diff --git a/libffcall.spec b/libffcall.spec
index 8349b56..219b61d 100644
--- a/libffcall.spec
+++ b/libffcall.spec
@@ -1,6 +1,6 @@
 Name:          libffcall
 Version:       2.2
-Release:       1mamba
+Release:       2mamba
 Summary:       Libraries that can be used to build foreign function call interfaces.
 Group:         System/Libraries
 Vendor:        openmamba
@@ -10,6 +10,8 @@ URL:           https://www.gnu.org/software/libffcall/
 Source:        https://ftp.gnu.org/gnu/libffcall/libffcall-%{version}.tar.gz
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
+BuildRequires: glibc-devel
+BuildRequires: ldconfig
 ## AUTOBUILDREQ-END
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
@@ -42,8 +44,9 @@ This is a collection of four libraries which can be used to build foreign functi
 
 This package contains static libraries for development.
 
-%prep
+%debug_package
 
+%prep
 %setup -q
 
 %build
@@ -63,6 +66,8 @@ make
 %{__mkdir_p} %{buildroot}%{_datadir}
 %makeinstall
 
+chmod +x %{buildroot}%{_libdir}/lib*.so.*
+
 %clean
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 
@@ -71,15 +76,21 @@ make
 
 %files
 %defattr(-,root,root)
-%{_libdir}/*.so.*
-%{_mandir}/man3/*.3.gz
-%doc %{_datadir}/html/*.html
+%{_libdir}/libavcall.so.*
+%{_libdir}/libffcall.so.*
+%{_libdir}/libcallback.so.*
+%{_libdir}/libtrampoline.so.*
 %doc COPYING
 
 %files devel
 %defattr(-,root,root)
 %{_includedir}/*.h
-%{_libdir}/*.so
+%{_libdir}/libavcall.so
+%{_libdir}/libffcall.so
+%{_libdir}/libcallback.so
+%{_libdir}/libtrampoline.so
+%{_mandir}/man3/*.3*
+%doc %{_datadir}/html/*.html
 %doc NEWS README 
 
 %files static
@@ -88,6 +99,9 @@ make
 %{_libdir}/*.la
 
 %changelog
+* Tue May 12 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 2.2-2mamba
+- fix libraries +x permissions
+
 * Wed Nov 27 2019 Automatic Build System <autodist@mambasoft.it> 2.2-1mamba
 - automatic version update by autodist