As the name suggests, a precompiled header file contains object code in a compiled form that is included before the header stop point.

正如其名称所表示的，预编译头文件在头中止(header stop)点之前，以一种经过编译的形式包含目标代码。

youdao

The make utility checks the modification dates of files—header files, source code, data files, and object files—and builds the C source files that are appropriate.

make 实用工具检查文件（头文件、源代码、数据文件和目标文件）的修改日期，并编译合适的 C 源文件。

youdao