[package] boost/1.72.0: not compile on Windows with shared and python options.

[mherok]

Package and Environment Details (include every applicable attribute)

• Package Name/Version: boost/1.72.0
• Operating System+version: Windows 10
• Compiler+version: MSVC++ v15.9.26
• Docker image: --
• Conan version: conan 1.29.0
• Python version: Python 3.8.5

Conan profile (output of conan profile show default or conan profile show <profile> if custom profile is in use)

[settings]
os=Windows
os_build=Windows
arch=x86
arch_build=x86
compiler=Visual Studio
compiler.version=15
build_type=Debug
[options]
[build_requires]
[env]

Steps to reproduce (Include if Applicable)

conanfile.txt:

[requires]
boost/1.72.0

[options]
*:python=True
*:fPIC=True
*:without_python=False
boost:shared=True
poco:shared=True
sqlite3:shared=True

[generators]
cmake_find_package
cmake_paths

conan install conanfile.txt -s build_type=Debug --build=missing

Logs (Include/Attach if Applicable)

Click to expand log

msvc.link.dll c:\.conan\d32830e\1\boost\bin.v2\libs\python\build\msvc-14.0\dbg\pythn-3.8\thrd-mlt\boost_python38.dll

LINK : fatal error LNK1181: cannot open input file 'python38.lib'



        call "c:\.conan\d32830e\1\boost\bin.v2\standalone\msvc\msvc-14.0\msvc-setup.bat" x86 >nul

 link /NOLOGO /INCREMENTAL:NO /DLL /DEBUG /MACHINE:X86 /MANIFEST /subsystem:console /out:"c:\.conan\d32830e\1\boost\bin.v2\libs\python\build\msvc-14.0\dbg\pythn-3.8\thrd-mlt\boost_python38.dll" /IMPLIB:"c:\.conan\d32830e\1\boost\bin.v2\libs\python\build\msvc-14.0\dbg\pythn-3.8\thrd-mlt\boost_python38.lib" /LIBPATH:"c:\python\libs\python38.lib"   @"c:\.conan\d32830e\1\boost\bin.v2\libs\python\build\msvc-14.0\dbg\pythn-3.8\thrd-mlt\boost_python38.dll.rsp"

        if %ERRORLEVEL% NEQ 0 EXIT %ERRORLEVEL%

    

...failed msvc.link.dll c:\.conan\d32830e\1\boost\bin.v2\libs\python\build\msvc-14.0\dbg\pythn-3.8\thrd-mlt\boost_python38.dll c:\.conan\d32830e\1\boost\bin.v2\libs\python\build\msvc-14.0\dbg\pythn-3.8\thrd-mlt\boost_python38.lib c:\.conan\d32830e\1\boost\bin.v2\libs\python\build\msvc-14.0\dbg\pythn-3.8\thrd-mlt\boost_python38.pdb...

...skipped <pc:\.conan\be9e3b4\1\lib>boost_python38.dll for lack of <pc:\.conan\d32830e\1\boost\bin.v2\libs\python\build\msvc-14.0\dbg\pythn-3.8\thrd-mlt>boost_python38.dll...

...skipped <pc:\.conan\be9e3b4\1\lib>boost_python38.lib for lack of <pc:\.conan\d32830e\1\boost\bin.v2\libs\python\build\msvc-14.0\dbg\pythn-3.8\thrd-mlt>boost_python38.lib...

...skipped <pc:\.conan\d32830e\1\boost\bin.v2\libs\python\build\msvc-14.0\dbg\pythn-3.8\thrd-mlt>libboost_python-variant-shared-py3.8.cmake for lack of <pc:\.conan\d32830e\1\boost\bin.v2\libs\python\build\msvc-14.0\dbg\pythn-3.8\thrd-mlt>boost_python38.lib...

The path to python38.lib is correct but linker does not see it. Everything works after changing LIBPATH to "c:\python\libs". I do this by changing line 343 from:
return python_lib.replace('\\', '/')
to:
return libdir.replace('\\', '/')