+AC_CHECK_LIB(gc, GC_malloc, found_boehm="yes")
+gc=auto
+AC_ARG_WITH(gc, [ --with-gc=boehm,none],[gc=$with_gc])
+
+case "x$gc" in
+ xboehm|xyes)
+ if test "x$found_boehm" != "xyes"; then
+ AC_MSG_ERROR("GC requested but libgc not found!")
+ fi
+
+ AC_DEFINE(HAVE_BOEHM_GC)
+ AC_SUBST(HAVE_BOEHM_GC)
+ LIBS="$LIBS -lgc"
+ ;;
+ xnone)
+ AC_MSG_WARN("Compiling mono without GC.")
+ ;;
+ *)
+dnl When the JIT works with libgc, use this chunk.
+dnl # If libgc was found, use it. Otherwise just warn.
+ if test "x$found_boehm" != "xyes"; then
+ AC_MSG_WARN("Compiling mono without GC.")
+ else
+ AC_DEFINE(HAVE_BOEHM_GC)
+ AC_SUBST(HAVE_BOEHM_GC)
+ LIBS="$LIBS -lgc"
+ gc="boehm"
+ fi
+dnl AC_MSG_WARN("Compiling mono without GC.")
+ ;;
+esac
+
+if test x$platform_win32 = xno; then
+ dnl ******************************************************************
+ dnl *** Check for large file support ***
+ dnl *** (If we were using autoconf 2.50 we'd use AC_SYS_LARGEFILE) ***
+ dnl ******************************************************************
+
+ # Check that off_t can represent 2**63 - 1 correctly, working around
+ # potential compiler bugs. Defines LARGE_FILE_SUPPORT, adds $1 to
+ # CPPFLAGS and sets $large_offt to yes if the test succeeds
+ large_offt=no
+ AC_DEFUN(LARGE_FILES, [
+ large_CPPFLAGS=$CPPFLAGS
+ CPPFLAGS="$CPPFLAGS $1"
+ AC_TRY_RUN([
+ #include <sys/types.h>
+
+ #define BIG_OFF_T (((off_t)1<<62)-1+((off_t)1<<62))
+
+ int main(void) {
+ int big_off_t=((BIG_OFF_T%2147483629==721) &&
+ (BIG_OFF_T%2147483647==1));
+ if(big_off_t) {
+ exit(0);
+ } else {
+ exit(1);
+ }
+ }
+ ], [
+ AC_MSG_RESULT(ok)
+ AC_DEFINE(HAVE_LARGE_FILE_SUPPORT)
+ large_CPPFLAGS="$large_CPPFLAGS $1"
+ large_offt=yes
+ ], [
+ AC_MSG_RESULT(no)
+ ], "")
+ CPPFLAGS=$large_CPPFLAGS
+ ])
+
+ AC_MSG_CHECKING(if off_t is 64 bits wide)
+ LARGE_FILES("")
+ if test $large_offt = no; then
+ AC_MSG_CHECKING(if _FILE_OFFSET_BITS=64 gives 64 bit off_t)
+ LARGE_FILES("-D_FILE_OFFSET_BITS=64")
+ fi
+ if test $large_offt = no; then
+ AC_MSG_WARN([No 64 bit file size support available])
+ fi
+
+ dnl *****************************
+ dnl *** Checks for libsocket ***
+ dnl *****************************
+ AC_CHECK_LIB(socket, socket, LIBS="$LIBS -lsocket")
+
+ dnl *******************************
+ dnl *** Checks for MSG_NOSIGNAL ***
+ dnl *******************************
+ AC_MSG_CHECKING(for MSG_NOSIGNAL)
+ AC_TRY_COMPILE([#include <sys/socket.h>], [
+ int f = MSG_NOSIGNAL;
+ ], [
+ # Yes, we have it...
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_MSG_NOSIGNAL)
+ ], [
+ # We'll have to use signals
+ AC_MSG_RESULT(no)
+ ])
+
+ dnl *****************************
+ dnl *** Checks for SOL_IP ***
+ dnl *****************************
+ AC_MSG_CHECKING(for SOL_IP)
+ AC_TRY_COMPILE([#include <netdb.h>], [
+ int level = SOL_IP;
+ ], [
+ # Yes, we have it...
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_SOL_IP)
+ ], [
+ # We'll have to use getprotobyname
+ AC_MSG_RESULT(no)
+ ])
+
+ dnl *****************************
+ dnl *** Checks for SOL_TCP ***
+ dnl *****************************
+ AC_MSG_CHECKING(for SOL_TCP)
+ AC_TRY_COMPILE([#include <netdb.h>], [
+ int level = SOL_TCP;
+ ], [
+ # Yes, we have it...
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_SOL_TCP)
+ ], [
+ # We'll have to use getprotobyname
+ AC_MSG_RESULT(no)
+ ])
+
+ dnl *****************************
+ dnl *** Checks for IP_PKTINFO ***
+ dnl *****************************
+ AC_MSG_CHECKING(for IP_PKTINFO)
+ AC_TRY_COMPILE([#include <netdb.h>], [
+ int level = IP_PKTINFO;
+ ], [
+ # Yes, we have it...
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_IP_PKTINFO)
+ ], [
+ AC_MSG_RESULT(no)
+ ])
+
+ dnl *********************************
+ dnl *** Check for struct ip_mreqn ***
+ dnl *********************************
+ AC_MSG_CHECKING(for struct ip_mreqn)
+ AC_TRY_COMPILE([#include <netinet/in.h>], [
+ struct ip_mreqn mreq;
+ mreq.imr_address.s_addr = 0;
+ ], [
+ # Yes, we have it...
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_STRUCT_IP_MREQN)
+ ], [
+ # We'll just have to use struct ip_mreq
+ AC_MSG_RESULT(no)
+ ])
+
+ dnl *****************************
+ dnl *** Checks for libnsl ***
+ dnl *****************************
+ AC_CHECK_LIB(nsl, gethostbyaddr, LIBS="$LIBS -lnsl")
+
+ AC_CHECK_FUNCS(inet_pton inet_aton)
+
+ dnl *****************************
+ dnl *** Checks for libpthread ***
+ dnl *****************************
+ AC_SEARCH_LIBS(pthread_create, pthread c_r, [