maint.mk: avoid extra forks

* top/maint.mk (_cfg_mk): The GNU make manual documents that
"$(wildcard FILE)" expands to empty if FILE doesn't exist.
So use that instead of "$(shell test -f FILE && echo FILE)".

diff --git a/ChangeLog b/ChangeLog
index b4b242e..413e435 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2012-12-08  Stefano Lattarini  <stefano.lattarini@gmail.com>
+
+       maint.mk: avoid extra forks
+       * top/maint.mk (_cfg_mk): The GNU make manual documents that
+       "$(wildcard FILE)" expands to empty if FILE doesn't exist.
+       So use that instead of "$(shell test -f FILE && echo FILE)".
+
 2012-12-07  Paul Eggert  <eggert@cs.ucla.edu>
 
        vasnprintf: fix ASCII_ONLY typo

diff --git a/top/maint.mk b/top/maint.mk
index cd365e7..fd2b41b 100644 (file)
--- a/top/maint.mk
+++ b/top/maint.mk
@@ -155,7 +155,7 @@ export LC_ALL = C
 ## Sanity checks.  ##
 ## --------------- ##
 
-_cfg_mk := $(shell test -f $(srcdir)/cfg.mk && echo '$(srcdir)/cfg.mk')
+_cfg_mk := $(wildcard $(srcdir)/cfg.mk)
 
 # Collect the names of rules starting with 'sc_'.
 syntax-check-rules := $(sort $(shell sed -n 's/^\(sc_[a-zA-Z0-9_-]*\):.*/\1/p' \