Detect JOBS in a more portable way

Author: saghul

.github/workflows/ci.yml

@@ -385,11 +385,10 @@ jobs:
         with:
           usesh: true
           prepare: |
-            pkg_add cmake
+            pkg_add cmake gmake
           run: |
-            cmake -B build
-            cmake --build build -j $(sysctl -n hw.ncpu)
-            ./build/qjs -qd
+            gmake
+            gmake stats
 
   freebsd:
     runs-on: ubuntu-latest
@@ -400,8 +399,7 @@ jobs:
         with:
           usesh: true
           prepare: |
-            pkg install -y cmake
+            pkg install -y cmake gmake
           run: |
-            cmake -B build
-            cmake --build build -j $(sysctl -n hw.ncpu)
-            ./build/qjs -qd
+            gmake
+            gmake stats

Makefile

@@ -26,11 +26,20 @@
 
 BUILD_DIR=build
 BUILD_TYPE?=Release
-JOBS?=$(shell getconf _NPROCESSORS_ONLN)
 
 QJS=$(BUILD_DIR)/qjs
 RUN262=$(BUILD_DIR)/run-test262
 
+JOBS?=$(shell getconf _NPROCESSORS_ONLN)
+ifeq ($(JOBS),)
+JOBS := $(shell sysctl -n hw.ncpu)
+endif
+ifeq ($(JOBS),)
+JOBS := $(shell nproc)
+endif
+ifeq ($(JOBS),)
+JOBS := 4
+endif
 
 all: $(QJS)