configure: move target-specific defaults to an external machine file

Enable Windows-specific defaults with a machine file, so that related
options can be automatically parsed and included in the help message.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

configs/meson/windows.txt

@@ -0,0 +1,9 @@
+# target-specific defaults, can still be overridden on
+# the command line
+
+[built-in options]
+bindir = ''
+prefix = '/qemu'
+
+[project options]
+qemu_suffix = ''

configure

@@ -246,8 +246,6 @@ default_cflags='-O2 -g'
 git_submodules_action="update"
 docs="auto"
 EXESUF=""
-prefix="/usr/local"
-qemu_suffix="qemu"
 system="yes"
 linux_user=""
 bsd_user=""
@@ -256,7 +254,6 @@ subdirs=""
 ninja=""
 python=
 download="enabled"
-bindir="bin"
 skip_meson=no
 use_containers="yes"
 gdb_bin=$(command -v "gdb-multiarch" || command -v "gdb")
@@ -583,9 +580,6 @@ done
 
 if test "$targetos" = "windows" ; then
   EXESUF=".exe"
-  prefix="/qemu"
-  bindir=""
-  qemu_suffix=""
 fi
 
 meson_option_build_array() {
@@ -622,6 +616,14 @@ meson_option_parse() {
   fi
 }
 
+meson_add_machine_file() {
+  if test "$cross_compile" = "yes"; then
+    meson_option_add --cross-file "$1"
+  else
+    meson_option_add --native-file "$1"
+  fi
+}
+
 for opt do
   optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)')
   case "$opt" in
@@ -629,8 +631,6 @@ for opt do
   ;;
   --version|-V) exec cat "$source_path/VERSION"
   ;;
-  --prefix=*) prefix="$optarg"
-  ;;
   --cross-prefix=*)
   ;;
   --cc=*)
@@ -701,10 +701,6 @@ for opt do
   ;;
   --static) static="yes"
   ;;
-  --bindir=*) bindir="$optarg"
-  ;;
-  --with-suffix=*) qemu_suffix="$optarg"
-  ;;
   --host=*|--build=*|\
   --disable-dependency-tracking|\
   --sbindir=*|--sharedstatedir=*|\
@@ -861,7 +857,6 @@ Options: [defaults in brackets after descriptions]
 
 Standard options:
   --help                   print this message
-  --prefix=PREFIX          install in PREFIX [$prefix]
   --target-list=LIST       set target list (default: build all)
 $(echo Available targets: $default_target_list | \
   fold -s -w 53 | sed -e 's/^/                           /')
@@ -886,8 +881,6 @@ Advanced options (experts only):
   --ninja=NINJA            use specified ninja [$ninja]
   --smbd=SMBD              use specified smbd [$smbd]
   --static                 enable static build [$static]
-  --bindir=PATH            install binaries in PATH
-  --with-suffix=SUFFIX     suffix for QEMU data inside datadir/libdir/sysconfdir/docdir [$qemu_suffix]
   --without-default-features default all --enable-* options to "disabled"
   --without-default-devices  do not include any device that is not needed to
                            start the emulator (only use if you are including
@@ -1803,24 +1796,25 @@ if test "$skip_meson" = no; then
     else
         echo "endian = 'little'" >> $cross
     fi
-    cross_arg="--cross-file config-meson.cross"
 
     native="config-meson.native.new"
     echo "# Automatically generated by configure - do not modify" > $native
     echo "[binaries]" >> $native
     echo "c = [$(meson_quote $host_cc)]" >> $native
     mv $native config-meson.native
-    cross_arg="$cross_arg --native-file config-meson.native"
-  else
-    cross_arg="--native-file config-meson.cross"
+    meson_option_add --native-file
+    meson_option_add config-meson.native
   fi
   mv $cross config-meson.cross
+  meson_add_machine_file config-meson.cross
+  if test -f "$source_path/configs/meson/$targetos.txt"; then
+    meson_add_machine_file $source_path/configs/meson/$targetos.txt
+  fi
 
   rm -rf meson-private meson-info meson-logs
 
   # Built-in options
   test "$download" = "disabled" && meson_option_add "--wrap-mode=nodownload"
-  test "$bindir" != "bin" && meson_option_add "-Dbindir=$bindir"
   test "$default_feature" = no && meson_option_add -Dauto_features=disabled
   test "$static" = yes && meson_option_add -Dprefer_static=true
   test "$pie" = no && meson_option_add -Db_pie=false
@@ -1831,11 +1825,10 @@ if test "$skip_meson" = no; then
   test "$docs" != auto && meson_option_add "-Ddocs=$docs"
   test -n "${LIB_FUZZING_ENGINE+xxx}" && meson_option_add "-Dfuzzing_engine=$LIB_FUZZING_ENGINE"
   test "$plugins" = yes && meson_option_add "-Dplugins=true"
-  test "$qemu_suffix" != qemu && meson_option_add "-Dqemu_suffix=$qemu_suffix"
   test "$smbd" != '' && meson_option_add "-Dsmbd=$smbd"
   test "$tcg" != enabled && meson_option_add "-Dtcg=$tcg"
   run_meson() {
-    NINJA=$ninja $meson setup --prefix "$prefix" "$@" $cross_arg "$PWD" "$source_path"
+    NINJA=$ninja $meson setup "$@" "$PWD" "$source_path"
   }
   eval run_meson $meson_options
   if test "$?" -ne 0 ; then

scripts/meson-buildoptions.py

@@ -28,7 +28,6 @@
 SKIP_OPTIONS = {
     "default_devices",
     "fuzzing_engine",
-    "qemu_suffix",
     "smbd",
 }
 
@@ -40,6 +39,7 @@
     "malloc": "enable-malloc",
     "pkgversion": "with-pkgversion",
     "qemu_firmwarepath": "firmwarepath",
+    "qemu_suffix": "with-suffix",
     "trace_backends": "enable-trace-backends",
     "trace_file": "with-trace-file",
 }
@@ -52,6 +52,7 @@
 BUILTIN_OPTIONS = {
     "b_coverage",
     "b_lto",
+    "bindir",
     "datadir",
     "debug",
     "includedir",
@@ -60,6 +61,7 @@
     "localedir",
     "localstatedir",
     "mandir",
+    "prefix",
     "strip",
     "sysconfdir",
 }

scripts/meson-buildoptions.sh

@@ -3,6 +3,7 @@ meson_options_help() {
   printf "%s\n" '  --audio-drv-list=CHOICES Set audio driver list [default] (choices: alsa/co'
   printf "%s\n" '                           reaudio/default/dsound/jack/oss/pa/pipewire/sdl/s'
   printf "%s\n" '                           ndio)'
+  printf "%s\n" '  --bindir=VALUE           Executable directory [bin]'
   printf "%s\n" '  --block-drv-ro-whitelist=VALUE'
   printf "%s\n" '                           set block driver read-only whitelist (by default'
   printf "%s\n" '                           affects only QEMU, not tools like qemu-img)'
@@ -62,6 +63,7 @@ meson_options_help() {
   printf "%s\n" '  --localedir=VALUE        Locale data directory [share/locale]'
   printf "%s\n" '  --localstatedir=VALUE    Localstate data directory [/var/local]'
   printf "%s\n" '  --mandir=VALUE           Manual page directory [share/man]'
+  printf "%s\n" '  --prefix=VALUE           Installation prefix [/usr/local]'
   printf "%s\n" '  --sysconfdir=VALUE       Sysconf data directory [etc]'
   printf "%s\n" '  --tls-priority=VALUE     Default TLS protocol/cipher priority string'
   printf "%s\n" '                           [NORMAL]'
@@ -69,6 +71,8 @@ meson_options_help() {
   printf "%s\n" '                           auto/sigaltstack/ucontext/windows)'
   printf "%s\n" '  --with-pkgversion=VALUE  use specified string as sub-version of the'
   printf "%s\n" '                           package'
+  printf "%s\n" '  --with-suffix=VALUE      Suffix for QEMU data/modules/config directories'
+  printf "%s\n" '                           (can be empty) [qemu]'
   printf "%s\n" '  --with-trace-file=VALUE  Trace file prefix for simple backend [trace]'
   printf "%s\n" ''
   printf "%s\n" 'Optional features, enabled with --enable-FEATURE and'
@@ -229,6 +233,7 @@ _meson_option_parse() {
     --disable-gcov) printf "%s" -Db_coverage=false ;;
     --enable-lto) printf "%s" -Db_lto=true ;;
     --disable-lto) printf "%s" -Db_lto=false ;;
+    --bindir=*) quote_sh "-Dbindir=$2" ;;
     --enable-blkio) printf "%s" -Dblkio=enabled ;;
     --disable-blkio) printf "%s" -Dblkio=disabled ;;
     --block-drv-ro-whitelist=*) quote_sh "-Dblock_drv_ro_whitelist=$2" ;;
@@ -407,6 +412,7 @@ _meson_option_parse() {
     --disable-plugins) printf "%s" -Dplugins=false ;;
     --enable-png) printf "%s" -Dpng=enabled ;;
     --disable-png) printf "%s" -Dpng=disabled ;;
+    --prefix=*) quote_sh "-Dprefix=$2" ;;
     --enable-pvrdma) printf "%s" -Dpvrdma=enabled ;;
     --disable-pvrdma) printf "%s" -Dpvrdma=disabled ;;
     --enable-qcow1) printf "%s" -Dqcow1=enabled ;;
@@ -414,6 +420,7 @@ _meson_option_parse() {
     --enable-qed) printf "%s" -Dqed=enabled ;;
     --disable-qed) printf "%s" -Dqed=disabled ;;
     --firmwarepath=*) quote_sh "-Dqemu_firmwarepath=$(meson_option_build_array $2)" ;;
+    --with-suffix=*) quote_sh "-Dqemu_suffix=$2" ;;
     --enable-qga-vss) printf "%s" -Dqga_vss=enabled ;;
     --disable-qga-vss) printf "%s" -Dqga_vss=disabled ;;
     --enable-qom-cast-debug) printf "%s" -Dqom_cast_debug=true ;;