Running your compiled application

After a program is compiled and linked, you can run the generated executable file on the command line.

The default file name for the program executable file produced by the IBM® Open XL C/C++ compiler is a.out. You can select a different name with the -o compiler option.

Avoid giving your program executable file the same name as system or shell commands, such as test or cp, as you could accidentally execute the wrong command. If you do decide to name your program executable file with the same name as a system or shell command, execute your program by specifying the path name to the directory in which your executable file resides, such as ./test.

To run a program, enter the name of the program executable file with runtime arguments on the command line.

Canceling execution

To suspend a running program, press Ctrl+Z while the program is in the foreground. Use the fg command to resume running.

To cancel a running program, press Ctrl+C while the program is in the foreground.

Setting runtime options

You can use environment variable settings to control certain runtime options and behaviors of applications created with the IBM Open XL C/C++ compiler. Some environment variables do not control actual runtime behavior, but they can have an impact on how your applications run.

For more information about environment variables and how they can affect your applications at run time, see the IBM Open XL C/C++ Installation Guide.

Running compiled applications on other systems

In general, applications linked on a system using an earlier version of AIX® can run with more recent versions of AIX. However, applications linked on a system using a newer version of AIX might not necessarily run with earlier versions of AIX.

If you want to run an application developed with the IBM Open XL C/C++ compiler on another system that does not install the compiler, you need to install a runtime environment on that system or link your application statically.

You can obtain the latest IBM Open XL C/C++ Runtime Environment images, together with licensing and usage information, from the Open XL C/C++ for AIX support page.

`libc++` load compatibility

When you run an application, load it against the libc++.a, libc++abi.a, libunwind.a runtime filesets at the same or a higher level than those that the application was linked against. Otherwise, if the application is loaded against an older version of these filesets, some objects or symbols might not be found and an error message similar to the following one will be issued:

exec(): 0509-036 Cannot load program ${PROGRAM_NAME} because of the following errors:
	0509-130 Symbol resolution failed for ${PROGRAM_NAME} because:
	0509-136   Symbol _ZNSt3__122__libcpp_verbose_abortEPKcz (${NUMBER}) is not exported from
		   dependent module ${RUNTIME_LOCATION}/libc++.a(shr.o).