From d4cc10bc9471cf69b26e171421e8e13a91d79f72 Mon Sep 17 00:00:00 2001
From: Sylvestre Ledru <sylvestre@debian.org>
Date: Fri, 20 Sep 2024 13:24:21 +0200
Subject: [PATCH] Ensure that at least 1 CPU is used for build Thanks to
 Santiago Vila for the patch (Closes: #1082360)

---
 debian/changelog | 3 +++
 debian/rules     | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/debian/changelog b/debian/changelog
index 02428a2a..12efc0e9 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -3,6 +3,9 @@ llvm-toolchain-19 (1:19.1.0-4) UNRELEASED; urgency=medium
   [ Sylvestre Ledru ]
   * Adjust the workaround for apt.llvm.org version upgrades
     https://github.com/llvm/llvm-project/issues/109276
+  * Ensure that at least 1 CPU is used for build
+    Thanks to Santiago Vila for the patch
+    (Closes: #1082360)
 
   [ Matthias Klose ]
   * Don't relax versioned shlibs dependencies for snapshot builds and
diff --git a/debian/rules b/debian/rules
index 843e8b9e..8736d61f 100755
--- a/debian/rules
+++ b/debian/rules
@@ -84,7 +84,7 @@ else
 endif
 NJOBS := $(shell mt=`awk '/^(MemAvail|SwapFree)/ { mt += $$2 } END {print mt}' /proc/meminfo`; \
 		awk -vn=$(NCPUS) -vmt=$$mt -vm=$(MEM_PER_CPU) \
-		  'END { mt/=1024; n2 = int(mt/m); print n==1 ? 1 : n2<n+1 ? n2 : n+1}' < /dev/null)
+		  'END { mt/=1024; n2 = int(mt/m); print n==1 || n2<=1 ? 1 : n2<=n ? n2 : n }' < /dev/null)
 
 TIME_COMMAND = $(CURDIR)/debian/usage-wrapper.py $(SUMMARY_ONLY) -j $(NJOBS) --base-memory -m 4.0 -o usage-$(notdir $@)-$(DEB_HOST_ARCH).svg
 TIME_BIN := $(if $(wildcard /usr/bin/time),/usr/bin/time,/bin/time)