This file contains any messages produced by compilers while running configure, to aid debugging if configure makes a mistake. gcc -E gcc -o conftest -O conftest.c gcc -c -O conftest.c gcc -E gcc -E gcc -E gcc -c -O conftest.c gcc -c -O conftest.c gcc -c -O conftest.c gcc -c -O conftest.c gcc -c -O conftest.c gcc -c -O conftest.c gcc -c -O conftest.c gcc -o conftest -O conftest.c gcc -o conftest -O conftest.c gcc -o conftest -O conftest.c gcc -o conftest -O conftest.c