diff --git a/.github/workflows/nightly-Homebrew-build.yml b/.github/workflows/nightly-Homebrew-build.yml
new file mode 100644
index 000000000..f55e73d23
--- /dev/null
+++ b/.github/workflows/nightly-Homebrew-build.yml
@@ -0,0 +1,78 @@
+# Only the "head" branch of the OpenBLAS package is tested
+
+on:
+  push:
+    paths:
+      - '**/nightly-Homebrew-build.yml'
+  pull_request:
+    branches:
+      - develop
+    paths:
+      - '**/nightly-Homebrew-build.yml'
+  schedule:
+    - cron: 45 7 * * *
+# This is 7:45 AM UTC daily, late at night in the USA
+
+# Since push and pull_request will still always be building and testing the `develop` branch,
+# it only makes sense to test if this file has been changed
+
+name: Nightly-Homebrew-Build
+jobs:
+  build-OpenBLAS-with-Homebrew:
+    runs-on: macos-latest
+    env:
+      HOMEBREW_DEVELOPER: "ON"
+      HOMEBREW_DISPLAY_INSTALL_TIMES: "ON"
+      HOMEBREW_NO_ANALYTICS: "ON"
+      HOMEBREW_NO_AUTO_UPDATE: "ON"
+      HOMEBREW_NO_BOTTLE_SOURCE_FALLBACK: "ON"
+      HOMEBREW_NO_INSTALL_CLEANUP: "ON"
+
+    steps:
+      - name: Random delay for cron job
+        run: |
+          delay=$(( RANDOM % 600 ))
+          printf 'Delaying for %s seconds on event %s' ${delay} "${{ github.event_name }}"
+          sleep ${delay}
+        if: github.event_name == 'schedule'
+
+      - uses: actions/checkout@v2
+        # This isn't even needed, technically. Homebrew will get `develop` via git
+
+      - name: Update Homebrew
+        if: github.event_name != 'pull_request'
+        run: brew update || true
+
+      - name: Install prerequisites
+        run: brew install --fetch-HEAD --HEAD --only-dependencies --keep-tmp openblas
+
+      - name: Install and bottle OpenBLAS
+        run: brew install --fetch-HEAD --HEAD --build-bottle --keep-tmp openblas
+        # the HEAD flags tell Homebrew to build the develop branch fetch via git
+
+      - name: Create bottle
+        run: |
+          brew bottle -v openblas
+          mkdir bottles
+          mv *.bottle.tar.gz bottles
+
+      - name: Upload bottle
+        uses: actions/upload-artifact@v1
+        with:
+          name: openblas--HEAD.catalina.bottle.tar.gz
+          path: bottles
+
+      - name: Show linkage
+        run: brew linkage -v openblas
+
+      - name: Test openblas
+        run: brew test --HEAD --verbose openblas
+
+      - name: Audit openblas formula
+        run: |
+          brew audit --strict openblas
+          brew cat openblas
+
+      - name: Post logs on failure
+        if: failure()
+        run: brew gist-logs --with-hostname -v openblas
diff --git a/.travis.yml b/.travis.yml
index 9e18412e8..0f20aef5c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -176,7 +176,7 @@ matrix:
     - <<: *test-macos
       osx_image: xcode10.1
       env:
-        - CC="/Applications/Xcode-10.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -isysroot /Applications/Xcode-10.1.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS12.1.sdk"
+        - CC="/Applications/Xcode-10.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang"
         - CFLAGS="-O2 -Wno-macro-redefined -isysroot /Applications/Xcode-10.1.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS12.1.sdk -arch arm64 -miphoneos-version-min=10.0"
         - BTYPE="TARGET=ARMV8 BINARY=64 HOSTCC=clang NOFORTRAN=1"
 
diff --git a/Makefile.install b/Makefile.install
index e01d866c9..2dc32c3d9 100644
--- a/Makefile.install
+++ b/Makefile.install
@@ -82,7 +82,7 @@ ifeq ($(OSNAME), $(filter $(OSNAME),FreeBSD OpenBSD NetBSD DragonFly))
 endif
 ifeq ($(OSNAME), Darwin)
 	@-cp $(LIBDYNNAME) "$(DESTDIR)$(OPENBLAS_LIBRARY_DIR)"
-	@-install_name_tool -id "$(DESTDIR)$(OPENBLAS_LIBRARY_DIR)/$(LIBDYNNAME)" "$(DESTDIR)$(OPENBLAS_LIBRARY_DIR)/$(LIBDYNNAME)"
+	@-install_name_tool -id "$(OPENBLAS_LIBRARY_DIR)/$(LIBPREFIX).$(MAJOR_VERSION).dylib" "$(DESTDIR)$(OPENBLAS_LIBRARY_DIR)/$(LIBDYNNAME)"
 	@cd "$(DESTDIR)$(OPENBLAS_LIBRARY_DIR)" ; \
 	ln -fs $(LIBDYNNAME) $(LIBPREFIX).dylib ; \
 	ln -fs $(LIBDYNNAME) $(LIBPREFIX).$(MAJOR_VERSION).dylib
diff --git a/Makefile.prebuild b/Makefile.prebuild
index a366004a1..b00f13368 100644
--- a/Makefile.prebuild
+++ b/Makefile.prebuild
@@ -42,7 +42,7 @@ all: getarch_2nd
 	./getarch_2nd  1 >> $(TARGET_CONF)
 
 config.h : c_check f_check getarch
-	perl ./c_check $(TARGET_MAKE) $(TARGET_CONF) $(CC) $(TARGET_FLAGS)
+	perl ./c_check $(TARGET_MAKE) $(TARGET_CONF) $(CC) $(TARGET_FLAGS) $(CFLAGS)
 ifneq ($(ONLY_CBLAS), 1)
 	perl ./f_check $(TARGET_MAKE) $(TARGET_CONF) $(FC) $(TARGET_FLAGS)
 else
@@ -59,13 +59,13 @@ endif
 
 
 getarch : getarch.c cpuid.S dummy $(CPUIDEMU)
-	$(HOSTCC) $(CFLAGS) $(EXFLAGS) -o $(@F) getarch.c cpuid.S $(CPUIDEMU)
+	$(HOSTCC) $(HOST_CFLAGS) $(EXFLAGS) -o $(@F) getarch.c cpuid.S $(CPUIDEMU)
 
 getarch_2nd : getarch_2nd.c config.h dummy
 ifndef TARGET_CORE
-	$(HOSTCC) -I. $(CFLAGS) -o $(@F) getarch_2nd.c
+	$(HOSTCC) -I. $(HOST_CFLAGS) -o $(@F) getarch_2nd.c
 else
-	$(HOSTCC) -I. $(CFLAGS) -DBUILD_KERNEL -o $(@F) getarch_2nd.c
+	$(HOSTCC) -I. $(HOST_CFLAGS) -DBUILD_KERNEL -o $(@F) getarch_2nd.c
 endif
 
 dummy:
diff --git a/Makefile.system b/Makefile.system
index c0e45515f..cf9e9bafa 100644
--- a/Makefile.system
+++ b/Makefile.system
@@ -214,7 +214,7 @@ ifndef GOTOBLAS_MAKEFILE
 export GOTOBLAS_MAKEFILE = 1
 
 # Generating Makefile.conf and config.h
-DUMMY := $(shell $(MAKE) -C $(TOPDIR) -f Makefile.prebuild CC="$(CC)" FC="$(FC)" HOSTCC="$(HOSTCC)" CFLAGS="$(GETARCH_FLAGS)" BINARY=$(BINARY) USE_OPENMP=$(USE_OPENMP) TARGET_CORE=$(TARGET_CORE) ONLY_CBLAS=$(ONLY_CBLAS) TARGET=$(TARGET) all)
+DUMMY := $(shell $(MAKE) -C $(TOPDIR) -f Makefile.prebuild CC="$(CC)" FC="$(FC)" HOSTCC="$(HOSTCC)" HOST_CFLAGS="$(GETARCH_FLAGS)" CFLAGS="$(CFLAGS)" BINARY=$(BINARY) USE_OPENMP=$(USE_OPENMP) TARGET_CORE=$(TARGET_CORE) ONLY_CBLAS=$(ONLY_CBLAS) TARGET=$(TARGET) all)
 
 ifndef TARGET_CORE
 include $(TOPDIR)/Makefile.conf
diff --git a/c_check b/c_check
index 555b2eccf..c7899c84f 100644
--- a/c_check
+++ b/c_check
@@ -18,11 +18,12 @@ $binary = $ENV{"BINARY"};
 $makefile = shift(@ARGV);
 $config   = shift(@ARGV);
 
-$compiler_name = join(" ", @ARGV);
+$compiler_name = shift(@ARGV);
+$flags = join(" ", @ARGV);
 
 # First, we need to know the target OS and compiler name
 
-$data = `$compiler_name -E ctest.c`;
+$data = `$compiler_name $flags -E ctest.c`;
 
 if ($?) {
     printf STDERR "C Compiler ($compiler_name) is something wrong.\n";
@@ -175,7 +176,7 @@ if ($defined == 0) {
 
 # Do again
 
-$data = `$compiler_name -E ctest.c`;
+$data = `$compiler_name $flags -E ctest.c`;
 
 if ($?) {
     printf STDERR "C Compiler ($compiler_name) is something wrong.\n";
@@ -195,7 +196,7 @@ if (($architecture eq "mips") || ($architecture eq "mips64")) {
 	print $tmpf "void main(void){ __asm__ volatile($code); }\n";
 
 	$args = "$msa_flags -o $tmpf.o $tmpf";
-	my @cmd = ("$compiler_name $args >/dev/null 2>/dev/null");
+	my @cmd = ("$compiler_name $flags $args >/dev/null 2>/dev/null");
 	system(@cmd) == 0;
 	if ($? != 0) {
 	    $have_msa = 0;
@@ -236,7 +237,7 @@ if (($architecture eq "x86") || ($architecture eq "x86_64")) {
 	if ($compiler eq "PGI") {
 	    $args = " -tp skylake -c -o $tmpf.o $tmpf";
 	}
-	my @cmd = ("$compiler_name $args >/dev/null 2>/dev/null");
+	my @cmd = ("$compiler_name $flags $args >/dev/null 2>/dev/null");
 	system(@cmd) == 0;
 	if ($? != 0) {
 	    $no_avx512 = 1;
@@ -247,7 +248,7 @@ if (($architecture eq "x86") || ($architecture eq "x86_64")) {
     }
 }
 
-$data = `$compiler_name -S ctest1.c && grep globl ctest1.s | head -n 1 && rm -f ctest1.s`;
+$data = `$compiler_name $flags -S ctest1.c && grep globl ctest1.s | head -n 1 && rm -f ctest1.s`;
 
 $data =~ /globl\s([_\.]*)(.*)/;
 
@@ -263,19 +264,6 @@ if ($architecture ne $hostarch) {
 
 $cross = 1 if ($os ne $hostos);
 
-# rework cross suffix and architecture if we are on OSX cross-compiling for ARMV8-based IOS
-# the initial autodetection will have been confused by the command-line arguments to clang
-# and the cross-compiler apparently still claims to build for x86_64 in its CC -E output
-if (($os eq "Darwin") && ($cross_suffix ne "")) {
-  my $tmpnam = `xcrun --sdk iphoneos --find clang`;
-  $cross_suffix = substr($tmpnam, 0, rindex($tmpnam, "/")+1 ); 
-# this should produce something like $cross_suffix="/Applications/Xcode-10.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/";
-  $cross =1;
-  $architecture = arm64;
-}
-
-
-
 $openmp = "" if $ENV{USE_OPENMP} != 1;
 
 $linker_L = "";
@@ -283,7 +271,7 @@ $linker_l = "";
 $linker_a = "";
 
 {
-    $link = `$compiler_name -c ctest2.c -o ctest2.o 2>&1 && $compiler_name $openmp -v ctest2.o -o ctest2 2>&1 && rm -f ctest2.o ctest2 ctest2.exe`;
+    $link = `$compiler_name $flags -c ctest2.c -o ctest2.o 2>&1 && $compiler_name $flags $openmp -v ctest2.o -o ctest2 2>&1 && rm -f ctest2.o ctest2 ctest2.exe`;
 
     $link =~ s/\-Y\sP\,/\-Y/g;
 
diff --git a/kernel/power/KERNEL.POWER8 b/kernel/power/KERNEL.POWER8
index ba9a99cd1..d3ae5def4 100644
--- a/kernel/power/KERNEL.POWER8
+++ b/kernel/power/KERNEL.POWER8
@@ -88,7 +88,10 @@ ZTRSMKERNEL_RT	= ../generic/trsm_kernel_RT.c
 #
 #SMINKERNEL   = ../arm/min.c
 #DMINKERNEL   = ../arm/min.c
-#
+
+ISMINKERNEL    = imin.S
+ISMAXKERNEL    = imax.S
+
 ifneq ($(__BYTE_ORDER__),"__ORDER_BIG_ENDIAN__")
 ifneq ($(GCCVERSIONGTEQ9),1)
 ISAMAXKERNEL = isamax_power8.S