LLVMInitializeAMDGPU* functions need to be explicitly declared
and mesa expects them via <llvm-c/Target.h> header,
but LLVM needs to be instructed to invoke its own LLVM_TARGET(AMDGPU) macro,
or the functions will not be available.
A new llvm cflag (-DFORCE_BUILD_AMDGPU) serves this purpose,
the same mechanism is used also by other llvm targets e.g. FORCE_BUILD_ARM
A necessary prerequisite is to have AMDGPU target handled accordingly
in llvm config files i.e. {Target,AsmParser,AsmPrinter}.def
for llvm device build includes.
This avoids the following building errors:
external/mesa/src/gallium/drivers/radeon/radeon_llvm_emit.c:121:2: error:
implicit declaration of function 'LLVMInitializeAMDGPUTargetInfo'
[-Werror=implicit-function-declaration]
LLVMInitializeAMDGPUTargetInfo();
^
external/mesa/src/gallium/drivers/radeon/radeon_llvm_emit.c:122:2: error:
implicit declaration of function 'LLVMInitializeAMDGPUTarget'
[-Werror=implicit-function-declaration]
LLVMInitializeAMDGPUTarget();
^
external/mesa/src/gallium/drivers/radeon/radeon_llvm_emit.c:123:2: error:
implicit declaration of function 'LLVMInitializeAMDGPUTargetMC'
[-Werror=implicit-function-declaration]
LLVMInitializeAMDGPUTargetMC();
^
external/mesa/src/gallium/drivers/radeon/radeon_llvm_emit.c:124:2: error:
implicit declaration of function 'LLVMInitializeAMDGPUAsmPrinter'
[-Werror=implicit-function-declaration]
LLVMInitializeAMDGPUAsmPrinter();
^
---
src/gallium/drivers/radeon/Android.mk | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/gallium/drivers/radeon/Android.mk
b/src/gallium/drivers/radeon/Android.mk
index 2f72f1f..31eaa16 100644
--- a/src/gallium/drivers/radeon/Android.mk
+++ b/src/gallium/drivers/radeon/Android.mk
@@ -32,6 +32,7 @@ LOCAL_SRC_FILES := $(C_SOURCES)
ifeq ($(MESA_ENABLE_LLVM),true)
LOCAL_SRC_FILES += $(LLVM_C_FILES)
+LOCAL_CFLAGS += -DFORCE_BUILD_AMDGPU # instructs LLVM to declare
LLVMInitializeAMDGPU* functions
endif
LOCAL_SHARED_LIBRARIES := libdrm_radeon
--
2.9.3
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