meson, configure: move --interp-prefix to meson

This is the last CONFIG_* entry in config-host.mak that had to be
special cased.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

configure

@@ -231,7 +231,6 @@ fi
 
 # default parameters
 cpu=""
-interp_prefix="/usr/gnemul/qemu-%M"
 static="no"
 cross_compile="no"
 cross_prefix=""
@@ -697,8 +696,6 @@ for opt do
   ;;
   --prefix=*) prefix="$optarg"
   ;;
-  --interp-prefix=*) interp_prefix="$optarg"
-  ;;
   --cross-prefix=*)
   ;;
   --cc=*)
@@ -1091,8 +1088,6 @@ Options: [defaults in brackets after descriptions]
 Standard options:
   --help                   print this message
   --prefix=PREFIX          install in PREFIX [$prefix]
-  --interp-prefix=PREFIX   where to find shared libraries, etc.
-                           use %M for cpu name [$interp_prefix]
   --target-list=LIST       set target list (default: build all)
 $(echo Available targets: $default_target_list | \
   fold -s -w 53 | sed -e 's/^/                           /')
@@ -2289,7 +2284,6 @@ for target in $target_list; do
     esac
 done
 
-echo "CONFIG_QEMU_INTERP_PREFIX=$interp_prefix" | sed 's/%M/@0@/' >> $config_host_mak
 if test "$default_targets" = "yes"; then
   echo "CONFIG_DEFAULT_TARGETS=y" >> $config_host_mak
 fi

meson.build

@@ -2227,10 +2227,8 @@ if targetos == 'windows' and link_language == 'cpp'
 endif
 config_host_data.set('HAVE_VSS_SDK', have_vss_sdk)
 
-ignored = ['CONFIG_QEMU_INTERP_PREFIX', # actually per-target
-    'HAVE_GDB_BIN']
 foreach k, v: config_host
-  if k.startswith('CONFIG_') and not ignored.contains(k)
+  if k.startswith('CONFIG_')
     config_host_data.set(k, v == 'y' ? 1 : v)
   endif
 endforeach
@@ -2336,7 +2334,7 @@ foreach target : target_dirs
     config_target += {
       'CONFIG_USER_ONLY': 'y',
       'CONFIG_QEMU_INTERP_PREFIX':
-        config_host['CONFIG_QEMU_INTERP_PREFIX'].format(config_target['TARGET_NAME'])
+        get_option('interp_prefix').replace('%M', config_target['TARGET_NAME'])
     }
   endif
 

meson_options.txt

@@ -27,6 +27,8 @@ option('block_drv_rw_whitelist', type : 'string', value : '',
        description: 'set block driver read-write whitelist (by default affects only QEMU, not tools like qemu-img)')
 option('block_drv_ro_whitelist', type : 'string', value : '',
        description: 'set block driver read-only whitelist (by default affects only QEMU, not tools like qemu-img)')
+option('interp_prefix', type : 'string', value : '/usr/gnemul/qemu-%M',
+       description: 'where to find shared libraries etc., use %M for cpu name')
 option('fuzzing_engine', type : 'string', value : '',
        description: 'fuzzing engine library for OSS-Fuzz')
 option('trace_file', type: 'string', value: 'trace',

scripts/meson-buildoptions.sh

@@ -41,6 +41,8 @@ meson_options_help() {
   printf "%s\n" '                           Set available tracing backends [log] (choices:'
   printf "%s\n" '                           dtrace/ftrace/log/nop/simple/syslog/ust)'
   printf "%s\n" '  --iasl=VALUE             Path to ACPI disassembler'
+  printf "%s\n" '  --interp-prefix=VALUE    where to find shared libraries etc., use %M for'
+  printf "%s\n" '                           cpu name [/usr/gnemul/qemu-%M]'
   printf "%s\n" '  --sphinx-build=VALUE     Use specified sphinx-build for building document'
   printf "%s\n" '  --tls-priority=VALUE     Default TLS protocol/cipher priority string'
   printf "%s\n" '                           [NORMAL]'
@@ -252,6 +254,7 @@ _meson_option_parse() {
     --disable-iconv) printf "%s" -Diconv=disabled ;;
     --enable-install-blobs) printf "%s" -Dinstall_blobs=true ;;
     --disable-install-blobs) printf "%s" -Dinstall_blobs=false ;;
+    --interp-prefix=*) quote_sh "-Dinterp_prefix=$2" ;;
     --enable-jack) printf "%s" -Djack=enabled ;;
     --disable-jack) printf "%s" -Djack=disabled ;;
     --enable-keyring) printf "%s" -Dkeyring=enabled ;;