[package] freeglut/*: mesa-glu and glu/system conflict

[AndreaFinazzi]

Description

After the changes in #22428 there's a possible conflict between freeglut and other GL libraries depending on glu/system (glew/2.2.0 and pcl/1.13.1 with opengl for instance). When trying to use both packages in the same tree, Conan complains showing this error:

ERROR: At least two recipes provide the same functionality:
 - 'glu' provided by 'mesa-glu/9.0.3', 'glu/system'

PCL explicitly uses freeglut and glu/system together:
https://github.com/conan-io/conan-center-index/blob/master/recipes/pcl/all/conanfile.py#L378-L383

Package and Environment Details

• Package Name/Version:
  • freeglut/3.4.0
  • pcl/1.13.1
  • glew/2.2.0
• Operating System+version: Linux Ubuntu 22.04
• Conan version: conan 1.61.0
• Python version: Python 3.10.12

Conan profile

[settings]
os=Linux
os_build=Linux
arch=x86_64
arch_build=x86_64
compiler=gcc
compiler.version=11
compiler.libcxx=libstdc++11
build_type=Release
[options]
[build_requires]
cmake/3.27.1
doxygen/1.9.4
[env]

Steps to reproduce

conan install -r conancenter pcl/1.13.1@ -o pcl:visualization=True

Logs

Click to expand log

$ conan install -r conancenter pcl/1.13.1@ -o pcl:visualization=True
Conan 1 is on a deprecation path, please consider migrating to Conan 2
Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++
compiler.version=11
os=Linux
os_build=Linux
[options]
pcl:visualization=True
[build_requires]
[env]

pcl/1.13.1: Retrieving from server 'conancenter' 
pcl/1.13.1: Trying with 'conancenter'...
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pcl/1.13.1: Downloaded recipe revision 0
boost/1.83.0: Retrieving from server 'conancenter' 
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boost/1.83.0: Downloaded recipe revision 0
WARN: boost/1.83.0: requirement zlib/[>=1.2.11 <2] overridden by pcl/1.13.1 to zlib/1.3.1 
zlib/1.3.1: Retrieving from server 'conancenter' 
zlib/1.3.1: Trying with 'conancenter'...
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zlib/1.3.1: Downloaded recipe revision 0
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bzip2/1.0.8: Downloaded recipe revision 0
libbacktrace/cci.20210118: Retrieving from server 'conancenter' 
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libbacktrace/cci.20210118: Downloaded recipe revision 0
eigen/3.4.0: Retrieving from server 'conancenter' 
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eigen/3.4.0: Downloaded recipe revision 0
flann/1.9.2: Retrieving from server 'conancenter' 
flann/1.9.2: Trying with 'conancenter'...
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flann/1.9.2: Downloaded recipe revision 0
lz4/1.9.4: Retrieving from server 'conancenter' 
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lz4/1.9.4: Downloaded recipe revision 0
libpng/1.6.40: Retrieving from server 'conancenter' 
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libpng/1.6.40: Downloaded recipe revision 0
WARN: libpng/1.6.40: requirement zlib/[>=1.2.11 <2] overridden by pcl/1.13.1 to zlib/1.3.1 
qhull/8.0.1: Retrieving from server 'conancenter' 
qhull/8.0.1: Trying with 'conancenter'...
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qhull/8.0.1: Downloaded recipe revision 0
libusb/1.0.26: Retrieving from server 'conancenter' 
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libusb/1.0.26: Downloaded recipe revision 0
libudev/system: Retrieving from server 'conancenter' 
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libudev/system: Downloaded recipe revision 0
libpcap/1.10.4: Retrieving from server 'conancenter' 
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opengl/system: Downloaded recipe revision 0
freeglut/3.4.0: Retrieving from server 'conancenter' 
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freeglut/3.4.0: Downloaded recipe revision 0
mesa-glu/9.0.3: Retrieving from server 'conancenter' 
mesa-glu/9.0.3: Trying with 'conancenter'...
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mesa-glu/9.0.3: Downloaded recipe revision 0
libglvnd/1.7.0: Retrieving from server 'conancenter' 
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libglvnd/1.7.0: Downloaded recipe revision 0
xorg/system: Retrieving from server 'conancenter' 
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xorg/system: Downloaded recipe revision 0
xorg-proto/2022.2: Retrieving from server 'conancenter' 
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xorg-proto/2022.2: Downloaded recipe revision 0
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wayland/1.22.0: Downloaded recipe revision 0
libffi/3.4.4: Retrieving from server 'conancenter' 
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libffi/3.4.4: Downloaded recipe revision 0
libxml2/2.12.3: Retrieving from server 'conancenter' 
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libxml2/2.12.3: Downloaded recipe revision 0
WARN: libxml2/2.12.3: requirement zlib/[>=1.2.11 <2] overridden by wayland/1.22.0 to zlib/1.3.1 
libiconv/1.17: Retrieving from server 'conancenter' 
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expat/2.6.0: Downloaded recipe revision 0
xkbcommon/1.6.0: Retrieving from server 'conancenter' 
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glu/system: Downloaded recipe revision 0
Version ranges solved
    zlib/* versions found in 'conancenter' remote
    Version range '>=1.2.11 <2' required by 'pcl/1.13.1' resolved to 'zlib/1.3.1' in remote 'conancenter'
    Version range '>=1.2.11 <2' required by 'boost/1.83.0' valid for downstream requirement 'zlib/1.3.1'
    Version range '>=1.2.11 <2' required by 'libpng/1.6.40' valid for downstream requirement 'zlib/1.3.1'
    Version range '>=1.2.11 <2' required by 'libxml2/2.12.3' valid for downstream requirement 'zlib/1.3.1'

ERROR: At least two recipes provides the same functionality:
 - 'glu' provided by 'mesa-glu/9.0.3', 'glu/system'

[jwillikers]

Yeah, we'll need to start updating the recipes to use mesa-glu everywhere except macOS and Windows.

[jwillikers]

Alright, #22956, #22957, and #22958 should fix this conflict for all of the modern Conan packages in CCI. Thanks for reporting!

[AndreaFinazzi]

Thank you for the prompt action!