Contents | |
About This Document................................................................................... | 13 |
Intended Audience.................................................................................................................. | 13 |
Document conventions and symbols.......................................................................................... | 13 |
Related Information................................................................................................................. | 13 |
HP Encourages Your Comments................................................................................................ | 14 |
Document Organization.......................................................................................................... | 14 |
1 Compiling and Linking Programs on HP-UX.................................................. | 16 |
Compiling Programs on HP-UX: An Example.............................................................................. | 16 |
Overview.......................................................................................................................... | 16 |
Looking Inside a Compiler................................................................................................... | 18 |
What is an Object File?................................................................................................. | 18 |
Local Definitions....................................................................................................... | 19 |
Global Definitions.................................................................................................... | 19 |
External References................................................................................................... | 19 |
Compiler-Linker Interaction.................................................................................................. | 19 |
Linking Programs on HP-UX...................................................................................................... | 21 |
The crt0.o Startup File........................................................................................................ | 21 |
The Program's Entry Point............................................................................................... | 22 |
The a.out File.................................................................................................................... | 22 |
Magic Numbers (PA-RISC ONLY)......................................................................................... | 22 |
File Permissions.................................................................................................................. | 23 |
Linking with Libraries............................................................................................................... | 23 |
Library Naming Conventions............................................................................................... | 24 |
Default Libraries................................................................................................................. | 24 |
The Default Library Search Path....................................................................................... | 24 |
Link Order........................................................................................................................ | 24 |
Running the Program............................................................................................................... | 25 |
Loading Programs: exec...................................................................................................... | 25 |
Binding Routines to a Program............................................................................................. | 25 |
Deferred Binding is the Default............................................................................................ | 25 |
Linker Thread-Safe Features...................................................................................................... | 26 |
Shared library loading and unloading in multi-threaded applications....................................... | 26 |
2 Determining How to Link Programs or Libraries (Linker Tasks).......................... | 27 |
Using the Compiler to Link....................................................................................................... | 28 |
Changing the Default Library Search Path with -Wl,-L............................................................. | 28 |
Example Using -Wl,-L.................................................................................................... | 28 |
Getting Verbose Output with -v............................................................................................ | 29 |
Passing Linker Options from the Compiler Command with -Wl.................................................. | 29 |
Example Using -Wl........................................................................................................ | 29 |
Renaming the Output File with -o.......................................................................................... | 29 |
Specifying Libraries with -l................................................................................................... | 29 |
Linking with the crt0.o Startup File in 32-bit mode (PA-RISC)................................................ | 30 |
Suppressing the Link-Edit Phase with -c.................................................................................. | 30 |
Using Linker Commands.......................................................................................................... | 30 |
Linking with the crt0.o Startup File........................................................................................ | 30 |
Changing the Default Library Search Path with -L, LPATH, and $ORIGIN.................................... | 30 |
Overriding the Default Linker Search Path with LPATH......................................................... | 30 |
Augmenting the Default Linker Search Path with -L.............................................................. | 31 |
Augmenting the Default Linker Search Path with +origin...................................................... | 31 |
Using $ORIGIN................................................................................................................. | 31 |
