compile errors in alpine linux v3.12 about ipt2socks HOT 10 CLOSED

更新再试。

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no errors, but still some warnings:
gcc -w -O2 -c libev/ev.c -o ev.o
gcc -std=c99 -Wall -Wextra -O2 -pthread -c ipt2socks.c -o ipt2socks.o
ipt2socks.c: In function 'tcp_stream_payload_forward_cb':
ipt2socks.c:40:58: warning: implicit declaration of function 'syscall' [-Wimplicit-function-declaration]
40 | #define splice(fdin, offin, fdout, offout, len, flags) syscall(__NR_splice, fdin, offin, fdout, offout, len, flags)
| ^~~~~~~
ipt2socks.c:741:25: note: in expansion of macro 'splice'
741 | ssize_t nrecv = splice(self_watcher->fd, NULL, self_pipefd[1], NULL, TCP_SPLICE_MAXLEN, SPLICE_F_MOVE | SPLICE_F_NONBLOCK);
| ^~~~~~
gcc -std=c99 -Wall -Wextra -O2 -pthread -c logutils.c -o logutils.o
logutils.c: In function 'my_strerror':
logutils.c:10:12: warning: implicit declaration of function 'strerror_r'; did you mean 'strerror'? [-Wimplicit-function-declaration]
10 | return strerror_r(errnum, g_errstr_buffer, ERRSTR_BUFLEN);
| ^~~~~~~~~~
| strerror
logutils.c:10:12: warning: returning 'int' from a function with return type 'const char *' makes pointer from integer without a cast [-Wint-conversion]
10 | return strerror_r(errnum, g_errstr_buffer, ERRSTR_BUFLEN);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
gcc -std=c99 -Wall -Wextra -O2 -pthread -c lrucache.c -o lrucache.o
gcc -std=c99 -Wall -Wextra -O2 -pthread -c netutils.c -o netutils.o
gcc -std=c99 -Wall -Wextra -O2 -pthread -c protocol.c -o protocol.o
gcc -std=c99 -Wall -Wextra -O2 -pthread -s -o ipt2socks ipt2socks.o logutils.o lrucache.o netutils.o protocol.o ev.o -lm

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编辑 Makefile，将 c99 改为 gnu99 试下。

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edit makefile...
make clean && make all

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明天我有时间再看下这个警告如何消除（alpine真是奇怪）。。。

from ipt2socks.

把Makefile里的c99改为gnu99之后，出现同样的警告信息。

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运行时出现的错误提示：
2020-06-09 10:58:47 ERR: [tcp_stream_payload_forward_cb] recv from client stream: (null)

from ipt2socks.

..这只是网络错误。只是errmsg没有打印出来。

from ipt2socks.

更新再试，看下是否还有警告。

from ipt2socks.

警告没有了，编译正常

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