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Add SYSROOT, EXTRA_{LDFLAGS,LDLIBS} config opts; sample Android NDK config

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Signed-off-by: Rob Walker <rwalker@rwalker.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Rob Walker 2012-03-07 12:25:53 +01:00 committed by Denys Vlasenko
parent 69d81a1c1b
commit bf6343796e
3 changed files with 1058 additions and 0 deletions
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27
Config.in
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@ -600,12 +600,39 @@ config CROSS_COMPILER_PREFIX
Native builds leave this empty. Native builds leave this empty.
config SYSROOT
string "Path to sysroot"
default ""
help
If you want to build BusyBox with a cross compiler, then you
might also need to specify where /usr/include and /usr/lib
will be found.
For example, BusyBox can be built against an installed
Android NDK, platform version 9, for ARM ABI with
CONFIG_SYSROOT=/opt/android-ndk/platforms/android-9/arch-arm
Native builds leave this empty.
config EXTRA_CFLAGS config EXTRA_CFLAGS
string "Additional CFLAGS" string "Additional CFLAGS"
default "" default ""
help help
Additional CFLAGS to pass to the compiler verbatim. Additional CFLAGS to pass to the compiler verbatim.
config EXTRA_LDFLAGS
string "Additional LDFLAGS"
default ""
help
Additional LDFLAGS to pass to the linker verbatim.
config EXTRA_LDLIBS
string "Additional LDLIBS"
default ""
help
Additional LDLIBS to pass to the linker with -l.
endmenu endmenu
menu 'Debugging Options' menu 'Debugging Options'

15
Makefile.flags
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@ -104,6 +104,11 @@ else
LDLIBS += m LDLIBS += m
endif endif
ifneq ($(CONFIG_SYSROOT),)
CFLAGS += --sysroot=$(CONFIG_SYSROOT)
export SYSROOT=$(CONFIG_SYSROOT)
endif
ifeq ($(CONFIG_PAM),y) ifeq ($(CONFIG_PAM),y)
# libpam uses libpthread, so for static builds busybox must be linked to # libpam uses libpthread, so for static builds busybox must be linked to
# libpthread. On some platforms that requires an explicit -lpthread, so # libpthread. On some platforms that requires an explicit -lpthread, so
@ -137,6 +142,16 @@ ifneq (,$(findstring $(W_ELF2FLT),$(LDFLAGS) $(CFLAGS_busybox)))
SKIP_STRIP = y SKIP_STRIP = y
endif endif
ifneq ($(CONFIG_EXTRA_LDFLAGS),)
EXTRA_LDFLAGS += $(strip $(subst ",,$(CONFIG_EXTRA_LDFLAGS)))
#"))
endif
ifneq ($(CONFIG_EXTRA_LDLIBS),)
LDLIBS += $(strip $(subst ",,$(CONFIG_EXTRA_LDLIBS)))
#"))
endif
# Busybox is a stack-fatty so make sure we increase default size # Busybox is a stack-fatty so make sure we increase default size
# TODO: use "make stksizes" to find & fix big stack users # TODO: use "make stksizes" to find & fix big stack users
# (we stole scripts/checkstack.pl from the kernel... thanks guys!) # (we stole scripts/checkstack.pl from the kernel... thanks guys!)

1016
configs/android_ndk_defconfig Normal file
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