[Buildroot] [PATCH 13/36] package/qemu: add fine-grained target selection

@@ -24,6 +24,25 @@ if BR2_PACKAGE_QEMU
 
 comment "Emulators selection"
 
+config BR2_PACKAGE_QEMU_CUSTOM_TARGETS
+	string "Enable specific targets"
+	help
+	  Enter here the list of QEMU targets you want to build. For example:
+
+	    System emulation      | User-land emulation
+	    ----------------------+-----------------------
+	    i386-softmmu          | i386-linux-user
+	    arm-softmmu           | ppc-linux-user
+	    x86_64-softmmu        | sparc-bsd-user
+	    ...                   | ...
+
+config QEMU_FOO
+	bool # To break the indentation
+
+if BR2_PACKAGE_QEMU_CUSTOM_TARGETS = ""
+
+comment "... or you can select emulator families to enable, below:"
+
 # We need at least one to be selected
 config BR2_PACKAGE_QEMU_EMUL_SET
 	bool

@@ -51,6 +70,8 @@ config BR2_PACKAGE_QEMU_BSD_USER
 	help
 	  Say 'y' to build all BSD user-land emulators that QEMU supports.
 
+endif # BR2_PACKAGE_QEMU_CUSTOM_TARGETS == ""
+
 endif # BR2_PACKAGE_QEMU
 
 comment "QEMU requires python"

@@ -43,6 +43,10 @@ else
 QEMU_OPTS += --disable-bsd-user
 endif
 
+ifneq ($(call qstrip,$(BR2_PACKAGE_QEMU_CUSTOM_TARGETS)),)
+QEMU_OPTS += --target-list="$(call qstrip,$(BR2_PACKAGE_QEMU_CUSTOM_TARGETS))"
+endif
+
 #----------------------------------------------------------------------------
 # Package build process