meson: convert pc-bios/keymaps/Makefile

diff --git a/Makefile b/Makefile
index 8373ddccc9..ef28ce0361 100644
--- a/Makefile
+++ b/Makefile
@@ -229,11 +229,6 @@  distclean: clean ninja-distclean
 	rm -f linux-headers/asm
 	rm -Rf .sdk
 
-KEYMAPS=da     en-gb  et  fr     fr-ch  is  lt  no  pt-br  sv \
-ar      de     en-us  fi  fr-be  hr     it  lv  nl         pl  ru     th \
-de-ch  es     fo  fr-ca  hu     ja  mk  pt  sl     tr \
-bepo    cz
-
 ifdef INSTALL_BLOBS
 BLOBS=bios.bin bios-256k.bin bios-microvm.bin sgabios.bin vgabios.bin vgabios-cirrus.bin \
 vgabios-stdvga.bin vgabios-vmware.bin vgabios-qxl.bin vgabios-virtio.bin \
@@ -298,9 +293,6 @@  endif
 	$(INSTALL_DATA) $(SRC_PATH)/ui/qemu.desktop \
 		"$(DESTDIR)$(qemu_desktopdir)/qemu.desktop"
 	$(INSTALL_DIR) "$(DESTDIR)$(qemu_datadir)/keymaps"
-	set -e; for x in $(KEYMAPS); do \
-		$(INSTALL_DATA) $(SRC_PATH)/pc-bios/keymaps/$$x "$(DESTDIR)$(qemu_datadir)/keymaps"; \
-	done
 
 ifdef CONFIG_WIN32
 
diff --git a/meson.build b/meson.build
index 808f50b07e..dd8016c9da 100644
--- a/meson.build
+++ b/meson.build
@@ -1062,6 +1062,12 @@  if 'CONFIG_GUEST_AGENT' in config_host
   subdir('qga')
 endif
 
+if 'CONFIG_XKBCOMMON' in config_host
+  # used for the update-keymaps target, so include rules even if !have_tools
+  qemu_keymap = executable('qemu-keymap', files('qemu-keymap.c', 'ui/input-keymap.c') + genh,
+                           dependencies: [qemuutil, xkbcommon], install: have_tools)
+endif
+
 if have_tools
   qemu_img = executable('qemu-img', [files('qemu-img.c'), hxdep],
              dependencies: [authz, block, crypto, io, qom, qemuutil], install: true)
@@ -1078,11 +1084,6 @@  if have_tools
   subdir('contrib/rdmacm-mux')
   subdir('contrib/elf2dmp')
 
-  if 'CONFIG_XKBCOMMON' in config_host
-    executable('qemu-keymap', files('qemu-keymap.c', 'ui/input-keymap.c'),
-               dependencies: [qemuutil, xkbcommon], install: true)
-  endif
-
   executable('qemu-edid', files('qemu-edid.c', 'hw/display/edid-generate.c'),
              dependencies: qemuutil,
              install: true)
diff --git a/pc-bios/keymaps/.gitignore b/pc-bios/keymaps/.gitignore
new file mode 100644
index 0000000000..f90738f4dc
--- /dev/null
+++ b/pc-bios/keymaps/.gitignore
@@ -0,0 +1 @@ 
+/*.stamp
diff --git a/pc-bios/keymaps/Makefile b/pc-bios/keymaps/Makefile
deleted file mode 100644
index 76217b0689..0000000000
--- a/pc-bios/keymaps/Makefile
+++ /dev/null
@@ -1,56 +0,0 @@ 
-
-KEYMAP	:= $(shell which qemu-keymap 2>/dev/null)
-
-MAPS	:= ar bepo cz da de de-ch en-us en-gb es et fi fo \
-	   fr fr-be fr-ca fr-ch \
-	   hr hu is it ja lt lv mk nl no pl pt pt-br ru th tr
-
-ar	: MAP_FLAGS :=	-l ar
-bepo	: MAP_FLAGS :=	-l fr -v dvorak
-cz	: MAP_FLAGS :=	-l cz
-da	: MAP_FLAGS :=	-l dk
-de	: MAP_FLAGS :=	-l de -v nodeadkeys
-de-ch	: MAP_FLAGS :=	-l ch
-en-us	: MAP_FLAGS :=	-l us
-en-gb	: MAP_FLAGS :=	-l gb
-es	: MAP_FLAGS :=	-l es
-et	: MAP_FLAGS :=	-l et
-fi	: MAP_FLAGS :=	-l fi
-fo	: MAP_FLAGS :=	-l fo
-fr	: MAP_FLAGS :=	-l fr -v nodeadkeys
-fr-be	: MAP_FLAGS :=	-l be
-fr-ca	: MAP_FLAGS :=	-l ca -v fr
-fr-ch	: MAP_FLAGS :=	-l ch -v fr
-hr	: MAP_FLAGS :=	-l hr
-hu	: MAP_FLAGS :=	-l hu
-is	: MAP_FLAGS :=	-l is
-it	: MAP_FLAGS :=	-l it
-ja	: MAP_FLAGS :=	-l jp -m jp106
-lt	: MAP_FLAGS :=	-l lt
-lv	: MAP_FLAGS :=	-l lv
-mk	: MAP_FLAGS :=	-l mk
-nl	: MAP_FLAGS :=	-l nl
-no	: MAP_FLAGS :=	-l no
-pl	: MAP_FLAGS :=	-l pl
-pt	: MAP_FLAGS :=	-l pt
-pt-br	: MAP_FLAGS :=	-l br
-ru	: MAP_FLAGS :=	-l ru
-th	: MAP_FLAGS :=	-l th
-tr	: MAP_FLAGS :=	-l tr
-
-ifeq ($(KEYMAP),)
-
-all:
-	@echo "nothing to do (qemu-keymap not found)"
-
-else
-
-all: $(MAPS)
-
-clean:
-	rm -f $(MAPS)
-
-$(MAPS): $(KEYMAP) Makefile
-	$(KEYMAP) -f $@ $(MAP_FLAGS)
-
-endif
diff --git a/pc-bios/keymaps/meson.build b/pc-bios/keymaps/meson.build
new file mode 100644
index 0000000000..b737c82230
--- /dev/null
+++ b/pc-bios/keymaps/meson.build
@@ -0,0 +1,56 @@ 
+keymaps = {
+  'ar': '-l ar',
+  'bepo': '-l fr -v dvorak',
+  'cz': '-l cz',
+  'da': '-l dk',
+  'de': '-l de -v nodeadkeys',
+  'de-ch': '-l ch',
+  'en-gb': '-l gb',
+  'en-us': '-l us',
+  'es': '-l es',
+  'et': '-l et',
+  'fi': '-l fi',
+  'fo': '-l fo',
+  'fr': '-l fr -v nodeadkeys',
+  'fr-be': '-l be',
+  'fr-ca': '-l ca -v fr',
+  'fr-ch': '-l ch -v fr',
+  'hr': '-l hr',
+  'hu': '-l hu',
+  'is': '-l is',
+  'it': '-l it',
+  'ja': '-l jp -m jp106',
+  'lt': '-l lt',
+  'lv': '-l lv',
+  'mk': '-l mk',
+  'nl': '-l nl',
+  'no': '-l no',
+  'pl': '-l pl',
+  'pt': '-l pt',
+  'pt-br': '-l br',
+  'ru': '-l ru',
+  'th': '-l th',
+  'tr': '-l tr',
+}
+
+if meson.is_cross_build() or 'CONFIG_XKBCOMMON' not in config_host
+  native_qemu_keymap = find_program('qemu-keymap', required: false, disabler: true)
+else
+  native_qemu_keymap = qemu_keymap
+endif
+t = []
+foreach km, args: keymaps
+  t += custom_target(km,
+                     build_by_default: true,
+                     output: km,
+                     command: [native_qemu_keymap, '-f', '@OUTPUT@', args.split()],
+                     install_dir: config_host['qemu_datadir'] / 'keymaps')
+endforeach
+if t.length() > 0
+  alias_target('update-keymaps', t)
+else
+  # install from the source tree
+  install_data(keymaps.keys(), install_dir: config_host['qemu_datadir'] / 'keymaps')
+endif
+
+install_data(['sl', 'sv'], install_dir: config_host['qemu_datadir'] / 'keymaps')
diff --git a/pc-bios/meson.build b/pc-bios/meson.build
index 6e3bfe3ca4..b6389f5148 100644
--- a/pc-bios/meson.build
+++ b/pc-bios/meson.build
@@ -25,3 +25,4 @@  if 'DECOMPRESS_EDK2_BLOBS' in config_host
 endif
 
 subdir('descriptors')
+subdir('keymaps')
diff --git a/ui/meson.build b/ui/meson.build
index 6f74d30ea0..6bf398213f 100644
--- a/ui/meson.build
+++ b/ui/meson.build
@@ -95,7 +95,7 @@  keymaps = [
   ['osx', 'qcode'],
 ]
 
-if have_system
+if have_system or have_tools
   foreach e : keymaps
     output = 'input-keymap-@0@-to-@1@.c.inc'.format(e[0], e[1])
     genh += custom_target(output,