make use of make variable CURDIR instead of calling pwd

make already provides the current working directory in a variable, so make
use of it instead of forking a shell. Also replace usage of PWD by
CURDIR. PWD is provided by most shells, but not all, so this makes the
build system more robust.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Michal Marek <mmarek@suse.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
index 041b493ad3ab..27e019c09bd2 100644
--- a/tools/objtool/Makefile
+++ b/tools/objtool/Makefile
@@ -11,12 +11,12 @@ LD = ld
 AR = ar
 
 ifeq ($(srctree),)
-srctree := $(patsubst %/,%,$(dir $(shell pwd)))
+srctree := $(patsubst %/,%,$(dir $(CURDIR)))
 srctree := $(patsubst %/,%,$(dir $(srctree)))
 endif
 
 SUBCMD_SRCDIR           = $(srctree)/tools/lib/subcmd/
-LIBSUBCMD_OUTPUT        = $(if $(OUTPUT),$(OUTPUT),$(PWD)/)
+LIBSUBCMD_OUTPUT        = $(if $(OUTPUT),$(OUTPUT),$(CURDIR)/)
 LIBSUBCMD               = $(LIBSUBCMD_OUTPUT)libsubcmd.a
 
 OBJTOOL    := $(OUTPUT)objtool