package/qemu: add option to install blobs

Binary blobs are BIOS of some sorts for the various machines emulated
by QEMU. There is no option to individually install blobs; it's an
all-or-nothing option.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/qemu/Config.in

@@ -58,6 +58,17 @@ config BR2_PACKAGE_QEMU_SYSTEM
 
 if BR2_PACKAGE_QEMU_SYSTEM
 
+config BR2_PACKAGE_QEMU_BLOBS
+	bool "Install binary blobs"
+	default y
+	help
+	  Say 'y' here (the default) to install binary blobs (such as
+	  BIOS or firmwares for the different machines simulated by
+	  QEMU). Say 'n' to not install those blobs.
+
+	  Note: Some machines may be unbootable without those blobs.
+	  If unsure, say 'y'.
+
 config BR2_PACKAGE_QEMU_SLIRP
 	bool "Enable user mode networking (SLIRP)"
 	select BR2_PACKAGE_SLIRP

package/qemu/qemu.mk

@@ -246,6 +246,12 @@ ifeq ($(BR2_STATIC_LIBS),y)
 QEMU_OPTS += --static
 endif
 
+ifeq ($(BR2_PACKAGE_QEMU_BLOBS),y)
+QEMU_OPTS += --enable-install-blobs
+else
+QEMU_OPTS += --disable-install-blobs
+endif
+
 # Override CPP, as it expects to be able to call it like it'd
 # call the compiler.
 define QEMU_CONFIGURE_CMDS