diff --git a/Makefile.power b/Makefile.power
index 28a0bae08..33702c932 100644
--- a/Makefile.power
+++ b/Makefile.power
@@ -42,15 +42,14 @@ FCOMMON_OPT += -O2 -qrecur -qnosave
 else
 FCOMMON_OPT += -O2 -frecursive -fno-fast-math
 endif
-ifeq ($(C_COMPILER), GCC)
+
+ifeq ($(F_COMPILER), GFORTRAN)
 ifneq ($(GCCVERSIONGT4), 1)
 $(warning your compiler is too old to fully support POWER9, getting a newer version of gcc is recommended)
 FCOMMON_OPT += -mcpu=power8 -mtune=power8 
 else
 FCOMMON_OPT += -mcpu=power9 -mtune=power9 
 endif
-else
-FCOMMON_OPT += -mcpu=power9 -mtune=power9
 endif
 else
 FCOMMON_OPT += -O2 -Mrecursive
@@ -84,12 +83,16 @@ CCOMMON_OPT += -DUSE_OPENMP -fopenmp
 else
 CCOMMON_OPT += -DUSE_OPENMP -mp
 endif
+ifeq ($(F_COMPILER), IBM)
+FCOMMON_OPT += -DUSE_OPENMP 
+else
 ifneq ($(F_COMPILER), PGI)
 FCOMMON_OPT += -DUSE_OPENMP -fopenmp
 else
 FCOMMON_OPT += -DUSE_OPENMP -mp
 endif
 endif
+endif
 
 # workaround for C->FORTRAN ABI violation in LAPACKE
 ifeq ($(F_COMPILER), GFORTRAN)
diff --git a/Makefile.system b/Makefile.system
index 5a4af9698..ae6db40b0 100644
--- a/Makefile.system
+++ b/Makefile.system
@@ -1167,6 +1167,10 @@ endif
 
 ifeq ($(F_COMPILER), IBM)
 CCOMMON_OPT += -DF_INTERFACE_IBM
+FEXTRALIB += -lxlf90
+ifeq ($(C_COMPILER), GCC)
+FCOMMON_OPT += -qextname
+endif
 # FCOMMON_OPT	+= -qarch=440
 ifdef BINARY64
 FCOMMON_OPT += -q64
diff --git a/ctest/Makefile b/ctest/Makefile
index 9e85d23b9..af5b34a36 100644
--- a/ctest/Makefile
+++ b/ctest/Makefile
@@ -214,6 +214,11 @@ endif
 ifeq ($(F_COMPILER), NAG)
 CEXTRALIB = -lgomp
 endif
+ifeq ($(F_COMPILER), IBM)
+ifeq ($(C_COMPILER), GCC)
+CEXTRALIB += -lgomp
+endif
+endif
 endif
 
 ifeq ($(BUILD_SINGLE),1)
diff --git a/exports/Makefile b/exports/Makefile
index d81735342..7682f851d 100644
--- a/exports/Makefile
+++ b/exports/Makefile
@@ -272,23 +272,23 @@ static : ../$(LIBNAME)
 	rm -f goto.$(SUFFIX)
 
 osx.def : $(GENSYM) ../Makefile.system ../getarch.c
-	./$(GENSYM) osx $(ARCH) $(BU) $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) $(ONLY_CBLAS) "$(SYMBOLPREFIX)" "$(SYMBOLSUFFIX)" $(BUILD_LAPACK_DEPRECATED) $(BUILD_BFLOAT16) $(BUILD_SINGLE) $(BUILD_DOUBLE) $(BUILD_COMPLEX) $(BUILD_COMPLEX16) > $(@F)
+	./$(GENSYM) osx $(ARCH) "$(BU)" $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) $(ONLY_CBLAS) "$(SYMBOLPREFIX)" "$(SYMBOLSUFFIX)" $(BUILD_LAPACK_DEPRECATED) $(BUILD_BFLOAT16) $(BUILD_SINGLE) $(BUILD_DOUBLE) $(BUILD_COMPLEX) $(BUILD_COMPLEX16) > $(@F)
 
 aix.def : $(GENSYM) ../Makefile.system ../getarch.c
-	./$(GENSYM) aix $(ARCH) $(BU) $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) $(ONLY_CBLAS) "$(SYMBOLPREFIX)" "$(SYMBOLSUFFIX)" $(BUILD_LAPACK_DEPRECATED) $(BUILD_BFLOAT16) $(BUILD_SINGLE) $(BUILD_DOUBLE) $(BUILD_COMPLEX) $(BUILD_COMPLEX16) > $(@F)
+	./$(GENSYM) aix $(ARCH) "$(BU)" $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) $(ONLY_CBLAS) "$(SYMBOLPREFIX)" "$(SYMBOLSUFFIX)" $(BUILD_LAPACK_DEPRECATED) $(BUILD_BFLOAT16) $(BUILD_SINGLE) $(BUILD_DOUBLE) $(BUILD_COMPLEX) $(BUILD_COMPLEX16) > $(@F)
 
 objcopy.def : $(GENSYM) ../Makefile.system ../getarch.c
-	./$(GENSYM) objcopy $(ARCH) $(BU) $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) $(ONLY_CBLAS) "$(SYMBOLPREFIX)" "$(SYMBOLSUFFIX)" $(BUILD_LAPACK_DEPRECATED) $(BUILD_BFLOAT16) $(BUILD_SINGLE) $(BUILD_DOUBLE) $(BUILD_COMPLEX) $(BUILD_COMPLEX16) > $(@F)
+	./$(GENSYM) objcopy $(ARCH) "$(BU)" $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) $(ONLY_CBLAS) "$(SYMBOLPREFIX)" "$(SYMBOLSUFFIX)" $(BUILD_LAPACK_DEPRECATED) $(BUILD_BFLOAT16) $(BUILD_SINGLE) $(BUILD_DOUBLE) $(BUILD_COMPLEX) $(BUILD_COMPLEX16) > $(@F)
 
 objconv.def : $(GENSYM) ../Makefile.system ../getarch.c
-	./$(GENSYM) objconv $(ARCH) $(BU) $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) $(ONLY_CBLAS) "$(SYMBOLPREFIX)" "$(SYMBOLSUFFIX)" $(BUILD_LAPACK_DEPRECATED) $(BUILD_BFLOAT16) $(BUILD_SINGLE) $(BUILD_DOUBLE) $(BUILD_COMPLEX) $(BUILD_COMPLEX16) > $(@F)
+	./$(GENSYM) objconv $(ARCH) "$(BU)" $(EXPRECISION) $(NO_CBLAS)  $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) $(ONLY_CBLAS) "$(SYMBOLPREFIX)" "$(SYMBOLSUFFIX)" $(BUILD_LAPACK_DEPRECATED) $(BUILD_BFLOAT16) $(BUILD_SINGLE) $(BUILD_DOUBLE) $(BUILD_COMPLEX) $(BUILD_COMPLEX16) > $(@F)
 
 test : linktest.c
 	$(CC) $(CFLAGS) $(LDFLAGS) -w -o linktest linktest.c ../$(LIBSONAME) -lm && echo OK.
 	rm -f linktest
 
 linktest.c : $(GENSYM) ../Makefile.system ../getarch.c
-	./$(GENSYM) linktest  $(ARCH) $(BU) $(EXPRECISION) $(NO_CBLAS) $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) $(ONLY_CBLAS) "$(SYMBOLPREFIX)" "$(SYMBOLSUFFIX)" $(BUILD_LAPACK_DEPRECATED) $(BUILD_BFLOAT16) $(BUILD_SINGLE) $(BUILD_DOUBLE) $(BUILD_COMPLEX) $(BUILD_COMPLEX16) > linktest.c
+	./$(GENSYM) linktest  $(ARCH) "$(BU)" $(EXPRECISION) $(NO_CBLAS) $(NO_LAPACK) $(NO_LAPACKE) $(NEED2UNDERSCORES) $(ONLY_CBLAS) "$(SYMBOLPREFIX)" "$(SYMBOLSUFFIX)" $(BUILD_LAPACK_DEPRECATED) $(BUILD_BFLOAT16) $(BUILD_SINGLE) $(BUILD_DOUBLE) $(BUILD_COMPLEX) $(BUILD_COMPLEX16) > linktest.c
 
 clean ::
 	@rm -f *.def *.dylib __.SYMDEF* *.renamed
diff --git a/f_check b/f_check
index 526c41dc6..f30231bc4 100755
--- a/f_check
+++ b/f_check
@@ -155,6 +155,10 @@ else
             *'IBM XL'*)
                 vendor=IBM
                 openmp='-openmp'
+		case "$CC" in *gcc*)
+		bu=_
+		;;
+		esac
                 ;;
             *NAG*)
                 vendor=NAG
@@ -223,6 +227,10 @@ else
             *ppuf*|*xlf*)
                 vendor=IBM
                 openmp='-openmp'
+		case "$CC" in *gcc*)
+		bu=_
+		;;
+		esac
                 ;;
             *open64*)
                 vendor=OPEN64
diff --git a/interface/Makefile b/interface/Makefile
index 2ac9663d6..78335357b 100644
--- a/interface/Makefile
+++ b/interface/Makefile
@@ -1301,7 +1301,7 @@ xhpr2.$(SUFFIX) xhpr2.$(PSUFFIX) : zhpr2.c
 ifeq ($(BUILD_BFLOAT16),1)
 sbgemm.$(SUFFIX) sbgemm.$(PSUFFIX) : gemm.c ../param.h
 	$(CC) -c $(CFLAGS) $< -o $(@F)
-sbgemmt.$(SUFFIX) sbgemm.$(PSUFFIX) : gemmt.c ../param.h
+sbgemmt.$(SUFFIX) sbgemmt.$(PSUFFIX) : gemmt.c ../param.h
 	$(CC) -c $(CFLAGS) $< -o $(@F)
 endif
 
diff --git a/test/Makefile b/test/Makefile
index 46a7b1158..715842b4d 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -271,6 +271,11 @@ endif
 ifeq ($(F_COMPILER), NAG)
 CEXTRALIB = -lgomp
 endif
+ifeq ($(F_COMPILER), IBM)
+ifeq ($(C_COMPILER), GCC)
+CEXTRALIB += -lgomp
+endif
+endif
 endif
 
 ifeq ($(BUILD_SINGLE),1)
@@ -326,7 +331,7 @@ endif
 
 ifeq ($(BUILD_BFLOAT16),1)
 test_sbgemm : compare_sgemm_sbgemm.c ../$(LIBNAME)
-	$(FC) $(FLDFLAGS) -o test_sbgemm compare_sgemm_sbgemm.c ../$(LIBNAME) $(EXTRALIB) $(CEXTRALIB)
+	$(CC) $(CFLAGS) -o test_sbgemm compare_sgemm_sbgemm.c ../$(LIBNAME) $(EXTRALIB) $(CEXTRALIB)
 endif
 
 ifeq ($(BUILD_COMPLEX),1)