Add an option to default the default build rule to parallel build.

[openwrt/svn-archive/archive.git] / Config.in

diff --git a/Config.in b/Config.in
index daecd171e9bd23818c158175aacb202b27f83b3a..c750a253308ddf93fb00b4b3ae573e5e32332d51 100644 (file)
--- a/Config.in
+++ b/Config.in
@@ -215,6 +215,52 @@ menu "Global build settings"
                help
                  Enable IPV6 support in packages (passes --enable-ipv6 to configure scripts).
 
+       config PKG_BUILD_PARALLEL
+               bool
+               prompt "Compile certain packages parallelized"
+               default n
+               help
+                 This adds a -jX option to certain packages that are known to
+                 behave well for parallel build.
+
+                 Note that this may overcommit CPU resources depending on the
+                 -j level of the main make process, the number of package
+                 submake jobs selected below and the number of actual CPUs present.
+                 Example: If the main make is passed a -j4 and the submake -j
+                 is also set to 4, we may end up with 16 parallel make processes
+                 in the worst case.
+
+                 You get maximum build performance, if you set the package build
+                 jobs to the number of CPUs (cores) available and also start the main
+                 make process with -jX, where X is the number of CPUs (cores).
+                 However, make sure you have enough RAM available for
+                 NR_CPUS to the power of two (NR_CPUS^2) make jobs.
+
+                 If you are unsure, select N.
+
+       config PKG_BUILD_JOBS
+               int
+               prompt "Number of package submake jobs (2-512)"
+               range 2 512
+               default 2
+               depends on PKG_BUILD_PARALLEL
+               help
+                 The number of jobs (-jX) to pass to packages submake.
+
+       config PKG_DEFAULT_PARALLEL
+               bool
+               prompt "Always parallelize the default package build rule (Dangerous)"
+               depends on PKG_BUILD_PARALLEL
+               default n
+               help
+                 Always set the default package build rules to parallel build.
+
+                 WARNING: This may break build or kill your cat, as it builds
+                 packages with multiple jobs that are probably not tested in
+                 a parallel build environment.
+
+                 Say N. Only say Y for testing.
+
        comment "Stripping options"
 
        choice