c - C 中未声明的标识符

Question

我一直在尝试编译一个使用 PCL 的程序。但是，我不断收到此错误:

test.c:23: error: ‘PCL_CNT_TYPE’ undeclared (first use in this function)
test.c:23: error: (Each undeclared identifier is reported only once
test.c:23: error: for each function it appears in.)
test.c:23: error: expected ‘;’ before ‘i_result_list1’
test.c:24: error: ‘PCL_FP_CNT_TYPE’ undeclared (first use in this function)
test.c:24: error: expected ‘;’ before ‘fp_result_list1’
test.c:27: error: ‘PCL_L1DCACHE_MISS’ undeclared (first use in this function)
test.c:28: error: ‘PCL_L2CACHE_MISS’ undeclared (first use in this function)
test.c:30: error: ‘PCL_MODE_USER’ undeclared (first use in this function)
test.c:33: error: ‘PCL_SUCCESS’ undeclared (first use in this function)
test.c:47: error: ‘i_result_list2’ undeclared (first use in this function)
test.c:47: error: ‘fp_result_list2’ undeclared (first use in this function)

有什么想法吗？

我的机器上安装了 libpcl1{-dev}，所以我想知道还需要什么才能让它工作。

如果您需要更多信息，请告诉我。

谢谢。

Answer 1

放:

#include <pcl.h>

在文件的顶部。链接时您还需要 -lpcl。例如:

gcc program.c -lpcl -o program