From 356fd73a7b24fd5fdcc093639c12dfd60f35d681 Mon Sep 17 00:00:00 2001
From: Panu Matilainen <pmatilai@redhat.com>
Date: Wed, 22 Jan 2014 10:49:56 +0200
Subject: Make CPU limit for building configurable through _smp_ncpus_max macro

- Makes the max number of cpu's used by %{_smp_mflags} configurable
  on spec, user or system level.
- Originally reported as RhBug:669638 and included in redhat-rpm-config
  in RHEL/Fedora, but makes sense to have generally available.
---
 platform.in | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'platform.in')

diff --git a/platform.in b/platform.in
index 45c65a599..34ce787bf 100644
--- a/platform.in
+++ b/platform.in
@@ -47,9 +47,13 @@
 
 %_defaultdocdir		%{_datadir}/doc
 
+# Maximum number of CPU's to use when building, 0 for unlimited.
+#%_smp_ncpus_max 0
 %_smp_mflags %([ -z "$RPM_BUILD_NCPUS" ] \\\
 	&& RPM_BUILD_NCPUS="`/usr/bin/getconf _NPROCESSORS_ONLN`"; \\\
-	[ "$RPM_BUILD_NCPUS" -gt 1 ] && echo "-j$RPM_BUILD_NCPUS")
+        ncpus_max=%{?_smp_ncpus_max}; \\\
+        if [ -n "$ncpus_max" ] && [ "$ncpus_max" -gt 0 ] && [ "$RPM_BUILD_NCPUS" -gt "$ncpus_max" ]; then RPM_BUILD_NCPUS="$ncpus_max"; fi; \\\
+        if [ "$RPM_BUILD_NCPUS" -gt 1 ]; then echo "-j$RPM_BUILD_NCPUS"; fi)
 
 #==============================================================================
 # ---- Build policy macros.
-- 
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