GCC Runtime Library had been updated (2015/02/20):
ftp://ftp.netlabs.org/pub/libc/gcc4core-1_3_0.wpi
"Runtime libraries required for projects built with the GCC compiler by Innotek and Netlabs (a "runtime" is a set of low-level routines used by a compiler to invoke some of the behaviors of a runtime environment, by inserting calls to the runtime library into compiled executable binary).
The runtime is divided into two/multiple packages:
- The core contains the specific GCC compiler main libraries;
- Libraries containing the actual C language runtime functions and are divided by version/release(upgrade), i.e. "0.6.4-csd4" means "Fourth release of the C library, version 0.6.4" and usually reflect the corrisponding GCC compiler 3.x.x release.
This runtime is now considered indispensable, since required by most of the latest versions of almost all opensource programs for OS/2 developed using C/C++ language."
Source: eCSoft/2