build using musl libc

[ScrumpyJack]

iperf3 version 3.1.1

building using musl libc fails (this is on Alpine Linux, so it's a follow up of #328)

iperf.h:71:21: error: field 'tcpInfo' has incomplete type
struct tcp_info tcpInfo; /* getsockopt(TCP_INFO) for Linux, {Free,Net}BSD */

This was fixed (probably incorrectly) with

-struct tcp_info tcpInfo; /* getsockopt(TCP_INFO) for Linux, {Free,Net}BSD /
+struct tcp_info *tcpInfo; / getsockopt(TCP_INFO) for Linux, {Free,Net}BSD */

but then more errors occured

libtool: compile:  gcc -DHAVE_CONFIG_H -I. -Os -fomit-frame-pointer -Os -fomit-frame-pointer -Wall -MT tcp_info.lo -MD -MP -MF .deps/tcp_info.Tpo -c tcp_info.c  -fPIC -DPIC -o .libs/tcp_info.o
tcp_info.c: In function 'save_tcpinfo':
tcp_info.c:100:40: error: invalid application of 'sizeof' to incomplete type 'struct tcp_info'
     socklen_t tcp_info_length = sizeof(struct tcp_info);
                                        ^
tcp_info.c:107:21: error: request for member 'tcpi_snd_cwnd' in something not a structure or union
         irp->tcpInfo.tcpi_snd_cwnd, irp->tcpInfo.tcpi_snd_mss,
                     ^
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -Os -fomit-frame-pointer -Os -fomit-frame-pointer -Wall -MT tcp_window_size.lo -MD -MP -MF .deps/tcp_window_size.Tpo -c tcp_window_size.c  -fPIC -DPIC -o .libs/tcp_window_size.o
tcp_info.c:107:49: error: request for member 'tcpi_snd_mss' in something not a structure or union
         irp->tcpInfo.tcpi_snd_cwnd, irp->tcpInfo.tcpi_snd_mss,
                                                 ^
tcp_info.c:108:21: error: request for member 'tcpi_rtt' in something not a structure or union
         irp->tcpInfo.tcpi_rtt);
                     ^
tcp_info.c: In function 'get_total_retransmits':
tcp_info.c:119:24: error: request for member 'tcpi_total_retrans' in something not a structure or union
     return irp->tcpInfo.tcpi_total_retrans;
                        ^
tcp_info.c: In function 'get_snd_cwnd':
tcp_info.c:137:24: error: request for member 'tcpi_snd_cwnd' in something not a structure or union
     return irp->tcpInfo.tcpi_snd_cwnd * irp->tcpInfo.tcpi_snd_mss;
                        ^
tcp_info.c:137:53: error: request for member 'tcpi_snd_mss' in something not a structure or union
     return irp->tcpInfo.tcpi_snd_cwnd * irp->tcpInfo.tcpi_snd_mss;
                                                     ^
tcp_info.c: In function 'get_rtt':
tcp_info.c:155:24: error: request for member 'tcpi_rtt' in something not a structure or union
     return irp->tcpInfo.tcpi_rtt;
                        ^
tcp_info.c: In function 'build_tcpinfo_message':
tcp_info.c:170:48: error: request for member 'tcpi_snd_cwnd' in something not a structure or union
     sprintf(message, report_tcpInfo, r->tcpInfo.tcpi_snd_cwnd, r->tcpInfo.tcpi_snd_ssthresh,
                                                ^
tcp_info.c:170:74: error: request for member 'tcpi_snd_ssthresh' in something not a structure or union
     sprintf(message, report_tcpInfo, r->tcpInfo.tcpi_snd_cwnd, r->tcpInfo.tcpi_snd_ssthresh,
                                                                          ^
tcp_info.c:171:16: error: request for member 'tcpi_rcv_ssthresh' in something not a structure or union
      r->tcpInfo.tcpi_rcv_ssthresh, r->tcpInfo.tcpi_unacked, r->tcpInfo.tcpi_sacked,
                ^
tcp_info.c:171:46: error: request for member 'tcpi_unacked' in something not a structure or union
      r->tcpInfo.tcpi_rcv_ssthresh, r->tcpInfo.tcpi_unacked, r->tcpInfo.tcpi_sacked,
                                              ^
tcp_info.c:171:71: error: request for member 'tcpi_sacked' in something not a structure or union
      r->tcpInfo.tcpi_rcv_ssthresh, r->tcpInfo.tcpi_unacked, r->tcpInfo.tcpi_sacked,
                                                                       ^
tcp_info.c:172:16: error: request for member 'tcpi_lost' in something not a structure or union
      r->tcpInfo.tcpi_lost, r->tcpInfo.tcpi_retrans, r->tcpInfo.tcpi_fackets, 
                ^
tcp_info.c:172:38: error: request for member 'tcpi_retrans' in something not a structure or union
      r->tcpInfo.tcpi_lost, r->tcpInfo.tcpi_retrans, r->tcpInfo.tcpi_fackets, 
                                      ^
tcp_info.c:172:63: error: request for member 'tcpi_fackets' in something not a structure or union
      r->tcpInfo.tcpi_lost, r->tcpInfo.tcpi_retrans, r->tcpInfo.tcpi_fackets, 
                                                               ^
tcp_info.c:173:16: error: request for member 'tcpi_rtt' in something not a structure or union
      r->tcpInfo.tcpi_rtt, r->tcpInfo.tcpi_reordering);
                ^
tcp_info.c:173:37: error: request for member 'tcpi_reordering' in something not a structure or union
      r->tcpInfo.tcpi_rtt, r->tcpInfo.tcpi_reordering);
                                     ^
tcp_info.c: In function 'get_total_retransmits':
tcp_info.c:127:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
tcp_info.c: In function 'get_snd_cwnd':
tcp_info.c:145:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
tcp_info.c: In function 'get_rtt':
tcp_info.c:163:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
Makefile:856: recipe for target 'tcp_info.lo' failed

I can provide an alpine linux (musl libc) build environment for you if you think it might help

[bkuhls]

Using these patches I could compile iperf-3.1.1 with a musl toolchain on buildroot:
http://patchwork.ozlabs.org/patch/572187/

[pjebs]

How can I get iperf3.1 on alpine?
Is there a image somewhere on docker repository?

@bkuhls Was it difficult to build in alpine? If you are using docker, would you mind sharing the Dockerfile?

[little-dude]

@pjebs:

Is there a image somewhere on docker repository?

there is a docker image, yes: https://hub.docker.com/_/alpine/

How can I get iperf3.1 on alpine?

since it currently does not build there is not package available unfortunately

[bmah888]

Reopening this issue so that I remember to merge the fix (in #518) to the 3.1-STABLE branch.