[Ecls-list] usocket on ECL 9.4.0

[Chun Tian (binghe)]

Hi, ECL community

I met some problems when compiling usocket on ECL 9.4.0, below is the  
error outputs:

=============
;;;   gcc  -g -O2 -fPIC -fno-common -D_THREAD_SAFE  -Ddarwin -O "-I/ 
Users/binghe/include/" -w -c "/private/var/folders/3x/ 
3xMxiHaQGSqRfjv9Z200B++++TI/-Tmp-/ECLINIThcmJG7.c" -o "/private/var/ 
folders/3x/3xMxiHaQGSqRfjv9Z200B++++TI/-Tmp-/ECLINIThcmJG7.o"
;;; Note: Invoking external command:
Undefined symbols:
   "_cl_alloc_atomic", referenced from:
       _L2fdset_alloc in sbcl.o
       _L7get_host_name in sbcl.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
(SYSTEM "gcc -o \"/Volumes/User/Lisp/usocket/trunk/backend/sbcl.fas\" - 
L\"/Users/binghe/lib/\" \"/private/var/folders/3x/3xMxiHaQGSqRfjv9Z200B 
++++TI/-Tmp-/ECLINIThcmJG7.o\" \"/Volumes/User/Lisp/usocket/trunk/ 
backend/sbcl.o\"  -bundle    -lecl -lpthread   -lm  ") returned non- 
zero value 1
;;;   gcc -o "/Volumes/User/Lisp/usocket/trunk/backend/sbcl.fas" -L"/ 
Users/binghe/lib/" "/private/var/folders/3x/3xMxiHaQGSqRfjv9Z200B+++ 
+TI/-Tmp-/ECLINIThcmJG7.o" "/Volumes/User/Lisp/usocket/trunk/backend/ 
sbcl.o"  -bundle    -lecl -lpthread   -lm  Broken at  
SI:BYTECODES.Available restarts:
1. (CONTINUE) Continues anyway.
2. (TRY-RECOMPILING) Try recompiling sbcl
3. (RETRY) Retry performing #<ASDF:COMPILE-OP NIL 29930936> on  
#<ASDF:CL-SOURCE-FILE "sbcl" "usocket" 29830384>.
4. (ACCEPT) Continue, treating #<ASDF:COMPILE-OP NIL 29930936> on  
#<ASDF:CL-SOURCE-FILE "sbcl" "usocket" 29830384> as having been  
successful.
=============

I think following code in usocket break above build:

   (defun fdset-alloc ()
     (ffi:c-inline () () :pointer-void
      "cl_alloc_atomic(sizeof(fd_set))" :one-liner t))

It seems that the function "cl_alloc_atomic" doesn't exist anymore.

1. What should we (usocket) do instead in ECL 9.4.0?
2. Is there anyway to detect the exist of "cl_alloc_atomic" in any ECL  
versions? (ECL doesn't put any version information in CL *features*,  
and we (usocket) want to support more ECL versions as many as possible)

Regards,

Chun Tian (binghe)