Another Compass install error

Question

Here's the whole error. I am running OSX 10.9.1 and have installed xcode through terminal. I also updated Ruby. I've been trying everything but am about to give up on Compass if installing is this much of a hassle. This is the first time I've used the terminal so I don't know why it wouldn't be working. Sorry the formatting on this got kind of messed up:

$ sudo gem install compass
Building native extensions.  This could take a while...
ERROR:  Error installing compass:
    ERROR: Failed to build gem native extension.

    /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby -r ./siteconf20141002-5573-1kq3o00.rb extconf.rb
checking for ffi.h... no
checking for ffi.h in /usr/local/include,/usr/include/ffi... yes
checking for ffi_call() in -lffi... yes
checking for ffi_prep_closure()... yes
checking for ffi_raw_call()... no
checking for rb_thread_blocking_region()... yes
checking for rb_thread_call_with_gvl()... yes
checking for rb_thread_call_without_gvl()... yes
checking for ffi_prep_cif_var()... no
creating extconf.h
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling AbstractMemory.c
compiling ArrayType.c
compiling Buffer.c
compiling Call.c
Call.c:303:5: warning: implicit declaration of function 'rb_thread_call_without_gvl' is invalid in C99 [-Wimplicit-function-declaration]
    rbffi_thread_blocking_region(call_blocking_function, data, (void *) -1, NULL);
    ^
./Thread.h:78:39: note: expanded from macro 'rbffi_thread_blocking_region'
# define rbffi_thread_blocking_region rb_thread_call_without_gvl
                                      ^
1 warning generated.
compiling ClosurePool.c
compiling DataConverter.c
DataConverter.c:43:1: warning: control may reach end of non-void function [-Wreturn-type]
}
^
1 warning generated.
compiling DynamicLibrary.c
compiling ffi.c
compiling Function.c
Function.c:563:9: warning: implicit declaration of function 'rb_thread_call_without_gvl' is invalid in C99 [-Wimplicit-function-declaration]
        rb_thread_call_without_gvl(async_cb_wait, &w, async_cb_stop, &w);
        ^
1 warning generated.
compiling FunctionInfo.c
compiling LastError.c
compiling LongDouble.c
compiling MappedType.c
compiling MemoryPointer.c
compiling MethodHandle.c
compiling Platform.c
compiling Pointer.c
compiling Struct.c
compiling StructByReference.c
compiling StructByValue.c
compiling StructLayout.c
compiling Thread.c
compiling Type.c
compiling Types.c
compiling Variadic.c
linking shared-object ffi_c.bundle
clang: error: unknown argument: '-multiply_definedsuppress'
make: *** [ffi_c.bundle] Error 1

make failed, exit code 2

Answer 1 · 2014-10-02T14:19:24Z

October 2, 2014 2:19pm

John it looks to me like it's trying to compile a few libraries but it's not able to. Do you have Xcode installed? If not, it's a good idea to start there (and it's free on the Mac AppStore), Xcode has all of the compilation tools you'll need for working with Ruby and Ruby extensions. With that installed open up terminal and install the xcode command line tools with xcode-select --install. It seems like a pain if you're just using Compass, but it's really about compiling Ruby gems and extensions. I hope that helps.

Try to stick out the small frustrations. Sass and Compass will greatly improve the way you work with CSS and the initial investment is worth it.

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Another Compass install error

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