Can't compile on many non-x86 architectures

[Michael R. Crusoe]

Hello,

rhdf5filters was recently packaged for Debian as https://tracker.debian.org/pkg/r-bioc-rhdf5filters

We were unable to compile on many non-x86 architectures as they seem to lack the gcc __builtin_cpu_init function which is required by tools/ax_gcc_x86_cpu_supports.m4 to test for SSE2 support.

As a workaround we are passing --configure-args="ax_cv_gcc_check_x86_cpu_init=yes ax_cv_gcc_x86_cpu_supports_sse2=no" to `R CMD INSTALL on non x86-64 architectures.

Perhaps this could be fixed so that non-Debian users won't have this issue.