diff --git a/gcc-10.1.0-arm-provide-futex-atomic-functions.patch b/gcc-10.1.0-arm-provide-futex-atomic-functions.patch
new file mode 100644
index 0000000..6b876b6
--- /dev/null
+++ b/gcc-10.1.0-arm-provide-futex-atomic-functions.patch
@@ -0,0 +1,24 @@
+diff -ru gcc-10.1.0/libstdc++-v3/include/bits/atomic_futex.h gcc-10.1.0.patched/libstdc++-v3/include/bits/atomic_futex.h
+--- gcc-10.1.0/libstdc++-v3/include/bits/atomic_futex.h	2020-05-07 12:50:02.000000000 +0200
++++ gcc-10.1.0.patched/libstdc++-v3/include/bits/atomic_futex.h	2020-06-08 18:18:38.544259479 +0200
+@@ -49,7 +49,7 @@
+ _GLIBCXX_BEGIN_NAMESPACE_VERSION
+ 
+ #ifdef _GLIBCXX_HAS_GTHREADS
+-#if defined(_GLIBCXX_HAVE_LINUX_FUTEX) && ATOMIC_INT_LOCK_FREE > 1
++#if defined(_GLIBCXX_HAVE_LINUX_FUTEX)
+   struct __atomic_futex_unsigned_base
+   {
+     // Returns false iff a timeout occurred.
+diff -ru gcc-10.1.0/libstdc++-v3/src/c++11/futex.cc gcc-10.1.0.patched/libstdc++-v3/src/c++11/futex.cc
+--- gcc-10.1.0/libstdc++-v3/src/c++11/futex.cc	2020-05-07 12:50:02.000000000 +0200
++++ gcc-10.1.0.patched/libstdc++-v3/src/c++11/futex.cc	2020-06-08 18:19:20.413501894 +0200
+@@ -24,7 +24,7 @@
+ 
+ #include <bits/atomic_futex.h>
+ #ifdef _GLIBCXX_HAS_GTHREADS
+-#if defined(_GLIBCXX_HAVE_LINUX_FUTEX) && ATOMIC_INT_LOCK_FREE > 1
++#if defined(_GLIBCXX_HAVE_LINUX_FUTEX)
+ #include <chrono>
+ #include <climits>
+ #include <syscall.h>
diff --git a/gcc.spec b/gcc.spec
index cb77918..5ab3932 100644
--- a/gcc.spec
+++ b/gcc.spec
@@ -40,7 +40,7 @@
 
 Name:          gcc
 Version:       10.1.0
-Release:       1mamba
+Release:       2mamba
 Summary:       GNU Compiler Collection (C, C++, Fortran, Go, Ada)
 Group:         Applications/Development
 Vendor:        openmamba
@@ -67,6 +67,7 @@ Patch14:       gcc-4.8.0-libffi-texinfo.patch
 Patch15:       gcc-4.9.0-upstream-fixes-1.patch
 Patch16:       gcc-4.9.2-arm-lra-bootstrap.patch
 Patch19:       gcc-7.1.0-cross-ftbfs-ucontet_t.patch
+Patch20:       gcc-10.1.0-arm-provide-futex-atomic-functions.patch
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 ## AUTOBUILDREQ-END
@@ -600,6 +601,7 @@ Cross Platform gcc for %{_target_platform}.
 %patch11 -p1
 
 %ifarch arm
+%patch20 -p1
 # workaround for gcc-go
 cp libgo/go/internal/syscall/unix/{getrandom_linux_arm.go,dummy.go}
 %endif
@@ -1466,6 +1468,9 @@ rm -f %{buildroot}%{_infodir}/libffi.info*
 %endif # cross-platform
 
 %changelog
+* Mon Jun 08 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 10.1.0-2mamba
+- arm: added patch to provide futex atomic functions _M_futex_notify_all and _M_futex_wait_until (armv7)
+
 * Mon May 11 2020 Automatic Build System <autodist@mambasoft.it> 10.1.0-1mamba
 - automatic version update by autodist