Mips平台kaldi源码的交叉编译一openFst的交叉编译

前言：

openfst的介绍就不必了，大家自行百度，下面进入正题。

Openfst下载：

目前kaldi版本为5.5，使用的openfst的版本为openfst-1.6.7.tar.gz，进入openfst官网，找到对应的tar.gz下载，如下图

Openfst的交叉编译：

1. 拷贝openfst-1.6.7.tar.gz至kaldi源码路径下的tools/

2. 执行解压命令 tar -zxvf openfst-1.6.7.tar.gz

3. cd openfst-1.6.7/

4. 执行命令 CXX=mips-linux-gnu-g++ CXXFLAGS=-mxgot ./configure --prefix=`pwd` --enable-static --enable-shared --enable-ngram-fsts --host=mips-linux-gnu LIBS="-ldl"

5. make

~~6. 修改/src/script/Makefile，在CXXFLAGS变量中添加 -G0~~ ，（注：在写此博客时，第5步编译完成后，已经能够顺利编译成功，则跳过该步。之前这样修改可能是由于交叉工具链的版本不同，具体编译错误的日志没有保存，如果第5步编译失败，可以再尝试这一步后重新编译）

7. make install

8. 创建软链接： ln -s openfst-1.6.7 openfst

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关于以上命令解释：

--prefix 执行make install时lib库的安装位置为当前位置
--enable-static 生成静态库（实际在开发板中，使用的是静态库，当然也可以用动态库）
--enable-shared 生成动态库
--enable-ngram-fsts ngram是语言模型相关的，可以查阅ngram相关的资料
CXXFLAGS=-mxgot 由于编译错误，具体见下面的报错

编译错误一：

报错log： relocation truncated to fit: R_MIPS_CALL16 against `std::allocator<char>::allocator()@@GLIBCXX_3.4', 详细log如下：

.libs/determinize.o: In function `fst::script::Determinize(fst::script::FstClass const&, fst::script::MutableFstClass*, fst::script::DeterminizeOptions const&)':
determinize.cc:(.text+0x43c): relocation truncated to fit: R_MIPS_CALL16 against `std::allocator<char>::allocator()@@GLIBCXX_3.4'
determinize.cc:(.text+0x46c): relocation truncated to fit: R_MIPS_CALL16 against `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)@@GLIBCXX_3.4.21'
determinize.cc:(.text+0x4d0): relocation truncated to fit: R_MIPS_CALL16 against `std::allocator<char>::allocator()@@GLIBCXX_3.4'
determinize.cc:(.text+0x500): relocation truncated to fit: R_MIPS_CALL16 against `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)@@GLIBCXX_3.4.21'
determinize.cc:(.text+0x56c): relocation truncated to fit: R_MIPS_CALL16 against `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()@@GLIBCXX_3.4.21'
determinize.cc:(.text+0x5b4): relocation truncated to fit: R_MIPS_CALL16 against `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()@@GLIBCXX_3.4.21'
determinize.cc:(.text+0x614): relocation truncated to fit: R_MIPS_CALL16 against `fst::script::MutableFstClass::SetProperties(unsigned long long, unsigned long long)'
determinize.cc:(.text+0x664): relocation truncated to fit: R_MIPS_CALL16 against `std::allocator<char>::allocator()@@GLIBCXX_3.4'
determinize.cc:(.text+0x690): relocation truncated to fit: R_MIPS_CALL16 against `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)@@GLIBCXX_3.4.21'
determinize.cc:(.text+0x6f0): relocation truncated to fit: R_MIPS_CALL16 against `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()@@GLIBCXX_3.4.21'
.libs/determinize.o: In function `__static_initialization_and_destruction_0(int, int)':
determinize.cc:(.text+0x7c0): additional relocation overflows omitted from the output
collect2: error: ld returned 1 exit status
Makefile:445: recipe for target 'libfstscript.la' failed
make[3]: *** [libfstscript.la] Error 1

解决方法：第4步中在变量CXXFLAGS中添加 -mxgot ，即 CXXFLAGS=-mxgot

如果有编译问题，欢迎留言，一起研究解决方法。