How do I disable a build option on specific platforms?

m95d · November 27, 2022, 7:28pm

Package is tvheadend. On some platforms, it fails to build if "Optimize for speed" is selected. I want to remove or disable it for platforms that fail. The option is defined here (first one, after the comment):

github.com

openwrt/packages/blob/master/multimedia/tvheadend/Config.in

comment "Generic options"
  depends on PACKAGE_tvheadend

config TVHEADEND_OPTIMIZE_SPEED
  bool "Optimize for speed"
  depends on PACKAGE_tvheadend
  default n
  help
    Optimize tvheadend for speed instead of size. This option adds -O2 and LTO (Link Time Optimization).
    Note: No benchmarks were performed when this option was added. Speed improvements (if any) are not known.

config TVHEADEND_TRACE
  bool "Low level debug trace"
  depends on PACKAGE_tvheadend
  default n
  help
    Support low level debug trace for tvheadend subsystems.
    For a list of available subsystems, run "tvheadend --subsystems" in OpenWRT console.
    Note: Selecting this option does not automatically enable trace logging.
    It only includes support for --trace command line option and GUI.

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How do I make that option dependent on platform?

Thanks.

hnyman · November 27, 2022, 8:18pm

Negative example:

github.com

openwrt/openwrt/blob/a06e023b4e124dad2b2ddf3db87cb804b7043b26/package/kernel/mac80211/broadcom.mk#L118


      
            FILES:=$(PKG_BUILD_DIR)/drivers/net/wireless/broadcom/b43/b43.ko
            AUTOLOAD:=$(call AutoProbe,b43)
            MENU:=1
          endef
          
          
define KernelPackage/b43/config
          
          
config PACKAGE_B43_USE_SSB
          	select PACKAGE_kmod-ssb
          	tristate
          	depends on !TARGET_bcm47xx && !TARGET_bcm63xx
          	default PACKAGE_kmod-b43 if PACKAGE_B43_BUSES_BCMA_AND_SSB
          	default PACKAGE_kmod-b43 if PACKAGE_B43_BUSES_SSB
          
          
config PACKAGE_B43_USE_BCMA
          	select PACKAGE_kmod-bcma
          	tristate
          	depends on !TARGET_bcm47xx && !TARGET_bcm53xx
          	default PACKAGE_kmod-b43 if PACKAGE_B43_BUSES_BCMA_AND_SSB
          	default PACKAGE_kmod-b43 if PACKAGE_B43_BUSES_BCMA

Positive example:

github.com

openwrt/openwrt/blob/b21ddbfa18cd1e437e31dc0fa29408721a186c2a/toolchain/Config.in#L30


      
          		help
          		  If your target CPU does not have a Floating Point Unit (FPU) or a
          		  kernel FPU emulator, but you still wish to support floating point
          		  functions, then everything will need to be compiled with soft floating
          		  point support (-msoft-float).
          
          
		  Most people will answer N.
          
          
	config USE_MIPS16
          		bool "Build packages with MIPS16 instructions" if TARGET_OPTIONS
          		depends on HAS_MIPS16
          		default y
          		help
          		  If your target CPU does support the MIPS16 instruction set
          		  and you want to use it for packages, enable this option.
          		  MIPS16 produces smaller binaries thus reducing pressure on
          		  caches and TLB.
          
          
		  Most people will answer N.

github.com

openwrt/openwrt/blob/ec6293febc244d187e71a6e54f44920be679cde4/package/kernel/lantiq/ltq-vmmc/Config.in#L10


      
          choice
          	prompt "device selection"
          	depends on PACKAGE_kmod-ltq-vmmc
          	default VOICE_CPE_VMMC_WITH_DEVICE_DANUBE
          	help
          		Select the target device.
          
          
	config VOICE_CPE_VMMC_WITH_DEVICE_DANUBE
          		bool "Danube, Twinpass, Vinax"
          		depends on TARGET_lantiq_xway
          
          
#	config VOICE_CPE_VMMC_WITH_DEVICE_AR9
          #		bool "AR9 family"
          #		depends on TARGET_lantiq_ar9
          
          
	config VOICE_CPE_VMMC_WITH_DEVICE_VR9
          		bool "VR9 family"
          		depends on TARGET_lantiq_xrx200
          	
          	config VOICE_VMMC_WITH_DEVICE_FALCON

system · December 7, 2022, 8:18pm

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