Using the z/OS UNIX c89 utility to link-edit and create executable files

To link-edit a z/OS UNIX C/C++ application's object modules to produce an executable file, specify the c89 utility and pass it object modules (file.o z/OS UNIX files or //file.OBJ MVS™ data sets). The c89utility recognizes that these are object modules produced by previous C/C++ compilations and does not invoke the compiler for them.

To compile source files without link-editing them, use the c89 -c option to create object modules only. You can use the -o option with the command to specify the name and location of the executable file to be created.

For a complete description of all the c89 options, see z/OS UNIX System Services Command Reference.

To link-edit an XPLINK-compiled application object module to create the mymodx.out executable file in the current directory, specify:
```
c89 -o mymodx.out -Wl,xplink usersource.o
```
To link-edit an application object module to create the default executable file a.out in the working directory, specify:
```
c89 usersource.o
```
To link-edit an application object module to create the mymod.out executable file in the app/bin directory, relative to your working directory, specify:
```
c89 -o app/bin/mymod.out usersource.o
```
To link-edit several application object modules to create the mymod.out executable file in the app/bin directory, relative to your working directory, specify:
```
c89 -o app/bin/mymod.out usersrc.o ottrsrc.o "//PGM.OBJ(PW...APP)"
```
To link-edit an application object module to create the MYLOADMD executable member of the MVS APPROG.LIB data set for your user ID, specify:
```
c89 -o "//APPROG.LIB(MYLOADMD)" usersource.o
```
To compile and link-edit an application source file with several previously compiled object modules to create the executable file zinfo in the approg/lib subdirectory, relative to your working directory, specify:
```
c89 -o approg/lib/zinfo usersrc.c existobj.o
"//PGM.OBJ(PWAPP)"
```