I moved the file from the Darwin-XXX folder inside spidermonkey to spider monkey/libjs to get through this error.

Here's another error.
...

In file included from ./spidermonkey/libjs/jsarena.c:49:
./spidermonkey/libjs/jsbit.h:169: error: size of array ‘js_static_assert_line_169’ is negative ./spidermonkey/libjs/jsarena.c: In function ‘JS_InitArenaPool’: ./spidermonkey/libjs/jsarena.c:68: warning: implicit conversion shortens 64-bit value into a 32-bit value lipo: can't open input file: /var/folders/_y/ckd6n2xs7x59060cr1w25dqc0000gn/T//ccsAlSOF.out (No such file or directory)
error: command 'llvm-gcc-4.2' failed with exit status 1

To get through this error, I changed line 76 of jsutil.h from:
typedef int js_static_assert_line##line[(condition) ? 1 : -1]
to:
typedef int js_static_assert_line##line[(condition) ? 1 : 0]

I'm not sure. There's also this patch that I haven't had time to test thoroughly but might help you:

https://github.com/kencochrane/python-spidermonkey/commit/6859fc37b...

Also working with the patch that you've mentioned in another ticket didn't work so far.
Here's the output that I've got for
building:
http://pastebin.com/n5LSY36c
and testing:
http://pastebin.com/YF1VAsLx

My C++ skills are not that good to tackle this thing alone, but one idea would be if there are some problems with 64bit systems?

Searching for this error

In file included from ./spidermonkey/libjs/jsarena.c:49:
spidermonkey/libjs/jsbit.h:169:1: error: 'js_static_assert_line_169' declared as an array with a negative size
JS_STATIC_ASSERT(sizeof(unsigned) == sizeof(JSUword));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
spidermonkey/libjs/jsutil.h:72:5: note: expanded from macro 'JS_STATIC_ASSERT'
    JS_STATIC_ASSERT_IMPL(condition, __LINE__)
    ^
spidermonkey/libjs/jsutil.h:74:5: note: expanded from macro 'JS_STATIC_ASSERT_IMPL'
    JS_STATIC_ASSERT_IMPL2(condition, line)
    ^
spidermonkey/libjs/jsutil.h:76:46: note: expanded from macro 'JS_STATIC_ASSERT_IMPL2'
    typedef int js_static_assert_line_##line[(condition) ? 1 : -1]
                                             ^~~~~~~~~~~~~~~~~~~~
1 error generated.
error: command '/usr/bin/clang' failed with exit status 1

i've found this page Link
There is a comment mentioning:

I have an idea that you should be using the 64-bit version of jsautocfg.h, not the 32-bit one. :-)

Is this version of python-spidermonkey only for 32bit systems?

Thanks

I see there are some forks trying to fix these issues, but I don't see anything being merged into the main repo. Is this project still being worked on? After making all the above changes it can be compiled but python crashes when you try to execute javascript.