Further simplify the makefile, add partial clang compilation support (#…

…317)

Bench: 6097414

makefile

@@ -6,7 +6,7 @@ EVALFILE   = $(NETWORK_NAME)
 CXX       := g++
 TARGET    := Alexandria
 WARNINGS   = -Wall -Wcast-qual -Wextra -Wshadow -Wdouble-promotion -Wformat=2 -Wnull-dereference -Wlogical-op -Wold-style-cast -Wundef -pedantic
-CXXFLAGS  :=  -funroll-loops -O3 -flto  -fno-exceptions -std=gnu++2a  -DNDEBUG $(WARNINGS)
+CXXFLAGS  :=  -funroll-loops -O3 -flto -fno-exceptions -std=gnu++2a -DNDEBUG $(WARNINGS)
 NATIVE     = -march=native
 
 
@@ -15,6 +15,11 @@ NAME      := Alexandria
 
 TMPDIR = .tmp
 
+# Detect Clang
+ifeq ($(CXX), clang++)
+CXXFLAGS = -funroll-loops -O3 -flto -fuse-ld=lld -fno-exceptions -std=gnu++2a -DNDEBUG
+endif
+
 # Detect Windows
 ifeq ($(OS), Windows_NT)
 	MKDIR    := mkdir
@@ -31,8 +36,7 @@ endif
 ifeq ($(OS), Windows_NT)
 	uname_S := Windows
 	SUFFIX  := .exe
-	FLAGS    = -lstdc++
-	CXXFLAGS += -static -static-libgcc -static-libstdc++
+	CXXFLAGS += -static
 else
 	FLAGS   = -pthread
 	SUFFIX  :=

src/nnue.cpp

@@ -4,15 +4,15 @@
 #include <cstdio>
 #include <cstring>
 #include <iostream>
+#include "incbin/incbin.h"
+
 // Macro to embed the default efficiently updatable neural network (NNUE) file
 // data in the engine binary (using incbin.h, by Dale Weiler).
 // This macro invocation will declare the following three variables
 //     const unsigned char        gEVALData[];  // a pointer to the embedded data
 //     const unsigned char *const gEVALEnd;     // a marker to the end
 //     const unsigned int         gEVALSize;    // the size of the embedded file
 // Note that this does not work in Microsoft Visual Studio.
-#define INCBIN_STYLE INCBIN_STYLE_CAMEL
-#include "incbin/incbin.h"
 #if !defined(_MSC_VER)
 INCBIN(EVAL, EVALFILE);
 #else