roms: enable parallel builds for 'make lgplvgabios'

Recurse into vgabios once, adjust dependencies, call make using
$(MAKE) $(MAKEFLAGS) so jobserver mode works.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

diff --git a/roms/Makefile b/roms/Makefile
index b64606067b4a9f512dedb71e6e2ee4e3f2c08c47..6d4330fb26a5bbde0b919abf9f0fa7cf0042ec8a 100644 (file)
--- a/roms/Makefile
+++ b/roms/Makefile
@@ -1,5 +1,6 @@
 
 vgabios_variants := stdvga cirrus vmware qxl
+vgabios_targets  := $(patsubst %,vgabios-%.bin,$(vgabios_variants))
 pxerom_variants  := e1000 eepro100 ne2k_pci pcnet rtl8139 virtio
 
 pxe-rom-e1000    efi-rom-e1000    : VID := 8086
@@ -49,12 +50,16 @@ seavgabios-%: config.vga.%
        make -C seabios out/vgabios.bin
        cp seabios/out/vgabios.bin ../pc-bios/vgabios-$*.bin
 
+
 lgplvgabios: $(patsubst %,lgplvgabios-%,$(vgabios_variants))
 
-lgplvgabios-%:
-       make -C vgabios vgabios-$*.bin
+lgplvgabios-%: build-lgplvgabios
        cp vgabios/VGABIOS-lgpl-latest.$*.bin ../pc-bios/vgabios-$*.bin
 
+build-lgplvgabios:
+       $(MAKE) $(MAKEFLAGS) -C vgabios $(vgabios_targets)
+
+
 pxerom: $(patsubst %,pxe-rom-%,$(pxerom_variants))
 
 pxe-rom-%: ipxe/src/config/local/general.h