I managed to flub sending this yesterday.
This is the gcc/configure.ac changes (rebuild configure and config.h.in
after applying). Generally just checking for network-related
functionality. If it's not available, those features of the module
mapper will be unavailable.
nathan
--
Nathan Sidwell
diff --git c/gcc/configure.ac w/gcc/configure.ac
index 73034bb902b..168a3bc3625 100644
--- c/gcc/configure.ac
+++ w/gcc/configure.ac
@@ -1417,8 +1419,8 @@ define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
putchar_unlocked putc_unlocked)
AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoq \
popen sysconf strsignal getrusage nl_langinfo \
- gettimeofday mbstowcs wcswidth mmap setlocale \
- gcc_UNLOCKED_FUNCS madvise mallinfo mallinfo2)
+ gettimeofday mbstowcs wcswidth mmap memrchr posix_fallocate setlocale \
+ gcc_UNLOCKED_FUNCS madvise mallinfo execv mallinfo2 fstatat)
if test x$ac_cv_func_mbstowcs = xyes; then
AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
@@ -1440,6 +1442,10 @@ fi
AC_CHECK_TYPE(ssize_t, int)
AC_CHECK_TYPE(caddr_t, char *)
+AC_CHECK_TYPE(sighander_t,
+ AC_DEFINE(HAVE_SIGHANDLER_T, 1,
+[Define if defines sighandler_t]),
+,signal.h)
GCC_AC_FUNC_MMAP_BLACKLIST
@@ -1585,6 +1591,146 @@ if test $ac_cv_f_setlkw = yes; then
[Define if F_SETLKW supported by fcntl.])
fi
+# Check if O_CLOEXEC is defined by fcntl
+AC_CACHE_CHECK(for O_CLOEXEC, ac_cv_o_cloexec, [
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include ]], [[
+return open ("/dev/null", O_RDONLY | O_CLOEXEC);]])],
+[ac_cv_o_cloexec=yes],[ac_cv_o_cloexec=no])])
+if test $ac_cv_o_cloexec = yes; then
+ AC_DEFINE(HOST_HAS_O_CLOEXEC, 1,
+ [Define if O_CLOEXEC supported by fcntl.])
+fi
+
+# C++ Modules would like some networking features to provide the mapping
+# server. You can still use modules without them though.
+# The following network-related checks could probably do with some
+# Windows and other non-linux defenses and checking.
+
+# Local socket connectivity wants AF_UNIX networking
+# Check for AF_UNIX networking
+AC_CACHE_CHECK(for AF_UNIX, ac_cv_af_unix, [
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include
+#include
+#include
+#include ]],[[
+sockaddr_un un;
+un.sun_family = AF_UNSPEC;
+int fd = socket (AF_UNIX, SOCK_STREAM, 0);
+connect (fd, (sockaddr *)&un, sizeof (un));]])],
+[ac_cv_af_unix=yes],
+[ac_cv_af_unix=no])])
+if test $ac_cv_af_unix = yes; then
+ AC_DEFINE(HAVE_AF_UNIX, 1,
+ [Define if AF_UNIX supported.])
+fi
+
+# Remote socket connectivity wants AF_INET6 networking
+# Check for AF_INET6 networking
+AC_CACHE_CHECK(for AF_INET6, ac_cv_af_inet6, [
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include
+#include
+#include
+#include ]],[[
+sockaddr_in6 in6;
+in6.sin6_family = AF_UNSPEC;
+struct addrinfo *addrs = 0;
+struct addrinfo hints;
+hints.ai_flags = 0;
+hints.ai_family = AF_INET6;
+hints.ai_socktype = SOCK_STREAM;
+hints.ai_protocol = 0;
+hints.ai_canonname = 0;
+hints.ai_addr = 0;
+hints.ai_next = 0;
+int e = getaddrinfo ("localhost", 0, &hints, &addrs);
+const char *str = gai_strerror (e);
+freeaddrinfo (addrs);
+int fd = socket (AF_INET6, SOCK_STREAM, 0);
+connect (fd, (sockaddr *)&in6, sizeof (in6));]])],
+[ac_cv_af_inet6=yes],
+[ac_cv_af_inet6=no])])
+if test $ac_cv_af_inet6 = yes; then
+ AC_DEFINE(HAVE_AF_INET6, 1,
+ [Define if AF_INET6 supported.])
+fi
+
+# Efficient server response wants epoll
+# Check for epoll_create, epoll_ctl, epoll_pwait
+AC_CACHE_CHECK(for epoll, ac_cv_epoll, [
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include ]],[[
+int fd = epoll_create (1);
+epoll_event ev;
+ev.events = EPOLLIN;
+ev.data.fd = 0;
+epoll_ctl (fd, EPOLL_CTL_ADD, 0, &ev);
+epoll_pwait (fd, 0, 0, -1, 0);]])],
+[ac_cv_epoll=yes],
+[ac_cv_epoll=no])])
+if test $ac_cv_epoll = yes; then
+ AC_DEFINE(HAVE_EPOLL, 1,
+ [Define if epoll_create, epoll_ctl, epoll_pwait provided.])
+fi
+
+# If we can't use epoll, try pselect.
+# Check for pselect
+AC_CACHE_CHECK(for pselect, ac_cv_pselect, [
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include ]],[[
+pselect (0, 0, 0, 0, 0, 0);]])],
+[ac_cv_pselect=yes],
+[ac_cv_pselect=no])])
+if test $ac_cv_pselect = yes; then
+ AC_DEFINE(HAVE_PSELECT, 1,
+ [Define if pselect provided.])
+fi
+
+# And failing that, use good old select.
+# If we can't even use this, the server is serialized.
+# Check for select
+AC_CACHE_CHECK(for select, ac_cv_select, [
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include ]],[[
+select (0, 0, 0, 0, 0);]])],
+[ac_cv_select=yes],
+[ac_cv_select=no])])
+if test $ac_cv_select = yes; then
+ AC_DEFINE(HAVE_SELECT, 1,
+ [Define if select provided.])
+fi
+
+# Avoid some fnctl calls by using accept4, when available.
+# Check for accept4
+AC_CACHE_CHECK(for accept4, ac_cv_accept4, [
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include ]],[[
+int err = accept4 (1, 0, 0, SOCK_NONBLOCK);]])],
+[ac_cv_accept4=yes],
+[ac_cv_accept4=no])])
+if test $ac_cv_accept4 = yes; then
+ AC_DEFINE(HAVE_ACCEPT4, 1,
+ [Define i
