c - 我应该如何用 cc 编译这个旧代码

Question

我正在尝试在 Ubuntu 18.04.2 LTS 中编译 2001 年的源代码。但是，我收到以下错误，实际上不知道如何更改编译代码。你能帮我编译这段代码吗？

程序中建议的编译部分

  SUGGESTED COMPILATION COMMAND LINE (FOR A DEC-ALPHA CC-COMPILER):

  cc -lm -fast -tune host -arch host -assume whole_program \
     -o mol_volume mol_volume.c

当我尝试这段代码时，出现错误；

cc: error: host: No such file or directory
cc: error: host: No such file or directory
cc: error: whole_program: No such file or directory
cc: error: unrecognized command line option ‘-fast’; did you mean ‘-Ofast’?
cc: error: unrecognized command line option ‘-tune’; did you mean ‘-mtune=’?
cc: error: unrecognized command line option ‘-arch’; did you mean ‘-march=’?
cc: error: unrecognized command line option ‘-assume’; did you mean ‘-msse’?

然后，我改变了-fast , -tune , -arch , -assume带有 -Ofast 的标志, -mtune=native , -march=native , -msse然后添加错误目录部分的路径。

cc -lm -Ofast -mtune=native -march=native -msse /mypath/ -o mol_volume mol_volume.c

然后，我得到了这个错误；

mol_volume.c: In function ‘main’:
mol_volume.c:235:10: warning: implicit declaration of function ‘gets’; did you mean ‘fgets’? [-Wimplicit-function-declaration]
   while( gets(s) ) {
          ^~~~
          fgets
mol_volume.c:311:26: warning: format ‘%i’ expects argument of type ‘int’, but argument 2 has type ‘long int’ [-Wformat=]
    printf("WARNING: the %i-th atom of the pdb file %s has an unknown chemical type %s.\n",
                         ~^
                         %li
      i+1, pdb_name, atom_type);
      ~~~                  
/usr/bin/ld: cannot find .: File format not recognized
collect2: error: ld returned 1 exit status

您可以通过此链接访问源代码； Source Code

我的电脑信息:

操作系统:Ubuntu 18.04.2 LTS

内核版本:4.15.0-50-generic

GCC 版本:7.4.0

Answer 1

gets 在 C11 中被删除。使用gcc -o mol_volume -Wall -std=c99 -mtune=native -O3 mol_volume.c -lm进行编译。

它会起作用，但您应该修复代码以删除所有警告。