diff --git a/Changelog.txt b/Changelog.txt
index 7d8a06edb..48c5a727d 100644
--- a/Changelog.txt
+++ b/Changelog.txt
@@ -1,4 +1,21 @@
 OpenBLAS ChangeLog
+====================================================================
+Version 0.1 alpha2.4
+18-Sep-2011
+common:
+	* Fixed a bug about installation. The header file "fblas77.h" 
+	  works fine now.
+	* Fixed #61 a building bug about setting TARGET and DYNAMIC_ARCH.
+	* Try to handle absolute path of shared library in OSX. (#57)
+	  Thank Dr Kane O'Donnell.
+	* Changed the installation folder layout to $(PREFIX)/include and
+	  $(PREFIX)/lib
+
+x86/x86_64:
+	* Fixed #58 zdot/xdot SEGFAULT bug with GCC-4.6 on x86. According 
+	  to i386 calling convention, The callee should remove the first 
+	  hidden parameter.Thank Mr. John for this patch. 
+
 ====================================================================
 Version 0.1 alpha2.3
 5-Sep-2011
diff --git a/Makefile b/Makefile
index 6789272a3..56d491077 100644
--- a/Makefile
+++ b/Makefile
@@ -56,6 +56,20 @@ ifndef SMP
 else
 	@echo " (Multi threaded; Max num-threads is $(NUM_THREADS))"
 endif
+
+ifeq ($(OSNAME), Darwin)
+	@echo "WARNING: If you plan to use the dynamic library $(LIBDYNNAME), you must run:"
+	@echo
+	@echo "\"make PREFIX=/your_installation_path/ install\"."
+	@echo
+	@echo "(or set PREFIX in Makefile.rule and run make install."
+	@echo "If you want to move the .dylib to a new location later, make sure you change"
+	@echo "the internal name of the dylib with:"
+	@echo
+	@echo "install_name_tool -id /new/absolute/path/to/$(LIBDYNNAME) $(LIBDYNNAME)"
+endif
+	@echo
+	@echo "To install the library, you can run \"make PREFIX=/path/to/your/installation install\"."
 	@echo
 
 shared :
@@ -118,6 +132,13 @@ endif
 #Save the config files for installation
 	cp Makefile.conf Makefile.conf_last
 	cp config.h config_last.h
+ifdef QUAD_PRECISION
+	echo "#define QUAD_PRECISION">> config_last.h
+endif
+ifeq ($(EXPRECISION), 1)
+	echo "#define EXPRECISION">> config_last.h
+endif
+## 
 ifdef DYNAMIC_ARCH
 	  $(MAKE) -C kernel commonlibs || exit 1
 	for d in $(DYNAMIC_CORE) ; \
diff --git a/Makefile.install b/Makefile.install
index 80dafc9c6..2778a491f 100644
--- a/Makefile.install
+++ b/Makefile.install
@@ -3,6 +3,9 @@ export GOTOBLAS_MAKEFILE = 1
 -include $(TOPDIR)/Makefile.conf_last
 include ./Makefile.system
 
+OPENBLAS_INCLUDE_DIR:=$(PREFIX)/include
+OPENBLAS_LIBRARY_DIR:=$(PREFIX)/lib
+
 .PHONY : install
 .NOTPARALLEL : install
 
@@ -11,54 +14,57 @@ lib.grd :
 
 install : 	lib.grd
 	@-mkdir -p $(PREFIX)
-	@echo Generating openblas_config.h in $(PREFIX)
+	@-mkdir -p $(OPENBLAS_INCLUDE_DIR)
+	@-mkdir -p $(OPENBLAS_LIBRARY_DIR)
+	@echo Generating openblas_config.h in $(OPENBLAS_INCLUDE_DIR)
 #for inc 
-	@echo \#ifndef OPENBLAS_CONFIG_H > $(PREFIX)/openblas_config.h
-	@echo \#define OPENBLAS_CONFIG_H >> $(PREFIX)/openblas_config.h
-	@cat config_last.h >> $(PREFIX)/openblas_config.h
-	@echo \#define VERSION \" OpenBLAS $(VERSION) \" >> $(PREFIX)/openblas_config.h
-	@cat openblas_config_template.h >> $(PREFIX)/openblas_config.h
-	@echo \#endif >> $(PREFIX)/openblas_config.h
+	@echo \#ifndef OPENBLAS_CONFIG_H > $(OPENBLAS_INCLUDE_DIR)/openblas_config.h
+	@echo \#define OPENBLAS_CONFIG_H >> $(OPENBLAS_INCLUDE_DIR)/openblas_config.h
+	@cat config_last.h >> $(OPENBLAS_INCLUDE_DIR)/openblas_config.h
+	@echo \#define VERSION \" OpenBLAS $(VERSION) \" >> $(OPENBLAS_INCLUDE_DIR)/openblas_config.h
+	@cat openblas_config_template.h >> $(OPENBLAS_INCLUDE_DIR)/openblas_config.h
+	@echo \#endif >> $(OPENBLAS_INCLUDE_DIR)/openblas_config.h
 
-	@echo Generating f77blas.h in $(PREFIX)
-	@echo \#ifndef OPENBLAS_F77BLAS_H > $(PREFIX)/f77blas.h
-	@echo \#define OPENBLAS_F77BLAS_H >> $(PREFIX)/f77blas.h
-	@echo \#include \"openblas_config.h\" >> $(PREFIX)/f77blas.h
-	@cat common_interface.h >> $(PREFIX)/f77blas.h
-	@echo \#endif >> $(PREFIX)/f77blas.h
+	@echo Generating f77blas.h in $(OPENBLAS_INCLUDE_DIR)
+	@echo \#ifndef OPENBLAS_F77BLAS_H > $(OPENBLAS_INCLUDE_DIR)/f77blas.h
+	@echo \#define OPENBLAS_F77BLAS_H >> $(OPENBLAS_INCLUDE_DIR)/f77blas.h
+	@echo \#include \"openblas_config.h\" >> $(OPENBLAS_INCLUDE_DIR)/f77blas.h
+	@cat common_interface.h >> $(OPENBLAS_INCLUDE_DIR)/f77blas.h
+	@echo \#endif >> $(OPENBLAS_INCLUDE_DIR)/f77blas.h
 
-	@echo Generating cblas.h in $(PREFIX)
-	@sed 's/common/openblas_config/g' cblas.h > $(PREFIX)/cblas.h
+	@echo Generating cblas.h in $(OPENBLAS_INCLUDE_DIR)
+	@sed 's/common/openblas_config/g' cblas.h > $(OPENBLAS_INCLUDE_DIR)/cblas.h
 
 #for install static library 
-	@echo Copy the static library to $(PREFIX)
-	@cp $(LIBNAME) $(PREFIX)
-	@-ln -fs $(PREFIX)/$(LIBNAME) $(PREFIX)/libopenblas.$(LIBSUFFIX)
+	@echo Copy the static library to $(OPENBLAS_LIBRARY_DIR)
+	@cp $(LIBNAME) $(OPENBLAS_LIBRARY_DIR)
+	@-ln -fs $(OPENBLAS_LIBRARY_DIR)/$(LIBNAME) $(OPENBLAS_LIBRARY_DIR)/libopenblas.$(LIBSUFFIX)
 #for install shared library 
-	@echo Copy the shared library to $(PREFIX)
+	@echo Copy the shared library to $(OPENBLAS_LIBRARY_DIR)
 ifeq ($(OSNAME), Linux)
-	-cp $(LIBSONAME) $(PREFIX)
-	-ln -fs $(PREFIX)/$(LIBSONAME) $(PREFIX)/libopenblas.so
+	-cp $(LIBSONAME) $(OPENBLAS_LIBRARY_DIR)
+	-ln -fs $(OPENBLAS_LIBRARY_DIR)/$(LIBSONAME) $(OPENBLAS_LIBRARY_DIR)/libopenblas.so
 endif
 ifeq ($(OSNAME), FreeBSD)
-	-cp $(LIBSONAME) $(PREFIX)
-	-ln -fs $(PREFIX)/$(LIBSONAME) $(PREFIX)/libopenblas.so
+	-cp $(LIBSONAME) $(OPENBLAS_LIBRARY_DIR)
+	-ln -fs $(OPENBLAS_LIBRARY_DIR)/$(LIBSONAME) $(OPENBLAS_LIBRARY_DIR)/libopenblas.so
 endif
 ifeq ($(OSNAME), NetBSD)
-	-cp $(LIBSONAME) $(PREFIX)
-	-ln -fs $(PREFIX)/$(LIBSONAME) $(PREFIX)/libopenblas.so
+	-cp $(LIBSONAME) $(OPENBLAS_LIBRARY_DIR)
+	-ln -fs $(OPENBLAS_LIBRARY_DIR)/$(LIBSONAME) $(OPENBLAS_LIBRARY_DIR)/libopenblas.so
 endif
-ifeq ($(OSNAME), Darwin)
-	-cp $(LIBDYNNAME) $(PREFIX)
-	-ln -fs $(PREFIX)/$(LIBDYNNAME) $(PREFIX)/libopenblas.dylib
+ifeq ($(OSNAME), Darwin)     
+	-cp $(LIBDYNNAME) $(OPENBLAS_LIBRARY_DIR)
+	-install_name_tool -id $(OPENBLAS_LIBRARY_DIR)/$(LIBDYNNAME) $(OPENBLAS_LIBRARY_DIR)/$(LIBDYNNAME)
+	-ln -fs $(OPENBLAS_LIBRARY_DIR)/$(LIBDYNNAME) $(OPENBLAS_LIBRARY_DIR)/libopenblas.dylib
 endif
 ifeq ($(OSNAME), WINNT)
-	-cp $(LIBDLLNAME) $(PREFIX)
-	-ln -fs $(PREFIX)/$(LIBDLLNAME) $(PREFIX)/libopenblas.dll
+	-cp $(LIBDLLNAME) $(OPENBLAS_LIBRARY_DIR)
+	-ln -fs $(OPENBLAS_LIBRARY_DIR)/$(LIBDLLNAME) $(OPENBLAS_LIBRARY_DIR)/libopenblas.dll
 endif
 ifeq ($(OSNAME), CYGWIN_NT)
-	-cp $(LIBDLLNAME) $(PREFIX)
-	-ln -fs $(PREFIX)/$(LIBDLLNAME) $(PREFIX)/libopenblas.dll
+	-cp $(LIBDLLNAME) $(OPENBLAS_LIBRARY_DIR)
+	-ln -fs $(OPENBLAS_LIBRARY_DIR)/$(LIBDLLNAME) $(OPENBLAS_LIBRARY_DIR)/libopenblas.dll
 endif
 
 	@echo Install OK!
diff --git a/Makefile.rule b/Makefile.rule
index 3b32ded84..a7ba203fc 100644
--- a/Makefile.rule
+++ b/Makefile.rule
@@ -3,7 +3,7 @@
 #
 
 # This library's version
-VERSION = 0.1alpha2.3
+VERSION = 0.1alpha2.4
 
 # You can specify the target architecture, otherwise it's
 # automatically detected.
diff --git a/Makefile.system b/Makefile.system
index f0487ac50..84f41a78f 100644
--- a/Makefile.system
+++ b/Makefile.system
@@ -27,7 +27,13 @@ HOSTCC	 = $(CC)
 endif
 
 ifdef TARGET
-GETARCH_FLAGS += -DFORCE_$(TARGET)
+GETARCH_FLAGS := -DFORCE_$(TARGET)
+endif
+
+#TARGET_CORE will override TARGET which is used in DYNAMIC_ARCH=1.
+#
+ifdef TARGET_CORE
+GETARCH_FLAGS := -DFORCE_$(TARGET_CORE)
 endif
 
 ifdef INTERFACE64
diff --git a/common_interface.h b/common_interface.h
index 36bf5aa48..898d91001 100644
--- a/common_interface.h
+++ b/common_interface.h
@@ -38,6 +38,11 @@
 
 #ifndef ASSEMBLER
 
+#ifdef __cplusplus
+extern "C" {
+	/* Assume C declarations for C++ */
+#endif  /* __cplusplus */
+
 int    BLASFUNC(xerbla)(char *, blasint *info, blasint);
 
 FLOATRET  BLASFUNC(sdot)  (blasint *, float  *, blasint *, float  *, blasint *);
@@ -733,4 +738,10 @@ xdouble   BLASFUNC(qlamch)(char *);
 FLOATRET  BLASFUNC(slamc3)(float *, float *);
 double    BLASFUNC(dlamc3)(double *, double *);
 xdouble   BLASFUNC(qlamc3)(xdouble *, xdouble *);
+
+#ifdef __cplusplus
+}
+     
+#endif  /* __cplusplus */
+
 #endif
diff --git a/exports/Makefile b/exports/Makefile
index f4c9314f9..08f496501 100644
--- a/exports/Makefile
+++ b/exports/Makefile
@@ -85,7 +85,7 @@ libgoto_hpl.def : gensymbol
 	perl ./gensymbol win2khpl $(ARCH) dummy $(EXPRECISION) $(NO_CBLAS) $(NO_LAPACK)  > $(@F)
 
 $(LIBDYNNAME) : ../$(LIBNAME) osx.def
-	$(PREFIX)gcc $(CFLAGS) -all_load -dynamiclib -o ../$(LIBDYNNAME) $< -Wl,-exported_symbols_list,osx.def  $(FEXTRALIB)
+	$(CC) $(CFLAGS) -all_load -headerpad_max_install_names -install_name $(CURDIR)/../$(LIBDYNNAME) -dynamiclib -o ../$(LIBDYNNAME) $< -Wl,-exported_symbols_list,osx.def  $(FEXTRALIB)
 
 symbol.$(SUFFIX) : symbol.S
 	$(CC) $(CFLAGS) -c -o $(@F) $^
diff --git a/kernel/x86/xdot.S b/kernel/x86/xdot.S
index 4a5af4642..929763271 100644
--- a/kernel/x86/xdot.S
+++ b/kernel/x86/xdot.S
@@ -307,7 +307,11 @@
 	popl	%ebx
 	popl	%esi
 	popl	%edi
+#if defined(F_INTERFACE) && defined(RETURN_BY_STACK)
+	ret	$0x4
+#else
 	ret
+#endif
 	ALIGN_3
 
 .L88:
@@ -326,6 +330,10 @@
 	popl	%ebx
 	popl	%esi
 	popl	%edi
-	ret
 
+#if defined(F_INTERFACE) && defined(RETURN_BY_STACK)
+	ret	$0x4
+#else
+	ret
+#endif
 	EPILOGUE
diff --git a/kernel/x86/zdot.S b/kernel/x86/zdot.S
index aa4481f97..9d8866ad0 100644
--- a/kernel/x86/zdot.S
+++ b/kernel/x86/zdot.S
@@ -283,7 +283,11 @@
 	popl	%ebx
 	popl	%esi
 	popl	%edi
+#if defined(DOUBLE) || defined(XDOUBLE)
+	ret	$0x4
+#else
 	ret
+#endif
 	ALIGN_3
 
 .L88:
@@ -305,6 +309,10 @@
 	popl	%ebx
 	popl	%esi
 	popl	%edi
-	ret
 
+#if defined(DOUBLE) || defined(XDOUBLE)
+	ret	$0x4
+#else
+	ret
+#endif
 	EPILOGUE
diff --git a/kernel/x86/zdot_sse2.S b/kernel/x86/zdot_sse2.S
index 2a174fb5d..efebe637b 100644
--- a/kernel/x86/zdot_sse2.S
+++ b/kernel/x86/zdot_sse2.S
@@ -1542,7 +1542,5 @@
 	popl	%esi
 	popl	%edi
 /*remove the hidden return value address from the stack.*/
-	popl	%ecx
-	xchgl	%ecx, 0(%esp)
-	ret
+	ret	$0x4
 	EPILOGUE
diff --git a/openblas_config_template.h b/openblas_config_template.h
index 9fb80aa4f..8bf972593 100644
--- a/openblas_config_template.h
+++ b/openblas_config_template.h
@@ -6,6 +6,16 @@
 #define BLASFUNC(FUNC) FUNC
 #endif
 
+#ifdef QUAD_PRECISION
+typedef struct {
+  unsigned long x[2];
+}  xdouble;
+#elif defined EXPRECISION
+#define xdouble long double
+#else
+#define xdouble double
+#endif
+
 #if defined(OS_WINDOWS) && defined(__64BIT__)
 typedef long long BLASLONG;
 typedef unsigned long long BLASULONG;
@@ -19,3 +29,13 @@ typedef BLASLONG blasint;
 #else
 typedef int blasint;
 #endif
+
+#if defined(XDOUBLE) || defined(DOUBLE)
+#define FLOATRET	FLOAT
+#else
+#ifdef NEED_F2CCONV
+#define FLOATRET	double
+#else
+#define FLOATRET	float
+#endif
+#endif