+### ==========================================================================
+### Section 2. High-level Configuration
+### ==========================================================================
+#
+# flag --- Comp switch --- Description
+# ----------------------------------------------------------------------------
+#
+# debug = yes/no --- -DNDEBUG --- Enable/Disable debug mode
+# optimize = yes/no --- (-O3/-fast etc.) --- Enable/Disable optimizations
+# arch = (name) --- (-arch) --- Target architecture
+# os = (name) --- --- Target operating system
+# bits = 64/32 --- -DIS_64BIT --- 64-/32-bit operating system
+# prefetch = yes/no --- -DUSE_PREFETCH --- Use prefetch x86 asm-instruction
+# bsfq = yes/no --- -DUSE_BSFQ --- Use bsfq x86_64 asm-instruction (only
+# with GCC and ICC 64-bit)
+# popcnt = yes/no --- -DUSE_POPCNT --- Use popcnt x86_64 asm-instruction
+#
+# Note that Makefile is space sensitive, so when adding new architectures
+# or modifying existing flags, you have to make sure there are no extra spaces
+# at the end of the line for flag values.
+
+### 2.1. General
+debug = no
+optimize = yes
+
+### 2.2 Architecture specific
+
+# General-section
+ifeq ($(ARCH),general-64)
+ arch = any
+ os = any
+ bits = 64
+ prefetch = no
+ bsfq = no
+ popcnt = no
+endif
+
+ifeq ($(ARCH),general-32)
+ arch = any
+ os = any
+ bits = 32
+ prefetch = no
+ bsfq = no
+ popcnt = no
+endif
+
+# x86-section
+ifeq ($(ARCH),x86-64)
+ arch = x86_64
+ os = any
+ bits = 64
+ prefetch = yes
+ bsfq = yes
+ popcnt = no
+endif
+
+ifeq ($(ARCH),x86-64-modern)
+ arch = x86_64
+ os = any
+ bits = 64
+ prefetch = yes
+ bsfq = yes
+ popcnt = yes
+endif
+
+ifeq ($(ARCH),x86-32)
+ arch = i386
+ os = any
+ bits = 32
+ prefetch = yes
+ bsfq = no
+ popcnt = no
+endif
+
+ifeq ($(ARCH),x86-32-old)
+ arch = i386
+ os = any
+ bits = 32
+ prefetch = no
+ bsfq = no
+ popcnt = no
+endif
+
+# osx-section
+ifeq ($(ARCH),osx-ppc-64)
+ arch = ppc64
+ os = osx
+ bits = 64
+ prefetch = no
+ bsfq = no
+ popcnt = no
+endif
+
+ifeq ($(ARCH),osx-ppc-32)
+ arch = ppc
+ os = osx
+ bits = 32
+ prefetch = no
+ bsfq = no
+ popcnt = no
+endif
+
+ifeq ($(ARCH),osx-x86-64)
+ arch = x86_64
+ os = osx
+ bits = 64
+ prefetch = yes
+ bsfq = yes
+ popcnt = no
+endif
+
+ifeq ($(ARCH),osx-x86-32)
+ arch = i386
+ os = osx
+ bits = 32
+ prefetch = yes
+ bsfq = no
+ popcnt = no
+endif
+
+
+### ==========================================================================
+### Section 3. Low-level configuration
+### ==========================================================================
+
+### 3.1 Selecting compiler (default = gcc)
+ifeq ($(COMP),)
+ COMP=gcc
+endif
+
+ifeq ($(COMP),mingw)
+ comp=mingw
+ CXX=g++
+ profile_prepare = gcc-profile-prepare
+ profile_make = gcc-profile-make
+ profile_use = gcc-profile-use
+ profile_clean = gcc-profile-clean
+endif
+
+ifeq ($(COMP),gcc)
+ comp=gcc
+ CXX=g++
+ profile_prepare = gcc-profile-prepare
+ profile_make = gcc-profile-make
+ profile_use = gcc-profile-use
+ profile_clean = gcc-profile-clean
+endif
+
+ifeq ($(COMP),icc)
+ comp=icc
+ CXX=icpc
+ profile_prepare = icc-profile-prepare
+ profile_make = icc-profile-make
+ profile_use = icc-profile-use
+ profile_clean = icc-profile-clean
+endif
+
+### 3.2 General compiler settings
+CXXFLAGS = -g -Wall -Wcast-qual -fno-exceptions -fno-rtti $(EXTRACXXFLAGS)
+
+ifeq ($(comp),gcc)
+ CXXFLAGS += -ansi -pedantic -Wno-long-long -Wextra -Wshadow
+endif
+
+ifeq ($(comp),mingw)
+ CXXFLAGS += -Wextra -Wshadow
+endif
+
+ifeq ($(comp),icc)
+ CXXFLAGS += -wd383,981,1418,1419,10187,10188,11505,11503 -Wcheck -Wabi -Wdeprecated -strict-ansi
+endif
+
+ifeq ($(os),osx)
+ CXXFLAGS += -arch $(arch)
+endif
+
+### 3.3 General linker settings
+LDFLAGS = $(EXTRALDFLAGS)
+
+### On mingw use Windows threads, otherwise POSIX
+ifneq ($(comp),mingw)
+ LDFLAGS += -lpthread
+endif
+
+ifeq ($(os),osx)
+ LDFLAGS += -arch $(arch)
+endif
+
+### 3.4 Debugging
+ifeq ($(debug),no)
+ CXXFLAGS += -DNDEBUG
+endif
+
+### 3.5 Optimization
+ifeq ($(optimize),yes)
+
+ ifeq ($(comp),gcc)
+ CXXFLAGS += -O3
+
+ ifeq ($(os),osx)
+ ifeq ($(arch),i386)
+ CXXFLAGS += -mdynamic-no-pic
+ endif
+ ifeq ($(arch),x86_64)
+ CXXFLAGS += -mdynamic-no-pic
+ endif
+ endif
+ endif
+
+ ifeq ($(comp),mingw)
+ CXXFLAGS += -O3
+ endif
+
+ ifeq ($(comp),icc)
+ ifeq ($(os),osx)
+ CXXFLAGS += -fast -mdynamic-no-pic
+ else
+ CXXFLAGS += -O3
+ endif
+ endif
+endif
+
+### 3.6. Bits
+ifeq ($(bits),64)
+ CXXFLAGS += -DIS_64BIT
+endif
+
+### 3.7 prefetch
+ifeq ($(prefetch),yes)
+ CXXFLAGS += -msse
+ DEPENDFLAGS += -msse
+else
+ CXXFLAGS += -DNO_PREFETCH
+endif
+
+### 3.8 bsfq
+ifeq ($(bsfq),yes)
+ CXXFLAGS += -DUSE_BSFQ
+endif
+
+### 3.9 popcnt
+ifeq ($(popcnt),yes)
+ CXXFLAGS += -msse3 -DUSE_POPCNT
+endif
+
+### 3.10 Link Time Optimization, it works since gcc 4.5 but not on mingw.
+### This is a mix of compile and link time options because the lto link phase
+### needs access to the optimization flags.
+ifeq ($(comp),gcc)
+ GCC_MAJOR := `$(CXX) -dumpversion | cut -f1 -d.`
+ GCC_MINOR := `$(CXX) -dumpversion | cut -f2 -d.`
+ ifeq (1,$(shell expr \( $(GCC_MAJOR) \> 4 \) \| \( $(GCC_MAJOR) \= 4 \& $(GCC_MINOR) \>= 5 \)))
+ CXXFLAGS += -flto
+ LDFLAGS += $(CXXFLAGS)
+ endif
+endif
+
+### ==========================================================================
+### Section 4. Public targets
+### ==========================================================================
+
+help:
+ @echo ""
+ @echo "To compile stockfish, type: "
+ @echo ""
+ @echo "make target ARCH=arch [COMP=comp]"
+ @echo ""
+ @echo "Supported targets:"
+ @echo ""
+ @echo "build > Build unoptimized version"
+ @echo "profile-build > Build PGO-optimized version"
+ @echo "strip > Strip executable"
+ @echo "install > Install executable"
+ @echo "clean > Clean up"
+ @echo "testrun > Make sample run"
+ @echo ""
+ @echo "Supported archs:"
+ @echo ""
+ @echo "x86-64 > x86 64-bit"
+ @echo "x86-64-modern > x86 64-bit with runtime support for popcnt instruction"
+ @echo "x86-32 > x86 32-bit excluding old hardware without SSE-support"
+ @echo "x86-32-old > x86 32-bit including also very old hardware"
+ @echo "osx-ppc-64 > PPC-Mac OS X 64 bit"
+ @echo "osx-ppc-32 > PPC-Mac OS X 32 bit"
+ @echo "osx-x86-64 > x86-Mac OS X 64 bit"
+ @echo "osx-x86-32 > x86-Mac OS X 32 bit"
+ @echo "general-64 > unspecified 64-bit"
+ @echo "general-32 > unspecified 32-bit"
+ @echo ""
+ @echo "Supported comps:"
+ @echo ""
+ @echo "gcc > Gnu compiler (default)"
+ @echo "icc > Intel compiler"
+ @echo "mingw > Gnu compiler with MinGW under Windows"
+ @echo ""
+ @echo "Non-standard targets:"
+ @echo ""
+ @echo "make hpux > Compile for HP-UX. Compiler = aCC"
+ @echo ""
+ @echo "Examples. If you don't know what to do, you likely want to run: "
+ @echo ""
+ @echo "make profile-build ARCH=x86-64 (This is for 64-bit systems)"
+ @echo "make profile-build ARCH=x86-32 (This is for 32-bit systems)"
+ @echo ""
+
+build:
+ $(MAKE) ARCH=$(ARCH) COMP=$(COMP) config-sanity
+ $(MAKE) ARCH=$(ARCH) COMP=$(COMP) all
+
+profile-build:
+ $(MAKE) ARCH=$(ARCH) COMP=$(COMP) config-sanity
+ @echo ""
+ @echo "Step 0/4. Preparing for profile build."
+ $(MAKE) ARCH=$(ARCH) COMP=$(COMP) $(profile_prepare)
+ @echo ""
+ @echo "Step 1/4. Building executable for benchmark ..."
+ @touch *.cpp *.h
+ $(MAKE) ARCH=$(ARCH) COMP=$(COMP) $(profile_make)
+ @echo ""
+ @echo "Step 2/4. Running benchmark for pgo-build ..."
+ @$(PGOBENCH) > /dev/null
+ @echo ""
+ @echo "Step 3/4. Building final executable ..."
+ @touch *.cpp
+ $(MAKE) ARCH=$(ARCH) COMP=$(COMP) $(profile_use)
+ @echo ""
+ @echo "Step 4/4. Deleting profile data ..."
+ $(MAKE) ARCH=$(ARCH) COMP=$(COMP) $(profile_clean)
+
+strip:
+ strip $(EXE)
+
+install:
+ -mkdir -p -m 755 $(BINDIR)
+ -cp $(EXE) $(BINDIR)
+ -strip $(BINDIR)/$(EXE)