My main development configuration for fpspreadsheet has been Laz trunk /
fpc 2.6.4, but I am also using Laz trunk / fpc trunk intermittently;
fpspreadsheet is in a shared folder accessible to both installations.
For some time now I am experiencing compilation problems when going from
fpc trunk back to fpc 2.6.4. The laz_fpspreadsheet and
laz_fpspreadsheet_visual packages alone compile fine without any issues,
but when I rebuild the IDE and this process enters compilation of
lazarus.exe there occurs an error in one of the fpspreadsheet files saying
"fpsregfileformats.pas(20,32) Fatal: Cannot find fpsReaderWriter used by
fpsRegFileFormats, incompatible
ppu=D:\Prog_Lazarus\svn\lazarus-ccr\components\fpspreadsheet\lib\i386-win32\fpsreaderwriter.ppu,
package laz_fpspreadsheet"
I know this message from circular unit references, and the first time I
saw it I could fix it by restructuring the unit dependencies. At least I
thought so, because next time the error came back. Now I am removing
both packages, adding them again, deleting unit directories, doing clean
builds, recompile both packages in different order, etc - in rather
blind fashion because I don't know what is happening. After some time
suddenly the compilation passes correctly and everything is working fine
again.
Could anybody give me a hint what is going wrong here? Is it really
circular unit referencing? And: Is anybody else seeing these issues?
Maybe it's just due to my sharing of the same package source folder with
two compiler installations.
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