我有一个简单的 C 程序。我正在尝试在其中使用 libarchive 。问题是链接器可能无法正常工作，所以我可以只包含 archive.h 标头而不会出错，但不能在应用程序中使用任何方法，因为我得到未定义的引用错误。这是我的代码：
#include <stdio.h>
#include <archive.h>
#include <archive_entry.h>
#include <fcntl.h>
#include <dirent.h>
#include <string.h>
int main(){
return 0;
}
write_archivec(const char *outname, const char *inner, const char **ls1, const char **ls2)
{
struct archive *a;
struct archive_entry *entry;
struct stat st;
char buff[8192];
int len;
int file;
a = archive_write_new();
archive_write_add_filter_gzip(a);
archive_write_set_format_pax_restricted(a); // Note 1
archive_write_open_filename(a, outname);
while (*ls1)
{
char tem[80];
strcpy(tem,inner);
strcat(tem,"/");
//tem = (char*)realloc(tem,strlen("symlinkpath"));
strcat(tem,*ls2);
stat(*ls1, &st);
entry = archive_entry_new(); // Note 2
archive_entry_set_pathname(entry, &tem);
archive_entry_set_size(entry, st.st_size); // Note 3
archive_entry_set_filetype(entry, AE_IFREG);
archive_entry_set_perm(entry, 0644);
archive_write_header(a, entry);
file = open(*ls1, O_RDONLY);
if(file == -1){
void Unlock();
}
len = read(file, buff, sizeof(buff));
while (len > 0)
{
archive_write_data(a, buff, len);
len = read(file, buff, sizeof(buff));
}
close(file);
archive_entry_free(entry);
ls1++;
ls2++;
}
archive_write_close(a);
archive_write_free(a);
}
输出将是：
$ gcc -I/usr/local/include -L/usr/local/lib -larchive t.c -o a
/usr/bin/ld: /tmp/cclrnMld.o: in function `write_archivec':
t.c:(.text+0x62): undefined reference to `archive_write_new'
/usr/bin/ld: t.c:(.text+0x78): undefined reference to `archive_write_add_filter_gzip'
/usr/bin/ld: t.c:(.text+0x87): undefined reference to `archive_write_set_format_pax_restricted'
/usr/bin/ld: t.c:(.text+0xa0): undefined reference to `archive_write_open_filename'
/usr/bin/ld: t.c:(.text+0x12f): undefined reference to `archive_entry_new'
/usr/bin/ld: t.c:(.text+0x14f): undefined reference to `archive_entry_set_pathname'
/usr/bin/ld: t.c:(.text+0x168): undefined reference to `archive_entry_set_size'
/usr/bin/ld: t.c:(.text+0x17c): undefined reference to `archive_entry_set_filetype'
/usr/bin/ld: t.c:(.text+0x190): undefined reference to `archive_entry_set_perm'
/usr/bin/ld: t.c:(.text+0x1a9): undefined reference to `archive_write_header'
/usr/bin/ld: t.c:(.text+0x211): undefined reference to `archive_write_data'
/usr/bin/ld: t.c:(.text+0x258): undefined reference to `archive_entry_free'
/usr/bin/ld: t.c:(.text+0x28a): undefined reference to `archive_write_close'
/usr/bin/ld: t.c:(.text+0x299): undefined reference to `archive_write_free'
collect2: error: ld returned 1 exit status.
我也按照这里的安装说明