有人有 CMakeList.txt 文件的示例来编译一个简单的“hello world”英特尔 SGX 应用程序吗？
GitHub 上有一些示例（如here），但它们都是相当高级的应用程序。
更具体地说，有人可以帮我将以下 makefile 翻译为 CMakeList.txt:
# Copyright (C) 2011-2018 Intel Corporation. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Intel Corporation nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#
######## SGX SDK Settings ########
SGX_SDK ?= /opt/intel/sgxsdk
SGX_MODE ?= HW
SGX_ARCH ?= x64
SGX_DEBUG ?= 1
ifeq ($(shell getconf LONG_BIT), 32)
SGX_ARCH := x86
else ifeq ($(findstring -m32, $(CXXFLAGS)), -m32)
SGX_ARCH := x86
endif
ifeq ($(SGX_ARCH), x86)
SGX_COMMON_CFLAGS := -m32
SGX_LIBRARY_PATH := $(SGX_SDK)/lib
SGX_ENCLAVE_SIGNER := $(SGX_SDK)/bin/x86/sgx_sign
SGX_EDGER8R := $(SGX_SDK)/bin/x86/sgx_edger8r
else
SGX_COMMON_CFLAGS := -m64
SGX_LIBRARY_PATH := $(SGX_SDK)/lib64
SGX_ENCLAVE_SIGNER := $(SGX_SDK)/bin/x64/sgx_sign
SGX_EDGER8R := $(SGX_SDK)/bin/x64/sgx_edger8r
endif
ifeq ($(SGX_DEBUG), 1)
ifeq ($(SGX_PRERELEASE), 1)
$(error Cannot set SGX_DEBUG and SGX_PRERELEASE at the same time!!)
endif
endif
ifeq ($(SGX_DEBUG), 1)
SGX_COMMON_CFLAGS += -O0 -g
else
SGX_COMMON_CFLAGS += -O2
endif
######## App Settings ########
ifneq ($(SGX_MODE), HW)
Urts_Library_Name := sgx_urts_sim
else
Urts_Library_Name := sgx_urts
endif
App_Cpp_Files := App/App.cpp $(wildcard App/Edger8rSyntax/*.cpp) $(wildcard App/TrustedLibrary/*.cpp)
App_Include_Paths := -IInclude -IApp -I$(SGX_SDK)/include
App_C_Flags := $(SGX_COMMON_CFLAGS) -fPIC -Wno-attributes $(App_Include_Paths)
# Three configuration modes - Debug, prerelease, release
# Debug - Macro DEBUG enabled.
# Prerelease - Macro NDEBUG and EDEBUG enabled.
# Release - Macro NDEBUG enabled.
ifeq ($(SGX_DEBUG), 1)
App_C_Flags += -DDEBUG -UNDEBUG -UEDEBUG
else ifeq ($(SGX_PRERELEASE), 1)
App_C_Flags += -DNDEBUG -DEDEBUG -UDEBUG
else
App_C_Flags += -DNDEBUG -UEDEBUG -UDEBUG
endif
App_Cpp_Flags := $(App_C_Flags) -std=c++11
App_Link_Flags := $(SGX_COMMON_CFLAGS) -L$(SGX_LIBRARY_PATH) -l$(Urts_Library_Name) -lpthread
ifneq ($(SGX_MODE), HW)
App_Link_Flags += -lsgx_uae_service_sim
else
App_Link_Flags += -lsgx_uae_service
endif
App_Cpp_Objects := $(App_Cpp_Files:.cpp=.o)
App_Name := app
######## Enclave Settings ########
ifneq ($(SGX_MODE), HW)
Trts_Library_Name := sgx_trts_sim
Service_Library_Name := sgx_tservice_sim
else
Trts_Library_Name := sgx_trts
Service_Library_Name := sgx_tservice
endif
Crypto_Library_Name := sgx_tcrypto
Enclave_Cpp_Files := Enclave/Enclave.cpp $(wildcard Enclave/Edger8rSyntax/*.cpp) $(wildcard Enclave/TrustedLibrary/*.cpp)
Enclave_Include_Paths := -IInclude -IEnclave -I$(SGX_SDK)/include -I$(SGX_SDK)/include/tlibc -I$(SGX_SDK)/include/libcxx
CC_BELOW_4_9 := $(shell expr "`$(CC) -dumpversion`" \< "4.9")
ifeq ($(CC_BELOW_4_9), 1)
Enclave_C_Flags := $(SGX_COMMON_CFLAGS) -nostdinc -fvisibility=hidden -fpie -ffunction-sections -fdata-sections -fstack-protector
else
Enclave_C_Flags := $(SGX_COMMON_CFLAGS) -nostdinc -fvisibility=hidden -fpie -ffunction-sections -fdata-sections -fstack-protector-strong
endif
Enclave_C_Flags += $(Enclave_Include_Paths)
Enclave_Cpp_Flags := $(Enclave_C_Flags) -std=c++11 -nostdinc++
# To generate a proper enclave, it is recommended to follow below guideline to link the trusted libraries:
# 1. Link sgx_trts with the `--whole-archive' and `--no-whole-archive' options,
# so that the whole content of trts is included in the enclave.
# 2. For other libraries, you just need to pull the required symbols.
# Use `--start-group' and `--end-group' to link these libraries.
# Do NOT move the libraries linked with `--start-group' and `--end-group' within `--whole-archive' and `--no-whole-archive' options.
# Otherwise, you may get some undesirable errors.
Enclave_Link_Flags := $(SGX_COMMON_CFLAGS) -Wl,--no-undefined -nostdlib -nodefaultlibs -nostartfiles -L$(SGX_LIBRARY_PATH) \
-Wl,--whole-archive -l$(Trts_Library_Name) -Wl,--no-whole-archive \
-Wl,--start-group -lsgx_tstdc -lsgx_tcxx -l$(Crypto_Library_Name) -l$(Service_Library_Name) -Wl,--end-group \
-Wl,-Bstatic -Wl,-Bsymbolic -Wl,--no-undefined \
-Wl,-pie,-eenclave_entry -Wl,--export-dynamic \
-Wl,--defsym,__ImageBase=0 -Wl,--gc-sections \
-Wl,--version-script=Enclave/Enclave.lds
Enclave_Cpp_Objects := $(Enclave_Cpp_Files:.cpp=.o)
Enclave_Name := enclave.so
Signed_Enclave_Name := enclave.signed.so
Enclave_Config_File := Enclave/Enclave.config.xml
ifeq ($(SGX_MODE), HW)
ifeq ($(SGX_DEBUG), 1)
Build_Mode = HW_DEBUG
else ifeq ($(SGX_PRERELEASE), 1)
Build_Mode = HW_PRERELEASE
else
Build_Mode = HW_RELEASE
endif
else
ifeq ($(SGX_DEBUG), 1)
Build_Mode = SIM_DEBUG
else ifeq ($(SGX_PRERELEASE), 1)
Build_Mode = SIM_PRERELEASE
else
Build_Mode = SIM_RELEASE
endif
endif
.PHONY: all run
ifeq ($(Build_Mode), HW_RELEASE)
all: .config_$(Build_Mode)_$(SGX_ARCH) $(App_Name) $(Enclave_Name)
@echo "The project has been built in release hardware mode."
@echo "Please sign the $(Enclave_Name) first with your signing key before you run the $(App_Name) to launch and access the enclave."
@echo "To sign the enclave use the command:"
@echo " $(SGX_ENCLAVE_SIGNER) sign -key <your key> -enclave $(Enclave_Name) -out <$(Signed_Enclave_Name)> -config $(Enclave_Config_File)"
@echo "You can also sign the enclave using an external signing tool."
@echo "To build the project in simulation mode set SGX_MODE=SIM. To build the project in prerelease mode set SGX_PRERELEASE=1 and SGX_MODE=HW."
else
all: .config_$(Build_Mode)_$(SGX_ARCH) $(App_Name) $(Signed_Enclave_Name)
ifeq ($(Build_Mode), HW_DEBUG)
@echo "The project has been built in debug hardware mode."
else ifeq ($(Build_Mode), SIM_DEBUG)
@echo "The project has been built in debug simulation mode."
else ifeq ($(Build_Mode), HW_PRERELEASE)
@echo "The project has been built in pre-release hardware mode."
else ifeq ($(Build_Mode), SIM_PRERELEASE)
@echo "The project has been built in pre-release simulation mode."
else
@echo "The project has been built in release simulation mode."
endif
endif
run: all
ifneq ($(Build_Mode), HW_RELEASE)
@$(CURDIR)/$(App_Name)
@echo "RUN => $(App_Name) [$(SGX_MODE)|$(SGX_ARCH), OK]"
endif
######## App Objects ########
App/Enclave_u.c: $(SGX_EDGER8R) Enclave/Enclave.edl
@cd App && $(SGX_EDGER8R) --untrusted ../Enclave/Enclave.edl --search-path ../Enclave --search-path $(SGX_SDK)/include
@echo "GEN => $@"
App/Enclave_u.o: App/Enclave_u.c
@$(CC) $(App_C_Flags) -c $< -o $@
@echo "CC <= $<"
App/%.o: App/%.cpp
@$(CXX) $(App_Cpp_Flags) -c $< -o $@
@echo "CXX <= $<"
$(App_Name): App/Enclave_u.o $(App_Cpp_Objects)
@$(CXX) $^ -o $@ $(App_Link_Flags)
@echo "LINK => $@"
.config_$(Build_Mode)_$(SGX_ARCH):
@rm -f .config_* $(App_Name) $(Enclave_Name) $(Signed_Enclave_Name) $(App_Cpp_Objects) App/Enclave_u.* $(Enclave_Cpp_Objects) Enclave/Enclave_t.*
@touch .config_$(Build_Mode)_$(SGX_ARCH)
######## Enclave Objects ########
Enclave/Enclave_t.c: $(SGX_EDGER8R) Enclave/Enclave.edl
@cd Enclave && $(SGX_EDGER8R) --trusted ../Enclave/Enclave.edl --search-path ../Enclave --search-path $(SGX_SDK)/include
@echo "GEN => $@"
Enclave/Enclave_t.o: Enclave/Enclave_t.c
@$(CC) $(Enclave_C_Flags) -c $< -o $@
@echo "CC <= $<"
Enclave/%.o: Enclave/%.cpp
@$(CXX) $(Enclave_Cpp_Flags) -c $< -o $@
@echo "CXX <= $<"
$(Enclave_Name): Enclave/Enclave_t.o $(Enclave_Cpp_Objects)
@$(CXX) $^ -o $@ $(Enclave_Link_Flags)
@echo "LINK => $@"
$(Signed_Enclave_Name): $(Enclave_Name)
@$(SGX_ENCLAVE_SIGNER) sign -key Enclave/Enclave_private.pem -enclave $(Enclave_Name) -out $@ -config $(Enclave_Config_File)
@echo "SIGN => $@"
.PHONY: clean
clean:
@rm -f .config_* $(App_Name) $(Enclave_Name) $(Signed_Enclave_Name) $(App_Cpp_Objects) App/Enclave_u.* $(Enclave_Cpp_Objects) Enclave/Enclave_t.*
（以上是来自 Intel 的 Makefile 示例：https://github.com/intel/linux-sgx/blob/master/SampleCode/SampleEnclave/Makefile）
我发现这个示例项目很有帮助。另外，我根据这个例子找到了一个博客。
如果您了解英特尔 SGX 应用程序的结构并相应地实现了 Hello World 项目，则只需按照自述文件中的说明将 FindSGX.cmake 采用到您的项目中即可。
请注意，以下行是添加 FindSGX.cmake 文件的目录路径（不带文件名），而不是完整文件路径（带文件名）。
list(APPEND CMAKE_MODULE_PATH ${PATH_TO_FindSGX.cmake_FILE})
此外，您还需要安装SGX SDK并正确配置IDE CMAKE环境，具体来说您需要一个SGX_SDK=/path/to/your/sgxsdk环境变量。
如果您想使用SGX SDK的模拟模式（例如，没有SGX硬件支持），您应该在“find_package（SGX REQUIRED）”之前覆盖SGX_HW缓存条目，以便FindSGX.cmake知道没有硬件支持.
set(SGX_HW OFF CACHE BOOL "Run SGX on hardware, OFF for simulation." FORCE)
附注我可以借助 FindSGX.cmake 文件构建并运行 SGX 项目。 但是，为了准确起见，在使用 SGX SDK 中的嵌入式 c/c++ 库时，我遇到了未定义引用的链接问题。 然而，我不知道原因，所以我假设示例 CMake 项目是有效的。