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[u-boot,v2,24/38] ARM: fix LTO build for some thumb-interwork cases

Message ID 20210312103429.25895-25-marek.behun@nic.cz
State Superseded
Delegated to: Tom Rini
Headers show
Series U-Boot LTO (Sandbox + Some ARM boards) | expand

Commit Message

Marek Behún March 12, 2021, 10:34 a.m. UTC 
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 Behún <marek.behun@nic.cz>
---
 arch/arm/cpu/arm926ejs/Makefile | 2 ++
 arch/arm/lib/Makefile           | 1 +
 2 files changed, 3 insertions(+)
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Patch

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