From: Yann Collet <cyan@fb.com>
Date: Sat, 22 Sep 2018 00:40:30 +0000 (-0700)
Subject: avoid recompiling dll every time under mingw
X-Git-Tag: v0.0.29~4^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F1331%2Fhead;p=thirdparty%2Fzstd.git

avoid recompiling dll every time under mingw
---

diff --git a/lib/Makefile b/lib/Makefile
index cf8e45b0f..70fb649f7 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -94,8 +94,6 @@ else
 	SHARED_EXT_VER = $(SHARED_EXT).$(LIBVER)
 endif
 
-LIBZSTD = libzstd.$(SHARED_EXT_VER)
-
 
 .PHONY: default all clean install uninstall
 
@@ -111,19 +109,28 @@ libzstd.a: $(ZSTD_OBJ)
 libzstd.a-mt: CPPFLAGS += -DZSTD_MULTITHREAD
 libzstd.a-mt: libzstd.a
 
-$(LIBZSTD): LDFLAGS += -shared -fPIC -fvisibility=hidden
+ifneq (,$(filter Windows%,$(OS)))
+
+LIBZSTD = dll\libzstd.dll
 $(LIBZSTD): $(ZSTD_FILES)
 	@echo compiling dynamic library $(LIBVER)
-ifneq (,$(filter Windows%,$(OS)))
-	@$(CC) $(FLAGS) -DZSTD_DLL_EXPORT=1 -shared $^ -o dll\libzstd.dll
-	dlltool -D dll\libzstd.dll -d dll\libzstd.def -l dll\libzstd.lib
+	@$(CC) $(FLAGS) -DZSTD_DLL_EXPORT=1 -shared $^ -o $@
+	dlltool -D $@ -d dll\libzstd.def -l dll\libzstd.lib
+
 else
+
+LIBZSTD = libzstd.$(SHARED_EXT_VER)
+$(LIBZSTD): LDFLAGS += -shared -fPIC -fvisibility=hidden
+$(LIBZSTD): $(ZSTD_FILES)
+	@echo compiling dynamic library $(LIBVER)
 	@$(CC) $(FLAGS) $^ $(LDFLAGS) $(SONAME_FLAGS) -o $@
 	@echo creating versioned links
 	@ln -sf $@ libzstd.$(SHARED_EXT_MAJOR)
 	@ln -sf $@ libzstd.$(SHARED_EXT)
+
 endif
 
+
 libzstd : $(LIBZSTD)
 
 libzstd-mt : CPPFLAGS += -DZSTD_MULTITHREAD