From 18046703d5e9079310e4e5735c19310c5c87b84e Mon Sep 17 00:00:00 2001
From: MITSUNARI Shigeo <herumi@nifty.com>
Date: Mon, 30 Jul 2018 16:18:37 +0900
Subject: [PATCH] support go on mingw

---
 Makefile          | 30 +++++++++++++++++++++---------
 ffi/go/mcl/mcl.go |  8 ++++++--
 2 files changed, 27 insertions(+), 11 deletions(-)

diff --git a/Makefile b/Makefile
index 6c0d9eb..7a5e43a 100644
--- a/Makefile
+++ b/Makefile
@@ -113,11 +113,23 @@ else
   ASM_BMI2_SRC_DEP=
 endif
 
+ifneq ($(findstring $(OS),mac/mingw64),)
+  BN256_SLIB_LDFLAGS+=-l$(MCL_SNAME) -L./lib
+  BN384_SLIB_LDFLAGS+=-l$(MCL_SNAME) -L./lib
+  BN512_SLIB_LDFLAGS+=-l$(MCL_SNAME) -L./lib
+endif
+ifeq ($(OS),mingw64)
+  MCL_SLIB_LDFLAGS+=-Wl,--out-implib,$(LIB_DIR)/lib$(MCL_SNAME).a
+  BN256_SLIB_LDFLAGS+=-Wl,--out-implib,$(LIB_DIR)/lib$(BN256_SNAME).a
+  BN384_SLIB_LDFLAGS+=-Wl,--out-implib,$(LIB_DIR)/lib$(BN384_SNAME).a
+  BN512_SLIB_LDFLAGS+=-Wl,--out-implib,$(LIB_DIR)/lib$(BN512_SNAME).a
+endif
+
 $(MCL_LIB): $(LIB_OBJ)
 	$(AR) $@ $(LIB_OBJ)
 
 $(MCL_SLIB): $(LIB_OBJ)
-	$(PRE)$(CXX) -o $@ $(LIB_OBJ) -shared $(LDFLAGS)
+	$(PRE)$(CXX) -o $@ $(LIB_OBJ) -shared $(LDFLAGS) $(MCL_SLIB_LDFLAGS)
 
 $(BN256_LIB): $(BN256_OBJ)
 	$(AR) $@ $(BN256_OBJ)
@@ -131,11 +143,8 @@ $(SHE384_LIB): $(SHE384_OBJ)
 $(ECDSA_LIB): $(ECDSA_OBJ)
 	$(AR) $@ $(ECDSA_OBJ)
 
-ifeq ($(OS),mac)
-  MAC_LDFLAGS+=-l$(MCL_SNAME) -L./lib
-endif
 $(BN256_SLIB): $(BN256_OBJ) $(MCL_SLIB)
-	$(PRE)$(CXX) -o $@ $(BN256_OBJ) -shared $(LDFLAGS) $(MAC_LDFLAGS)
+	$(PRE)$(CXX) -o $@ $(BN256_OBJ) -shared $(LDFLAGS) $(BN256_SLIB_LDFLAGS)
 
 $(BN384_LIB): $(BN384_OBJ)
 	$(AR) $@ $(BN384_OBJ)
@@ -144,10 +153,10 @@ $(BN512_LIB): $(BN512_OBJ)
 	$(AR) $@ $(BN512_OBJ)
 
 $(BN384_SLIB): $(BN384_OBJ) $(MCL_SLIB)
-	$(PRE)$(CXX) -o $@ $(BN384_OBJ) -shared $(LDFLAGS) $(MAC_LDFLAGS)
+	$(PRE)$(CXX) -o $@ $(BN384_OBJ) -shared $(LDFLAGS) $(BN384_SLIB_LDFLAGS)
 
 $(BN512_SLIB): $(BN512_OBJ) $(MCL_SLIB)
-	$(PRE)$(CXX) -o $@ $(BN512_OBJ) -shared $(LDFLAGS) $(MAC_LDFLAGS)
+	$(PRE)$(CXX) -o $@ $(BN512_OBJ) -shared $(LDFLAGS) $(BN512_SLIB_LDFLAGS)
 
 $(ASM_OBJ): $(ASM_SRC)
 	$(PRE)$(CXX) -c $< -o $@ $(CFLAGS)
@@ -190,11 +199,14 @@ $(LOW_ASM_OBJ): $(LOW_ASM_SRC)
 ifeq ($(OS),mac)
   MAC_GO_LDFLAGS="-ldflags=-s"
 endif
+# set PATH for mingw, set LD_RUN_PATH is for other env
 test_go256: $(MCL_SLIB) $(BN256_SLIB)
-	cd ffi/go/mcl && env LD_RUN_PATH="../../../lib" CGO_CFLAGS="-I../../../include" CGO_LDFLAGS="-L../../../lib -l$(BN256_SNAME) -l$(MCL_SNAME) -lgmpxx -lgmp -lcrypto -lstdc++" go test $(MAC_GO_LDFLAGS) -tags bn256 .
+#	cd ffi/go/mcl && env PATH="$$PATH:../../../lib" LD_RUN_PATH="../../../lib" CGO_LDFLAGS="-L../../../lib -l$(BN256_SNAME) -l$(MCL_SNAME) -lgmpxx -lgmp -lcrypto -lstdc++" go test $(MAC_GO_LDFLAGS) -tags bn256 .
+	cd ffi/go/mcl && env PATH="$$PATH:../../../lib" LD_RUN_PATH="../../../lib" go test $(MAC_GO_LDFLAGS) -tags bn256 .
 
 test_go384: $(MCL_SLIB) $(BN384_SLIB)
-	cd ffi/go/mcl && env LD_RUN_PATH="../../../lib" CGO_CFLAGS="-I../../../include" CGO_LDFLAGS="-L../../../lib -l$(BN384_SNAME) -l$(MCL_SNAME) -lgmpxx -lgmp -lcrypto -lstdc++" go test $(MAC_GO_LDFLAGS) .
+#	cd ffi/go/mcl && env LD_RUN_PATH="../../../lib" CGO_CFLAGS="-I../../../include" CGO_LDFLAGS="-L../../../lib -l$(BN384_SNAME) -l$(MCL_SNAME) -lgmpxx -lgmp -lcrypto -lstdc++" go test $(MAC_GO_LDFLAGS) .
+	cd ffi/go/mcl && env PATH="$$PATH:../../../lib" LD_RUN_PATH="../../../lib" go test $(MAC_GO_LDFLAGS) -tags bn384 .
 
 test_go:
 	$(MAKE) test_go256
diff --git a/ffi/go/mcl/mcl.go b/ffi/go/mcl/mcl.go
index 542efbb..8a1312c 100644
--- a/ffi/go/mcl/mcl.go
+++ b/ffi/go/mcl/mcl.go
@@ -1,8 +1,12 @@
 package mcl
 
 /*
-#cgo CFLAGS:-DMCLBN_FP_UNIT_SIZE=6
-#cgo bn256 CFLAGS:-UMCLBN_FP_UNIT_SIZE -DMCLBN_FP_UNIT_SIZE=4
+#cgo CFLAGS:-I../../../include
+#cgo LDFLAGS:-L../../../lib
+#cgo bn256 CFLAGS:-DMCLBN_FP_UNIT_SIZE=4
+#cgo bn256 LDFLAGS:-lmclbn256_dy -lmcl_dy
+#cgo bn384 CFLAGS:-DMCLBN_FP_UNIT_SIZE=6
+#cgo bn384 LDFLAGS:-lmclbn384_dy -lmcl_dy
 #include <mcl/bn.h>
 */
 import "C"