Boost C++ Libraries: Ticket #13433: b2 emits strange error message when building 1.66.0 on windows 10 against very new visual studio

ivandavid14@… — Thu, 01 Feb 2018 03:14:44 GMT

So, I did more digging and found a file called execnt.c and modified the err_printf in prepare_command_file() to be this

err_printf("failed to write command file!\n %s\n %s\n", strerror(errno), cmdtab[ slot ].command_file->value);

and this was the output

failed to write command file! Permission denied C:\Users\divan\AppData\Local\Temp\jam2188-00-19.bat

I've ran b2 a couple of times with this and the last two digits are always 19. The contents of the bat file are always different. I change the permissions on my temp folder and that didn't fix anything.

component changed; owner set

Kohei Takahashi — Fri, 02 Feb 2018 00:59:41 GMT

owner set to Vladimir Prus
component None → build

ivandavid14@… — Fri, 02 Feb 2018 18:30:56 GMT

Hello, after modified the execnt.c a bit more

err_printf("failed to write command file!\n %u\n %s\n",GetLastError(), cmdtab[ slot ].command_file->value);

The result of the GetLastError() was 32 which is ERROR_SHARING_VIOLATION, which has the description "The process cannot access the file because it is being used by another process."

I found that antimalware software (such as windows defender) can cause fopen to do fail. I observed that small cpp files are usually what cause the problem (like a lot of the math ones). My assumption is that they compile very quickly so the time between create a bat file, running it, then going on to the next one is very small. This creates a lot of bat files in a short amount of time, potentially triggering the antimalware software to lock the file or something like that.

I modified my command line by removing '-a' from the b2 call and I wrote a script to just keep trying to build boost and just continue from where it left off. Sorry for the rather unsatisfactory answer and I hope I didn't waste your guys time.