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efi_loader helloworld.efi: Fix building with -Os

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Depending on your compiler, when compiling the hello world efi binary
with -Os, gcc might think it's a smart idea to replace common patterns
such as memory copies with explicit calls to memcpy().

While that sounds great at first, we don't have any memcpy() available
in our helloworld build target. So let's indicate to gcc that we really
do want to have the code be built as freestanding.

Fixes: bbf75dd9 ("efi_loader: output load options in helloworld")
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2017-12-01 22:09:50 +01:00
parent c034b7fd41
commit 3bb74f9800
1 changed files with 2 additions and 2 deletions
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4
lib/efi_loader/Makefile
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@ -7,8 +7,8 @@
# This file only gets included with CONFIG_EFI_LOADER set, so all
# object inclusion implicitly depends on it
CFLAGS_helloworld.o := $(CFLAGS_EFI)
CFLAGS_REMOVE_helloworld.o := $(CFLAGS_NON_EFI)
CFLAGS_helloworld.o := $(CFLAGS_EFI) -Os -ffreestanding
CFLAGS_REMOVE_helloworld.o := $(CFLAGS_NON_EFI) -Os
ifneq ($(CONFIG_CMD_BOOTEFI_HELLO_COMPILE),)
always += helloworld.efi