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### C.10 Unit loading messages.

This section lists all messages that can occur when the compiler is loading a unit from disk into memory. Many of these messages are informational messages.

Unitsearch: arg1
  When you use the -vt option, the compiler tells you where it tries to find unit files.
PPU Loading arg1
  When the -vt switch is used, the compiler tells you what units it loads.
PPU Name: arg1
  When you use the -vu flag, the unit name is shown.
PPU Flags: arg1
  When you use the -vu flag, the unit flags are shown.
PPU Crc: arg1
  When you use the -vu flag, the unit CRC check is shown.
PPU Time: arg1
  When you use the -vu flag, the time the unit was compiled is shown.
PPU File too short
  The ppufile is too short, not all declarations are present.
PPU Invalid Header (no PPU at the begin)
  A unit file contains as the first three bytes the ASCII codes of the characters PPU.
PPU Invalid Version arg1
  This unit file was compiled with a different version of the compiler, and cannot be read.
PPU is compiled for another processor
  This unit file was compiled for a different processor type, and cannot be read.
PPU is compiled for another target
  This unit file was compiled for a different target, and cannot be read.
PPU Source: arg1
  When you use the -vu flag, the unit source file name is shown.
Writing arg1
  When you specify the -vu switch, the compiler will tell you where it writes the unit file.
Fatal: Can’t Write PPU-File
  An error occurred when writing the unit file.
Fatal: Error reading PPU-File
  This means that the unit file was corrupted, and contains invalid information. Recompilation will be necessary.
Fatal: unexpected end of PPU-File
  Unexpected end of file. This may mean that the PPU file is corrupted.
Fatal: Invalid PPU-File entry: arg1
  The unit the compiler is trying to read is corrupted, or generated with a newer version of the compiler.
Fatal: PPU Dbx count problem
  There is an inconsistency in the debugging information of the unit.
Error: Illegal unit name: arg1
  The name of the unit does not match the file name.
Fatal: Too much units
  Free Pascal has a limit of 1024 units in a program. You can change this behavior by changing the maxunits constant in the fmodule.pas file of the compiler, and recompiling the compiler.
Fatal: Circular unit reference between arg1 and arg2
  Two units are using each other in the interface part. This is only allowed in the implementation part. At least one unit must contain the other one in the implementation section.
Fatal: Can’t compile unit arg1, no sources available
  A unit was found that needs to be recompiled, but no sources are available.
Fatal: Can’t find unit arg1 used by arg2
  You tried to use a unit of which the PPU file isn’t found by the compiler. Check your configuration file for the unit paths.
Warning: Unit arg1 was not found but arg2 exists
  This error message is no longer used.
Fatal: Unit arg1 searched but arg2 found
  dos truncation of 8 letters for unit PPU files may lead to problems when unit name is longer than 8 letters.
Warning: Compiling the system unit requires the -Us switch
  When recompiling the system unit (it needs special treatment), the -Us switch must be specified.
Fatal: There were arg1 errors compiling module, stopping
  When the compiler encounters a fatal error or too many errors in a module then it stops with this message.
Load from arg1 (arg2) unit arg3
  When you use the -vu flag, which unit is loaded from which unit is shown.
Recompiling arg1, checksum changed for arg2
  The unit is recompiled because the checksum of a unit it depends on has changed.
Recompiling arg1, source found only
  When you use the -vu flag, these messages tell you why the current unit is recompiled.
Recompiling unit, static lib is older than ppufile
  When you use the -vu flag, the compiler warns if the static library of the unit is older than the unit file itself.
Recompiling unit, shared lib is older than ppufile
  When you use the -vu flag, the compiler warns if the shared library of the unit is older than the unit file itself.
Recompiling unit, obj and asm are older than ppufile
  When you use the -vu flag, the compiler warns if the assembler or object file of the unit is older than the unit file itself.
Recompiling unit, obj is older than asm
  When you use the -vu flag, the compiler warns if the assembler file of the unit is older than the object file of the unit.
Parsing interface of arg1
  When you use the -vu flag, the compiler warns that it starts parsing the interface part of the unit.
Parsing implementation of arg1
  When you use the -vu flag, the compiler warns that it starts parsing the implementation part of the unit.
Second load for unit arg1
  When you use the -vu flag, the compiler warns that it starts recompiling a unit for the second time. This can happen with interdependent units.
PPU Check file arg1 time arg2
  When you use the -vu flag, the compiler shows the filename and date and time of the file on which a recompile depends.
Warning: Can’t recompile unit arg1, but found modifed include files
  A unit was found to have modified include files, but some source files were not found, so recompilation is impossible.
File arg1 is newer than the one used for creating PPU file arg2
  A modified source file for a compiler unit was found.
Trying to use a unit which was compiled with a different FPU mode
  Trying to compile code while using units which were not compiled with the same floating point format mode. Either all code should be compiled with FPU emulation on, or with FPU emulation off.
Loading interface units from arg1
  When you use the -vu flag, the compiler warns that it is starting to load the units defined in the interface part of the unit.
Loading implementation units from arg1
  When you use the -vu flag, the compiler warns that it is starting to load the units defined in the implementation part of the unit.
Interface CRC changed for unit arg1
  When you use the -vu flag, the compiler warns that the CRC calculated for the interface has been changed after the implementation has been parsed.
Implementation CRC changed for unit arg1
  When you use the -vu flag, the compiler warns that the CRC calculated has been changed after the implementation has been parsed.
Finished compiling unit arg1
  When you use the -vu flag, the compiler warns that it has finished compiling the unit.
Adding dependency: arg1 depends on arg2
  When you use the -vu flag, the compiler warns that it has added a dependency between the two units.
No reload, is caller: arg1
  When you use the -vu flag, the compiler warns that it will not reload the unit because it is the unit that wants to load this unit.
No reload, already in second compile: arg1
  When you use the -vu flag, the compiler warns that it will not reload the unit because it is already in a second recompile.
Flag for reload: arg1
  When you use the -vu flag, the compiler warns that it has to reload the unit.
Forced reloading
  When you use the -vu flag, the compiler warns that it is reloading the unit because it was required.
Previous state of arg1: arg2
  When you use the -vu flag, the compiler shows the previous state of the unit.
Already compiling arg1, setting second compile
  When you use the -vu flag, the compiler warns that it is starting to recompile a unit for the second time. This can happen with interdependent units.
Loading unit arg1
  When you use the -vu flag, the compiler warns that it starts loading the unit.
Finished loading unit arg1
  When you use the -vu flag, the compiler warns that it finished loading the unit.
Registering new unit arg1
  When you use the -vu flag, the compiler warns that it has found a new unit and is registering it in the internal lists.
Re-resolving unit arg1
  When you use the -vu flag, the compiler warns that it has to recalculate the internal data of the unit.
Skipping re-resolving unit arg1, still loading used units
  When you use the -vu flag, the compiler warns that it is skipping the recalculation of the internal data of the unit because there is no data to recalculate.
Unloading resource unit arg1 (not needed)
  When you use the -vu flag, the compiler warns that it is unloading the resource handling unit, since no resources are used.
Error: Unit arg1 was compiled using a different whole program optimization feedback input (arg2, arg3); recompile it without wpo or use the same wpo feedback input file for this compilation invocation
  When a unit has been compiled using a particular whole program optimization (wpo) feedback file (-FW<x> -OW<x>), this compiled version of the unit is specialised for that particular compilation scenario and cannot be used in any other context. It has to be recompiled before you can use it in another program or with another wpo feedback input file.
Indirect interface (objects/classes) CRC changed for unit arg1
  When you use the -vu flag, the compiler warns that the indirect CRC calculated for the unit (this is the CRC of all classes/objects/interfaces/… in the interfaces of units directly or indirectly used by this unit in the interface) has been changed after the implementation has been parsed.

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