kbuild: add CONFIG_ prefix to USE_PRIVATE_LIBGCC

Before this commit, USE_PRIVATE_LIBGCC was defined in
arch-specific config.mk and referenced in
arch/$(ARCH)/lib/Makefile.

We are not happy about parsing config.mk again and again.
We have to keep the same behavior with a different way.

By adding "CONFIG_" prefix, this macro appears
in include/autoconf.mk, include/spl-autoconf.mk.
(And treating USE_PRIVATE_LIBGCC as CONFIG macro
is reasonable enough.)

Tegra SoC family defined USE_PRIVATE_LIBGCC as "yes"
in arch/arm/cpu/arm720t/tegra*/config.mk,
whereas did not define it in arch/arm/cpu/armv7/tegra*/config.mk.

It means Tegra enables PRIVATE_LIBGCC only for SPL.
We can describe the same behavior by adding

  #ifdef CONFIG_SPL_BUILD
  # define CONFIG_USE_PRIVATE_LIBGCC
  #endif

to include/configs/tegra-common.h.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Tom Warren <twarren@nvidia.com>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Stephen Warren <swarren@nvidia.com>

1 files changed, 2 insertions, 11 deletions

diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 45febcf..9fc81cd 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -5,17 +5,8 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-# Build private libgcc only when asked for
-ifdef USE_PRIVATE_LIBGCC
-lib-y	+= _ashldi3.o
-lib-y	+= _ashrdi3.o
-lib-y	+= _divsi3.o
-lib-y	+= _lshrdi3.o
-lib-y	+= _modsi3.o
-lib-y	+= _udivsi3.o
-lib-y	+= _umodsi3.o
-lib-y	+= div0.o
-endif
+lib-$(CONFIG_USE_PRIVATE_LIBGCC) += _ashldi3.o _ashrdi3.o _divsi3.o \
+			_lshrdi3.o _modsi3.o _udivsi3.o _umodsi3.o div0.o
 
 ifdef CONFIG_ARM64
 obj-y	+= crt0_64.o