[U-Boot] [PATCH 2/3] efi_loader: use freestanding library for efi apps

[Heinrich Schuchardt]

GCC requires that freestanding programs provide memcpy(), memmove(),
memset(), and memcmp().

Add the library functions when building a *.efi files.

The EFI selftests might use other compilation flags. So use a symbolic
link to provide lib/efi_selftest/efi_freestanding.c and compile it
separately.

Reported-by: Alexander Graf <agraf at suse.de>
Fixes: 5be444d14b38 ("efi_loader: consistent build flags for EFI applications")
Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 lib/efi_selftest/efi_freestanding.c | 1 +
 scripts/Makefile.lib                | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)
 create mode 120000 lib/efi_selftest/efi_freestanding.c

diff --git a/lib/efi_selftest/efi_freestanding.c b/lib/efi_selftest/efi_freestanding.c
new file mode 120000
index 0000000000..4b7edd52bd
--- /dev/null
+++ b/lib/efi_selftest/efi_freestanding.c
@@ -0,0 +1 @@
+../efi_loader/efi_freestanding.c
\ No newline at end of file
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index a5b57fc6b9..4facb76ace 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -389,7 +389,7 @@ $(obj)/efi_reloc.o: $(srctree)/arch/$(ARCH)/lib/$(EFI_RELOC:.o=.c) $(recordmcoun
 	$(call cmd,force_checksrc)
 	$(call if_changed_rule,cc_o_c)
 
-$(obj)/%_efi.so: $(obj)/%.o $(obj)/efi_crt0.o $(obj)/efi_reloc.o
+$(obj)/%_efi.so: $(obj)/%.o $(obj)/efi_crt0.o $(obj)/efi_reloc.o $(obj)/efi_freestanding.o
 	$(call cmd,efi_ld)
 
 # ACPI
-- 
2.20.1