Makefile example command lines updated.

Author: Maxim Egorushkin

Makefile

@@ -2,15 +2,17 @@
 
 # Usage examples (assuming this directory is ~/src/atomic_queue):
 #
-#   time make -rC ~/src/atomic_queue -j8
-#   time make -rC ~/src/atomic_queue -j8 run_benchmarks
-#   time make -rC ~/src/atomic_queue -j8 TOOLSET=clang run_benchmarks
-#   time make -rC ~/src/atomic_queue -j8 BUILD=debug run_tests
-#   time make -rC ~/src/atomic_queue -j8 BUILD=sanitize TOOLSET=clang run_tests
+#   time make -rC ~/src/atomic_queue -j$(($(nproc)/2))
+#   time make -rC ~/src/atomic_queue -j$(($(nproc)/2)) BUILD=debug run_tests
+#   time make -rC ~/src/atomic_queue -j$(($(nproc)/2)) all run_tests
+#   time make -rC ~/src/atomic_queue -j$(($(nproc)/2)) run_benchmarks
+#   time make -rC ~/src/atomic_queue -j$(($(nproc)/2)) TOOLSET=clang-19 BUILD=debug run_tests
+#   time make -rC ~/src/atomic_queue -j$(($(nproc)/2)) TOOLSET=clang BUILD=sanitize run_tests
+#   time make -rC ~/src/atomic_queue -j$(($(nproc)/2)) TOOLSET=clang run_benchmarks
 #
 # Additional CPPFLAGS, CXXFLAGS, LDLIBS, LDFLAGS can come from the command line, e.g. make CPPFLAGS='-I<my-include-dir>', or from environment variables.  For example, also produce assembly outputs:
 #
-#   time make -rC ~/src/atomic_queue -j8 CXXFLAGS="-save-temps=obj -fverbose-asm -masm=intel"
+#   time make -rC ~/src/atomic_queue -j$(($(nproc)/2)) CXXFLAGS="-save-temps=obj -fverbose-asm -masm=intel"
 #
 
 SHELL := /bin/bash