title: How to solve "cstring: No such file or directory" when compiling gcc from source?
body: <p>I am trying to compile a gcc from source since I cannot use yum, apt-get and so forth. My steps are simple:</p>
  
  <p>-I download the source GCC (I tried gcc-4.8.4 and gcc-5.3.0) in my pc and I used:</p>
  
  <pre><code>  ./contrib/download_prerequisites
  </code></pre>
  
  <p>-After this, I send this my gcc source file to my system using powerPC y Linux.</p>
  
  <pre><code>  mkdir objdir
    cd objdir 
    ../gcc-4.6.2/configure --prefix=/usr --enable-languages=c,c++,fortran,go
    make
  </code></pre>
  
  <p>I have got the next error:</p>
  
  <pre><code>   In file included from ../../gcc-4.9.2/gcc/genmddeps.c:19:0:
     ../../gcc-4.9.2/gcc/system.h:205:20: fatal error: cstring: No such file or directory
     # include &lt;cstring&gt;
                  ^
     compilation terminated.
     make[3]: *** [build/genmddeps.o] Error 1
     make[3]: Leaving directory `/home/root/build/gcc'
     make[2]: *** [all-stage1-gcc] Error 2
     make[2]: Leaving directory `/home/root/build'
     make[1]: *** [stage1-bubble] Error 2
     make[1]: Leaving directory `/home/root/build'
     make: *** [all] Error 2
  </code></pre>
  
  <p>Any idea about what it is going wrong?</p>
  
  <p>Best regards</p>