fix macos build

weird: after replacing the UNAME line with an identical one,
it does work properly now(??).
Possibly a case of hidden special character?

lib/Makefile

@@ -298,14 +298,6 @@ PCLIBPREFIX := $(if $(findstring $(LIBDIR),$(PCLIBDIR)),,$${exec_prefix})
 PCEXEC_PREFIX := $(if $(HAS_EXPLICIT_EXEC_PREFIX),$(EXEC_PREFIX),$${prefix})
 
 
-ifneq ($(MT),)
-  PCLIB :=
-  PCMTLIB := $(LDFLAGS_DYNLIB)
-else
-  PCLIB := $(LDFLAGS_DYNLIB)
-endif
-
-
 ifneq ($(MT),)
   PCLIB :=
   PCMTLIB := $(LDFLAGS_DYNLIB)

lib/libzstd.mk

@@ -206,7 +206,7 @@ endif
 endif
 CPPFLAGS  += -DZSTD_LEGACY_SUPPORT=$(ZSTD_LEGACY_SUPPORT)
 
-UNAME := $(shell sh -c 'MSYSTEM="MSYS" uname') 
+UNAME := $(shell sh -c 'MSYSTEM="MSYS" uname')
 
 ifndef BUILD_DIR
 ifeq ($(UNAME), Darwin)