[uclibc-ng-devel] Comatibility with older Linux kernel (2.6.33.7)

I have an ARM9 platform that's running a pretty old Linux kernel (2.6.33.7 built with GCC 4.6.3). It's currently using a buildroot user-space built with that same compiler and uClibc 0.9.30. Moving to a newer kernel is not an option because of performance issues. Using a significantly newer version of GCC to build the kernel would also require more than a little kernel hacking. So I probably have to stick with the existing kernel build. For various reasons, updating to recent versions of a few user-space packages might be required. Are there likely to be compatibility problems building/running a user-space (e.g. with buildroot) using a recent toolchain (gcc 12.3, uClib-ng 1.0.45) for user-space and a kernel that old? -- Grant