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Invalid floating point operation.
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Invalid floating point operation. 5 months 2 weeks ago #18128

  • Greg
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Hello everyone,
I've noticed strange CT v8.21 behavior related to cross-build.

Test scenario:
New fresh installation of CT v8.21. Platform: VBoxVM with Win10 x64 CPU: Intel Core i5 2520M.
I used Typhon64 and prepared most simple aplication with a single form.
Compilation default target : x86_64-win64. Building process: No errors. Application execution: No errors.
Now I use CT Center: CrossBuild->FreePascal 64bits->FPC64 build cross element i386-win32.
The whole process ends with success.
Now I prepare new build mode for my application and set on "Target Platform" :
Target OS: Win32
Target CPU: i386
Compilation this target: No errors. Application execution: Errors as follows:
An unhandled exception occurred at $004A039E:
EZeroDivide: Floating point division by zero...


The same situation when I try to cross-compile other application to x86_64-linux64 and x86_64-linux32 too.
Cross compilation with Typhon64 on the same machine passthrough without errors but execution this binaries on Ubuntu 20.04 generates similar error releated to floating point operation :
An unhandled exception occurred at $0000000000465E57:
EInvalidOp: Invalid floating point operation
  $0000000000465E57


I checked with VBoxVM with Win7 x64. The same error.
Interestingly, cross-compilation using typhon32 was successful and the binaries run fine on the mentioned Ubuntu. Typhon64 cross-compilation to arm-linux and aarch64-linux seems fine too. Is there something wrong with fpc64/ppcrossx64.exe?

I don't know in which version this problem occurred, but in the old version CT v7.7 everything works fine.
I noticed that CrossEng subdirectory environment has changed to msys2. Maybe problem is related to this change?
I tried to search recent forum posts for similar errors and found this: 18122 The error looks familiar, but it may just be a coincidence.

Next case. On the same fresh installation of CT v8.21 i tried to rebuild toolchain for "win64 x86_64-win64 xxxx i386 win32 xxxx xxxx":

Warning: Spoiler!


next try:
Warning: Spoiler!


I'm counting on your help.

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Invalid floating point operation. 5 months 2 weeks ago #18130

  • Matis A.
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Sir
To build Toolchains for i386-win32 you must set:

 

Anything you build with new Cross engine MSYS2, Toolchains, GNU make, GNU GDB etc
for i386-win32 the
Tatget CPU is: i686
Target OS is  : w64-mingw32

Did you test your cross-build application to Latest Ubuntu versions?
PilotLogic Core Programmer
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Invalid floating point operation. 5 months 2 weeks ago #18131

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OK. I'll try it with w64-mingw32 as you suggest but my Host is x86_64 not i386 ...
More important is the case with cross-compilation to x86_64-linux64 from win64/typhon64 and use scenario described by me. Have I made a mistake somewhere if this scenario worked fine on CT v7.7?
I generated application binaries with Win64/Typhon64 cross-compilation to x86_64-linux64 and tested this bineries with Ubuntu 20.04LTS. "EInvalidOp: Invalid floating point operation" appear.
I know it's not the latest version of this linux distribution but it's still supported and I think the problem is not the Linux because a similar error occurred when I try cross-build simple application from x86_64-win64 to i386-win32 and similar error appear.
Can you test my scenario in your lab ?

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Last edit: by Greg.

Invalid floating point operation. 5 months 2 weeks ago #18132

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You can't cross build from x86_64-win64 to i386-win32.
It's MS Windows problem...
Please search to our forum.
 
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Invalid floating point operation. 5 months 2 weeks ago #18133

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That's right, I can't. I can't with CT 8.21. But I just checked again with CT 7.7 and I can. i386-win32 application (Target OS: win32, Target CPU family: i386 ) generated by typhon64 on win64 works fine as 32-bit application.
Let's leave that case with i386-win32 ... What about described cross-compilation from typhon64 x86_64-win64 to x86_64-linux64 and executing application on linux64? Can you check it?

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Invalid floating point operation. 5 months 2 weeks ago #18134

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Yes we will test this.
Please, give us time, we have a lot open tasks in our LAB....
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Invalid floating point operation. 5 months 2 weeks ago #18135

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Thank you.
The most important thing is to detect and fix the problem. I just checked the changes log file and noticed the entry:
======> 31-May-2022 ver 7.80 ========================================
...............
   -COSMIC 3: New CrossBuld Engine for Ms Windows, based to msys2 64Bits.
Perhaps my described problems are related to these changes...
I will try to install CT7.8 and see if this version has lost the ability to properly cross compile like in version 7.7. Later, I may try next versions of CT to find out when the problem was appear.

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Invalid floating point operation. 5 months 2 weeks ago #18136

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I checked CT 7.8, CT 8.0, CT8.1 and the problem I described before did not occur :
Cross-build from Win64/Typhon64 to i386_win32: No errors. Application execution: No errors.
Cross-build from Win64/Typhon64 to x86_64_linux64: No errors. Application execution: No errors.
It seems that only the latest version CT 8.21 is affected.

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Invalid floating point operation. 5 months 2 weeks ago #18137

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Can you try and LAB CT 8.30 ?
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Invalid floating point operation. 5 months 2 weeks ago #18138

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Unfortunately, using LAB CT 8.30 causes the same errors as CT 8.21. The last version that works properly seems to be version 8.1.

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Invalid floating point operation.