cc - testmain
使用内建 specs。
COLLECT_GCC=/usr/bin/cc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/mips64el-redhat-linux/4.9.4/lto-wrapper
目标：mips64el-redhat-linux
配置为：../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl= --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-arch=loongson3a --with-fix-loongson3-llsc --enable-languages=c,c++,objc,obj-c++,fortran,go,lto --enable-plugin --disable-libgcj --with-isl=/builddir/build/BUILD/gcc-4.9.4/obj-mips64el-redhat-linux/isl-install --with-cloog=/builddir/build/BUILD/gcc-4.9.4/obj-mips64el-redhat-linux/cloog-install --enable-gnu-indirect-function --with-long-double-128 --build=mips64el-redhat-linux
线程模型：posix
gcc 版本 4.9.4 20160726 (Red Hat 4.9.4-15) (GCC)