Use ccache in the CI workflows

scripts/automator/build/os-defaults

@@ -1,6 +1,6 @@
 # Steps in-common to all OSes, plus some helper variables and functions.
 
-STEPS=(pre_build clean autogen configure make_binary strip_binary dependencies post_build)
+STEPS=(pre_build clean autogen configure make_binary strip_binary dependencies ccache_stats post_build)
 
 executable="src/dosbox"
 dependencies=(ldd "${executable}")
@@ -35,6 +35,13 @@ function configure() {
 	fi
 }
 
+function ccache_stats() {
+	if [[ -n "${ccache}" ]]; then
+		underline "Cache statistics" "-"
+		ccache -s | grep --color=never 'hit\|size'
+	fi
+}
+
 function strip_binary() {
 	if [[ "${selected_type}" == "release" ]]; then
 		strip "${executable}"

scripts/automator/packages/manager-apt

@@ -1,2 +1,2 @@
 # Package repo: https://packages.ubuntu.com/
-packages+=(xvfb libtool build-essential libsdl2-dev libsdl2-net-dev libncurses-dev libopusfile-dev)
+packages+=(ccache xvfb libtool build-essential libsdl2-dev libsdl2-net-dev libncurses-dev libopusfile-dev)

scripts/automator/packages/manager-brew

@@ -1,3 +1,3 @@
 # Package repo: https://formulae.brew.sh/
 delim="@"
-packages+=(coreutils autogen autoconf automake make pkg-config libpng ncurses sdl2 sdl2_net opusfile)
+packages+=(ccache coreutils autogen autoconf automake make pkg-config libpng ncurses sdl2 sdl2_net opusfile)

scripts/automator/packages/manager-dnf

@@ -1,2 +1,2 @@
 # Package repo: https://apps.fedoraproject.org/packages/
-packages+=(xvfb libtool ncurses-devel SDL2-devel SDL2_net-devel opusfile-devel)
+packages+=(ccache xvfb libtool ncurses-devel SDL2-devel SDL2_net-devel opusfile-devel)

scripts/automator/packages/manager-macports

@@ -1,3 +1,3 @@
 # Package repo: https://www.macports.org/ports.php?by=name
 delim=""
-packages+=(coreutils autogen autoconf automake pkgconfig libpng ncurses libsdl2 libsdl2_net opusfile)
+packages+=(ccache coreutils autogen autoconf automake pkgconfig libpng ncurses libsdl2 libsdl2_net opusfile)

scripts/automator/packages/manager-msys2

@@ -2,6 +2,6 @@
 # MSYS2 only supports the current latest releases of Clang and GCC, so we disable version customization
 packages+=(autogen autoconf base-devel automake-wrapper binutils)
 pkg_type=$([[ "${bits}" == "64" ]] && echo "x86_64" || echo "i686")
-for pkg in pkg-config libtool libpng zlib ncurses pdcurses SDL2 SDL2_net opusfile; do
+for pkg in ccache pkg-config libtool libpng zlib ncurses pdcurses SDL2 SDL2_net opusfile; do
 	packages+=("mingw-w64-${pkg_type}-${pkg}")
 done

scripts/automator/packages/manager-pacman

@@ -1,4 +1,4 @@
 # Package repo: https://www.archlinux.org/packages/
 # Arch offers 32-bit versions of SDL (but not others)
-packages+=(xvfb libtool ncurses sdl2_net opusfile)
+packages+=(ccache xvfb libtool ncurses sdl2_net opusfile)
 [[ "${bits}" == "32" ]] && packages+=(lib32-sdl2) || packages+=(sdl2)

scripts/automator/packages/manager-zypper

@@ -1,6 +1,6 @@
 # Package repo: https://pkgs.org/
 # openSUSE offers 32-bit versions of SDL and SDL_net (but not others)
-packages+=(devel_basis xvfb libtool opusfile)
+packages+=(ccache devel_basis xvfb libtool opusfile)
 
 if [[ "${bits}" == "32" ]]; then
 	packages+=(ncurses-devel-32bit libSDL2-devel-32bit libSDL2_net-devel-32bit)