https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78808
--- Comment #12 from Steven Noonan <steven at uplinklabs dot net> --- Created attachment 42418 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42418&action=edit nbody_CPU_AOS compile error testcase preprocessed source Compile error case, preprocessed source. Compile with: $ gcc -O3 -march=native -ffast-math -std=gnu11 -fno-strict-aliasing -D_GNU_SOURCE -DLIBTIME_STATIC -DUSE_OPENMP -DHAVE_SIMD -DNO_CUDA -DUSE_LIBC11 -I../libc11/include -I../libtime/include -Wall -Wdeclaration-after-statement -Werror=implicit -Werror=undef -Wmissing-declarations -Wmissing-prototypes -Wno-declaration-after-statement -Wno-long-long -Wno-overlength-strings -Wno-unknown-pragmas -Wold-style-definition -Wstrict-prototypes -pthread -fopenmp -MMD -c -o nbody_CPU_AOS.o nbody_CPU_AOS-compile-error.i