Cannot install uwsgi on Alpine

Question

I'm trying to install uwsgi using pip install uwsgi in my Alpine docker image but unfortunately it keeps failing weird no real error message to me:

Complete output from command /usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip-build-mEZegv/uwsgi/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-c7XA_e-record/install-record.txt --single-version-externally-managed --compile:
    running install
    using profile: buildconf/default.ini
    detected include path: ['/usr/include/fortify', '/usr/include', '/usr/lib/gcc/x86_64-alpine-linux-musl/5.3.0/include']
    Patching "bin_name" to properly install_scripts dir
    detected CPU cores: 1
    configured CFLAGS: -O2 -I. -Wall -Werror -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -fno-strict-aliasing -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -DUWSGI_HAS_IFADDRS -DUWSGI_ZLIB -DUWSGI_LOCK_USE_MUTEX -DUWSGI_EVENT_USE_EPOLL -DUWSGI_EVENT_TIMER_USE_TIMERFD -DUWSGI_EVENT_FILEMONITOR_USE_INOTIFY -DUWSGI_VERSION="\"2.0.12\"" -DUWSGI_VERSION_BASE="2" -DUWSGI_VERSION_MAJOR="0" -DUWSGI_VERSION_MINOR="12" -DUWSGI_VERSION_REVISION="0" -DUWSGI_VERSION_CUSTOM="\"\"" -DUWSGI_YAML -DUWSGI_PLUGIN_DIR="\".\"" -DUWSGI_DECLARE_EMBEDDED_PLUGINS="UDEP(python);UDEP(gevent);UDEP(ping);UDEP(cache);UDEP(nagios);UDEP(rrdtool);UDEP(carbon);UDEP(rpc);UDEP(corerouter);UDEP(fastrouter);UDEP(http);UDEP(ugreen);UDEP(signal);UDEP(syslog);UDEP(rsyslog);UDEP(logsocket);UDEP(router_uwsgi);UDEP(router_redirect);UDEP(router_basicauth);UDEP(zergpool);UDEP(redislog);UDEP(mongodblog);UDEP(router_rewrite);UDEP(router_http);UDEP(logfile);UDEP(router_cache);UDEP(rawrouter);UDEP(router_static);UDEP(sslrouter);UDEP(spooler);UDEP(cheaper_busyness);UDEP(symcall);UDEP(transformation_tofile);UDEP(transformation_gzip);UDEP(transformation_chunked);UDEP(transformation_offload);UDEP(router_memcached);UDEP(router_redis);UDEP(router_hash);UDEP(router_expires);UDEP(router_metrics);UDEP(transformation_template);UDEP(stats_pusher_socket);" -DUWSGI_LOAD_EMBEDDED_PLUGINS="ULEP(python);ULEP(gevent);ULEP(ping);ULEP(cache);ULEP(nagios);ULEP(rrdtool);ULEP(carbon);ULEP(rpc);ULEP(corerouter);ULEP(fastrouter);ULEP(http);ULEP(ugreen);ULEP(signal);ULEP(syslog);ULEP(rsyslog);ULEP(logsocket);ULEP(router_uwsgi);ULEP(router_redirect);ULEP(router_basicauth);ULEP(zergpool);ULEP(redislog);ULEP(mongodblog);ULEP(router_rewrite);ULEP(router_http);ULEP(logfile);ULEP(router_cache);ULEP(rawrouter);ULEP(router_static);ULEP(sslrouter);ULEP(spooler);ULEP(cheaper_busyness);ULEP(symcall);ULEP(transformation_tofile);ULEP(transformation_gzip);ULEP(transformation_chunked);ULEP(transformation_offload);ULEP(router_memcached);ULEP(router_redis);ULEP(router_hash);ULEP(router_expires);ULEP(router_metrics);ULEP(transformation_template);ULEP(stats_pusher_socket);"core/utils.c: In function 'uwsgi_as_root':
    core/utils.c:344:7: error: implicit declaration of function 'unshare' [-Werror=implicit-function-declaration]
       if (unshare(uwsgi.unshare)) {
           ^
    core/utils.c:564:5: error: implicit declaration of function 'sigfillset' [-Werror=implicit-function-declaration]
         sigfillset(&smask);
         ^
    core/utils.c:565:5: error: implicit declaration of function 'sigprocmask' [-Werror=implicit-function-declaration]
         sigprocmask(SIG_BLOCK, &smask, NULL);
         ^
    core/utils.c:565:17: error: 'SIG_BLOCK' undeclared (first use in this function)
         sigprocmask(SIG_BLOCK, &smask, NULL);
                     ^
    core/utils.c:565:17: note: each undeclared identifier is reported only once for each function it appears in
    core/utils.c:586:7: error: implicit declaration of function 'chroot' [-Werror=implicit-function-declaration]
       if (chroot(uwsgi.chroot)) {
           ^
    core/utils.c:791:5: error: unknown type name 'ushort'
         ushort *array;
         ^
    core/utils.c:833:8: error: implicit declaration of function 'setgroups' [-Werror=implicit-function-declaration]
        if (setgroups(0, NULL)) {
            ^
    core/utils.c:848:8: error: implicit declaration of function 'initgroups' [-Werror=implicit-function-declaration]
        if (initgroups(uidname, uwsgi.gid)) {
            ^
    core/utils.c: In function 'uwsgi_close_request':
    core/utils.c:1145:18: error: 'WAIT_ANY' undeclared (first use in this function)
       while (waitpid(WAIT_ANY, &waitpid_status, WNOHANG) > 0);
                      ^
    core/utils.c: In function 'uwsgi_resolve_ip':
    core/utils.c:1802:7: error: implicit declaration of function 'gethostbyname' [-Werror=implicit-function-declaration]
      he = gethostbyname(domain);
           ^
    core/utils.c:1802:5: error: assignment makes pointer from integer without a cast [-Werror=int-conversion]
      he = gethostbyname(domain);
         ^
    core/utils.c: In function 'uwsgi_unix_signal':
    core/utils.c:1936:19: error: storage size of 'sa' isn't known
      struct sigaction sa;
                       ^
    core/utils.c:1938:24: error: invalid application of 'sizeof' to incomplete type 'struct sigaction'
      memset(&sa, 0, sizeof(struct sigaction));
                            ^
    core/utils.c:1942:2: error: implicit declaration of function 'sigemptyset' [-Werror=implicit-function-declaration]
      sigemptyset(&sa.sa_mask);
      ^
    core/utils.c:1944:6: error: implicit declaration of function 'sigaction' [-Werror=implicit-function-declaration]
      if (sigaction(signum, &sa, NULL) < 0) {
          ^
    core/utils.c:1936:19: error: unused variable 'sa' [-Werror=unused-variable]
      struct sigaction sa;
                       ^
    In file included from core/utils.c:1:0:
    core/utils.c: In function 'uwsgi_list_has_num':
    ./uwsgi.h:140:47: error: implicit declaration of function 'strtok_r' [-Werror=implicit-function-declaration]
     #define uwsgi_foreach_token(x, y, z, w) for(z=strtok_r(x, y, &w);z;z = strtok_r(NULL, y, &w))
                                                   ^
    core/utils.c:1953:2: note: in expansion of macro 'uwsgi_foreach_token'
      uwsgi_foreach_token(list2, ",", p, ctx) {
      ^
    ./uwsgi.h:140:46: error: assignment makes pointer from integer without a cast [-Werror=int-conversion]
     #define uwsgi_foreach_token(x, y, z, w) for(z=strtok_r(x, y, &w);z;z = strtok_r(NULL, y, &w))
                                                  ^
    core/utils.c:1953:2: note: in expansion of macro 'uwsgi_foreach_token'
      uwsgi_foreach_token(list2, ",", p, ctx) {
      ^
    ./uwsgi.h:140:70: error: assignment makes pointer from integer without a cast [-Werror=int-conversion]
     #define uwsgi_foreach_token(x, y, z, w) for(z=strtok_r(x, y, &w);z;z = strtok_r(NULL, y, &w))
                                                                          ^
    core/utils.c:1953:2: note: in expansion of macro 'uwsgi_foreach_token'
      uwsgi_foreach_token(list2, ",", p, ctx) {
      ^
    core/utils.c: In function 'uwsgi_list_has_str':
    ./uwsgi.h:140:46: error: assignment makes pointer from integer without a cast [-Werror=int-conversion]
     #define uwsgi_foreach_token(x, y, z, w) for(z=strtok_r(x, y, &w);z;z = strtok_r(NULL, y, &w))
                                                  ^
    core/utils.c:1968:2: note: in expansion of macro 'uwsgi_foreach_token'
      uwsgi_foreach_token(list2, " ", p, ctx) {
      ^
    ./uwsgi.h:140:70: error: assignment makes pointer from integer without a cast [-Werror=int-conversion]
     #define uwsgi_foreach_token(x, y, z, w) for(z=strtok_r(x, y, &w);z;z = strtok_r(NULL, y, &w))
                                                                          ^
    core/utils.c:1968:2: note: in expansion of macro 'uwsgi_foreach_token'
      uwsgi_foreach_token(list2, " ", p, ctx) {
      ^
    core/utils.c:1969:8: error: implicit declaration of function 'strcasecmp' [-Werror=implicit-function-declaration]
       if (!strcasecmp(p, str)) {
            ^
    core/utils.c: In function 'uwsgi_sig_pause':
    core/utils.c:2361:2: error: implicit declaration of function 'sigsuspend' [-Werror=implicit-function-declaration]
      sigsuspend(&mask);
      ^
    core/utils.c: In function 'uwsgi_run_command_putenv_and_wait':
    core/utils.c:2453:7: error: implicit declaration of function 'putenv' [-Werror=implicit-function-declaration]
       if (putenv(envs[i])) {
           ^
    In file included from core/utils.c:1:0:
    core/utils.c: In function 'uwsgi_build_unshare':
    ./uwsgi.h:140:46: error: assignment makes pointer from integer without a cast [-Werror=int-conversion]
     #define uwsgi_foreach_token(x, y, z, w) for(z=strtok_r(x, y, &w);z;z = strtok_r(NULL, y, &w))
                                                  ^
    core/utils.c:2855:2: note: in expansion of macro 'uwsgi_foreach_token'
      uwsgi_foreach_token(list, ",", p, ctx) {
      ^
    ./uwsgi.h:140:70: error: assignment makes pointer from integer without a cast [-Werror=int-conversion]
     #define uwsgi_foreach_token(x, y, z, w) for(z=strtok_r(x, y, &w);z;z = strtok_r(NULL, y, &w))
                                                                          ^
    core/utils.c:2855:2: note: in expansion of macro 'uwsgi_foreach_token'
      uwsgi_foreach_token(list, ",", p, ctx) {
      ^
    core/utils.c: In function 'uwsgi_tmpfd':
    core/utils.c:3533:7: error: implicit declaration of function 'mkstemp' [-Werror=implicit-function-declaration]
      fd = mkstemp(template);
           ^
    core/utils.c: In function 'uwsgi_expand_path':
    core/utils.c:3615:7: error: implicit declaration of function 'realpath' [-Werror=implicit-function-declaration]
      if (!realpath(src, dst)) {
           ^
    core/utils.c: In function 'uwsgi_set_cpu_affinity':
    core/utils.c:3641:3: error: unknown type name 'cpu_set_t'
       cpu_set_t cpuset;
       ^
    core/utils.c:3646:3: error: implicit declaration of function 'CPU_ZERO' [-Werror=implicit-function-declaration]
       CPU_ZERO(&cpuset);
       ^
    core/utils.c:3651:4: error: implicit declaration of function 'CPU_SET' [-Werror=implicit-function-declaration]
        CPU_SET(base_cpu, &cpuset);
        ^
    core/utils.c:3662:7: error: implicit declaration of function 'sched_setaffinity' [-Werror=implicit-function-declaration]
       if (sched_setaffinity(0, sizeof(cpu_set_t), &cpuset)) {
           ^
    core/utils.c:3662:35: error: 'cpu_set_t' undeclared (first use in this function)
       if (sched_setaffinity(0, sizeof(cpu_set_t), &cpuset)) {
                                       ^
    core/utils.c: In function 'uwsgi_thread_run':
    core/utils.c:3782:2: error: implicit declaration of function 'pthread_sigmask' [-Werror=implicit-function-declaration]
      pthread_sigmask(SIG_BLOCK, &smask, NULL);
      ^
    core/utils.c:3782:18: error: 'SIG_BLOCK' undeclared (first use in this function)
      pthread_sigmask(SIG_BLOCK, &smask, NULL);
                      ^
    core/utils.c: In function 'uwsgi_envdir':
    core/utils.c:4349:8: error: implicit declaration of function 'unsetenv' [-Werror=implicit-function-declaration]
        if (unsetenv(de->d_name)) {
            ^
    core/utils.c:4380:7: error: implicit declaration of function 'setenv' [-Werror=implicit-function-declaration]
       if (setenv(de->d_name, content, 1)) {
           ^
    cc1: all warnings being treated as errors

    *** uWSGI compiling server core ***

Any idea what could cause this? I'm installing the following dependencies beforehand:

RUN apk --update add \
        bash \
        python \
        python-dev \
        py-pip \
        gcc \
        zlib-dev \
        git \
        linux-headers \
        build-base \
        musl \
        musl-dev \
        memcached \
        libmemcached-dev

Answer 1

I found this on a GitHub thread. Modified it a bit and works perfectly fine for me on Python 3.5

apk add python3-dev build-base linux-headers pcre-dev
pip install uwsgi

Answer 2

Unfortunately the latest release of uwsgi does not support musl, a glibc alternative that alpine and a couple other distros use. Uwsgi will not build with musl when the ugreen plugin is included (see https://github.com/unbit/uwsgi/pull/522), so you still cannot pip install uwsgi. However, if you build uwsgi with the environment variable UWSGI_PROFILE=corethe build should succeed; but if will fail at runtime due to the issues solved here (https://github.com/unbit/uwsgi/pull/1210). This probably grim news -- I know it was for me -- but at least it looks like the uwsgi team is taking time to address its issues running on musl. Hopefully it will work in the next release.