编译 MPFR

1. 从 mpfr.org 下载源码：

   wget https://www.mpfr.org/mpfr-current/mpfr-4.2.2.tar.xz
   tar -Jxf mpfr-*.tar.xz
   

2. 编译并安装：

   ./configure
   make -j$(nproc)
   sudo make install
   

3. 将下面的命令加入 ~/.bashrc：

   export CPPFLAGS="-I/usr/local/include $CPPFLAGS"
   export LDFLAGS="-L/usr/local/lib $LDFLAGS"
   export LD_LIBRARY_PATH="/usr/local/lib:$LD_LIBRARY_PATH"
   

4. 检查当前 MPFR 版本：

   version.c:

   #include <stdio.h>
   #include <mpfr.h>
   int main (void)
   {
     printf ("MPFR library: %-12s\nMPFR header:  %s (based on %d.%d.%d)\n",
             mpfr_get_version (), MPFR_VERSION_STRING, MPFR_VERSION_MAJOR,
             MPFR_VERSION_MINOR, MPFR_VERSION_PATCHLEVEL);
     return 0;
   }
   

   cc -o version version.c -lmpfr -lgmp
   

参考：How to Install | GNU MPFR