diff -Naur openjdk-8.265_p01/common/autoconf/configure openjdk-8.265_p01-copy/common/autoconf/configure
--- openjdk-8.265_p01/common/autoconf/configure	2020-10-11 15:53:08.360010359 -0400
+++ openjdk-8.265_p01-copy/common/autoconf/configure	2020-10-11 21:19:41.768019860 -0400
@@ -103,7 +103,7 @@
 }
 
 # Check for local changes
-check_hg_updates
+run_autogen_or_fail
 
 if test -e $conf_custom_script_dir/generated-configure.sh; then
   # Test if open configure is newer than custom configure, if so, custom needs to
diff -Naur openjdk-8.265_p01/common/autoconf/jdk-options.m4 openjdk-8.265_p01-copy/common/autoconf/jdk-options.m4
--- openjdk-8.265_p01/common/autoconf/jdk-options.m4	2020-10-11 15:53:08.364010359 -0400
+++ openjdk-8.265_p01-copy/common/autoconf/jdk-options.m4	2020-10-11 21:20:14.764019876 -0400
@@ -151,7 +151,7 @@
   AC_SUBST(JVM_VARIANT_ZEROSHARK)
   AC_SUBST(JVM_VARIANT_CORE)
 
-  INCLUDE_SA=true
+  AC_CHECK_HEADER(thread_db.h,INCLUDE_SA=true,INCLUDE_SA=false)
   if test "x$JVM_VARIANT_ZERO" = xtrue ; then
     INCLUDE_SA=false
   fi
diff -Naur openjdk-8.265_p01/hotspot/make/linux/makefiles/defs.make openjdk-8.265_p01-copy/hotspot/make/linux/makefiles/defs.make
--- openjdk-8.265_p01/hotspot/make/linux/makefiles/defs.make	2020-10-11 15:53:08.448010359 -0400
+++ openjdk-8.265_p01-copy/hotspot/make/linux/makefiles/defs.make	2020-10-11 21:21:24.716019910 -0400
@@ -296,6 +296,9 @@
 
 # Serviceability Binaries
 # No SA Support for PPC, IA64, ARM or zero
+# or if thread_db.h missing (musl)
+
+ifneq ($(wildcard /usr/include/thread_db.h),)
 ADD_SA_BINARIES/x86   = $(EXPORT_JRE_LIB_ARCH_DIR)/libsaproc.$(LIBRARY_SUFFIX) \
                         $(EXPORT_LIB_DIR)/sa-jdi.jar
 ADD_SA_BINARIES/sparc = $(EXPORT_JRE_LIB_ARCH_DIR)/libsaproc.$(LIBRARY_SUFFIX) \
@@ -311,6 +314,11 @@
     endif
   endif
 endif
+else
+ADD_SA_BINARIES/x86     =
+ADD_SA_BINARIES/sparc   =
+ADD_SA_BINARIES/aarch64 =
+endif
 ADD_SA_BINARIES/ppc   =
 ADD_SA_BINARIES/ia64  =
 ADD_SA_BINARIES/arm   =
diff -Naur openjdk-8.265_p01/hotspot/make/linux/makefiles/sa.make openjdk-8.265_p01-copy/hotspot/make/linux/makefiles/sa.make
--- openjdk-8.265_p01/hotspot/make/linux/makefiles/sa.make	2020-10-11 15:53:08.448010359 -0400
+++ openjdk-8.265_p01-copy/hotspot/make/linux/makefiles/sa.make	2020-10-11 21:22:39.556019946 -0400
@@ -59,9 +59,11 @@
 
 # if $(AGENT_DIR) does not exist, we don't build SA
 # also, we don't build SA on Itanium or zero.
+# check for thread_db.h too (musl does not have it).
 
-all: 
-	if [ -d $(AGENT_DIR) -a "$(SRCARCH)" != "ia64" \
+all:
+	if [ -d $(AGENT_DIR) -a -f /usr/include/thread_db.h \
+             -a "$(SRCARCH)" != "ia64" \
              -a "$(SRCARCH)" != "zero" ] ; then \
 	   $(MAKE) -f sa.make $(GENERATED)/sa-jdi.jar; \
 	fi
diff -Naur openjdk-8.265_p01/hotspot/make/linux/makefiles/saproc.make openjdk-8.265_p01-copy/hotspot/make/linux/makefiles/saproc.make
--- openjdk-8.265_p01/hotspot/make/linux/makefiles/saproc.make	2020-10-11 15:53:08.448010359 -0400
+++ openjdk-8.265_p01-copy/hotspot/make/linux/makefiles/saproc.make	2020-10-11 21:23:13.672019963 -0400
@@ -66,12 +66,15 @@
 
 # if $(AGENT_DIR) does not exist, we don't build SA
 # also, we don't build SA on Itanium or zero.
+# check for thread_db.h too (musl does not have it).
 
+ifneq ($(wildcard /usr/include/thread_db.h),)
 ifneq ($(wildcard $(AGENT_DIR)),)
 ifneq ($(filter-out ia64 zero,$(SRCARCH)),)
   BUILDLIBSAPROC = $(LIBSAPROC)
 endif
 endif
+endif
 
 ifneq ($(ALT_SASRCDIR),)
 ALT_SAINCDIR=-I$(ALT_SASRCDIR) -DALT_SASRCDIR