Fixes needed to compile with musl C library

Patch originally by Codarren Velvindron

configure.cmake

@@ -199,6 +199,7 @@ CHECK_INCLUDE_FILES (netinet/in.h HAVE_NETINET_IN_H)
 CHECK_INCLUDE_FILES (paths.h HAVE_PATHS_H)
 CHECK_INCLUDE_FILES (port.h HAVE_PORT_H)
 CHECK_INCLUDE_FILES (poll.h HAVE_POLL_H)
+CHECK_INCLUDE_FILES (sys/poll.h HAVE_SYS_POLL_H)
 CHECK_INCLUDE_FILES (pwd.h HAVE_PWD_H)
 CHECK_INCLUDE_FILES (sched.h HAVE_SCHED_H)
 CHECK_INCLUDE_FILES (select.h HAVE_SELECT_H)

include/my_net.h

@@ -36,9 +36,11 @@ C_MODE_START
 #ifdef HAVE_ARPA_INET_H
 #include <arpa/inet.h>
 #endif
-#ifdef HAVE_POLL
+#if defined(HAVE_POLL_H)
+#include <poll.h>
+#elif defined(HAVE_SYS_POLL_H)
 #include <sys/poll.h>
-#endif
+#endif /* defined(HAVE_POLL_H) */
 #ifdef HAVE_SYS_IOCTL_H
 #include <sys/ioctl.h>
 #endif

libmysql/libmysql.c

@@ -47,9 +47,11 @@
 #include <sys/select.h>
 #endif
 #endif /* !defined(__WIN__) */
-#ifdef HAVE_POLL
+#if defined(HAVE_POLL_H)
+#include <poll.h>
+#elif defined(HAVE_SYS_POLL_H)
 #include <sys/poll.h>
-#endif
+#endif /* defined(HAVE_POLL_H) */
 #ifdef HAVE_SYS_UN_H
 #include <sys/un.h>
 #endif

storage/mroonga/vendor/groonga/lib/com.c

@@ -348,7 +348,7 @@ grn_com_event_add(grn_ctx *ctx, grn_com_event *ev, grn_sock fd, int events, grn_
     struct epoll_event e;
     memset(&e, 0, sizeof(struct epoll_event));
     e.data.fd = (fd);
-    e.events = (__uint32_t) events;
+    e.events = (uint32_t) events;
     if (epoll_ctl(ev->epfd, EPOLL_CTL_ADD, (fd), &e) == -1) {
       SERR("epoll_ctl");
       return ctx->rc;
@@ -396,7 +396,7 @@ grn_com_event_mod(grn_ctx *ctx, grn_com_event *ev, grn_sock fd, int events, grn_
       struct epoll_event e;
       memset(&e, 0, sizeof(struct epoll_event));
       e.data.fd = (fd);
-      e.events = (__uint32_t) events;
+      e.events = (uint32_t) events;
       if (epoll_ctl(ev->epfd, EPOLL_CTL_MOD, (fd), &e) == -1) {
         SERR("epoll_ctl");
         return ctx->rc;

storage/mroonga/vendor/groonga/lib/grn_com.h

@@ -83,7 +83,11 @@ GRN_API grn_com_queue_entry *grn_com_queue_deque(grn_ctx *ctx, grn_com_queue *q)
 #   define GRN_COM_POLLIN  EVFILT_READ
 #   define GRN_COM_POLLOUT EVFILT_WRITE
 #  else /* USE_KQUEUE */
+#    if defined(HAVE_POLL_H)
+#      include <poll.h>
+#    elif defined(HAVE_SYS_POLL_H)
 #      include <sys/poll.h>
+#    endif /* defined(HAVE_POLL_H) */
 #   define GRN_COM_POLLIN  POLLIN
 #   define GRN_COM_POLLOUT POLLOUT
 #  endif /* USE_KQUEUE */

storage/tokudb/PerconaFT/cmake_modules/TokuFeatureDetection.cmake

@@ -93,7 +93,7 @@ if (NOT HAVE_BACKTRACE_WITHOUT_EXECINFO)
   if (HAVE_BACKTRACE_WITH_EXECINFO)
     list(APPEND EXTRA_SYSTEM_LIBS execinfo)
   else ()
-    message(FATAL_ERROR "Cannot find backtrace(), even with -lexecinfo.")
+    message(WARNING "Cannot find backtrace(), even with -lexecinfo.")
   endif ()
 endif ()
 

strings/my_vsnprintf.c

@@ -831,7 +831,7 @@ void my_strerror(char *buf, size_t len, int nr)
        (defined _XOPEN_SOURCE   && (_XOPEN_SOURCE >= 600)))      &&    \
       ! defined _GNU_SOURCE
     strerror_r(nr, buf, len);             /* I can build with or without GNU */
-#elif defined _GNU_SOURCE
+#elif defined(__GLIBC__) && defined (_GNU_SOURCE)
     char *r= strerror_r(nr, buf, len);
     if (r != buf)                         /* Want to help, GNU? */
       strmake(buf, r, len - 1);           /* Then don't. */