Created attachment 319075 [details]
[PATCH] Fix building on musl-libc

libgtop fails to build on musl libc, due to the header #ifdefs on sysdeps/linux/netload.c being a bit too inclusive, resulting in the headers that would be loaded for libc 5 being loaded on musl libc.

Without this patch:

make  all-recursive
make[1]: Entering directory '/home/somasis/git/libgtop'
Making all in po
make[2]: Entering directory '/home/somasis/git/libgtop/po'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/home/somasis/git/libgtop/po'
Making all in misc
make[2]: Entering directory '/home/somasis/git/libgtop/misc'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/home/somasis/git/libgtop/misc'
Making all in include
make[2]: Entering directory '/home/somasis/git/libgtop/include'
Making all in glibtop
make[3]: Entering directory '/home/somasis/git/libgtop/include/glibtop'
make[3]: Nothing to be done for 'all'.
make[3]: Leaving directory '/home/somasis/git/libgtop/include/glibtop'
make[3]: Entering directory '/home/somasis/git/libgtop/include'
make[3]: Nothing to be done for 'all-am'.
make[3]: Leaving directory '/home/somasis/git/libgtop/include'
make[2]: Leaving directory '/home/somasis/git/libgtop/include'
Making all in sysdeps
make[2]: Entering directory '/home/somasis/git/libgtop/sysdeps'
Making all in common
make[3]: Entering directory '/home/somasis/git/libgtop/sysdeps/common'
make[3]: Nothing to be done for 'all'.
make[3]: Leaving directory '/home/somasis/git/libgtop/sysdeps/common'
Making all in linux
make[3]: Entering directory '/home/somasis/git/libgtop/sysdeps/linux'
  CC       netload.lo
In file included from /usr/x86_64-pc-linux-musl/include/ifaddrs.h:9:0,
                 from netload.c:59:
/usr/x86_64-pc-linux-musl/include/netinet/in.h:14:8: error: redefinition of 'struct in_addr'
 struct in_addr { in_addr_t s_addr; };
        ^
In file included from netload.c:48:0:
/usr/x86_64-pc-linux-musl/include/linux/in.h:84:8: note: originally defined here
 struct in_addr {
        ^
In file included from /usr/x86_64-pc-linux-musl/include/ifaddrs.h:9:0,
                 from netload.c:59:
/usr/x86_64-pc-linux-musl/include/netinet/in.h:16:8: error: redefinition of 'struct sockaddr_in'
 struct sockaddr_in
        ^
In file included from netload.c:48:0:
/usr/x86_64-pc-linux-musl/include/linux/in.h:230:8: note: originally defined here
 struct sockaddr_in {
        ^
In file included from /usr/x86_64-pc-linux-musl/include/ifaddrs.h:9:0,
                 from netload.c:59:
/usr/x86_64-pc-linux-musl/include/netinet/in.h:248:8: error: redefinition of 'struct ip_mreq'
 struct ip_mreq
        ^
In file included from netload.c:48:0:
/usr/x86_64-pc-linux-musl/include/linux/in.h:166:8: note: originally defined here
 struct ip_mreq  {
        ^
In file included from /usr/x86_64-pc-linux-musl/include/ifaddrs.h:9:0,
                 from netload.c:59:
/usr/x86_64-pc-linux-musl/include/netinet/in.h:254:8: error: redefinition of 'struct ip_mreqn'
 struct ip_mreqn
        ^
In file included from netload.c:48:0:
/usr/x86_64-pc-linux-musl/include/linux/in.h:171:8: note: originally defined here
 struct ip_mreqn {
        ^
In file included from /usr/x86_64-pc-linux-musl/include/ifaddrs.h:9:0,
                 from netload.c:59:
/usr/x86_64-pc-linux-musl/include/netinet/in.h:261:8: error: redefinition of 'struct ip_mreq_source'
 struct ip_mreq_source {
        ^
In file included from netload.c:48:0:
/usr/x86_64-pc-linux-musl/include/linux/in.h:177:8: note: originally defined here
 struct ip_mreq_source {
        ^
In file included from /usr/x86_64-pc-linux-musl/include/ifaddrs.h:9:0,
                 from netload.c:59:
/usr/x86_64-pc-linux-musl/include/netinet/in.h:267:8: error: redefinition of 'struct ip_msfilter'
 struct ip_msfilter {
        ^
In file included from netload.c:48:0:
/usr/x86_64-pc-linux-musl/include/linux/in.h:183:8: note: originally defined here
 struct ip_msfilter {
        ^
In file included from /usr/x86_64-pc-linux-musl/include/ifaddrs.h:9:0,
                 from netload.c:59:
/usr/x86_64-pc-linux-musl/include/netinet/in.h:278:8: error: redefinition of 'struct group_req'
 struct group_req {
        ^
In file included from netload.c:48:0:
/usr/x86_64-pc-linux-musl/include/linux/in.h:195:8: note: originally defined here
 struct group_req {
        ^
In file included from /usr/x86_64-pc-linux-musl/include/ifaddrs.h:9:0,
                 from netload.c:59:
/usr/x86_64-pc-linux-musl/include/netinet/in.h:283:8: error: redefinition of 'struct group_source_req'
 struct group_source_req {
        ^
In file included from netload.c:48:0:
/usr/x86_64-pc-linux-musl/include/linux/in.h:200:8: note: originally defined here
 struct group_source_req {
        ^
In file included from /usr/x86_64-pc-linux-musl/include/ifaddrs.h:9:0,
                 from netload.c:59:
/usr/x86_64-pc-linux-musl/include/netinet/in.h:289:8: error: redefinition of 'struct group_filter'
 struct group_filter {
        ^
In file included from netload.c:48:0:
/usr/x86_64-pc-linux-musl/include/linux/in.h:206:8: note: originally defined here
 struct group_filter {
        ^
In file included from /usr/x86_64-pc-linux-musl/include/ifaddrs.h:9:0,
                 from netload.c:59:
/usr/x86_64-pc-linux-musl/include/netinet/in.h:300:8: error: redefinition of 'struct in_pktinfo'
 struct in_pktinfo
        ^
In file included from netload.c:48:0:
/usr/x86_64-pc-linux-musl/include/linux/in.h:220:8: note: originally defined here
 struct in_pktinfo {
        ^
netload.c: In function 'get_ipv6':
netload.c:164:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
    || IN6_IS_ADDR_V4COMPAT (buf->address6)
    ^
netload.c:166:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
    || IN6_IS_ADDR_UNSPECIFIED (buf->address6)
    ^
netload.c:170:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  else if (IN6_IS_ADDR_LOOPBACK (buf->address6))
  ^
Makefile:529: recipe for target 'netload.lo' failed
make[3]: *** [netload.lo] Error 1
make[3]: Leaving directory '/home/somasis/git/libgtop/sysdeps/linux'
Makefile:434: recipe for target 'all-recursive' failed
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory '/home/somasis/git/libgtop/sysdeps'
Makefile:583: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/home/somasis/git/libgtop'
Makefile:467: recipe for target 'all' failed
make: *** [all] Error 2