From ee6c466ba807fb16f3d37c72ece5ec28fb6c87fc Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering@redhat.com>
Date: Wed, 9 Feb 2011 17:08:58 +0100
Subject: tests: avoid gross inefficiency in "make test"

Do not run a sub-make to set up the environment for each
and every test script.  Instead, run it just once and store
the result in a file.
* tests/check.mk (built_programs): Remove definition.
(.built-programs): New rule to create the temporary file.
(CLEANFILES): Arrange to remove it.
(TESTS_ENVIRONMENT): Simply cat .built-programs, rather than
running the sub-make.
* .gitignore: Ignore it.
---
 tests/check.mk | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

(limited to 'tests')

diff --git a/tests/check.mk b/tests/check.mk
index f931806d2..b80dce8ac 100644
--- a/tests/check.mk
+++ b/tests/check.mk
@@ -40,8 +40,13 @@ vc_exe_in_TESTS: Makefile
 check: vc_exe_in_TESTS
 .PHONY: vc_exe_in_TESTS
 
-built_programs = \
-  (cd $(top_builddir)/src && MAKEFLAGS= $(MAKE) -s built_programs.list)
+CLEANFILES =
+CLEANFILES += .built-programs
+check-am: .built-programs
+.built-programs:
+	$(AM_V_GEN)cd $(top_builddir)/src				\
+            && MAKEFLAGS= $(MAKE) -s built_programs.list		\
+          > $@-t && mv $@-t $@
 
 # Note that the first lines are statements.  They ensure that environment
 # variables that can perturb tests are unset or set to expected values.
@@ -76,7 +81,7 @@ TESTS_ENVIRONMENT =				\
   abs_top_builddir='$(abs_top_builddir)'	\
   abs_top_srcdir='$(abs_top_srcdir)'		\
   abs_srcdir='$(abs_srcdir)'			\
-  built_programs="`$(built_programs)`"		\
+  built_programs="`cat .built-programs`"	\
   host_os=$(host_os)				\
   host_triplet='$(host_triplet)'		\
   srcdir='$(srcdir)'				\
-- 
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