UNIX Related

• There is no stack space usage limit.
• Stack checking is simulated.
• Minimal operating system versions :

The GNU debugger v6.5 and later have been tested, and generally work as they should. Because the GNU debugger is C oriented, some pascal types might not be represented as they should.

Creating dynamic libraries under UNIX-like operating systems is supported.

Importing code from shared libraries does work as expected though, since it does not require usage of position independent code.

Profiling is supported using gprof under linux, FreeBSD and NetBSD, the latter two only since 1.0.8. On other other UNIX-like operating systems, profiling is currently not supported.

Libc is a Kylix compatibility unit. Because it contains many i386 specific code and features structures from legacy kernels, it has not been made available on other platforms.

To access UNIX functionality, please use units like baseunix and unix.

This error typically looks like this:

  Free Pascal Compiler version 3.0.x [xxxx/yy/zz] for i386
  Copyright (c) 1993-2008 by Florian Klaempfl
  Target OS: Linux for i386
  Compiling test.pp
  Assembling test
  Linking test
  /usr/bin/ld: cannot find -lvga
  test.pp(6,4) Warning: Error while linking Closing script ppas.sh 5 Lines
  compiled, 0.2 sec

This error is not an error in the installation of FPC or FPC itself, but a missing Svgalib library in your UNIX install. Please install the required library using your favorite package manager tool.

Normally UNIX systems have the assembler (as) and linker (ld) pre-installed and already in the search path. That is the reason why these tools are not supplied with the compiler.

If the compiler cannot find these tools, either they are not in your search path, or they are not installed. You should either add the path where the tools are located to your search path, and / or you should install these tools.

There was a bug in GNU LD 2.19 that caused it to crash when processing FPC-generated linker scripts. This bug has been fixed in GNU LD 2.19.1.

At the same time, LD has been modified to emit a warning of the form

/usr/bin/ld: warning: link.res contains output sections; did you forget -T?

FPC 3.1.1 and later by default generate a different kind of linker script that no longer triggers this warning. Unfortunately, this is only possible by making use of functionality that is unavailable before GNU LD 2.19. Earlier versions therefore now complain about a syntax error in link.res. The new -X9 compiler command line parameter can, however, be used to generate linker scripts that are compatible with pre-2.19 linker versions.

Their is no way to remove the -T warning with earlier FPC versions, but it should not result in any problems.