Description: mk: sort source files before passing them to the compiler

In order to achieve reproducible builds, always use the same
order when listing files for compilation.

Origin: http://dpdk.org/dev/patchwork/patch/27510/
Forwarded: yes
Author: Luca Boccassi <luca.boccassi@gmail.com>
Last-Update: 2017-08-10
---
 drivers/net/cxgbe/Makefile    | 2 +-
 drivers/net/e1000/Makefile    | 2 +-
 drivers/net/fm10k/Makefile    | 2 +-
 drivers/net/i40e/Makefile     | 2 +-
 drivers/net/ixgbe/Makefile    | 2 +-
 drivers/net/qede/Makefile     | 2 +-
 drivers/net/sfc/Makefile      | 2 +-
 drivers/net/thunderx/Makefile | 2 +-
 8 files changed, 8 insertions(+), 8 deletions(-)

--- a/drivers/net/cxgbe/Makefile
+++ b/drivers/net/cxgbe/Makefile
@@ -67,7 +67,7 @@ endif
 # Add extra flags for base driver files (also known as shared code)
 # to disable warnings in them
 #
-BASE_DRIVER_OBJS=$(patsubst %.c,%.o,$(notdir $(wildcard $(SRCDIR)/base/*.c)))
+BASE_DRIVER_OBJS=$(sort $(patsubst %.c,%.o,$(notdir $(wildcard $(SRCDIR)/base/*.c))))
 $(foreach obj, $(BASE_DRIVER_OBJS), $(eval CFLAGS_$(obj)+=$(CFLAGS_BASE_DRIVER)))
 
 VPATH += $(SRCDIR)/base
--- a/drivers/net/e1000/Makefile
+++ b/drivers/net/e1000/Makefile
@@ -65,7 +65,7 @@ endif
 # Add extra flags for base driver files (also known as shared code)
 # to disable warnings in them
 #
-BASE_DRIVER_OBJS=$(patsubst %.c,%.o,$(notdir $(wildcard $(SRCDIR)/base/*.c)))
+BASE_DRIVER_OBJS=$(sort $(patsubst %.c,%.o,$(notdir $(wildcard $(SRCDIR)/base/*.c))))
 $(foreach obj, $(BASE_DRIVER_OBJS), $(eval CFLAGS_$(obj)+=$(CFLAGS_BASE_DRIVER)))
 
 VPATH += $(SRCDIR)/base
--- a/drivers/net/fm10k/Makefile
+++ b/drivers/net/fm10k/Makefile
@@ -77,7 +77,7 @@ endif
 #
 # Add extra flags for base driver source files to disable warnings in them
 #
-BASE_DRIVER_OBJS=$(patsubst %.c,%.o,$(notdir $(wildcard $(SRCDIR)/base/*.c)))
+BASE_DRIVER_OBJS=$(sort $(patsubst %.c,%.o,$(notdir $(wildcard $(SRCDIR)/base/*.c))))
 $(foreach obj, $(BASE_DRIVER_OBJS), $(eval CFLAGS_$(obj)+=$(CFLAGS_BASE_DRIVER)))
 
 VPATH += $(SRCDIR)/base
--- a/drivers/net/i40e/Makefile
+++ b/drivers/net/i40e/Makefile
@@ -78,7 +78,7 @@ endif
 
 CFLAGS_i40e_lan_hmc.o += -Wno-error
 endif
-OBJS_BASE_DRIVER=$(patsubst %.c,%.o,$(notdir $(wildcard $(SRCDIR)/base/*.c)))
+OBJS_BASE_DRIVER=$(sort $(patsubst %.c,%.o,$(notdir $(wildcard $(SRCDIR)/base/*.c))))
 $(foreach obj, $(OBJS_BASE_DRIVER), $(eval CFLAGS_$(obj)+=$(CFLAGS_BASE_DRIVER)))
 
 VPATH += $(SRCDIR)/base
--- a/drivers/net/ixgbe/Makefile
+++ b/drivers/net/ixgbe/Makefile
@@ -84,7 +84,7 @@ endif
 # Add extra flags for base driver files (also known as shared code)
 # to disable warnings in them
 #
-BASE_DRIVER_OBJS=$(patsubst %.c,%.o,$(notdir $(wildcard $(SRCDIR)/base/*.c)))
+BASE_DRIVER_OBJS=$(sort $(patsubst %.c,%.o,$(notdir $(wildcard $(SRCDIR)/base/*.c))))
 $(foreach obj, $(BASE_DRIVER_OBJS), $(eval CFLAGS_$(obj)+=$(CFLAGS_BASE_DRIVER)))
 
 VPATH += $(SRCDIR)/base
--- a/drivers/net/qede/Makefile
+++ b/drivers/net/qede/Makefile
@@ -75,7 +75,7 @@ endif
 # to disable warnings in them
 #
 #
-BASE_DRIVER_OBJS=$(patsubst %.c,%.o,$(notdir $(wildcard $(SRCDIR)/base/*.c)))
+BASE_DRIVER_OBJS=$(sort $(patsubst %.c,%.o,$(notdir $(wildcard $(SRCDIR)/base/*.c))))
 $(foreach obj, $(BASE_DRIVER_OBJS), $(eval CFLAGS+=$(CFLAGS_BASE_DRIVER)))
 
 #
--- a/drivers/net/thunderx/Makefile
+++ b/drivers/net/thunderx/Makefile
@@ -45,7 +45,7 @@ EXPORT_MAP := rte_pmd_thunderx_nicvf_ver
 
 LIBABIVER := 1
 
-OBJS_BASE_DRIVER=$(patsubst %.c,%.o,$(notdir $(wildcard $(SRCDIR)/base/*.c)))
+OBJS_BASE_DRIVER=$(sort $(patsubst %.c,%.o,$(notdir $(wildcard $(SRCDIR)/base/*.c))))
 $(foreach obj, $(OBJS_BASE_DRIVER), $(eval CFLAGS_$(obj)+=$(CFLAGS_BASE_DRIVER)))
 
 VPATH += $(SRCDIR)/base