Fix for Cygwin's environment build-profile

The Cygwin environment has two g++ compilers, each with a different problem
for compiling  Stockfish at the moment:

(a) g++.exe : full posix build compiler, linked to cygwin dll.

    => This one has a problem embedding the net.

(b) x86_64-w64-mingw32-g++.exe : native Windows build compiler.

    => This one manages to embed the net, but has a problem related to libgcov
       when we use the profile-build target of Stockfish.

This patch solves the problem for compiler (b), so that our recommended command line
if you want to build an optimized version of Stockfish on Cygwin becomes something
like the following (you can change the ARCH value to whatever you want, but note
the COMP and CXX variables pointing at the right compiler):

```
   make -j profile-build ARCH=x86-64-modern COMP=mingw CXX=x86_64-w64-mingw32-c++.exe
```

closes https://github.com/official-stockfish/Stockfish/pull/3463

No functional change

diff --git a/AUTHORS b/AUTHORS
index 7e63591a3b8c8632cc6e82303067873aa0910f50..1334844fc6b6de700b1a76f9b12c2d69f9280578 100644 (file)
--- a/AUTHORS
+++ b/AUTHORS
@@ -23,6 +23,7 @@ Alfredo Menezes (lonfom169)
 Ali AlZhrani (Cooffe)
 Andrew Grant (AndyGrant)
 Andrey Neporada (nepal)
+Andreï Vetrov (proukornew)
 Andy Duplain
 Antoine Champion (antoinechampion)
 Aram Tumanian (atumanian)

diff --git a/src/Makefile b/src/Makefile
index 33a270fe19f3c276272b31c3566836d147902210..9508e18be46400df77e7e4c4453975741c444b1f 100644 (file)
--- a/src/Makefile
+++ b/src/Makefile
@@ -884,13 +884,13 @@ clang-profile-use:
 
 gcc-profile-make:
        $(MAKE) ARCH=$(ARCH) COMP=$(COMP) \
-       EXTRACXXFLAGS='-fprofile-generate' \
+       EXTRACXXFLAGS='-fprofile-generate="./"' \
        EXTRALDFLAGS='-lgcov' \
        all
 
 gcc-profile-use:
        $(MAKE) ARCH=$(ARCH) COMP=$(COMP) \
-       EXTRACXXFLAGS='-fprofile-use -fno-peel-loops -fno-tracer' \
+       EXTRACXXFLAGS='-fprofile-use="./" -fno-peel-loops -fno-tracer' \
        EXTRALDFLAGS='-lgcov' \
        all