[zlib] zlib/1.2.12: Compilation with Clang on Windows produces the wrong library name (z.lib instead of zlib.lib)

Description

To elaborate on the title:

• When building zlib on Windows with MSVC, the produced library is named zlib.lib, as intended by all generators which try to locate a file with basename zlib.

• If zlib is built with Conan 15 on Windows, the produced library is names z.lib instead, which breaks downstreams because they expect zlib basename.

Package and Environment Details

• Package Name/Version: libpng/1.6.38
• Operating System+version: Windows 10
• Compiler+version: Clang 15 (scoop install llvm)
• Conan version: conan 1.53.0

Conan profile

[settings] arch=x86_64 arch_build=x86_64 build_type=Debug compiler=clang compiler.cppstd=20 compiler.version=15 os=Windows os_build=Windows [options] [build_requires] *: cmake/3.24.1 [env] CONAN_CMAKE_GENERATOR=Unix Makefiles [conf] tools.cmake.cmaketoolchain:generator=Unix Makefiles

Steps to reproduce

Build zlib:

conan install -pr:h clang15-win-dev -pr:b build/Windows zlib/1.2.12@

Then locate the build package in the filesystem, and take a look under lib/ folder. It will contain z.lib for Clang builds, and zlib.lib for MSVC builds.

Logs

Click to expand log

It is more of filename issue than a log error per se.

[SpaceIm]

Here is a proposal: https://github.com/conan-io/conan-center-index/pull/13597

[SpaceIm]

I’ve opened https://github.com/conan-io/conan/issues/12336. I believe that we can’t do anything robust currently without such method.