diff --git a/README.md b/README.md
index cadae3f..3370fca 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # mozjs52
 
+Mozilla stand-alone library implementing JavaScript 24.
+
diff --git a/mozjs-52.6.0-soname.patch b/mozjs-52.6.0-soname.patch
new file mode 100644
index 0000000..12a73b8
--- /dev/null
+++ b/mozjs-52.6.0-soname.patch
@@ -0,0 +1,34 @@
+diff --git a/config/rules.mk b/config/rules.mk
+--- a/config/rules.mk
++++ b/config/rules.mk
+@@ -418,7 +418,7 @@ endif # AIX
+ #
+ # Linux: add -Bsymbolic flag for components
+ #
+-ifeq ($(OS_ARCH),Linux)
++#ifeq ($(OS_ARCH),Linux)
+ ifdef IS_COMPONENT
+ EXTRA_DSO_LDOPTS += -Wl,-Bsymbolic
+ endif
+@@ -426,7 +426,8 @@ ifdef LD_VERSION_SCRIPT
+ EXTRA_DSO_LDOPTS += -Wl,--version-script,$(LD_VERSION_SCRIPT)
+ EXTRA_DEPS += $(LD_VERSION_SCRIPT)
+ endif
+-endif
++#endif
++EXTRA_DSO_LDOPTS += -Wl,-soname,lib$(JS_LIBRARY_NAME).so.0
+ 
+ ifdef SYMBOLS_FILE
+ ifeq ($(OS_TARGET),WINNT)
+diff --git a/js/src/Makefile.in b/js/src/Makefile.in
+--- a/js/src/Makefile.in
++++ b/js/src/Makefile.in
+@@ -222,6 +222,8 @@ ifneq (,$(REAL_LIBRARY))
+ endif
+ ifneq (,$(SHARED_LIBRARY))
+ 	$(SYSINSTALL) $(SHARED_LIBRARY) $(DESTDIR)$(libdir)
++	mv -f $(DESTDIR)$(libdir)/$(SHARED_LIBRARY) $(DESTDIR)$(libdir)/$(SHARED_LIBRARY).0
++	ln -s $(SHARED_LIBRARY).0 $(DESTDIR)$(libdir)/$(SHARED_LIBRARY)
+ ifeq ($(OS_ARCH),Darwin)
+ 	install_name_tool -id $(abspath $(libdir)/$(SHARED_LIBRARY)) $(DESTDIR)$(libdir)/$(SHARED_LIBRARY)
+ endif
diff --git a/mozjs52.spec b/mozjs52.spec
new file mode 100644
index 0000000..66fb1d8
--- /dev/null
+++ b/mozjs52.spec
@@ -0,0 +1,129 @@
+%define MAJver %(echo %version | cut -d. -f1)
+%define majver %(echo %version | cut -d. -f1-2)
+Name:          mozjs52
+Version:       52.6.0
+Release:       2mamba
+Summary:       Mozilla stand-alone library implementing JavaScript 24
+Group:         System/Libraries
+Vendor:        openmamba
+Distribution:  openmamba
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           http://www.mozilla.org
+Source:        http://ftp.gnome.org/pub/gnome/teams/releng/tarballs-needing-help/mozjs/mozjs-%{version}gnome1.tar.xz
+#Source:        http://ftp.mozilla.org/pub/mozilla.org/js/mozjs-%{version}.tar.bz2
+Patch0:        mozjs-52.6.0-soname.patch
+# Only GPL because linking to readline
+License:       GPL
+#License:       MPL, GPL, LGPL
+## AUTOBUILDREQ-BEGIN
+BuildRequires: glibc-devel
+BuildRequires: libgcc
+BuildRequires: libicu-devel
+BuildRequires: libnspr-devel
+BuildRequires: libreadline-devel
+BuildRequires: libstdc++6-devel
+BuildRequires: libtermcap-devel
+BuildRequires: libz-devel
+## AUTOBUILDREQ-END
+BuildRequires: pkg-config
+Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
+Requires(post): %{__install_info}
+Requires(preun): %{__install_info}
+BuildRoot:     %{_tmppath}/%{name}-%{version}-root
+
+%description
+Mozilla stand-alone library implementing JavaScript 24.
+
+%package -n lib%{name}
+Group:         System/Libraries
+Summary:       Mozilla stand-alone library implementing JavaScript 24
+
+%description -n lib%{name}
+Mozilla stand-alone library implementing JavaScript 24.
+
+%package -n lib%{name}-devel
+Group:         Development/Libraries
+Summary:       Development files for %{name}
+Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
+Requires:      pkg-config
+
+%description -n lib%{name}-devel
+This package contains libraries and header files for developing applications that use %{name}.
+
+%debug_package
+
+%prep
+%setup -q -c
+#-D -T
+#:<< _EOF
+%patch0 -p1
+
+%build
+#:<< _EOF
+cd js/src
+export LIBS="-ltermcap"
+%ifarch arm
+export CFLAGS="-fpermissive -fno-delete-null-pointer-checks -fno-tree-vrp -fno-strict-aliasing -O2 -fno-schedule-insns"
+export CXXFLAGS="-fpermissive -fno-delete-null-pointer-checks -fno-tree-vrp -fno-strict-aliasing -O2 -fno-schedule-insns"
+%endif
+
+%configure \
+    --with-intl-api \
+    --with-system-nspr \
+    --with-system-icu \
+    --enable-threadsafe \
+	--enable-readline
+
+#%ifarch arm
+#    --with-cpu-arch=armv5te \
+#	--enable-optimize="-g -O2 -fno-schedule-insns"
+#%endif
+
+%make
+
+%install
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+cd js/src
+%makeinstall
+
+#rm -f %{buildroot}%{_libdir}/libmozjs185.so
+#ln -s libmozjs185.so.%{majver} %{buildroot}%{_libdir}/libmozjs185.so
+#rm -f %{buildroot}%{_libdir}/libmozjs185.so.1.0
+#ln -s libmozjs185.so.%{version} %{buildroot}%{_libdir}/libmozjs185.so.1.0
+
+%clean
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+
+%post -n lib%{name} -p /sbin/ldconfig
+%postun -n lib%{name} -p /sbin/ldconfig
+
+%files -n lib%{name}
+%defattr(-,root,root)
+%{_libdir}/libmozjs-%{MAJver}.so.*
+%{_libdir}/libjs_static.ajs
+
+%files -n lib%{name}-devel
+%defattr(-,root,root)
+%{_bindir}/js%{MAJver}
+%{_bindir}/js%{MAJver}-config
+%dir %{_includedir}/mozjs-%{MAJver}/
+%{_includedir}/mozjs-%{MAJver}/*
+%{_libdir}/libmozjs-%{MAJver}.so
+%{_libdir}/pkgconfig/mozjs-%{MAJver}.pc
+%doc README
+
+%changelog
+* Sat Jul 06 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 52.6.0-2mamba
+- legacy package
+
+* Tue Dec 11 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 52.6.0-1mamba
+- update to 52.6.0
+
+* Mon Dec 10 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 52.2.1-2mamba
+- arm: rebuilt
+
+* Mon Aug 13 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 52.2.1-1mamba
+- update to 52.2.1
+
+* Thu Jun 19 2014 Silvan Calarco <silvan.calarco@mambasoft.it> 24.2.0-1mamba
+- package created from mozjs185