[git.ipfire.org] IPFire 2.x development tree branch, next, updated. 212f17c1145bb6978b4797eb9c805f603ecb1f29

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- Log -----------------------------------------------------------------
commit 212f17c1145bb6978b4797eb9c805f603ecb1f29
Author: Michael Tremer <michael.tremer(a)ipfire.org>
Date:   Wed May 23 12:03:06 2018 +0100

    make.sh: Refactor XZ compression parameters again
    
    I completely ruined this now and therefore I had to make
    it new again:
    
    * I split the parameters into smaller chunks now and added
      comments about why we have chosen those.
    
    * I move it all to configure_build() since we do not need
      to check if the host architecture is 64 bit capable, but
      the architecture we are building for.
    
    Signed-off-by: Michael Tremer <michael.tremer(a)ipfire.org>

-----------------------------------------------------------------------

Summary of changes:
 make.sh | 38 ++++++++++++++++++++++++--------------
 1 file changed, 24 insertions(+), 14 deletions(-)

Difference in files:
diff --git a/make.sh b/make.sh
index 703ce0c48..070271658 100755
--- a/make.sh
+++ b/make.sh
@@ -225,6 +225,30 @@ configure_build() {
 
 		MAKETUNING="-j${parallelism}"
 	fi
+
+	# Compression parameters
+	# We use mode 8 for reasonable memory usage when decompressing
+	# but with overall good compression
+	XZ_OPT="-8"
+
+	# We try to use as many cores as possible
+	XZ_OPT="${XZ_OPT} -T0"
+
+	# We need to limit memory because XZ uses too much when running
+	# in parallel and it isn't very smart in limiting itself.
+	# We allow XZ to use up to 70% of all system memory.
+	local xz_memory=$(( HOST_MEM * 7 / 10 ))
+
+	# XZ memory cannot be larger than 2GB on 32 bit systems
+	case "${build_arch}" in
+		i*86|armv*)
+			if [ ${xz_memory} -gt 2048 ]; then
+				xz_memory=2048
+			fi
+			;;
+	esac
+
+	XZ_OPT="${XZ_OPT} --memory=${xz_memory}MiB"
 }
 
 configure_build_guess() {
@@ -861,20 +885,6 @@ fi
 # Get the amount of memory in this build system
 HOST_MEM=$(system_memory)
 
-# We compress archives with "xz -8", using all cores and up to 70% of memory
-XZ_MEM=$(( HOST_MEM * 7 / 10 ))
-
-# XZ memory cannot be larger than 2GB on 32 bit systems
-case "${HOST_ARCH}" in
-	i*86|armv*)
-		if [ ${XZ_MEM} -gt 2048 ]; then
-			XZ_MEM=2048
-		fi
-		;;
-esac
-
-XZ_OPT="-T0 -8 --memory=${XZ_MEM}MiB"
-
 if [ -n "${BUILD_ARCH}" ]; then
 	configure_build "${BUILD_ARCH}"
 else


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