[glib: 1/2] Remove NO_FD_SET and assume fd_set exists

[Emmanuele Bassi <ebassi src gnome org>]

commit b6c81d139c3981451572d69296493e844244be09
Author: Christoph Reiter <creiter src gnome org>
Date:   Thu May 31 13:17:12 2018 +0200

    Remove NO_FD_SET and assume fd_set exists
    
    gspawn.c is using fd_set without checks for 17 years now and the NO_FD_SET check was added
    19 years ago.

 config.h.meson    |  3 ---
 config.h.win32.in |  3 ---
 configure.ac      | 18 ------------------
 glib/gbacktrace.c | 16 ++--------------
 glib/gpoll.c      | 15 +--------------
 5 files changed, 3 insertions(+), 52 deletions(-)
---
diff --git a/config.h.meson b/config.h.meson
index fd0bfcaf9..f134cac35 100644
--- a/config.h.meson
+++ b/config.h.meson
@@ -668,9 +668,6 @@
 /* Do we cache iconv descriptors */
 #mesondefine NEED_ICONV_CACHE
 
-/* didn't find fd_set */
-#mesondefine NO_FD_SET
-
 /* Define to the address where bug reports for this package should be sent. */
 #mesondefine PACKAGE_BUGREPORT
 
diff --git a/config.h.win32.in b/config.h.win32.in
index 14ac11d39..c8e393b2f 100644
--- a/config.h.win32.in
+++ b/config.h.win32.in
@@ -683,9 +683,6 @@
 /* Do we cache iconv descriptors */
 /* #undef NEED_ICONV_CACHE */
 
-/* didn't find fd_set */
-/* #undef NO_FD_SET */
-
 /* Define to the address where bug reports for this package should be sent. */
 #define PACKAGE_BUGREPORT "http://bugzilla.gnome.org/enter_bug.cgi?product=glib";
 
diff --git a/configure.ac b/configure.ac
index be48c9a19..6df0dfa82 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1221,24 +1221,6 @@ jm_AC_TYPE_INTMAX_T
 AC_CHECK_FUNCS([snprintf strnlen wcslen wcsnlen mbrtowc wcrtomb])
 AC_FUNC_SNPRINTF_C99
 
-# Check if <sys/select.h> needs to be included for fd_set
-AC_MSG_CHECKING([for fd_set])
-AC_TRY_COMPILE([#include <sys/types.h>],
-        [fd_set readMask, writeMask;], gtk_ok=yes, gtk_ok=no)
-AS_IF([test "$gtk_ok" = "yes"], [
-    AC_MSG_RESULT([yes, found in sys/types.h])
-], [
-    AC_EGREP_HEADER(fd_set, sys/select.h, gtk_ok=yes)
-    if test "$gtk_ok" = "yes"; then
-       # *** FIXME: give it a different name
-        AC_DEFINE(HAVE_SYS_SELECT_H,1,[found fd_set in sys/select.h])
-        AC_MSG_RESULT([yes, found in sys/select.h])
-    else
-       AC_DEFINE(NO_FD_SET,1,[didn't find fd_set])
-       AC_MSG_RESULT(no)
-    fi
-])
-
 dnl Check for nl_langinfo and CODESET
 AC_LANG_SAVE
 AC_LANG_C
diff --git a/glib/gbacktrace.c b/glib/gbacktrace.c
index d29f4fad6..e83079985 100644
--- a/glib/gbacktrace.c
+++ b/glib/gbacktrace.c
@@ -68,18 +68,6 @@
 #include "gprintfint.h"
 #include "gutils.h"
 
-
-#ifndef NO_FD_SET
-#  define SELECT_MASK fd_set
-#else
-#  if defined(_IBMR2)
-#    define SELECT_MASK void
-#  else
-#    define SELECT_MASK int
-#  endif
-#endif
-
-
 #ifndef G_OS_WIN32
 static void stack_trace (const char * const *args);
 #endif
@@ -274,8 +262,8 @@ stack_trace (const char * const *args)
   pid_t pid;
   int in_fd[2];
   int out_fd[2];
-  SELECT_MASK fdset;
-  SELECT_MASK readset;
+  fd_set fdset;
+  fd_set readset;
   struct timeval tv;
   int sel, idx, state;
   char buffer[256];
diff --git a/glib/gpoll.c b/glib/gpoll.c
index 01d19c048..5f46906ba 100644
--- a/glib/gpoll.c
+++ b/glib/gpoll.c
@@ -333,26 +333,13 @@ g_poll (GPollFD *fds,
 #include <sys/select.h>
 #endif /* HAVE_SYS_SELECT_H */
 
-#ifndef NO_FD_SET
-#  define SELECT_MASK fd_set
-#else /* !NO_FD_SET */
-#  ifndef _AIX
-typedef long fd_mask;
-#  endif /* _AIX */
-#  ifdef _IBMR2
-#    define SELECT_MASK void
-#  else /* !_IBMR2 */
-#    define SELECT_MASK int
-#  endif /* !_IBMR2 */
-#endif /* !NO_FD_SET */
-
 gint
 g_poll (GPollFD *fds,
        guint    nfds,
        gint     timeout)
 {
   struct timeval tv;
-  SELECT_MASK rset, wset, xset;
+  fd_set rset, wset, xset;
   GPollFD *f;
   int ready;
   int maxfd = 0;