[question] b2 recipe needs to be rebuild every time before building boost recipe for Windows

[lapujain1991]

What is your question?

b2 recipe needs to be rebuild every time before building boost recipe and this problem occurred only for windows platform, macos, linux platforms works fine without the need to rebuild b2 every time. Attaching the log file and b2 conan file for reference which contains:

1. command to build boost
2. host/build profile
3. errors/exception

conanfile.zip

Error summary:

`don't know how to make pE:\gh\_work\conan-recipes\conan-recipes\.home\p\b\boosta0c21f8ce1bd9\b\build-release\boost\bin.v2\libs\container\build-install\boost_container-config.cmake-object(print-scanner)@137297print.jam

...skipped pE:\gh\_work\conan-recipes\conan-recipes\.home\p\b\boosta0c21f8ce1bd9\b\build-release\boost\bin.v2\libs\exception\buildinstall\boost_exception-config.cmake for lack of pE:\gh\_work\conan-recipes\conan-recipes\.home\p\b\boosta0c21f8ce1bd9\b\build-release\boost\bin.v2\libs\exception\build-install\boost_exception-config.cmake-object(print-scanner)@137297print.jam...

boost/1.82.0: ERROR:
Package '62c7b111f2e0465e3b1beea786865b374fbcf103' build failed
boost/1.82.0: WARN: Build folder E:\gh_work\conan-recipes\conan-recipes.home\p\b\boosta0c21f8ce1bd9\b\build-release
ERROR: boost/1.82.0: Error in build() method, line 1107
self.run(full_command)
ConanException: Error 1 while executing`

[jcar87]

Hi @lapujain1991 - thanks for raising this issue.

The boost recipe is set to reduce the verbosity of the build log, so there aren't really any details.

Could you please pass the debug_level option to boost (which affects the build log)
-o "boost/*:debug_level=5

I think something 4 or higher might work: https://www.boost.org/doc/libs/1_85_0/tools/build/doc/html/index.html

then it should show you which command in the build is failing, and with what errors

in the log you have uploaded, I can see that b2 is already in the cache - not seeing any errors related to b2 having to be built from source?

[lapujain1991]

b2 is building fine, without any errors. Here is the new log file with more debug_levels (-d2 d+4)

boost_log_file_high_debug_level.txt