Makefile: Allow specifying compiler executable

No functional change

Resolves #570

diff --git a/src/Makefile b/src/Makefile
index d2d95f3974154648c4e00e8a940c469d0dd0aed3..054fea001bf23d8fc1039058458ac6a256efd104 100644 (file)
--- a/src/Makefile
+++ b/src/Makefile
@@ -218,7 +218,12 @@ endif
 
 ### Travis CI script uses COMPILER to overwrite CXX
 ifdef COMPILER
-       CXX=$(COMPILER)
+       COMPCXX=$(COMPILER)
+endif
+
+### Allow overwriting CXX from command line
+ifdef COMPCXX
+       CXX=$(COMPCXX)
 endif
 
 ### On mingw use Windows threads, otherwise POSIX
@@ -365,7 +370,7 @@ help:
        @echo ""
        @echo "To compile stockfish, type: "
        @echo ""
-       @echo "make target ARCH=arch [COMP=comp]"
+       @echo "make target ARCH=arch [COMP=compiler] [COMPCXX=cxx]"
        @echo ""
        @echo "Supported targets:"
        @echo ""
@@ -395,11 +400,17 @@ help:
        @echo "clang                   > LLVM Clang compiler"
        @echo "icc                     > Intel compiler"
        @echo ""
-       @echo "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: "
        @echo ""
        @echo "make build ARCH=x86-64    (This is for 64-bit systems)"
        @echo "make build ARCH=x86-32    (This is for 32-bit systems)"
        @echo ""
+       @echo "Advanced examples, for experienced users: "
+       @echo ""
+       @echo "make build ARCH=x86-64 COMP=clang"
+       @echo "make profile-build ARCH=x86-64-modern COMP=gcc COMPCXX=g++-4.8"
+       @echo ""
+
 
 .PHONY: build profile-build
 build: