X-Git-Url: http://git.ipfire.org/?p=ipfire-2.x.git;a=blobdiff_plain;f=tools%2Fmake-functions;h=b7e957e1856bc65c4ef4c91dff11686b7a76bf77;hp=508f5f21eed358d1dad239165270eb9668a49fc8;hb=32e6d3e320bb21845f1cfaec4b0a23cf390250bd;hpb=65ca3f05075a11e2bce7daef5980f9bb4715ae84

diff --git a/tools/make-functions b/tools/make-functions
index 508f5f21ee..b7e957e185 100644
--- a/tools/make-functions
+++ b/tools/make-functions
@@ -60,6 +60,24 @@ WARN="\\033[1;35m"
 FAIL="\\033[1;31m"
 NORMAL="\\033[0;39m"
 
+system_processors() {
+	getconf _NPROCESSORS_ONLN 2>/dev/null || echo "1"
+}
+
+system_memory() {
+	local key val unit
+
+	while read -r key val unit; do
+		case "${key}" in
+			MemTotal:*)
+				# Convert to MB
+				echo "$(( ${val} / 1024 ))"
+				break
+				;;
+		esac
+	done < /proc/meminfo
+}
+
 configure_build() {
 	local build_arch="${1}"
 
@@ -126,6 +144,26 @@ configure_build() {
 
 	CFLAGS="-O2 -pipe -Wall -fexceptions -fPIC ${CFLAGS_ARCH}"
 	CXXFLAGS="${CFLAGS}"
+
+	# Determine parallelism
+	if [ -z "${MAKETUNING}" ]; then
+		# We assume that each process consumes about
+		# 192MB of memory. Therefore we find out how
+		# many processes fit into memory.
+		local mem_max=$(( ${HOST_MEM} / 192 ))
+
+		local processors="$(system_processors)"
+		local cpu_max=$(( ${processors} * 2 ))
+
+		local parallelism
+		if [ ${mem_max} -lt ${cpu_max} ]; then
+			parallelism=${mem_max}
+		else
+			parallelism=${cpu_max}
+		fi
+
+		MAKETUNING="-j${parallelism}"
+	fi
 }
 
 configure_build_guess() {
@@ -612,6 +650,7 @@ lfsmake1() {
 		CCACHE_COMPILERCHECK="${CCACHE_COMPILERCHECK}" \
 		CFLAGS="${CFLAGS}" \
 		CXXFLAGS="${CXXFLAGS}" \
+		MAKETUNING="${MAKETUNING}" \
 		make -f $* \
 			TOOLCHAIN=1 \
 			CROSSTARGET="${CROSSTARGET}" \
@@ -621,7 +660,6 @@ lfsmake1() {
 			LFS_BASEDIR="${BASEDIR}" \
 			ROOT="${LFS}" \
 			KVER="${KVER}" \
-			MAKETUNING="${MAKETUNING}" \
 			install >> $LOGFILE 2>&1
 
 	local COMPILE_SUCCESS=$?
@@ -645,8 +683,9 @@ lfsmake2() {
 	local PS1='\u:\w$ '
 
 	enterchroot \
-		bash -x -c "cd /usr/src/lfs && make -f $* \
+		bash -x -c "cd /usr/src/lfs && \
 			MAKETUNING=${MAKETUNING} \
+			make -f $* \
 			LFS_BASEDIR=/usr/src install" \
 		>> ${LOGFILE} 2>&1