首先说一下qt编程的步骤,然后再仔细说一下qmake的使用。我看书上的都是编写好cpp文件后,分别执行命令: qmake -project、qmake、make,然后执行就可以了,但是要是我在一个文件夹下有多个cpp文件,qmake怎么识别?make生成的最后执行文件的名,我怎么能随心所欲的自己定?带着疑问,找了网上的资料,不如所衣,然后尝试着gcc编译的思想竟然撞到了。
其实我感觉要要真正了解qmake的使用方法,直接在终端下输入命令:qmake -help就可以了,我也是这样做的,帮助内容如下
- Usage: qmake [mode] [options] [files]
- QMake has two modes, one mode for generating project files based on
- some heuristics, and the other for generating makefiles. Normally you
- shouldn't need to specify a mode, as makefile generation is the default
- mode for qmake, but you may use this to test qmake on an existing project
- Mode:
- -project Put qmake into project file generation mode
- In this mode qmake interprets files as files to
- be built,
- defaults to *.c; *.ui; *.y; *.l; *.ts; *.xlf; *.qrc; *.h; *.hpp; *.hh; *.hxx; *.H; *.cpp; *.cc; *.cxx; *.C
- Note: The created .pro file probably will
- need to be edited. For example add the QT variable to
- specify what modules are required.
- -makefile Put qmake into makefile generation mode (default)
- In this mode qmake interprets files as project files to
- be processed, if skipped qmake will try to find a project
- file in your current working directory
- Warnings Options:
- -Wnone Turn off all warnings; specific ones may be re-enabled by
- later -W options
- -Wall Turn on all warnings
- -Wparser Turn on parser warnings
- -Wlogic Turn on logic warnings (on by default)
- -Wdeprecated Turn on deprecation warnings (on by default)
- Options:
- * You can place any variable assignment in options and it will be *
- * processed as if it was in [files]. These assignments will be parsed *
- * before [files]. *
- -o file Write output to file
- -d Increase debug level
- -t templ Overrides TEMPLATE as templ
- -tp prefix Overrides TEMPLATE so that prefix is prefixed into the value
- -help This help
- -v Version information
- -after All variable assignments after this will be
- parsed after [files]
- -norecursive Don't do a recursive search
- -recursive Do a recursive search
- -set <prop> <value> Set persistent property
- -unset <prop> Unset persistent property
- -query <prop> Query persistent property. Show all if <prop> is empty.
- -cache file Use file as cache [makefile mode only]
- -spec spec Use spec as QMAKESPEC [makefile mode only]
- -nocache Don't use a cache file [makefile mode only]
- -nodepend Don't generate dependencies [makefile mode only]
- -nomoc Don't generate moc targets [makefile mode only]
- -nopwd Don't look for files in pwd [project mode only]
- song@ubuntu:~/lianxi/qt$ clear
- song@ubuntu:~/lianxi/qt$ qmake -help
- Usage: qmake [mode] [options] [files]
- QMake has two modes, one mode for generating project files based on
- some heuristics, and the other for generating makefiles. Normally you
- shouldn't need to specify a mode, as makefile generation is the default
- mode for qmake, but you may use this to test qmake on an existing project
- Mode:
- -project Put qmake into project file generation mode
- In this mode qmake interprets files as files to
- be built,
- defaults to *.c; *.ui; *.y; *.l; *.ts; *.xlf; *.qrc; *.h; *.hpp; *.hh; *.hxx; *.H; *.cpp; *.cc; *.cxx; *.C
- Note: The created .pro file probably will
- need to be edited. For example add the QT variable to
- specify what modules are required.
- -makefile Put qmake into makefile generation mode (default)
- In this mode qmake interprets files as project files to
- be processed, if skipped qmake will try to find a project
- file in your current working directory
- Warnings Options:
- -Wnone Turn off all warnings; specific ones may be re-enabled by
- later -W options
- -Wall Turn on all warnings
- -Wparser Turn on parser warnings
- -Wlogic Turn on logic warnings (on by default)
- -Wdeprecated Turn on deprecation warnings (on by default)
- Options:
- * You can place any variable assignment in options and it will be *
- * processed as if it was in [files]. These assignments will be parsed *
- * before [files]. *
- -o file Write output to file
- -d Increase debug level
- -t templ Overrides TEMPLATE as templ
- -tp prefix Overrides TEMPLATE so that prefix is prefixed into the value
- -help This help
- -v Version information
- -after All variable assignments after this will be
- parsed after [files]
- -norecursive Don't do a recursive search
- -recursive Do a recursive search
- -set <prop> <value> Set persistent property
- -unset <prop> Unset persistent property
- -query <prop> Query persistent property. Show all if <prop> is empty.
- -cache file Use file as cache [makefile mode only]
- -spec spec Use spec as QMAKESPEC [makefile mode only]
- -nocache Don't use a cache file [makefile mode only]
- -nodepend Don't generate dependencies [makefile mode only]
- -nomoc Don't generate moc targets [makefile mode only]
- -nopwd Don't look for files in pwd [project mode only]
Usage: qmake [mode] [options] [files] QMake has two modes, one mode for generating project files based on some heuristics, and the other for generating makefiles. Normally you shouldn't need to specify a mode, as makefile generation is the default mode for qmake, but you may use this to test qmake on an existing project Mode: -project Put qmake into project file generation mode In this mode qmake interprets files as files to be built, defaults to *.c; *.ui; *.y; *.l; *.ts; *.xlf; *.qrc; *.h; *.hpp; *.hh; *.hxx; *.H; *.cpp; *.cc; *.cxx; *.C Note: The created .pro file probably will need to be edited. For example add the QT variable to specify what modules are required. -makefile Put qmake into makefile generation mode (default) In this mode qmake interprets files as project files to be processed, if skipped qmake will try to find a project file in your current working directory Warnings Options: -Wnone Turn off all warnings; specific ones may be re-enabled by later -W options -Wall Turn on all warnings -Wparser Turn on parser warnings -Wlogic Turn on logic warnings (on by default) -Wdeprecated Turn on deprecation warnings (on by default) Options: * You can place any variable assignment in options and it will be * * processed as if it was in [files]. These assignments will be parsed * * before [files]. * -o file Write output to file -d Increase debug level -t templ Overrides TEMPLATE as templ -tp prefix Overrides TEMPLATE so that prefix is prefixed into the value -help This help -v Version information -after All variable assignments after this will be parsed after [files] -norecursive Don't do a recursive search -recursive Do a recursive search -set <prop> <value> Set persistent property -unset <prop> Unset persistent property -query <prop> Query persistent property. Show all if <prop> is empty. -cache file Use file as cache [makefile mode only] -spec spec Use spec as QMAKESPEC [makefile mode only] -nocache Don't use a cache file [makefile mode only] -nodepend Don't generate dependencies [makefile mode only] -nomoc Don't generate moc targets [makefile mode only] -nopwd Don't look for files in pwd [project mode only] song@ubuntu:~/lianxi/qt$ clear song@ubuntu:~/lianxi/qt$ qmake -help Usage: qmake [mode] [options] [files] QMake has two modes, one mode for generating project files based on some heuristics, and the other for generating makefiles. Normally you shouldn't need to specify a mode, as makefile generation is the default mode for qmake, but you may use this to test qmake on an existing project Mode: -project Put qmake into project file generation mode In this mode qmake interprets files as files to be built, defaults to *.c; *.ui; *.y; *.l; *.ts; *.xlf; *.qrc; *.h; *.hpp; *.hh; *.hxx; *.H; *.cpp; *.cc; *.cxx; *.C Note: The created .pro file probably will need to be edited. For example add the QT variable to specify what modules are required. -makefile Put qmake into makefile generation mode (default) In this mode qmake interprets files as project files to be processed, if skipped qmake will try to find a project file in your current working directory Warnings Options: -Wnone Turn off all warnings; specific ones may be re-enabled by later -W options -Wall Turn on all warnings -Wparser Turn on parser warnings -Wlogic Turn on logic warnings (on by default) -Wdeprecated Turn on deprecation warnings (on by default) Options: * You can place any variable assignment in options and it will be * * processed as if it was in [files]. These assignments will be parsed * * before [files]. * -o file Write output to file -d Increase debug level -t templ Overrides TEMPLATE as templ -tp prefix Overrides TEMPLATE so that prefix is prefixed into the value -help This help -v Version information -after All variable assignments after this will be parsed after [files] -norecursive Don't do a recursive search -recursive Do a recursive search -set <prop> <value> Set persistent property -unset <prop> Unset persistent property -query <prop> Query persistent property. Show all if <prop> is empty. -cache file Use file as cache [makefile mode only] -spec spec Use spec as QMAKESPEC [makefile mode only] -nocache Don't use a cache file [makefile mode only] -nodepend Don't generate dependencies [makefile mode only] -nomoc Don't generate moc targets [makefile mode only] -nopwd Don't look for files in pwd [project mode only]
qmake命令格式
qmake [mode] [options] [files]
mode选项
-project 生成.pro文件
-makefile 生成Makefile文件
options选项(这里介绍几个常用的,其它的自己去翻译上面,其实我也是刚学,用到的时候再学习哈)
-o file 输出文件名,比如qmake -project hello.cpp -o hello.pro,就会生成一个hello.pro文件,如果是qmake -project hello.cpp -o hello11.pro,就会生成一个hello11.pro文件
实验1
1、编写代码,命名为hello.cpp,如下
hello.cpp代码如下
- #include<qapplication.h>
- #include<qpushbutton.h>
- int main(int argc,char *argv[])
- {
- QApplication a(argc,argv);
- QPushButton hellobtn("Hello World!",0);
- hellobtn.resize(200,50);
- hellobtn.show();
- return a.exec();
- }
#include<qapplication.h> #include<qpushbutton.h> int main(int argc,char *argv[]) { QApplication a(argc,argv); QPushButton hellobtn("Hello World!",0); hellobtn.resize(200,50); hellobtn.show(); return a.exec(); }
2、qmake -project (用于创建.pro文件,将所有的文件编译成一个与平台无关的工程文件)
可见默认生成的文件名为 qt.pro
3、qmake (读取本身的Qt设置,生成与库一致的相应的Makefile)
4、make (根据生成的Makefile,将文件编译为二进制可执行程序)
可见生成了qt可执行程序
5、执行命令:./qt
实验2
本实验中并没有用到上面所讲的方式,而是直接使用了默认值,但是假设说该文件夹下有两个cpp文件,如下图
这时候再执行命令:qmake -project会怎么样呢?会出现下面的结果
有点意思,竟然不出错,但是你知道它生成的qt.pro是哪个cpp文件的吗?我不知道,加入这里我想对test.cpp操作,这时候就要按照上面的格式了。
1、qmake -project test.cpp -o test.pro
这时候生成了test.pro
2、qmake -makefile test.pro,这里生成test.pro的Makefile
3、make
4、执行命令 ./test