[dpdk-dev] [PATCH] mk: restrict CPU flags list

[Thomas Monjalon]

When compiling each file, the CPU flags are given as RTE_MACHINE_CPUFLAG_*
and in the list RTE_COMPILE_TIME_CPUFLAGS.

RTE_MACHINE_CPUFLAG_* are used to check the CPU features when compiling.

The list RTE_COMPILE_TIME_CPUFLAGS is used only to check the CPU at
runtime in the function rte_cpu_check_supported(). So it is not needed to
define this list for every files.
That's why RTE_COMPILE_TIME_CPUFLAGS is removed from the common variable
MACHINE_CFLAGS and is added only to the CFLAGS of eal_common_cpuflags.c.

Signed-off-by: Thomas Monjalon <thomas.monjalon at 6wind.com>
---
 lib/librte_eal/bsdapp/eal/Makefile   | 2 ++
 lib/librte_eal/linuxapp/eal/Makefile | 2 ++
 mk/rte.cpuflags.mk                   | 2 +-
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/librte_eal/bsdapp/eal/Makefile b/lib/librte_eal/bsdapp/eal/Makefile
index 349b0d0..9054ad6 100644
--- a/lib/librte_eal/bsdapp/eal/Makefile
+++ b/lib/librte_eal/bsdapp/eal/Makefile
@@ -92,6 +92,8 @@ SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += rte_keepalive.c
 # from arch dir
 SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += rte_cpuflags.c
 
+CFLAGS_eal_common_cpuflags.o := $(CPUFLAGS_LIST)
+
 CFLAGS_eal.o := -D_GNU_SOURCE
 #CFLAGS_eal_thread.o := -D_GNU_SOURCE
 CFLAGS_eal_log.o := -D_GNU_SOURCE
diff --git a/lib/librte_eal/linuxapp/eal/Makefile b/lib/librte_eal/linuxapp/eal/Makefile
index 25b3a8e..53d5b69 100644
--- a/lib/librte_eal/linuxapp/eal/Makefile
+++ b/lib/librte_eal/linuxapp/eal/Makefile
@@ -102,6 +102,8 @@ SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += rte_keepalive.c
 # from arch dir
 SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += rte_cpuflags.c
 
+CFLAGS_eal_common_cpuflags.o := $(CPUFLAGS_LIST)
+
 CFLAGS_eal.o := -D_GNU_SOURCE
 CFLAGS_eal_interrupts.o := -D_GNU_SOURCE
 CFLAGS_eal_pci_vfio_mp_sync.o := -D_GNU_SOURCE
diff --git a/mk/rte.cpuflags.mk b/mk/rte.cpuflags.mk
index 19a3e7e..c494654 100644
--- a/mk/rte.cpuflags.mk
+++ b/mk/rte.cpuflags.mk
@@ -128,4 +128,4 @@ empty:=
 space:= $(empty) $(empty)
 CPUFLAGSTMP1 := $(addprefix RTE_CPUFLAG_,$(CPUFLAGS))
 CPUFLAGSTMP2 := $(subst $(space),$(comma),$(CPUFLAGSTMP1))
-MACHINE_CFLAGS += -DRTE_COMPILE_TIME_CPUFLAGS=$(CPUFLAGSTMP2)
+CPUFLAGS_LIST := -DRTE_COMPILE_TIME_CPUFLAGS=$(CPUFLAGSTMP2)
-- 
2.7.0