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efi: Makefile: Export variables for use with EFI

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When building an EFI app we need three things:

   - start-up code
   - relocation code
   - link script

These are all different for each architecture. We also need special
compiler flags in some cases.

Add top-level Makefile variables for these along with documentation.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Simon Glass 2016-11-07 08:47:07 -07:00 committed by Alexander Graf
parent 5abd9137d5
commit bb1ae55948
1 changed files with 9 additions and 0 deletions
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Makefile
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@ -527,6 +527,15 @@ endif
endif
endif
# These are set by the arch-specific config.mk. Make sure they are exported
# so they can be used when building an EFI application.
export EFI_LDS # Filename of EFI link script in arch/$(ARCH)/lib
export EFI_CRT0 # Filename of EFI CRT0 in arch/$(ARCH)/lib
export EFI_RELOC # Filename of EFU relocation code in arch/$(ARCH)/lib
export CFLAGS_EFI # Compiler flags to add when building EFI app
export CFLAGS_NON_EFI # Compiler flags to remove when building EFI app
export EFI_TARGET # binutils target if EFI is natively supported
# If board code explicitly specified LDSCRIPT or CONFIG_SYS_LDSCRIPT, use
# that (or fail if absent). Otherwise, search for a linker script in a
# standard location.