gcc - 安装库时，它是 `ar`、`libtool`、`ranlib` 还是其他决定它是 32 位还是 64 位的库之一？

Question

来自重新编译 libiconv 的片段，gettext undefined symbols 在已经成功安装后发生；想把它作为自己的问题。

尝试libiconv在一个简单的.c文件中使用：

#include <iconv.h>
// works: gcc -m32 -I/usr/local/include -liconv -o test-iconv.exe test-iconv.c
// does NOT work: gcc -I/usr/local/include -liconv -o test-iconv.exe test-iconv.c
int main(int argc, char **argv) {
    iconv_t conv = iconv_open("ISO8859-1", "UTF-8");
    if (conv != (iconv_t) -1) {
    return 0;
    }
    return 1;
}

如果我没有指定-m32，gcc那么我收到以下错误：

$ gcc -I/usr/local/include -liconv -o test-iconv.exe test-iconv.c
Undefined symbols for architecture x86_64:
  "_libiconv_open", referenced from:
      _main in ccr9tTic.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

Answer 1