Fixed the help of Makefile

[stockfish] / src / Makefile

diff --git a/src/Makefile b/src/Makefile
index 917bd5c06c7a83f9d4c48f9a531df196b0cb2d9d..da81ceb4a0e0f5f3ac0b365679dee6818c4bd8b0 100644 (file)
--- a/src/Makefile
+++ b/src/Makefile
@@ -512,7 +512,7 @@ endif
 
 ### Sometimes gcc is really clang
 ifeq ($(COMP),gcc)
-       gccversion = $(shell $(CXX) --version)
+       gccversion = $(shell $(CXX) --version 2>/dev/null)
        gccisclang = $(findstring clang,$(gccversion))
        ifneq ($(gccisclang),)
                profile_make = clang-profile-make
@@ -747,9 +747,9 @@ help:
        @echo "Supported targets:"
        @echo ""
        @echo "help                    > Display architecture details"
-       @echo "build                   > Standard build"
+       @echo "profile-build           > standard build with profile-guided optimization"
+       @echo "build                   > skip profile-guided optimization"
        @echo "net                     > Download the default nnue net"
-       @echo "profile-build           > Faster build (with profile-guided optimization)"
        @echo "strip                   > Strip executable"
        @echo "install                 > Install executable"
        @echo "clean                   > Clean up"
@@ -789,14 +789,15 @@ help:
        @echo "icc                     > Intel compiler"
        @echo "ndk                     > Google NDK to cross-compile for Android"
        @echo ""
-       @echo "Simple examples. If you don't know what to do, you likely want to run: "
+       @echo "Simple examples. If you don't know what to do, you likely want to run one of: "
        @echo ""
-       @echo "make -j build ARCH=x86-64  (A portable, slow compile for 64-bit systems)"
-       @echo "make -j build ARCH=x86-32  (A portable, slow compile for 32-bit systems)"
+       @echo "make -j profile-build ARCH=x86-64-avx2    # typically a fast compile for common systems "
+       @echo "make -j profile-build ARCH=x86-64-modern  # A more portable compile for 64-bit systems "
+       @echo "make -j profile-build ARCH=x86-64         # A portable compile for 64-bit systems "
        @echo ""
-       @echo "Advanced examples, for experienced users looking for performance: "
+       @echo "Advanced examples, for experienced users: "
        @echo ""
-       @echo "make    help  ARCH=x86-64-bmi2"
+       @echo "make -j profile-build ARCH=x86-64-bmi2"
        @echo "make -j profile-build ARCH=x86-64-bmi2 COMP=gcc COMPCXX=g++-9.0"
        @echo "make -j build ARCH=x86-64-ssse3 COMP=clang"
        @echo ""
@@ -1006,4 +1007,6 @@ icc-profile-use:
 .depend: $(SRCS)
        -@$(CXX) $(DEPENDFLAGS) -MM $(SRCS) > $@ 2> /dev/null
 
+ifneq (, $(filter $(MAKECMDGOALS), build profile-build))
 -include .depend
+endif