[PATCH u-boot v3 25/39] ARM: fix LTO build for some thumb-interwork cases

Marek Behún
2021-03-16T12:25:55Z

Fix LTO build for some thumb-interwork usecases (such as for
da850evm_defconfig), where inline assmebly such as
mrc p15,0,r2,c1,c0,0
causes the compiler to fail during LTO linking with
Error: selected processor does not support `mrc p15,0,r2,c1,c0,0'
in Thumb mode

Signed-off-by: Marek Beh?n <marek.behun@nic.cz>
---
arch/arm/cpu/arm926ejs/Makefile | 2 ++
arch/arm/lib/Makefile | 1 +
2 files changed, 3 insertions(+)

diff --git a/arch/arm/cpu/arm926ejs/Makefile b/arch/arm/cpu/arm926ejs/Makefile
index af63d5cc5e..98aafe805a 100644
--- a/arch/arm/cpu/arm926ejs/Makefile
+++ b/arch/arm/cpu/arm926ejs/Makefile
@@ -25,6 +25,8 @@ ifndef CONFIG_HAS_THUMB2

CFLAGS_cpu.o := -marm
CFLAGS_cache.o := -marm
+CFLAGS_REMOVE_cpu.o := $(LTO_CFLAGS)
+CFLAGS_REMOVE_cache.o := $(LTO_CFLAGS)

endif
endif
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 27b12e7f2b..61bef1d5af 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -64,6 +64,7 @@ endif

obj-y += cache.o
obj-$(CONFIG_SYS_ARM_CACHE_CP15) += cache-cp15.o
+CFLAGS_REMOVE_cache-cp15.o := $(LTO_CFLAGS)

obj-y += psci-dt.o

--
2.26.2