diff --git a/mpc-1.2.0.tar.gz b/mpc-1.2.0.tar.gz
deleted file mode 100644
index 5a1620d..0000000
--- a/mpc-1.2.0.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:e90f2d99553a9c19911abdb4305bf8217106a957e3994436428572c8dfe8fda6
-size 840711
diff --git a/mpc-1.2.0.tar.gz.sig b/mpc-1.2.0.tar.gz.sig
deleted file mode 100644
index 258a4c5..0000000
Binary files a/mpc-1.2.0.tar.gz.sig and /dev/null differ
diff --git a/mpc-1.2.1.tar.gz b/mpc-1.2.1.tar.gz
new file mode 100644
index 0000000..2221273
--- /dev/null
+++ b/mpc-1.2.1.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:17503d2c395dfcf106b622dc142683c1199431d095367c6aacba6eec30340459
+size 838731
diff --git a/mpc-1.2.1.tar.gz.sig b/mpc-1.2.1.tar.gz.sig
new file mode 100644
index 0000000..dc79961
--- /dev/null
+++ b/mpc-1.2.1.tar.gz.sig
@@ -0,0 +1,7 @@
+-----BEGIN PGP SIGNATURE-----
+
+iIwEABEIADQWIQStF6Ie+K7Y8cwC29n31cm/dlxh4wUCX5KefRYcYW5kcmVhcy5l
+bmdlQGlucmlhLmZyAAoJEPfVyb92XGHjqAEA/RQXzaWvYWOI5LuQpMnNfg/vjwL2
+tCCcHlQXRHyCqxzaAP47BhDZajH2AGG4yeMPYQEc1yPPcjS+1kgA/Z5c5gIjiA==
+=Tns3
+-----END PGP SIGNATURE-----
diff --git a/mpc.changes b/mpc.changes
index dc48f2b..7b9310c 100644
--- a/mpc.changes
+++ b/mpc.changes
@@ -1,3 +1,20 @@
+-------------------------------------------------------------------
+Thu Oct 29 18:30:03 UTC 2020 - Andreas Stieger <andreas.stieger@gmx.de>
+
+- mpc 1.2.1:
+  * Fix an incompatibility problem with GMP 6.0 and before
+  * Fix an intermediate overflow in asin
+
+-------------------------------------------------------------------
+Mon Oct 26 08:44:47 UTC 2020 - Andreas Stieger <andreas.stieger@gmx.de>
+
+- express build dependencies explicitly to match the versions
+  required by configue, so that the OBS scheduler is aware of them
+- move texinfo requirements to -devel package where they are
+  are actually used
+- package license in every subpackage and mark as license
+- run spec-cleaner
+
 -------------------------------------------------------------------
 Mon Aug 24 08:07:46 UTC 2020 - Richard Biener <rguenther@suse.com>
 
diff --git a/mpc.spec b/mpc.spec
index e1bbcec..18b0251 100644
--- a/mpc.spec
+++ b/mpc.spec
@@ -17,7 +17,7 @@
 
 
 Name:           mpc
-Version:        1.2.0
+Version:        1.2.1
 Release:        0
 Summary:        MPC multiple-precision complex shared library
 License:        LGPL-3.0-or-later
@@ -27,11 +27,9 @@ Source0:        https://ftp.gnu.org/gnu/mpc/mpc-%{version}.tar.gz
 Source1:        https://ftp.gnu.org/gnu/mpc/mpc-%{version}.tar.gz.sig
 Source2:        %{name}.keyring
 Source3:        baselibs.conf
-BuildRequires:  gmp-devel
-BuildRequires:  mpfr-devel
-Requires(post): %{install_info_prereq}
-Requires(preun): %{install_info_prereq}
-BuildRoot:      %{_tmppath}/%{name}-%{version}-build
+BuildRequires:  pkgconfig
+BuildRequires:  pkgconfig(gmp) >= 5.0.0
+BuildRequires:  pkgconfig(mpfr) >= 4.1.0
 
 %description
 MPC is a C library for the arithmetic of complex numbers with
@@ -51,9 +49,10 @@ built upon and follows the same principles as MPFR.
 Summary:        MPC multiple-precision complex library development files
 Group:          Development/Libraries/C and C++
 Requires:       libmpc3 = %{version}
-Requires:       mpfr-devel
-# FIXME: use proper Requires(pre/post/preun/...)
-PreReq:         %{install_info_prereq}
+Requires:       pkgconfig(gmp) >= 5.0.0
+Requires:       pkgconfig(mpfr) >= 4.1.0
+Requires(post): %{install_info_prereq}
+Requires(preun): %{install_info_prereq}
 
 %description devel
 MPC multiple-precision complex library development files.
@@ -64,33 +63,33 @@ MPC multiple-precision complex library development files.
 %build
 %global _lto_cflags %{_lto_cflags} -ffat-lto-objects
 %configure
-make %{?_smp_mflags}
+%make_build
 
 %check
-make check %{?_smp_mflags}
+%make_build check
 
 %install
-make DESTDIR=%{buildroot} install %{?_smp_mflags}
-rm %{buildroot}%{_libdir}/libmpc.la
+%make_install
+find %{buildroot} -type f -name "*.la" -delete -print
 
 %post -n libmpc3 -p /sbin/ldconfig
-
 %post devel
 %install_info --info-dir=%{_infodir} %{_infodir}/%{name}.info.gz
 
 %postun -n libmpc3 -p /sbin/ldconfig
-
 %preun devel
 %install_info_delete --info-dir=%{_infodir} %{_infodir}/%{name}.info.gz
 
 %files -n libmpc3
 %defattr(-,root,root)
+%license COPYING.LESSER
 %{_libdir}/libmpc.so.3*
 
 %files devel
 %defattr(-,root,root)
-%doc AUTHORS NEWS COPYING.LESSER
-%{_infodir}/mpc.info.gz
+%license COPYING.LESSER
+%doc AUTHORS NEWS
+%{_infodir}/mpc.info%{?ext_info}
 %{_libdir}/libmpc.a
 %{_libdir}/libmpc.so
 %{_includedir}/mpc.h