[CRIU] [PATCHv2 1/2] build/nmk: use TAGS instead ETAGS and CTAGS

[Dmitry Safonov]

Impact: do not use both, do not try to use one of them without a check.

Signed-off-by: Dmitry Safonov <dsafonov at virtuozzo.com>
---
 scripts/nmk/scripts/tools.mk | 8 ++++++--
 scripts/nmk/scripts/utils.mk | 3 +++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/scripts/nmk/scripts/tools.mk b/scripts/nmk/scripts/tools.mk
index 0538dde..fa4816d 100644
--- a/scripts/nmk/scripts/tools.mk
+++ b/scripts/nmk/scripts/tools.mk
@@ -22,8 +22,12 @@ SH		:= $(shell if [ -x "$$BASH" ]; then echo $$BASH;        \
                         else if [ -x /bin/bash ]; then echo /bin/bash;  \
                         else echo sh; fi ; fi)
 CSCOPE		:= cscope
-ETAGS		:= etags
-CTAGS		:= ctags
+
+ifeq ($(call pkg-check, etags --version),y)
+TAGS		:= etags
+else
+TAGS		:= ctags
+endif
 
 export RM LD CC CPP AS AR STRIP OBJCOPY OBJDUMP
 export NM SH MAKE MKDIR AWK PERL PYTHON SH CSCOPE
diff --git a/scripts/nmk/scripts/utils.mk b/scripts/nmk/scripts/utils.mk
index 50ceb7a..e452ab4 100644
--- a/scripts/nmk/scripts/utils.mk
+++ b/scripts/nmk/scripts/utils.mk
@@ -12,6 +12,9 @@ try-cc = $(shell sh -c
 # Usage: ifeq ($(call pkg-config-check, library),y)
 pkg-config-check = $(shell sh -c 'pkg-config $(1) && echo y')
 
+# Usage: ifeq ($(call pkg-check, package --version),y)
+pkg-check = $(shell sh -c '$(1) && echo y')
+
 #
 # Remove duplicates.
 uniq = $(strip $(if $1,$(firstword $1) $(call uniq,$(filter-out $(firstword $1),$1))))
-- 
2.7.1