Revert r35794, which broke the Makefile by introducing GNUisms.

Makefile

@@ -20,46 +20,17 @@ CXXFLAGS += -fPIC -fexceptions
 CPPFLAGS += -DTYPE_DEPENDENT_DISPATCH -DGNUSTEP
 CPPFLAGS += -D__OBJC_RUNTIME_INTERNAL__=1 -D_XOPEN_SOURCE=500 -D__BSD_VISIBLE=1 -D_BSD_SOURCE=1
 
-# Suppress warnings about incorrect selectors
-CPPFLAGS += -DNO_SELECTOR_MISMATCH_WARNINGS
-
-# Some helpful flags for debugging.
-ifeq ($(debug), yes)
-  CPPFLAGS += -g -O0 -fno-inline
-  OBJCFLAGS += -fno-inline
-  CPPFLAGS += -DGC_DEBUG
-else
-  CPP_FLAGS += -O3
-endif
-
-# Hack to support -03 and get the __sync_* GCC builtins work
-# -O3 requires -march=i586 on Linux x86-32, otherwise Clang compiles 
-# programs that segfaults if -fobjc-nonfragile-abi is used.
-ifneq ($(findstring gcc, $(CC)),) 
-  # TODO: Detect target CPU even if GNUstep.sh is not sourced
-  ifeq ($(GNUSTEP_TARGET_CPU), ix86)
-    CFLAGS += -march=i586
-  endif
-endif
-
-# Hack to get mingw to provide declaration for strdup (since it is non-standard)
-# TODO: Detect mingw32 target even if GNUstep.sh is not sourced
-ifeq ($(GNUSTEP_TARGET_OS), mingw32)
-  ${LIBOBJC}_CPPFLAGS += -U__STRICT_ANSI__
-endif
-
-ifeq ($(findstring openbsd, `$CC -dumpmachine`), openbsd)
-  LDFLAGS += -pthread 
-else
-  LDFLAGS += -lpthread 
-endif
-
 ASMFLAGS += `if $(CC) -v 2>&1| grep -q 'clang' ; then echo -no-integrated-as ; fi`
 
 THE_LD=`if [ "$(LD)" = "" ]; then echo "ld"; else echo "$(LD)"; fi` 
 
 STRIP=`if [ "$(strip)" = "yes" ] ; then echo -s ; fi`
 
+# Suppress warnings about incorrect selectors
+CPPFLAGS += -DNO_SELECTOR_MISMATCH_WARNINGS
+# Some helpful flags for debugging.
+#CPPFLAGS += -g -O0 -fno-inline
+CPPFLAGS += -O3
 
 PREFIX?= /usr/local
 LIB_DIR= ${PREFIX}/lib