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+# 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)){
+}
+```