Merge branch 'js/poll-emu'

* js/poll-emu:
make poll() work on platforms that can't recv() on a non-socket
poll() exits too early with EFAULT if 1st arg is NULL
fix some win32 specific dependencies in poll.c
make poll available for other platforms lacking it

diff --combined Makefile
index a49d1db2889e7724f48eb81fc1fb3215e8e28a91,d1052a74903f4438fa0c296054a6ce9c31aa9afa..f339f968f18fe04049dbc5f9b3901d8ed63f4d8d
--- 1/Makefile
--- 2/Makefile
+++ b/Makefile
@@@ -154,6 -154,11 +154,11 @@@ all:
  #
  # Define NO_MMAP if you want to avoid mmap.
  #
+ # Define NO_SYS_POLL_H if you don't have sys/poll.h.
+ #
+ # Define NO_POLL if you do not have or don't want to use poll().
+ # This also implies NO_SYS_POLL_H.
+ #
  # Define NO_PTHREADS if you do not have or do not want to use Pthreads.
  #
  # Define NO_PREAD if you have a problem with pread() system call (e.g.
@@@ -509,7 -514,6 +514,7 @@@ TEST_PROGRAMS_NEED_X += test-run-comman
  TEST_PROGRAMS_NEED_X += test-scrap-cache-tree
  TEST_PROGRAMS_NEED_X += test-sha1
  TEST_PROGRAMS_NEED_X += test-sigchain
 +TEST_PROGRAMS_NEED_X += test-string-list
  TEST_PROGRAMS_NEED_X += test-subprocess
  TEST_PROGRAMS_NEED_X += test-svn-fe
  
@@@ -604,10 -608,10 +609,10 @@@ LIB_H += compat/bswap.
  LIB_H += compat/cygwin.h
  LIB_H += compat/mingw.h
  LIB_H += compat/obstack.h
+ LIB_H += compat/poll/poll.h
  LIB_H += compat/precompose_utf8.h
  LIB_H += compat/terminal.h
  LIB_H += compat/win32/dirent.h
- LIB_H += compat/win32/poll.h
  LIB_H += compat/win32/pthread.h
  LIB_H += compat/win32/syslog.h
  LIB_H += connected.h
@@@ -1225,7 -1229,7 +1230,7 @@@ ifeq ($(uname_S),Windows
        NO_PREAD = YesPlease
        NEEDS_CRYPTO_WITH_SSL = YesPlease
        NO_LIBGEN_H = YesPlease
-       NO_SYS_POLL_H = YesPlease
+       NO_POLL = YesPlease
        NO_SYMLINK_HEAD = YesPlease
        NO_IPV6 = YesPlease
        NO_UNIX_SOCKETS = YesPlease
@@@ -1266,7 -1270,7 +1271,7 @@@
        BASIC_CFLAGS = -nologo -I. -I../zlib -Icompat/vcbuild -Icompat/vcbuild/include -DWIN32 -D_CONSOLE -DHAVE_STRING_H -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE
        COMPAT_OBJS = compat/msvc.o compat/winansi.o \
                compat/win32/pthread.o compat/win32/syslog.o \
-               compat/win32/poll.o compat/win32/dirent.o
+               compat/win32/dirent.o
        COMPAT_CFLAGS = -D__USE_MINGW_ACCESS -DNOGDI -DHAVE_STRING_H -DHAVE_ALLOCA_H -Icompat -Icompat/regex -Icompat/win32 -DSTRIP_EXTENSION=\".exe\"
        BASIC_LDFLAGS = -IGNORE:4217 -IGNORE:4049 -NOLOGO -SUBSYSTEM:CONSOLE -NODEFAULTLIB:MSVCRT.lib
        EXTLIBS = user32.lib advapi32.lib shell32.lib wininet.lib ws2_32.lib
@@@ -1321,7 -1325,7 +1326,7 @@@ ifneq (,$(findstring MINGW,$(uname_S))
        NO_PREAD = YesPlease
        NEEDS_CRYPTO_WITH_SSL = YesPlease
        NO_LIBGEN_H = YesPlease
-       NO_SYS_POLL_H = YesPlease
+       NO_POLL = YesPlease
        NO_SYMLINK_HEAD = YesPlease
        NO_UNIX_SOCKETS = YesPlease
        NO_SETENV = YesPlease
@@@ -1356,7 -1360,7 +1361,7 @@@
        COMPAT_CFLAGS += -DSTRIP_EXTENSION=\".exe\"
        COMPAT_OBJS += compat/mingw.o compat/winansi.o \
                compat/win32/pthread.o compat/win32/syslog.o \
-               compat/win32/poll.o compat/win32/dirent.o
+               compat/win32/dirent.o
        EXTLIBS += -lws2_32
        PTHREAD_LIBS =
        X = .exe
@@@ -1610,6 -1614,11 +1615,11 @@@ ifdef NO_GETTEX
        BASIC_CFLAGS += -DNO_GETTEXT
        USE_GETTEXT_SCHEME ?= fallthrough
  endif
+ ifdef NO_POLL
+       NO_SYS_POLL_H = YesPlease
+       COMPAT_CFLAGS += -DNO_POLL -Icompat/poll
+       COMPAT_OBJS += compat/poll/poll.o
+ endif
  ifdef NO_STRCASESTR
        COMPAT_CFLAGS += -DNO_STRCASESTR
        COMPAT_OBJS += compat/strcasestr.o