diff --git a/Changelog.txt b/Changelog.txt
index 574f462265..dd186b683b 100644
--- a/Changelog.txt
+++ b/Changelog.txt
@@ -1,4 +1,16 @@
 OpenBLAS ChangeLog
+====================================================================
+Version 0.2.8
+01-Aug-2013
+common:
+	* Support Open64 5.0. (#266)
+	* Add executable stack markings. (#262, Thank Sébastien Fabbro)
+	* Respect user's LDFLAGS (Thank Sébastien Fabbro)
+
+x86/x86-64:
+	* Rollback bulldozer and piledriver kernels to barcelona kernels (#263)
+	  We will fix the compuational error bug in bulldozer and piledriver kernels.
+
 ====================================================================
 Version 0.2.7
 20-Jul-2013
diff --git a/Makefile.rule b/Makefile.rule
index fb377c3775..a92eb500ac 100644
--- a/Makefile.rule
+++ b/Makefile.rule
@@ -3,7 +3,7 @@
 #
 
 # This library's version
-VERSION = 0.2.7
+VERSION = 0.2.8
 
 # If you set the suffix, the library name will be libopenblas_$(LIBNAMESUFFIX).a
 # and libopenblas_$(LIBNAMESUFFIX).so. Meanwhile, the soname in shared library 
diff --git a/Makefile.system b/Makefile.system
index b1f9ba514f..727b089606 100644
--- a/Makefile.system
+++ b/Makefile.system
@@ -324,14 +324,16 @@ ifeq ($(ARCH), x86)
 DYNAMIC_CORE = KATMAI COPPERMINE NORTHWOOD PRESCOTT BANIAS \
 	       CORE2 PENRYN DUNNINGTON NEHALEM ATHLON OPTERON OPTERON_SSE3 BARCELONA BOBCAT ATOM NANO
 ifneq ($(NO_AVX), 1)
-DYNAMIC_CORE += SANDYBRIDGE BULLDOZER PILEDRIVER
+DYNAMIC_CORE += SANDYBRIDGE 
+#BULLDOZER PILEDRIVER
 endif
 endif
 
 ifeq ($(ARCH), x86_64)
 DYNAMIC_CORE = PRESCOTT CORE2 PENRYN DUNNINGTON NEHALEM OPTERON OPTERON_SSE3 BARCELONA BOBCAT ATOM NANO
 ifneq ($(NO_AVX), 1)
-DYNAMIC_CORE += SANDYBRIDGE BULLDOZER PILEDRIVER
+DYNAMIC_CORE += SANDYBRIDGE 
+#BULLDOZER PILEDRIVER
 endif
 endif
 
@@ -895,6 +897,7 @@ export CC
 export FC
 export BU
 export FU
+export NEED2UNDERSCORES
 export USE_THREAD
 export NUM_THREADS
 export NUM_CORES
diff --git a/cpuid.h b/cpuid.h
index 2cbbd45390..4311ce95e6 100644
--- a/cpuid.h
+++ b/cpuid.h
@@ -105,8 +105,8 @@
 #define CORE_NANO	19
 #define CORE_SANDYBRIDGE 20
 #define CORE_BOBCAT     21
-#define CORE_BULLDOZER  22
-#define CORE_PILEDRIVER  23
+#define CORE_BULLDOZER CORE_BARCELONA
+#define CORE_PILEDRIVER CORE_BARCELONA
 #define CORE_HASWELL CORE_SANDYBRIDGE
 
 #define HAVE_SSE      (1 <<  0)
@@ -198,8 +198,8 @@ typedef struct {
 #define CPUTYPE_NANO			43
 #define CPUTYPE_SANDYBRIDGE             44
 #define CPUTYPE_BOBCAT                  45
-#define CPUTYPE_BULLDOZER               46
-#define CPUTYPE_PILEDRIVER              47
+#define CPUTYPE_BULLDOZER CPUTYPE_BARCELONA
+#define CPUTYPE_PILEDRIVER CPUTYPE_BARCELONA
 // this define is because BLAS doesn't have haswell specific optimizations yet
 #define CPUTYPE_HASWELL CPUTYPE_SANDYBRIDGE 
 
diff --git a/driver/others/dynamic.c b/driver/others/dynamic.c
index 197cc2b2de..bf60efb190 100644
--- a/driver/others/dynamic.c
+++ b/driver/others/dynamic.c
@@ -63,14 +63,16 @@ extern gotoblas_t  gotoblas_BARCELONA;
 extern gotoblas_t  gotoblas_BOBCAT;
 #ifndef NO_AVX
 extern gotoblas_t  gotoblas_SANDYBRIDGE;
-extern gotoblas_t  gotoblas_BULLDOZER;
-extern gotoblas_t  gotoblas_PILEDRIVER;
+//extern gotoblas_t  gotoblas_BULLDOZER;
+//extern gotoblas_t  gotoblas_PILEDRIVER;
 #else
 //Use NEHALEM kernels for sandy bridge
 #define gotoblas_SANDYBRIDGE gotoblas_NEHALEM
+#endif
+
 #define gotoblas_BULLDOZER gotoblas_BARCELONA
 #define gotoblas_PILEDRIVER gotoblas_BARCELONA
-#endif
+
 //Use sandy bridge kernels for haswell.
 #define gotoblas_HASWELL gotoblas_SANDYBRIDGE
 
diff --git a/exports/Makefile b/exports/Makefile
index 9fd93dd93e..64d7e181f5 100644
--- a/exports/Makefile
+++ b/exports/Makefile
@@ -18,6 +18,10 @@ ifndef NO_LAPACKE
 NO_LAPACKE	= 0
 endif
 
+ifndef NEED2UNDERSCORES
+NEED2UNDERSCORES=0
+endif
+
 ifeq ($(OSNAME), WINNT)
 ifeq ($(F_COMPILER), GFORTRAN)
 EXTRALIB += -lgfortran
@@ -94,13 +98,13 @@ libgoto2_shared.dll : ../$(LIBNAME) libgoto2_shared.def
 	-Wl,--out-implib,libgoto2_shared.lib $(FEXTRALIB)
 
 libopenblas.def : gensymbol
-	perl ./gensymbol win2k    $(ARCH) dummy $(EXPRECISION) $(NO_CBLAS) $(NO_LAPACK) $(NO_LAPACKE) > $(@F)
+	perl ./gensymbol win2k    $(ARCH) dummy $(EXPRECISION) $(NO_CBLAS) $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) > $(@F)
 
 libgoto2_shared.def : gensymbol
-	perl ./gensymbol win2k    $(ARCH) dummy $(EXPRECISION) $(NO_CBLAS) $(NO_LAPACK) $(NO_LAPACKE) > $(@F)
+	perl ./gensymbol win2k    $(ARCH) dummy $(EXPRECISION) $(NO_CBLAS) $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) > $(@F)
 
 libgoto_hpl.def : gensymbol
-	perl ./gensymbol win2khpl $(ARCH) dummy $(EXPRECISION) $(NO_CBLAS) $(NO_LAPACK) $(NO_LAPACKE) > $(@F)
+	perl ./gensymbol win2khpl $(ARCH) dummy $(EXPRECISION) $(NO_CBLAS) $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) > $(@F)
 
 $(LIBDYNNAME) : ../$(LIBNAME) osx.def
 	$(CC) $(CFLAGS) -all_load -headerpad_max_install_names -install_name $(CURDIR)/../$(LIBDYNNAME) -dynamiclib -o ../$(LIBDYNNAME) $< -Wl,-exported_symbols_list,osx.def  $(FEXTRALIB)
@@ -187,23 +191,23 @@ static : ../$(LIBNAME)
 	rm -f goto.$(SUFFIX)
 
 linux.def : gensymbol ../Makefile.system ../getarch.c
-	perl ./gensymbol linux $(ARCH) $(BU) $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) > $(@F)
+	perl ./gensymbol linux $(ARCH) $(BU) $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) > $(@F)
 
 osx.def : gensymbol ../Makefile.system ../getarch.c
-	perl ./gensymbol osx $(ARCH) $(BU) $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) > $(@F)
+	perl ./gensymbol osx $(ARCH) $(BU) $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) > $(@F)
 
 aix.def : gensymbol ../Makefile.system ../getarch.c
-	perl ./gensymbol aix $(ARCH) $(BU) $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) > $(@F)
+	perl ./gensymbol aix $(ARCH) $(BU) $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) > $(@F)
 
 symbol.S : gensymbol
-	perl ./gensymbol win2kasm noarch dummy $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) > symbol.S
+	perl ./gensymbol win2kasm noarch dummy $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) > symbol.S
 
 test : linktest.c
 	$(CC) $(CFLAGS) $(LDFLAGS) -w -o linktest linktest.c ../$(LIBSONAME) -lm && echo OK.
 	rm -f linktest
 
 linktest.c : gensymbol ../Makefile.system ../getarch.c
-	perl ./gensymbol linktest  $(ARCH) $(BU) $(EXPRECISION) $(NO_CBLAS) $(NO_LAPACK) $(NO_LAPACKE) > linktest.c
+	perl ./gensymbol linktest  $(ARCH) $(BU) $(EXPRECISION) $(NO_CBLAS) $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) > linktest.c
 
 clean ::
 	@rm -f *.def *.dylib __.SYMDEF*
diff --git a/exports/gensymbol b/exports/gensymbol
index 0a9729a6c0..7076412918 100644
--- a/exports/gensymbol
+++ b/exports/gensymbol
@@ -114,8 +114,8 @@
 
 		# ALLAUX  -- Auxiliary routines called from all precisions
 		# already provided by @blasobjs: xerbla, lsame
-		ilaenv, ieeeck, lsamen, xerbla_array, iparmq,
-		ilaprec, ilatrans, ilauplo, iladiag, chla_transtype,
+		ilaenv, ieeeck, lsamen,  iparmq,
+		ilaprec, ilatrans, ilauplo, iladiag, 
 		ilaver, slamch, slamc3,
 
 		# SCLAUX  -- Auxiliary routines called from both REAL and COMPLEX.
@@ -2672,12 +2672,25 @@
 		#LAPACKE_zlagsy_work,
 		);
 
+#These function may need 2 underscores.
+@lapack_embeded_underscore_objs=(xerbla_array, chla_transtype,);
+
 if ($ARGV[5] == 1) {
 	#NO_LAPACK=1
 	@underscore_objs = (@blasobjs, @misc_underscore_objs);
 } elsif (-d "../lapack-3.1.1" || -d "../lapack-3.4.0" || -d "../lapack-3.4.1" ||
          -d "../lapack-3.4.2" || -d "../lapack-netlib") {
-    @underscore_objs = (@blasobjs, @lapackobjs, @lapackobjs2, @misc_underscore_objs);
+
+    if ($ARGV[7] == 0){
+	# NEED2UNDERSCORES=0
+	# Don't need 2 underscores
+	@underscore_objs = (@blasobjs, @lapackobjs, @lapackobjs2, @misc_underscore_objs, @lapack_embeded_underscore_objs);
+    }else{
+	# Need 2 underscores
+	@underscore_objs = (@blasobjs, @lapackobjs, @lapackobjs2, @misc_underscore_objs);
+	@need_2underscore_objs = (@lapack_embeded_underscore_objs);
+    };
+
 } else {
     @underscore_objs = (@blasobjs, @lapackobjs, @misc_underscore_objs);
 }
@@ -2729,6 +2742,10 @@ if ($ARGV[0] eq "linux"){
 	print $objs, $bu, "\n";
     }
 
+    foreach $objs (@need_2underscore_objs) {
+	print $objs, $bu, $bu, "\n";
+    }
+
 #    if ($ARGV[4] == 0) {
 	foreach $objs (@no_underscore_objs) {
 	    print $objs, "\n";
@@ -2750,6 +2767,10 @@ if ($ARGV[0] eq "osx"){
 	print "_", $objs, $bu, "\n";
     }
 
+    foreach $objs (@need_2underscore_objs) {
+	print "_", $objs, $bu, $bu, "\n";
+    }
+
 #    if ($ARGV[4] == 0) {
 	foreach $objs (@no_underscore_objs) {
 	    print "_", $objs, "\n";
@@ -2767,6 +2788,10 @@ if ($ARGV[0] eq "aix"){
 	print $objs, $bu, "\n";
     }
 
+    foreach $objs (@need_2underscore_objs) {
+	print $objs, $bu, $bu, "\n";
+    }
+
 #    if ($ARGV[4] == 0) {
 	foreach $objs (@no_underscore_objs) {
 	    print $objs, "\n";
@@ -2791,6 +2816,17 @@ if ($ARGV[0] eq "win2k"){
 	print "\t$uppercase=$objs", "_  \@", $count, "\n";
 	$count ++;
     }
+
+    foreach $objs (@need_2underscore_objs) {
+	$uppercase = $objs;
+	$uppercase =~ tr/[a-z]/[A-Z]/;
+	print "\t$objs=$objs","__  \@", $count, "\n";
+	$count ++;
+	print "\t",$objs, "__=$objs","__  \@", $count, "\n";
+	$count ++;
+	print "\t$uppercase=$objs", "__  \@", $count, "\n";
+	$count ++;
+    }
     
     #for misc_common_objs
     foreach $objs (@misc_common_objs) {
@@ -2852,6 +2888,18 @@ if ($ARGV[0] eq "microsoft"){
    	print "\t$uppercase\_ = $objs","_\n";
 	$count ++;
     }
+
+    foreach $objs (@need_2underscore_objs) {
+	$uppercase = $objs;
+	$uppercase =~ tr/[a-z]/[A-Z]/;
+	print "\t$objs=$objs","__  \@", $count, "\n";
+	$count ++;
+	print "\t",$objs, "__=$objs","__  \@", $count, "\n";
+	$count ++;
+	print "\t$uppercase=$objs", "__  \@", $count, "\n";
+	$count ++;
+    }
+
     exit(0);
 }
 
@@ -2868,6 +2916,16 @@ if ($ARGV[0] eq "win2kasm"){
 	print "_", $uppercase, "_:\n";
 	print "\tjmp\t_", $objs, "_\n";
     }
+
+    foreach $objs (@need_2underscore_objs) {
+	$uppercase = $objs;
+	$uppercase =~ tr/[a-z]/[A-Z]/;
+	print "\t.align 16\n";
+	print "\t.globl _", $uppercase, "__\n";
+	print "_", $uppercase, "__:\n";
+	print "\tjmp\t_", $objs, "__\n";
+    }
+
     exit(0);
 }
 
@@ -2880,6 +2938,11 @@ if ($ARGV[0] eq "linktest"){
     foreach $objs (@underscore_objs) {
 	print $objs, $bu, "();\n" if $objs ne "xerbla";
     }
+
+    foreach $objs (@need_2underscore_objs) {
+	print $objs, $bu, $bu, "();\n";
+    }
+
 #    if ($ARGV[4] == 0) {
 	foreach $objs (@no_underscore_objs) {
 	print $objs, "();\n";
diff --git a/f_check b/f_check
index d7c0b23283..86f1fa689b 100644
--- a/f_check
+++ b/f_check
@@ -114,6 +114,12 @@ if ($compiler eq "") {
 	    $vendor = IBM;
 	    $openmp = "-openmp";
 	}
+
+	# for embeded underscore name, e.g. zho_ge, it may append 2 underscores.
+	$data = `$compiler -O2 -S ftest3.f > /dev/null 2>&1 && cat ftest3.s && rm -f ftest3.s`;
+	if ($data =~ /zho_ge__/) {
+	    $need2bu       = 1;
+	}
     }
 
     if ($vendor eq "") {
@@ -245,6 +251,8 @@ if ($link ne "") {
 
     $link =~ s/\-rpath\s+/\-rpath\@/g;
 
+    $link =~ s/\-rpath-link\s+/\-rpath-link\@/g;
+
     @flags = split(/[\s\,\n]/, $link);
     # remove leading and trailing quotes from each flag.
     @flags = map {s/^['"]|['"]$//g; $_} @flags;
@@ -265,7 +273,15 @@ if ($link ne "") {
 	    $linker_L .= "-Wl,". $flags . " ";
 	    }
 	
-	if ($flags =~ /^\-rpath/) {
+	if ($flags =~ /^\-rpath\@/) {
+	    $flags =~ s/\@/\,/g;
+	    if ($vendor eq "PGI") {
+		$flags =~ s/lib$/libso/;
+	    }
+	    $linker_L .= "-Wl,". $flags . " " ;
+	}
+
+	if ($flags =~ /^\-rpath-link\@/) {
 	    $flags =~ s/\@/\,/g;
 	    if ($vendor eq "PGI") {
 		$flags =~ s/lib$/libso/;
@@ -309,6 +325,9 @@ print MAKEFILE "NOFORTRAN=1\n" if $nofortran == 1;
 
 print CONFFILE "#define BUNDERSCORE\t$bu\n" if $bu ne "";
 print CONFFILE "#define NEEDBUNDERSCORE\t1\n" if $bu ne "";
+print CONFFILE "#define NEED2UNDERSCORES\t1\n" if $need2bu ne "";
+
+print MAKEFILE "NEED2UNDERSCORES=1\n" if $need2bu ne "";
 
 if (($linker_l ne "") || ($linker_a ne "")) {
     print MAKEFILE "FEXTRALIB=$linker_L $linker_l $linker_a\n";
diff --git a/ftest3.f b/ftest3.f
new file mode 100644
index 0000000000..8f2cd332f5
--- /dev/null
+++ b/ftest3.f
@@ -0,0 +1,6 @@
+      double complex function zho_ge()
+
+      zho_ge = (0.0d0,0.0d0)
+
+      return 
+      end
diff --git a/getarch.c b/getarch.c
index 3ffda62446..ec9bb75a84 100644
--- a/getarch.c
+++ b/getarch.c
@@ -354,7 +354,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define CORENAME  "OPTERON"
 #endif
 
-#if defined(FORCE_BARCELONA) || defined(FORCE_SHANGHAI) || defined(FORCE_ISTANBUL)
+#if defined(FORCE_BARCELONA) || defined(FORCE_SHANGHAI) || defined(FORCE_ISTANBUL) || defined (FORCE_PILEDRIVER) || defined (FORCE_BULLDOZER)
 #define FORCE
 #define FORCE_INTEL
 #define ARCHITECTURE    "X86"
@@ -384,7 +384,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define CORENAME  "BOBCAT"
 #endif
 
-#if defined (FORCE_BULLDOZER)
+#if 0
 #define FORCE
 #define FORCE_INTEL
 #define ARCHITECTURE    "X86"
@@ -400,7 +400,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define CORENAME  "BULLDOZER"
 #endif
 
-#if defined (FORCE_PILEDRIVER)
+#if 0 
 #define FORCE
 #define FORCE_INTEL
 #define ARCHITECTURE    "X86"
diff --git a/getarch_2nd.c b/getarch_2nd.c
index fc800cfacd..0b140bba4c 100644
--- a/getarch_2nd.c
+++ b/getarch_2nd.c
@@ -8,7 +8,7 @@
 
 int main(int argc, char **argv) {
 
-  if ( (argc <= 1) || (argc >= 2) && (*argv[1] == '0')) {
+  if ( (argc <= 1) || ((argc >= 2) && (*argv[1] == '0'))) {
     printf("SGEMM_UNROLL_M=%d\n", SGEMM_DEFAULT_UNROLL_M);
     printf("SGEMM_UNROLL_N=%d\n", SGEMM_DEFAULT_UNROLL_N);
     printf("DGEMM_UNROLL_M=%d\n", DGEMM_DEFAULT_UNROLL_M);
diff --git a/interface/trtri.c b/interface/trtri.c
index 0564bc1830..007dbd7faf 100644
--- a/interface/trtri.c
+++ b/interface/trtri.c
@@ -60,7 +60,7 @@ static blasint (*trtri_parallel[])(blas_arg_t *, BLASLONG *, BLASLONG *, FLOAT *
 };
 #endif
 
-extern void dtrtri_lapack_(char *UPLO, char *DIAG, int *N, double *a, int *ldA, int *Info);
+extern void BLASFUNC(dtrtrilapack)(char *UPLO, char *DIAG, int *N, double *a, int *ldA, int *Info);
 
 int NAME(char *UPLO, char *DIAG, blasint *N, FLOAT *a, blasint *ldA, blasint *Info){
 
@@ -137,7 +137,10 @@ int NAME(char *UPLO, char *DIAG, blasint *N, FLOAT *a, blasint *ldA, blasint *In
     // double trtri_U single thread error
     // call dtrtri from lapack for a walk around.
     if(uplo==0){
-      dtrtri_lapack_(UPLO, DIAG, N, a, ldA, Info);
+      BLASFUNC(dtrtrilapack)(UPLO, DIAG, N, a, ldA, Info);
+#ifndef PPC440
+      blas_memory_free(buffer);
+#endif
       return 0;
     }
 #endif
diff --git a/lapack/trtri/dtrtri_lapack.f b/lapack/trtri/dtrtri_lapack.f
index 31a880f764..8e9a081705 100644
--- a/lapack/trtri/dtrtri_lapack.f
+++ b/lapack/trtri/dtrtri_lapack.f
@@ -107,7 +107,7 @@
 *> \ingroup doubleOTHERcomputational
 *
 *  =====================================================================
-      SUBROUTINE DTRTRI_LAPACK( UPLO, DIAG, N, A, LDA, INFO )
+      SUBROUTINE DTRTRILAPACK( UPLO, DIAG, N, A, LDA, INFO )
 *
 *  -- LAPACK computational routine (version 3.4.0) --
 *  -- LAPACK is a software package provided by Univ. of Tennessee,    --