Commit 402928b5 authored by Michael Ellerman's avatar Michael Ellerman
Browse files

powerpc/Makefile: Auto detect cross compiler 



If no cross compiler is specified, try to auto detect one.

Look for various combinations, matching:
  powerpc(64(le)?)?(-unknown)?-linux(-gnu)?-

There are more possibilities, but the above is known to find a compiler
on Fedora and Ubuntu (which use linux-gnu-), and also detects the
kernel.org cross compilers (which use linux-).

This allows cross compiling with simply:

 # Ubuntu
 $ sudo apt install gcc-powerpc-linux-gnu
 # Fedora
 $ sudo dnf install gcc-powerpc64-linux-gnu

 $ make ARCH=powerpc defconfig
 $ make ARCH=powerpc -j 4

Inspired by arch/parisc/Makefile.

Acked-by: default avatarSegher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231206115548.1466874-4-mpe@ellerman.id.au
parent 22f17b02

arch/powerpc/Makefile

+11 −0
Original line number Diff line number Diff line
@@ -10,6 +10,17 @@ 
# Rewritten by Cort Dougan and Paul Mackerras

#



ifdef cross_compiling

  ifeq ($(CROSS_COMPILE),)

    # Auto detect cross compiler prefix.

    # Look for: (powerpc(64(le)?)?)(-unknown)?-linux(-gnu)?-

    CC_ARCHES := powerpc powerpc64 powerpc64le

    CC_SUFFIXES := linux linux-gnu unknown-linux-gnu

    CROSS_COMPILE := $(call cc-cross-prefix, $(foreach a,$(CC_ARCHES), \

                       $(foreach s,$(CC_SUFFIXES),$(a)-$(s)-)))

  endif

endif



HAS_BIARCH	:= $(call cc-option-yn, -m32)



# Set default 32 bits cross compilers for vdso and boot wrapper