c - 用一个头文件链接多个c文件

Question

我刚开始将 c 文件链接在一起，想知道是否有人可以帮助我将 2 个 c 文件与头文件链接起来。在我的 make 文件中，我有:

all: runMe

runMe: a2.o functions.o

    gcc a2.o functions.o -o runMe

a2.o: a2.c structs.h
    gcc -Wall -pedantic -std=c99 -c a2.c

functions.o: functions.c structs.h
    gcc -Wall -pedantic -std=c99 -c functions.c

其中 structs.h 包含我使用的结构以及 function.c 中使用的函数原型(prototype)。我是否将 #include "structs.h"放入两个 c 文件中，还是只放入其中之一？如果它不在两者中，我会得到未声明的标识、未知类型等。如果我将它包含在两者中，我会得到如下错误:

Undefined symbols for architecture x86_64:
  "_acs_map", referenced from:
  _main in a2.o
  _forward in functions.o
  _backwards in functions.o
"_endwin", referenced from:
  _main in a2.o
"_init_pair", referenced from:
  _forward in functions.o
  _backwards in functions.o
"_initscr", referenced from:
  _main in a2.o
"_printw", referenced from:
  _main in a2.o
"_start_color", referenced from:
  _main in a2.o
"_stdscr", referenced from:
  _main in a2.o
  _forward in functions.o
  _backwards in functions.o
  _restartScreen in functions.o
  _cleanScreen in functions.o
"_waddch", referenced from:
  _main in a2.o
  _forward in functions.o
  _backwards in functions.o
"_wattr_off", referenced from:
  _forward in functions.o
  _backwards in functions.o
"_wattr_on", referenced from:
  _forward in functions.o
  _backwards in functions.o
"_wclear", referenced from:
  _restartScreen in functions.o
  _cleanScreen in functions.o
"_wgetch", referenced from:
  _main in a2.o
"_wgetnstr", referenced from:
  _main in a2.o
"_wmove", referenced from:
  _main in a2.o
  _forward in functions.o
  _backwards in functions.o
"_wrefresh", referenced from:
  _main in a2.o

Answer 1

您的 header 很好，您可以将其包含在两个 C 文件中。

错误来自链接器。它无法找到您在代码中使用的 ncurses 库函数(initscr、startcolor 等)。

您需要首先查找系统中是否安装了 ncurses 库，如果安装了，请指定 libncurses 库的可用路径，如下所示。

runMe: a2.o functions.o
    gcc -LPATH_TO_NCURSES_LIB a2.o functions.o -lncurses -o runMe

您使用什么操作系统？ Windows、Linux、BSD？