protobuf 3.5.1交叉编译

下载交叉编译链

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wget https://snapshots.linaro.org/gnu-toolchain/11.3-2022.06-1/aarch64-linux-gnu/gcc-linaro-11.3.1-2022.06-x86_64_aarch64-linux-gnu.tar.xz 
wget https://snapshots.linaro.org/gnu-toolchain/11.3-2022.06-1/aarch64-linux-gnu/sysroot-glibc-linaro-2.34-2022.06-aarch64-linux-gnu.tar.xz

下载protobuf

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wget https://github.com/protocolbuffers/protobuf/archive/refs/tags/v3.5.1.tar.gz

编译

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tar xvf v3.5.1.tar.gz
cd protobuf-3.5.1
mkdir install
./autogen.sh

配置

用选型CC/CXX指定交叉编译链
用--with-sysroot指定sysroot路径
--prefix执行安装目录的路径
--host指定目标host平台型号
--with-protoc=protoc 可以指定用protoc协助编译，前提是要安装 protobuf-compiler

./configure --target=aarch64-linux --host=aarch64-linux --with-sysroot=~/sysroot-glibc-linaro-2.34-2022.06-aarch64-linux-gnu CC=~/gcc-linaro-11.3.1-2022.06-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-gcc CXX=~/gcc-linaro-11.3.1-2022.06-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-g++ --prefix=~/protobuf-3.5.1/install

./configure --host=aarch64-linux-gnu --with-sysroot=~/sysroot-glibc-linaro-2.34-2022.06-aarch64-linux-gnu CC=~/gcc-linaro-11.3.1-2022.06-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-gcc CXX=~/gcc-linaro-11.3.1-2022.06-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-g++ --prefix=~/protobuf-3.5.1/install

实际也可以直接指定host平台即可：
./autogen.sh
./configure --with-protoc=protoc --host=aarch64-linux-gnu --prefix=~/protobuf-3.5.1/install
make
make install

编译

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make -j8

make 报错，找不到ld-linux-aarch64.so.1

将sysroot目录下的ld-linux-aarch64.so.1拷贝到系统目录/lib/ld-linux-aarch64.so.1

添加依赖库路径： ** 实测无效，需要拷贝。**

export LDFLAGS=~/sysroot-glibc-linaro-2.34-2022.06-aarch64-linux-gnu/libc/lib/
export LDFLAGS_FOR_BUILD=~/sysroot-glibc-linaro-2.34-2022.06-aarch64-linux-gnu/libc/lib/

make报错：找不到libstdc++

protobuf-3.5.1/src/.libs/lt-protoc: error while loading shared libraries: libstdc++.so.6: cannot open shared object file: No such file or directory

make[2]: *** [Makefile:9508：unittest_proto_middleman] 错误 127

后面发现可能是配置问题，修改了配置host为aarch64-linux-gnu 即可

dockers 安装编译 - success

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apt-get install autoconf automake libtool
./autogen.sh 
// ./configure --with-protoc=protoc --host=aarch64-linux-gnu  --prefix=/app/protobuf-3.5.1/install 
./configure  --host=aarch64-linux-gnu  --prefix=/app/protobuf-3.5.1/install 
make 
make install