librsvg:: not big endian, needs port:cargo added in depends_lib

[gaming-hacker (G Alexander)]

Hello,

I built and installed

rust @1.25.0_0 (active) 

then proceeded to update librsvg

  $ ./configure --prefix=/opt/local --enable-vala=yes --disable-silent-rules --disable-Bsymbolic --enable-introspection

and got the following error

conftest.c:28:4: error: use of undeclared identifier 'not'
                 not big endian

configure:13833: checking for cargo

configure:13861: result: no

configure:13870: error: cargo is required.  Please install the Rust toolchain from https://www.rust-lang.org/

configure: failed program was:

| /* confdefs.h */

| #define PACKAGE_NAME "RSVG"

| #define PACKAGE_TARNAME "librsvg"

| #define PACKAGE_VERSION "2.42.2"

| #define PACKAGE_STRING "RSVG 2.42.2"

adding 'port:cargo' in the 'depends_lib'

after about 40 minutes of thrashing around, all dependencies are built but updating librsvg leads to

:info:destroot make: *** No rule to make target `install'.  Stop.

Is this is a relatively easy fix???