on arch.
> -
> -ifeq ($(IS_64_BIT), 1)
> -libdir ?=	/usr/lib64
> -else
> -libdir ?=	/usr/lib
> -endif
> -
>   # Now we set up the build system
>   #
>   
> 
> ---
> base-commit: f76698bd9a8ca01d3581236082d786e9a6b72bb7
> change-id: 20240623-fix-lib-install-3b7dccdbdf45
> 
> Best regards,

What happens if you cross-compile with this patch? Take a look at this
commit that fixed cross-compile:

a73f6e2fbe8077811ea9546e0d44a7533111f0ba

This makefile has to be in sync with the rest of the tools - see
"make tools" in the kernel main Makefile.

thanks,
-- Shuah



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