[PATCH] Makefile: Use make internal string functions

[Laurent Vivier <lvivier@redhat.com>]

TARGET_ARCH is computed from '$(CC) -dumpmachine' using external
bash commands like echo, cut, tr and sed. This can be done using
make internal string functions.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
---
 Makefile | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index cb7448079de5..1fce73707805 100644
--- a/Makefile
+++ b/Makefile
@@ -17,8 +17,9 @@ DUAL_STACK_SOCKETS := 1
 
 TARGET ?= $(shell $(CC) -dumpmachine)
 # Get 'uname -m'-like architecture description for target
-TARGET_ARCH := $(shell echo $(TARGET) | cut -f1 -d- | tr [A-Z] [a-z])
-TARGET_ARCH := $(shell echo $(TARGET_ARCH) | sed 's/powerpc/ppc/')
+TARGET_ARCH := $(firstword $(subst -, ,$(TARGET)))
+TARGET_ARCH := $(patsubst [:upper:],[:lower:],$(TARGET_ARCH))
+TARGET_ARCH := $(subst powerpc,ppc,$(TARGET_ARCH))
 
 # On some systems enabling optimization also enables source fortification,
 # automagically. Do not override it.
-- 
@@ -17,8 +17,9 @@ DUAL_STACK_SOCKETS := 1
 
 TARGET ?= $(shell $(CC) -dumpmachine)
 # Get 'uname -m'-like architecture description for target
-TARGET_ARCH := $(shell echo $(TARGET) | cut -f1 -d- | tr [A-Z] [a-z])
-TARGET_ARCH := $(shell echo $(TARGET_ARCH) | sed 's/powerpc/ppc/')
+TARGET_ARCH := $(firstword $(subst -, ,$(TARGET)))
+TARGET_ARCH := $(patsubst [:upper:],[:lower:],$(TARGET_ARCH))
+TARGET_ARCH := $(subst powerpc,ppc,$(TARGET_ARCH))
 
 # On some systems enabling optimization also enables source fortification,
 # automagically. Do not override it.
-- 
2.47.0