configure: move environment-specific defaults to config-meson.cross

Store the -Werror and SMBD defaults in the machine file, which still allows
them to be overridden on the command line and enables automatic parsing
of the related options.

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

configure

@@ -258,7 +258,6 @@ skip_meson=no
 use_containers="yes"
 gdb_bin=$(command -v "gdb-multiarch" || command -v "gdb")
 gdb_arches=""
-werror=""
 
 # Don't accept a target_list environment variable.
 unset target_list
@@ -314,7 +313,6 @@ objcopy="${OBJCOPY-${cross_prefix}objcopy}"
 ld="${LD-${cross_prefix}ld}"
 ranlib="${RANLIB-${cross_prefix}ranlib}"
 nm="${NM-${cross_prefix}nm}"
-smbd="$SMBD"
 strip="${STRIP-${cross_prefix}strip}"
 widl="${WIDL-${cross_prefix}widl}"
 windres="${WINDRES-${cross_prefix}windres}"
@@ -651,8 +649,6 @@ for opt do
   ;;
   --ninja=*) ninja="$optarg"
   ;;
-  --smbd=*) smbd="$optarg"
-  ;;
   --extra-cflags=*)
   ;;
   --extra-cxxflags=*)
@@ -744,10 +740,6 @@ for opt do
   ;;
   --disable-pie) pie="no"
   ;;
-  --enable-werror) werror="yes"
-  ;;
-  --disable-werror) werror="no"
-  ;;
   --enable-cfi) cfi=true
   ;;
   --disable-cfi) cfi=false
@@ -879,7 +871,6 @@ Advanced options (experts only):
   --cross-prefix-ARCH=PREFIX cross compiler prefix when building ARCH guest test cases
   --python=PYTHON          use specified python [$python]
   --ninja=NINJA            use specified ninja [$ninja]
-  --smbd=SMBD              use specified smbd [$smbd]
   --static                 enable static build [$static]
   --without-default-features default all --enable-* options to "disabled"
   --without-default-devices  do not include any device that is not needed to
@@ -887,7 +878,6 @@ Advanced options (experts only):
                            desired devices in configs/devices/)
   --with-devices-ARCH=NAME override default configs/devices
   --enable-debug           enable common debug build options
-  --disable-werror         disable compilation abort on warning
   --cpu=CPU                Build for host CPU [$cpu]
   --disable-containers     don't use containers for cross-building
   --container-engine=TYPE  which container engine to use [$container_engine]
@@ -1011,17 +1001,6 @@ if test -z "$ninja"; then
     fi
 fi
 
-# Consult white-list to determine whether to enable werror
-# by default.  Only enable by default for git builds
-if test -z "$werror" ; then
-    if test -e "$source_path/.git" && \
-        { test "$targetos" = linux || test "$targetos" = "windows"; }; then
-        werror="yes"
-    else
-        werror="no"
-    fi
-fi
-
 if test "$targetos" = "bogus"; then
     # Now that we know that we're not printing the help and that
     # the compiler works (so the results of the check_defines we used
@@ -1764,6 +1743,20 @@ if test "$skip_meson" = no; then
   test -n "$objcc" && echo "objc_args = [$(meson_quote $OBJCFLAGS $EXTRA_OBJCFLAGS)]" >> $cross
   echo "c_link_args = [$(meson_quote $CFLAGS $LDFLAGS $EXTRA_CFLAGS $EXTRA_LDFLAGS)]" >> $cross
   echo "cpp_link_args = [$(meson_quote $CXXFLAGS $LDFLAGS $EXTRA_CXXFLAGS $EXTRA_LDFLAGS)]" >> $cross
+
+  # Only enable by default for git builds and on select OSes
+  echo "# environment defaults, can still be overridden on " >> $cross
+  echo "# the command line" >> $cross
+  if test -e "$source_path/.git" && \
+      { test "$targetos" = linux || test "$targetos" = "windows"; }; then
+      echo 'werror = true' >> $cross
+  fi
+  echo "[project options]" >> $cross
+  if test "$SMBD" != ''; then
+    echo "smbd = $(meson_quote "$SMBD")" >> $cross
+  fi
+
+  echo >> $cross
   echo "[binaries]" >> $cross
   echo "c = [$(meson_quote $cc $CPU_CFLAGS)]" >> $cross
   test -n "$cxx" && echo "cpp = [$(meson_quote $cxx $CPU_CFLAGS)]" >> $cross
@@ -1818,14 +1811,12 @@ if test "$skip_meson" = no; then
   test "$default_feature" = no && meson_option_add -Dauto_features=disabled
   test "$static" = yes && meson_option_add -Dprefer_static=true
   test "$pie" = no && meson_option_add -Db_pie=false
-  test "$werror" = yes && meson_option_add -Dwerror=true
 
   # QEMU options
   test "$cfi" != false && meson_option_add "-Dcfi=$cfi" "-Db_lto=$cfi"
   test "$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 "$smbd" != '' && meson_option_add "-Dsmbd=$smbd"
   test "$tcg" != enabled && meson_option_add "-Dtcg=$tcg"
   run_meson() {
     NINJA=$ninja $meson setup "$@" "$PWD" "$source_path"

scripts/meson-buildoptions.py

@@ -28,7 +28,6 @@
 SKIP_OPTIONS = {
     "default_devices",
     "fuzzing_engine",
-    "smbd",
 }
 
 OPTION_NAMES = {
@@ -47,6 +46,7 @@
 # Options that configure autodetects, even though meson defines them as boolean
 AUTO_OPTIONS = {
     "plugins",
+    "werror",
 }
 
 BUILTIN_OPTIONS = {
@@ -64,6 +64,7 @@
     "prefix",
     "strip",
     "sysconfdir",
+    "werror",
 }
 
 LINE_WIDTH = 76

scripts/meson-buildoptions.sh

@@ -64,6 +64,7 @@ meson_options_help() {
   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" '  --smbd=VALUE             Path to smbd for slirp networking'
   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]'
@@ -205,6 +206,7 @@ meson_options_help() {
   printf "%s\n" '  vpc             vpc image format support'
   printf "%s\n" '  vte             vte support for the gtk UI'
   printf "%s\n" '  vvfat           vvfat image format support'
+  printf "%s\n" '  werror          Treat warnings as errors'
   printf "%s\n" '  whpx            WHPX acceleration support'
   printf "%s\n" '  xen             Xen backend support'
   printf "%s\n" '  xen-pci-passthrough'
@@ -453,6 +455,7 @@ _meson_option_parse() {
     --disable-slirp-smbd) printf "%s" -Dslirp_smbd=disabled ;;
     --enable-smartcard) printf "%s" -Dsmartcard=enabled ;;
     --disable-smartcard) printf "%s" -Dsmartcard=disabled ;;
+    --smbd=*) quote_sh "-Dsmbd=$2" ;;
     --enable-snappy) printf "%s" -Dsnappy=enabled ;;
     --disable-snappy) printf "%s" -Dsnappy=disabled ;;
     --enable-sndio) printf "%s" -Dsndio=enabled ;;
@@ -529,6 +532,8 @@ _meson_option_parse() {
     --disable-vte) printf "%s" -Dvte=disabled ;;
     --enable-vvfat) printf "%s" -Dvvfat=enabled ;;
     --disable-vvfat) printf "%s" -Dvvfat=disabled ;;
+    --enable-werror) printf "%s" -Dwerror=true ;;
+    --disable-werror) printf "%s" -Dwerror=false ;;
     --enable-whpx) printf "%s" -Dwhpx=enabled ;;
     --disable-whpx) printf "%s" -Dwhpx=disabled ;;
     --enable-xen) printf "%s" -Dxen=enabled ;;