# QMake Pro 文件说明

## 1.宏/变量

* DEFINES：qmake adds the values of this variable as compiler C preprocessor macros (-D option).
* DEPENDPATH：Specifies a list of directories for qmake to scan, to resolve dependencies.
* HEADERS：Defines the header files for the project.
* INCLUDEPATH：Specifies the #include directories which should be searched when compiling the project.
* LIBS：Specifies a list of libraries to be linked into the project.
* OUT_PWD：Specifies the full path leading to the directory where qmake places the generated Makefile.
* PWD：Specifies the full path leading to the directory containing the current file being parsed.
* QMAKE_RPATHDIR(Unix only)：Specifies a list of library paths that are added to the executable at link time so that the paths will be preferentially searched at runtime.
* QT：Specifies the Qt modules that are used by your project.
* SOURCES：Specifies the names of all source files in the project.
* TARGET：Specifies the name of the target file. Contains the base name of the project file by default.
* TEMPLATE：Specifies the name of the template to use when generating the project.

## 2.条件语句

### 2.1.区分系统平台

```pro
win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../tlb/release/ -ltlb
else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../tlb/debug/ -ltlb
else:unix: LIBS += -L$$OUT_PWD/../tlb/ -ltlb
```

### 2.2.判断预定义宏

```pro
if(contains(DEFINES, MY_DEFINE)){
}
```