Re: [PATCH] tests: avoid gross inefficiency in "make test"

[Jim Meyering]

Jim Meyering wrote:
> Running "make -j25 check" on a nominal-12-core F14 system would
> cause serious difficulty leading to an OOM kill -- and this is brand new.
> It worked fine yesterday.  I tracked it down to all of the make processes
> working on the "built_programs.list" (in src/Makefile.am) rule
...
> -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 $@

I fixed the above rule last night (it puts the .built-programs
file in ../src rather than in "." where it's required), but somehow I
pushed the original.

Here's the fix:

>From 15571e0c8f4be1170184388f9acd8259ba75b22f Mon Sep 17 00:00:00 2001
From: Jim Meyering <address@hidden>
Date: Thu, 10 Feb 2011 10:01:23 +0100
Subject: [PATCH] tests: fix bug in preceding check.mk change

* tests/check.mk (.built-programs): Run cd'd submake in a subshell
so the redirected output ends up in the current directory, not ../src.
---
 tests/check.mk |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/check.mk b/tests/check.mk
index b80dce8..1e3ca85 100644
--- a/tests/check.mk
+++ b/tests/check.mk
@@ -44,8 +44,8 @@ CLEANFILES =
 CLEANFILES += .built-programs
 check-am: .built-programs
 .built-programs:
-       $(AM_V_GEN)cd $(top_builddir)/src                               \
-            && MAKEFLAGS= $(MAKE) -s built_programs.list               \
+       $(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
--
1.7.4.2.g597a6