[PATCH u-boot v3 38/39] ARM: don't use --gc-sections with LTO when using private libgcc

Marek Behún
2021-03-16T12:26:08Z

When using LTO, we can throw away the --gc-sections flag, but only if
using private libgcc.

When using system's libgcc, --gc-sections is still needed, otherwise
linking will fail due to undefined references to libc's symbols.

Signed-off-by: Marek Beh?n <marek.behun@nic.cz>
---
arch/arm/config.mk | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/arm/config.mk b/arch/arm/config.mk
index 2b2c6ad2e5..68745d489f 100644
--- a/arch/arm/config.mk
+++ b/arch/arm/config.mk
@@ -14,7 +14,9 @@ endif
CFLAGS_NON_EFI := -fno-pic -ffixed-r9 -ffunction-sections -fdata-sections
CFLAGS_EFI := -fpic -fshort-wchar

+ifneq ($(CONFIG_LTO)$(CONFIG_USE_PRIVATE_LIBGCC),yy)
LDFLAGS_FINAL += --gc-sections
+endif

ifndef CONFIG_LTO
PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections
--
2.26.2