Build the objective-C compiling environment under longcore 8089d-debian7

Build the objective-C compiling environment directory under the dragon core 8089d-debian7

• Install Related Files
• Compilation parameter description
• Simplify command line parameters
• Actual compilation instance

Simple Description: Objective-C'sCFile suffix.mThe header file suffix is.hFor example, the routine in this tutorial ismain.m.

Install Related Files

Install these packages:gcc,g++,gobjc,gnustep,gnustep-devel,gnustep-gui-dev,libgnustep-base-dev.

The installation command is simple:

apt-get install gcc g++ gobjc gnustep gnustep-devel gnustep-gui-dev libgnustep-base-dev

After installation, you can proceed to the next step.

Compilation parameter description

For different releasesLinuxCompileObjective-CThe command parameters are slightly different inDebianThe following parameters are required:

`gnustep-config --objc-flags`-fconstant-string-class=NSConstantString-lobjc-lgnustep-base

In addition, you must specify the location of the header file (include file) and library file (LIB file ).DebianAnd their positions are/usr/include/GNUstep/And/usr/lib/GNUstep/The parameters are as follows:

-I /usr/include/GNUstep/-L /usr/lib/GNUstep/

The compilation command that combines the above parameters is as follows:

gcc `gnustep-config --objc-flags` -fconstant-string-class=NSConstantString -lobjc -lgnustep-base -I /usr/include/GNUstep/ -L /usr/lib/GNUstep/ -o main main.m

However, every time you input so many parameters, it is a little complicated. Next we will create an alias for this long string of commands.alias

Simplify command line parameters

The command to create an alias is as follows:

alias objcc=‘gcc `gnustep-config --objc-flags` -fconstant-string-class=NSConstantString -lobjc -lgnustep-base -I /usr/include/GNUstep/ -L /usr/lib/GNUstep/‘

To save this command to the System~/.bashrcFile. Copy this command.bashrcAnd then execute:

source ~/.bashrc

Compile laterObjective-CThe file can use an alias.objccIt's easy:

objcc -o main main.m

Note: In this alias commandSingle quotes: ''AndReverse quotation marks: ''Do not confuse.

Actual compilation instance

Finally, it is based on an actualObjective-CProgram example to illustrate, below is our routinemain.mContent:

#import <Foundation/Foundation.h>int main(int argc,const char * argv[]){    NSLog(@"hello world!");    return(0);}

Save the above Codemain.mAnd then execute:

objcc -o main main.m

The current directory will generatemain.

It must be noted that the executable file can only beDebianIf you wantDebianThe following part can be translated inOSXSome additional cross-compilation parameters are required for the executable file to run.