gistfile1.txt

cat /Users/richard/.rvm/log/ruby-1.9.3-p0-fast/make.log
[2012-01-24 11:44:18] make 
	CC = clang
	LD = ld
	LDSHARED = clang -dynamiclib
	CFLAGS = -O3 -ggdb -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Werror=pointer-arith -Werror=write-strings -Werror=declaration-after-statement -Werror=shorten-64-to-32 -Werror=implicit-function-declaration  -fno-common -pipe
	XCFLAGS = -include ruby/config.h -include ruby/missing.h -fvisibility=hidden -DRUBY_EXPORT
	CPPFLAGS = -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -I. -I.ext/include/x86_64-darwin11.2.0 -I./include -I.
	DLDFLAGS = -Wl,-undefined,dynamic_lookup -Wl,-multiply_defined,suppress -Wl,-flat_namespace -install_name /Users/richard/.rvm/rubies/ruby-1.9.3-p0-fast/lib/libruby.1.9.1.dylib -current_version 1.9.1 -compatibility_version 1.9.1 -Wl,-unexported_symbol,_Init_* -Wl,-unexported_symbol,*_threadptr_*  -Wl,-u,_objc_msgSend   
	SOLIBS = 
compiling main.c
compiling dmydln.c
compiling dmyencoding.c
compiling version.c
compiling dmyversion.c
compiling miniprelude.c
compiling array.c
compiling bignum.c
compiling class.c
compiling compar.c
compiling complex.c
compiling dir.c
compiling dln_find.c
compiling enum.c
compiling enumerator.c
compiling error.c
compiling eval.c
compiling load.c
load.c:49:4: error: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
                        RARRAY_LEN(load_path), RARRAY_PTR(load_path),
                        ^~~~~~~~~~~~~~~~~~~~~
./include/ruby/ruby.h:695:6: note: instantiated from:
     (long)((RBASIC(a)->flags >> RARRAY_EMBED_LEN_SHIFT) & \
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
load.c:49:4: error: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
                        RARRAY_LEN(load_path), RARRAY_PTR(load_path),
                        ^~~~~~~~~~~~~~~~~~~~~
./include/ruby/ruby.h:697:25: note: instantiated from:
     RARRAY(a)->as.heap.len)
                        ^
load.c:282:36: error: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
        return ext && !strchr(ext, '/') ? ext - feature : flen;
                                        ~ ^~~~~~~~~~~~~
load.c:282:52: error: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
        return ext && !strchr(ext, '/') ? ext - feature : flen;
                                        ~                 ^~~~
load.c:323:26: error: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
        int before = 0, first = RARRAY_LEN(features);
                                ^~~~~~~~~~~~~~~~~~~~
./include/ruby/ruby.h:695:6: note: instantiated from:
     (long)((RBASIC(a)->flags >> RARRAY_EMBED_LEN_SHIFT) & \
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
load.c:323:26: error: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
        int before = 0, first = RARRAY_LEN(features);
                                ^~~~~~~~~~~~~~~~~~~~
./include/ruby/ruby.h:697:25: note: instantiated from:
     RARRAY(a)->as.heap.len)
                        ^
load.c:349:26: error: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
        int before = 0, first = RARRAY_LEN(features);
                                ^~~~~~~~~~~~~~~~~~~~
./include/ruby/ruby.h:695:6: note: instantiated from:
     (long)((RBASIC(a)->flags >> RARRAY_EMBED_LEN_SHIFT) & \
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
load.c:349:26: error: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
        int before = 0, first = RARRAY_LEN(features);
                                ^~~~~~~~~~~~~~~~~~~~
./include/ruby/ruby.h:697:25: note: instantiated from:
     RARRAY(a)->as.heap.len)
                        ^
load.c:368:9: error: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
        return RARRAY_LEN(features);
               ^~~~~~~~~~~~~~~~~~~~
./include/ruby/ruby.h:695:6: note: instantiated from:
     (long)((RBASIC(a)->flags >> RARRAY_EMBED_LEN_SHIFT) & \
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
load.c:368:9: error: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
        return RARRAY_LEN(features);
               ^~~~~~~~~~~~~~~~~~~~
./include/ruby/ruby.h:697:25: note: instantiated from:
     RARRAY(a)->as.heap.len)
                        ^
load.c:402:20: error: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
        rb_push_feature_m(RARRAY_LEN(add), RARRAY_PTR(add), features);
                          ^~~~~~~~~~~~~~~
./include/ruby/ruby.h:695:6: note: instantiated from:
     (long)((RBASIC(a)->flags >> RARRAY_EMBED_LEN_SHIFT) & \
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
load.c:402:20: error: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
        rb_push_feature_m(RARRAY_LEN(add), RARRAY_PTR(add), features);
                          ^~~~~~~~~~~~~~~
./include/ruby/ruby.h:697:25: note: instantiated from:
     RARRAY(a)->as.heap.len)
                        ^
load.c:1112:36: error: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
    return rb_funcall2(self, push, RARRAY_LEN(ary), RARRAY_PTR(ary));
                                   ^~~~~~~~~~~~~~~
./include/ruby/ruby.h:695:6: note: instantiated from:
     (long)((RBASIC(a)->flags >> RARRAY_EMBED_LEN_SHIFT) & \
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
load.c:1112:36: error: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
    return rb_funcall2(self, push, RARRAY_LEN(ary), RARRAY_PTR(ary));
                                   ^~~~~~~~~~~~~~~
./include/ruby/ruby.h:697:25: note: instantiated from:
     RARRAY(a)->as.heap.len)
                        ^
14 errors generated.
make: *** [load.o] Error 1

@moomerman, thank you for a report. Unfortunately I don't have Mac, so that could not find the bag by myself.
Could you try https://gist.github.com/1672977 ? Let's work on adaptation to Mac there, and when it will compile, I'll update this Gist and correlated patches.