Slightly microptimize SEE

[stockfish] / src / Makefile

diff --git a/src/Makefile b/src/Makefile
index eba72150b614a69de499436d1618bce74cad786b..3fd601ffe20c96cee61c94c1ab9ec5e2a8aa2078 100644 (file)
--- a/src/Makefile
+++ b/src/Makefile
@@ -20,11 +20,18 @@
 ### Section 1. General Configuration
 ### ==========================================================================
 
+### Establish the operating system name
+UNAME = $(shell uname)
+
 ### Executable name
 EXE = stockfish
 
 ### Installation dir definitions
 PREFIX = /usr/local
+# Haiku has a non-standard filesystem layout
+ifeq ($(UNAME),Haiku)
+       PREFIX=/boot/common
+endif
 BINDIR = $(PREFIX)/bin
 
 ### Built-in benchmark for pgo-builds
@@ -32,7 +39,7 @@ PGOBENCH = ./$(EXE) bench 32 1 10 default depth
 
 ### Object files
 OBJS = benchmark.o bitbase.o bitboard.o book.o endgame.o evaluate.o main.o \
-       material.o misc.o move.o movegen.o movepick.o pawns.o position.o \
+       material.o misc.o movegen.o movepick.o notation.o pawns.o position.o \
        search.o thread.o timeman.o tt.o uci.o ucioption.o
 
 ### ==========================================================================
@@ -192,6 +199,15 @@ ifeq ($(COMP),icc)
        profile_clean = icc-profile-clean
 endif
 
+ifeq ($(COMP),clang)
+       comp=clang
+       CXX=clang++
+       profile_prepare = gcc-profile-prepare
+       profile_make = gcc-profile-make
+       profile_use = gcc-profile-use
+       profile_clean = gcc-profile-clean
+endif
+
 ### 3.2 General compiler settings
 CXXFLAGS = -g -Wall -Wcast-qual -fno-exceptions -fno-rtti $(EXTRACXXFLAGS)
 
@@ -207,6 +223,10 @@ ifeq ($(comp),icc)
        CXXFLAGS += -wd383,981,1418,1419,10187,10188,11505,11503 -Wcheck -Wabi -Wdeprecated -strict-ansi
 endif
 
+ifeq ($(comp),clang)
+       CXXFLAGS += -ansi -pedantic -Wno-long-long -Wextra -Wshadow
+endif
+
 ifeq ($(os),osx)
        CXXFLAGS += -arch $(arch)
 endif
@@ -216,7 +236,10 @@ LDFLAGS = $(EXTRALDFLAGS)
 
 ### On mingw use Windows threads, otherwise POSIX
 ifneq ($(comp),mingw)
-       LDFLAGS += -lpthread
+       # Haiku has pthreads in its libroot, so only link it in on other platforms
+       ifneq ($(UNAME),Haiku)
+               LDFLAGS += -lpthread
+       endif
 endif
 
 ifeq ($(os),osx)
@@ -255,6 +278,20 @@ ifeq ($(optimize),yes)
                        CXXFLAGS += -O3
                endif
        endif
+
+       ifeq ($(comp),clang)
+               ### -O4 requires a linker that supports LLVM's LTO
+               CXXFLAGS += -O3
+
+               ifeq ($(os),osx)
+                       ifeq ($(arch),i386)
+                               CXXFLAGS += -mdynamic-no-pic
+                       endif
+                       ifeq ($(arch),x86_64)
+                               CXXFLAGS += -mdynamic-no-pic
+                       endif
+               endif
+       endif
 endif
 
 ### 3.6. Bits
@@ -329,6 +366,7 @@ help:
        @echo "gcc                  > Gnu compiler (default)"
        @echo "icc                  > Intel compiler"
        @echo "mingw                > Gnu compiler with MinGW under Windows"
+       @echo "clang                > LLVM Clang compiler"
        @echo ""
        @echo "Non-standard targets:"
        @echo ""
@@ -415,7 +453,7 @@ config-sanity:
        @test "$(prefetch)" = "yes" || test "$(prefetch)" = "no"
        @test "$(bsfq)" = "yes" || test "$(bsfq)" = "no"
        @test "$(popcnt)" = "yes" || test "$(popcnt)" = "no"
-       @test "$(comp)" = "gcc" || test "$(comp)" = "icc" || test "$(comp)" = "mingw"
+       @test "$(comp)" = "gcc" || test "$(comp)" = "icc" || test "$(comp)" = "mingw" || test "$(comp)" = "clang"
 
 $(EXE): $(OBJS)
        $(CXX) -o $@ $(OBJS) $(LDFLAGS)