Cygwin build: b2 not working

[adritium]

These are my commands; b2 exist but doesn't do anything. Same thing happens when I checkout tag 1.81.0

user /cygdrive/c/work/misc/boost/boost-repo/boost
$ git pull
Already up to date.

user /cygdrive/c/work/misc/boost/boost-repo/boost
$ git submodule update --init --recursive

user /cygdrive/c/work/misc/boost/boost-repo/boost
$ git status -vv
On branch master
Your branch is up to date with 'origin/master'.

nothing to commit, working tree clean

user /cygdrive/c/work/misc/boost/boost-repo/boost
$ git clean -fdx
Removing b2.exe
Removing project-config.jam

user /cygdrive/c/work/misc/boost/boost-repo/boost
$ git reset --hard
HEAD is now at 27c16dbb69 Update multiprecision from master

user /cygdrive/c/work/misc/boost/boost-repo/boost
$ git clean -fdx

user /cygdrive/c/work/misc/boost/boost-repo/boost
$ ./bootstrap.sh
Building B2 engine..

###
###
### Using 'gcc' toolset.
###
###

g++ (GCC) 11.3.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


###
###

> g++ -x c++ -std=c++11 -D_GNU_SOURCE -O2 -s -DNDEBUG builtins.cpp class.cpp command.cpp compile.cpp constants.cpp cwd.cpp debug.cpp debugger.cpp execcmd.cpp execnt.cpp execunix.cpp filesys.cpp filent.cpp fileunix.cpp frames.cpp function.cpp glob.cpp hash.cpp hcache.cpp hdrmacro.cpp headers.cpp jam_strings.cpp jam.cpp jamgram.cpp lists.cpp make.cpp make1.cpp md5.cpp mem.cpp modules.cpp native.cpp object.cpp option.cpp output.cpp parse.cpp pathnt.cpp pathsys.cpp pathunix.cpp regexp.cpp rules.cpp scan.cpp search.cpp startup.cpp subst.cpp sysinfo.cpp timestamp.cpp variable.cpp w32_getreg.cpp modules/order.cpp modules/path.cpp modules/property-set.cpp modules/regex.cpp modules/sequence.cpp modules/set.cpp -o b2
tools/build/src/engine/b2
Detecting Python version... 3.9
Detecting Python root... /usr
Unicode/ICU support for Boost.Regex?... /usr
Generating B2 configuration in project-config.jam for gcc...

Bootstrapping is done. To build, run:

    ./b2

To generate header files, run:

    ./b2 headers

The configuration generated uses gcc to build by default. If that is
unintended either use the --with-toolset option or adjust configuration, by
editing 'project-config.jam'.

Further information:

   - Command line help:
     ./b2 --help

   - Getting started guide:
     http://www.boost.org/more/getting_started/unix-variants.html

   - B2 documentation:
     http://www.boost.org/build/


user /cygdrive/c/work/misc/boost/boost-repo/boost
$ ./b2 --help

user /cygdrive/c/work/misc/boost/boost-repo/boost
$ ls -la b2
-rwxrwxr-x+ 1 u114758 Domain Users 240128 Mar 26 09:21 b2


user /cygdrive/c/work/misc/boost/boost-repo/boost
$ where b2
C:\work\misc\boost\boost-repo\boost\b2.exe

user /cygdrive/c/work/misc/boost/boost-repo/boost
$ du -h b2
236K    b2

user /cygdrive/c/work/misc/boost/boost-repo/boost
$