https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78386
--- Comment #9 from Gustavo Romero <gromero at linux dot vnet.ibm.com> --- Both -ffp-contract=off and -std=c11 (with -O3) do not damage the precision: CFLAGS=-I. -g -static -O3 -ffp-contract=off # Precision is OK CFLAGS=-I. -g -static -std=c11 -O3 # Precision is OK CFLAGS=-I. -g -static -std=c11 -ffp-contract=off -O3 # Precision is OK CFLAGS=-I. -g -static -O3 # Precision is NOT OK
