[Question] Is the version<...>::value an int or unsigned int? i have link problems with gcc but not with MSVC

[LowLevelMahn]

i've got an tiny example (its a cut-out, reduced, self-contained test from part of an ongoing Windows/MSVC-->Linux/gcc porting project) - using Boost 1.84

https://github.com/LowLevelMahn/linux_link_error
build-intructions for windows/linux: https://github.com/LowLevelMahn/linux_link_error/blob/main/build.txt

that links with MSVC but not with gcc

it links on linux if i change the following line from unsigned int to int

https://github.com/LowLevelMahn/linux_link_error/blob/9961ddb30cbbb927989df0fecb02b27c30ac45d2/linux_link_error_lib/serialize_MyType.hpp#L15

questions:

its unclear to me why it works with MSVC but not with gcc/ld/lld/mold linker
but i see differences in some signatures, the BOOST_CLASS_VERSION macro, for example, im not using it, is using int for the version::value - most examples using the macro BOOST_STATIC_CONSTANT with unsigned int - isn't that incorrect and it should be at all places int or unsigned int but not mixed? also the save and load functions using unsigned int for the version but it seems that the value "should" be or is int inside - im a little confused here

any idea why the code links without problems on windows/MSVC?

my system:

Windows 10/MSVC 2022 latest

Linux:
recent Tumbleweed SUSE
gcc 13.2.1
clang 18.1.1
ld: 2.42.0
lld: 18.1.1
mold: 2.30.0

my boost build:

my boost build: from source on linux and windows
wget
https://boostorg.jfrog.io/artifactory/main/release/1.84.0/source/boost_1_84_0.tar.bz2
tar -xf boost_1_84_0.tar.bz2
cd boost_1_84_0
./bootstrap.sh --prefix=/home/testing/boost_1_84_0_install
./b2 install

[LowLevelMahn]

any ideas on that?

[robertramey]

sorry I haven't found time to look into this. It's not uninteresting to me. Feel free to remind me again if I don't get on it soon enough.