roms: Add a 'make help' target alias

Various C projects provide a 'make help' target. Our root directory
does so. The roms/ directory lacks a such rule, but already displays
a help output when the default target is called.
Add a 'help' target aliased to the default one, to avoid:

  $ make -C roms help
  make: *** No rule to make target 'help'.  Stop.
Reviewed-by: default avatarJohn Snow <>
Reviewed-by: default avatarLaszlo Ersek <>
Message-Id: <>
Signed-off-by: default avatarPhilippe Mathieu-Daudé <>
parent f3e330e3
......@@ -51,7 +51,7 @@ SEABIOS_EXTRAVERSION=""
EDK2_EFIROM = edk2/BaseTools/Source/C/bin/EfiRom
default help:
@echo "nothing is build by default"
@echo "available build targets:"
@echo " bios -- update bios.bin (seabios)"
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