I\'m under the impression my C compiler supports C11 since it accepts the -std=c11 flag,
$ cc --version
Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.
Try this:
cc -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk/usr/include -L/usr/lib -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk/usr/lib -licucore /tmp/esc.c
If it didn't work, I suggest that you install "International Components for Unicode":
1) Install Macports for OS X
2) Run this in Terminall app: "port install icu"
It gives you all needed components for Unicode, including "/opt/local/include/unicode/uchar.h"
Then find appropriate options for cc:
/opt/local/bin/icu-config --cppflags-searchpath --ldflags --ldflags-icuio
Which gives you:
-I/opt/local/include -L/opt/local/lib -licui18n -licuuc -licudata -licuio
So you compile your program as:
cc -I/opt/local/include -L/opt/local/lib -licui18n -licuuc -licudata -licuio /tmp/esc.c
I'm not sure, but probably getting icu from it's website might also work for you:
http://site.icu-project.org/download