Subj : OSX Build Issue w/ libjs.so
To   : netscape.public.mozilla.jseng
From : Sajid Raza
Date : Thu May 27 2004 06:55 pm

Well, my case, may be very specific, its working but I thought it might 
be worth sharing:

Basically, I'm using loading libraries into Apache, SpiderMonkey's 
libjso.so is one of them. Everything works perfectly on Linux/X86. On 
Mac OSX, the shared library builds fine, but loading it into Apache 
generates:

libjs.so (not a Mach-O file, bad magic number)

 From a bit of Googling it seems I need to do two things, the first of 
which seems dubious:

Build all source with -fno-common

 From OSX libtool man page:
"Dynamically  linked libraries  have two restrictions: No symbol may be 
defined in more than one object file and no common symbol can be used."

Since the OSX libtool's a little different run (static is the default):

libtool -dynamic  -framework System -o Darwin_DBG.OBJ/libjs.so 
Darwin_DBG.OBJ/jsapi.o Darwin_DBG.OBJ/jsarena.o Darwin_DBG.OBJ/jsarray.o 
Darwin_DBG.OBJ/jsatom.o Darwin_DBG.OBJ/jsbool.o Darwin_DBG.OBJ/jscntxt.o 
Darwin_DBG.OBJ/jsdate.o Darwin_DBG.OBJ/jsdbgapi.o 
Darwin_DBG.OBJ/jsdhash.o Darwin_DBG.OBJ/jsdtoa.o Darwin_DBG.OBJ/jsemit.o 
Darwin_DBG.OBJ/jsexn.o Darwin_DBG.OBJ/jsfun.o Darwin_DBG.OBJ/jsgc.o 
Darwin_DBG.OBJ/jshash.o Darwin_DBG.OBJ/jsinterp.o 
Darwin_DBG.OBJ/jslock.o Darwin_DBG.OBJ/jslog2.o Darwin_DBG.OBJ/jslong.o 
Darwin_DBG.OBJ/jsmath.o Darwin_DBG.OBJ/jsnum.o Darwin_DBG.OBJ/jsobj.o 
Darwin_DBG.OBJ/jsopcode.o Darwin_DBG.OBJ/jsparse.o 
Darwin_DBG.OBJ/jsprf.o Darwin_DBG.OBJ/jsregexp.o Darwin_DBG.OBJ/jsscan.o 
Darwin_DBG.OBJ/jsscope.o Darwin_DBG.OBJ/jsscript.o 
Darwin_DBG.OBJ/jsstr.o Darwin_DBG.OBJ/jsutil.o Darwin_DBG.OBJ/jsxdrapi.o 
Darwin_DBG.OBJ/prmjtime.o   -Lfdlibm/Darwin_DBG.OBJ -lfdm -lgcc

The difference being the switch -dynamic, and -lgcc.

When I tried manually linking against the libjs.so generated by the 
original config scripts, I received errors.

-S

.