set -e gcc_output=$(gcc -E -dM -x c /dev/null | grep -e __LONG_DOUBLE_IEEE128__ -e __LONG_DOUBLE_IBM128__) clang_output=$(clang -E -dM -x c /dev/null | grep -e __LONG_DOUBLE_IEEE128__ -e __LONG_DOUBLE_IBM128__) echo "gcc: $gcc_output" echo "clang: $clang_output" test "$gcc_output" = "$clang_output"