1

我想运行位于桌面的 C 代码,而头文件位于其他位置。编译和执行的适当 GCC 命令应该是什么?我附上了下面的代码。我在这方面要求善意的考虑和帮助。

#include <config.h>
#endif

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>

#include </usr/include/pulse/simple.h>
#include </usr/include/pulse/error.h>

#define BUFSIZE 32

int main(int argc, char*argv[]) {

    /* The Sample format to use */
static const pa_sample_spec ss = {
    .format = PA_SAMPLE_S16LE,
    .rate = 44100,
    .channels = 2
};

pa_simple *s_in, *s_out = NULL;
int ret = 1;
int error;


/* Create a new playback stream */
if (!(s_out = pa_simple_new(NULL, argv[0], PA_STREAM_PLAYBACK, NULL, "playback", &ss, NULL, NULL, &error))) {
    fprintf(stderr, __FILE__": pa_simple_new() failed: %s\n", pa_strerror(error));
    goto finish;
}

  if (!(s_in = pa_simple_new(NULL, argv[0], PA_STREAM_RECORD, NULL, "record", &ss, NULL, NULL, &error))) {
    fprintf(stderr, __FILE__": pa_simple_new() failed: %s\n", pa_strerror(error));
    goto finish;
}

for (;;) {
    uint8_t buf[BUFSIZE];
    ssize_t r;

   #if 1
    pa_usec_t latency;

    if ((latency = pa_simple_get_latency(s_in, &error)) == (pa_usec_t) -1) {
        fprintf(stderr, __FILE__": pa_simple_get_latency() failed: %s\n", pa_strerror(error));
        goto finish;
    }

    fprintf(stderr, "In:  %0.0f usec    \r\n", (float)latency);

        if ((latency = pa_simple_get_latency(s_out, &error)) == (pa_usec_t) -1) {
        fprintf(stderr, __FILE__": pa_simple_get_latency() failed: %s\n",    pa_strerror(error));
            goto finish;
      }

        fprintf(stderr, "Out: %0.0f usec    \r\n", (float)latency);
#endif

        if (pa_simple_read(s_in, buf, sizeof(buf), &error) < 0) {

        fprintf(stderr, __FILE__": read() failed: %s\n", strerror(errno));
        goto finish;
    }

    /* ... and play it */
    if (pa_simple_write(s_out, buf, sizeof(buf), &error) < 0) {
        fprintf(stderr, __FILE__": pa_simple_write() failed: %s\n", pa_strerror(error));
        goto finish;
    }
}

/* Make sure that every single sample was played */
if (pa_simple_drain(s_out, &error) < 0) {
    fprintf(stderr, __FILE__": pa_simple_drain() failed: %s\n", pa_strerror(error));
    goto finish;
}

ret = 0;

finish:

if (s_in)
    pa_simple_free(s_in);
if (s_out)
    pa_simple_free(s_out);

return ret;
}
4

3 回答 3

1

看起来你只需要替换这个:

#include </usr/include/pulse/simple.h>
#include </usr/include/pulse/error.h>

有了这个:

#include "simple.h"
#include "error.h"

你的命令行必须是这样的:

gcc -I"/usr/include/pulse" program.c -lpulse

您需要将“program.c”替换为源文件的名称。

或者甚至只是将这两行替换为接下来的两行:

#include <pulse/simple.h>
#include <pulse/error.h>

(目录 /usr/include 似乎是标准的包含路径),在这种情况下,您的命令行将是:

gcc program.c -lpulse 
于 2013-01-18T07:19:58.387 回答
1

C 编译器通过以下方式包含头文件(通过#include):

  1. #include "somename.h":它开始在 somefile.h 的源目录中搜索,如果在那里找不到它,它开始看起来像 (2)
  2. #include <somename.h>:它搜索一系列(系统相关的)目录。在类 Unix 系统(Linux、MacOS)中,这基本上是/usr/include,但可能会添加其他目录。

在大多数编译器中,您可以通过在序列开头-I/some/path flags添加来控制这一点 (2)。/some/path另请注意,somename.h上面可以包括/,所以如果你写

#include "this/file.h"

然后它在当前目录file.h的目录中查找。this

于 2013-01-20T04:48:14.927 回答
0

试试看http://www.network-theory.co.uk/docs/gccintro/gccintro_22.htmlgcc -c -I/path/to/source/files fileName.c _

于 2013-01-18T05:20:12.293 回答