[patch] multiprocessing.eclass.patch

file_490620.txt (text/plain), 1.16 KB, created by Tom Wijsman (TomWij) (RETIRED) on 2013-11-09 23:37:03 UTC

--- a/multiprocessing.eclass	2013-10-12 23:31:16.000000000 +0200
+++ b/multiprocessing.eclass	2013-11-06 22:30:03.487129897 +0100
@@ -55,6 +55,25 @@
 	echo ${jobs:-1}
 }
 
+# @FUNCTION: makeopts_loadavg
+# @USAGE: [${MAKEOPTS}]
+# @DESCRIPTION:
+# Searches the arguments (defaults to ${MAKEOPTS}) and extracts the value set
+# for load-average. For make and ninja based builds this will mean new jobs are 
+# not only limited by the jobs-value, but also by the current load - which might 
+# get excessive due to I/O and not just due to CPU load.
+# Be aware that the returned number might be a floating-point number. Test
+# whether your software supports that.
+makeopts_loadavg() {
+	[[ $# -eq 0 ]] && set -- ${MAKEOPTS}
+	# This assumes the first .* will be more greedy than the second .*
+	# since POSIX doesn't specify a non-greedy match (i.e. ".*?").
+	local lavg=$(echo " $* " | sed -r -n \
+		-e 's:.*[[:space:]](-l|--load-average[=[:space:]])[[:space:]]*([0-9]+|[0-9]+\.[0-9]+)[^0-9.]*:\2:p' \
+		-e 's:.*[[:space:]](-l|--load-average)[[:space:]].*:999:p')
+	echo ${lavg:-1}
+}
+
 # @FUNCTION: multijob_init
 # @USAGE: [${MAKEOPTS}]
 # @DESCRIPTION: