From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas@monjalon.net>
Subject: Re: [PATCH v3 7/8] mk: sort object files when building
	deps lists
Date: Tue, 27 Jun 2017 01:20:42 +0200
Message-ID: <2558671.pWjLEmoHCY@xps>
References: <20170623181616.16981-1-lboccass@brocade.com>
 <20170623184153.24488-1-lboccass@brocade.com>
 <20170623184153.24488-8-lboccass@brocade.com>
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To: Luca Boccassi <luca.boccassi@gmail.com>
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23/06/2017 20:41, lboccass@brocade.com:
> From: Luca Boccassi <luca.boccassi@gmail.com>
> 
> In order to achieve reproducible builds, always use the same
> order when listing object files to build dependencies lists.
> 
> Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>
> ---
>  mk/rte.app.mk     | 4 ++--
>  mk/rte.hostapp.mk | 4 ++--
>  mk/rte.shared.mk  | 4 ++--
>  3 files changed, 6 insertions(+), 6 deletions(-)
> 
> --- a/mk/rte.app.mk
> +++ b/mk/rte.app.mk
> @@ -263,8 +263,8 @@ LDLIBS_NAMES += $(patsubst -Wl$(comma)-l%,lib%.a,$(filter -Wl$(comma)-l%,$(LDLIB
>  
>  # list of found libraries files (useful for deps). If not found, the
>  # library is silently ignored and dep won't be checked
> -LDLIBS_FILES := $(wildcard $(foreach dir,$(LDLIBS_PATH),\
> -	$(addprefix $(dir)/,$(LDLIBS_NAMES))))
> +LDLIBS_FILES := $(sort $(wildcard $(foreach dir,$(LDLIBS_PATH),\
> +	$(addprefix $(dir)/,$(LDLIBS_NAMES)))))

You cannot sort libraries.
Check - for instance - this comment above in this file:
	# Eliminate duplicates without sorting, only keep the last occurrence
	filter-libs = \

Why sorting them?
What is random in libraries list?