packaging: use gcc10 for 'opensuse/leap:15.3'

* docker/Dockerfile_opensuse-leap_15.3: The 'opensuse/leap:15.3'
docker image doesn't seem to have gcc11, so use gcc10 instead.
* packaging/rules/rpm/jami-gnome.spec: Unconditionally require
'make' for build, and require 'cmake' only where a recent enough
version is available in the distro (otherwise, we grab and use
external cmake e.g. using 'scripts/install-cmake.sh').

jami-packaging#111


Co-authored-by: Amin Bandali <amin.bandali@savoirfairelinux.com>
Change-Id: I5686f8e5d77eb8108b1581a33a2432006a1a688b

docker/Dockerfile_opensuse-leap_15.3

@@ -6,8 +6,8 @@ RUN zypper --non-interactive install -y \
         rpmdevtools \
         Mesa-dri-devel Mesa-dri \
         git \
-        gcc11 \
-        gcc11-c++ \
+        gcc10 \
+        gcc10-c++ \
         rpm-build \
         tar \
         make \
@@ -92,8 +92,8 @@ RUN zypper --non-interactive install -y \
         ninja \
         wget
 
-RUN update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-11 50
-RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-11 50
+RUN update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-10 50
+RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 50
 
 # Install CMake 3.19 for Qt 6
 ADD scripts/install-cmake.sh /opt/install-cmake.sh

packaging/rules/rpm/jami-gnome.spec

@@ -14,14 +14,14 @@ Source:        jami_%{version}.tar.gz
 Requires:      jami-libclient = %{version}
 
 # Build dependencies.
-BuildRequires: cmake
+BuildRequires: make
 BuildRequires: gettext-devel
 
 # Build and runtime dependencies.
 BuildRequires: glib2-devel
 %if 0%{?fedora} >= 32
 BuildRequires: gcc
-BuildRequires: make
+BuildRequires: cmake
 BuildRequires: dbus-devel
 BuildRequires: libnotify-devel
 BuildRequires: libappindicator-gtk3-devel