[SDL2] <sdl_ttf, sdl_image>/<>: Version discrepancy

[rdbruce]

Description

I have issues downloading the SDL2 packages sdl, sdl_ttf, and sdl_image due to a conflict with the libpng dependency.

I decided to use the SDL versions in this post just to check.
https://blog.conan.io/2023/07/20/introduction-to-game-dev-with-sdl2.html
I think there is a discrepancy between the recipes causing the issue.
In the sdl_image recipe we have self.requires("libpng/1.6.40") here on 105 however in the sdl_ttf freetype dependency recipe we have self.requires("libpng/[>=1.6 <2]") here on 61.
I think this is causing a version mismatch.

I am sorry if this post was a waste of time. I am a novice programmer.

Package and Environment Details

• Package Name/Version: zlib/1.2.8
• Operating System+version: Linux Ubuntu 18.04
• Compiler+version: GCC 8
• Docker image: conanio/gcc8
• Conan version: conan 1.18.0
• Python version: Python 3.7.4

Conan profile

my conanfile.py

from conan import ConanFile
from conan.tools.cmake import cmake_layout

class ExampleRecipe(ConanFile):
settings = "os", "compiler", "build_type", "arch"
generators = "CMakeDeps", "CMakeToolchain"

def requirements(self):
# self.requires("sdl/[~2.30]")
self.requires("sdl_ttf/2.0.18")
self.requires("sdl_image/2.0.5")

def layout(self):
cmake_layout(self)

Steps to reproduce

conan install .

Logs

robert@junk:~/code/Cstuff/SDL/final_pendulum$ conan install .

======== Input profiles ========
Profile host:
[settings]
arch=x86_64
build_type=Release
compiler=gcc
compiler.cppstd=gnu17
compiler.libcxx=libstdc++11
compiler.version=11
os=Linux

Profile build:
[settings]
arch=x86_64
build_type=Release
compiler=gcc
compiler.cppstd=gnu17
compiler.libcxx=libstdc++11
compiler.version=11
os=Linux

======== Computing dependency graph ========
Graph root
conanfile.py: /home/robert/code/Cstuff/SDL/final_pendulum/conanfile.py
Requirements
autoconf/2.71#f9307992909d7fb3df459340f1932809 - Cache
automake/1.16.5#058bda3e21c36c9aa8425daf3c1faf50 - Cache
brotli/1.1.0#d56d7bb9ca722942aba17369cb5c0519 - Cache
bzip2/1.0.8#457c272f7da34cb9c67456dd217d36c4 - Cache
egl/system#068ac3037d8cf01f768d0e001e6dcd76 - Cache
expat/2.6.2#2d385d0d50eb5561006a7ff9e356656b - Cache
flac/1.4.2#d4051f8b37ee93725dea40dfd6a10168 - Cache
freetype/2.13.2#7934d59c447d72edcd56025dc60e1aeb - Cache
jbig/20160605#2d29fa02aacd76902e0d2cbbc24631ef - Cache
libalsa/1.2.10#8b568d62190ef588cd5dcdd81171c289 - Cache
libcap/2.69#7ef2d60864c2e58e89db957be936dc49 - Cache
libdeflate/1.19#3ea74a4549efc14d4b1202dc4bfbf602 - Cache
libffi/3.4.4#72cccac6139293b6e97ec9cd676547ff - Cache
libiconv/1.17#73fefc1b696e069df90fd1d18aa63edd - Cache
libjpeg/9e#3cd27a78643419450ee6d3739514d25c - Cache
libmp3lame/3.100#44b12d19316eb2b223d98d3e75dae438 - Cache
libpng/1.6.43#c219d8f01983bac10c404fc613605eef - Cache
libsndfile/1.2.2#b3662f832e29507e8d9840a43737cc14 - Cache
libtiff/4.6.0#51d0e7e15d032aeec1b64e65c44ecd9f - Cache
libtool/2.4.7#08316dad5c72c541ed21e039e4cf217b - Cache
libunwind/1.8.0#045502d366b4ce2bc52a492648e62d2b - Cache
libwebp/1.3.2#52f69c4a31c5cf033fdd9230d77a8e38 - Cache
libxml2/2.12.7#737a1eba03113d1aa22d67579ced7d5e - Cache
m4/1.4.19#b38ced39a01e31fef5435bc634461fd2 - Cache
mpg123/1.31.2#ce831c936b2284e2066ab3dc58a2628e - Cache
ogg/1.3.5#062626875f5c8c59f069f76f148098ef - Cache
opengl/system#4df6fecde4084386beded3ed0e56e4ea - Cache
openssl/3.2.1#64189bfad173ff6dfcf60441d4e26bbe - Cache
opus/1.4#54631f551fc450783fb2df8cd63f80a2 - Cache
pulseaudio/14.2#bedb313afed20242c7caa27ae3e10af8 - Cache
sdl/2.28.3#80647ebd83596b1b39f1f4b6e9daac37 - Cache
sdl_image/2.0.5#33c8f5f63070430ae0e8ec9c3fccaaa7 - Cache
sdl_ttf/2.0.18#a02859d1e05d8241caf2808ad2fdea9c - Cache
vorbis/1.3.7#37e58f52e59a6232199b34ef402714a6 - Cache
wayland/1.22.0#284b56bdbe57868770f46100784e3b4d - Cache
xkbcommon/1.6.0#dababe41c183634d88ad56ef4740c045 - Cache
xkeyboard-config/system#57dd5c08e72ab06bc2ee0e756c0a2c41 - Cache
xorg/system#f626cbdd0ba57d9c53bce2d8b9362fad - Cache
xz_utils/5.4.5#51e5a6e6564f4ea3afd79def01f035ad - Cache
zlib/1.3.1#f52e03ae3d251dec704634230cd806a2 - Cache
zstd/1.5.5#1f239731dc45147c7fc2f54bfbde73df - Cache
Build requirements
autoconf/2.71#f9307992909d7fb3df459340f1932809 - Cache
automake/1.16.5#058bda3e21c36c9aa8425daf3c1faf50 - Cache
bison/3.8.2#ed1ba0c42d2ab7ab64fc3a62e9ecc673 - Cache
cmake/3.29.6#1a639e3e7401ea46e16c83ec9c5a7922 - Cache
expat/2.6.2#2d385d0d50eb5561006a7ff9e356656b - Cache
flex/2.6.4#e35bc44b3fcbcd661e0af0dc5b5b1ad4 - Cache
gettext/0.21#a2bd3513f212013764c9040f4c70ed69 - Cache
gnu-config/cci.20210814#dc430d754f465e8c74463019672fb97b - Cache
libffi/3.4.4#72cccac6139293b6e97ec9cd676547ff - Cache
libiconv/1.17#73fefc1b696e069df90fd1d18aa63edd - Cache
libtool/2.4.7#08316dad5c72c541ed21e039e4cf217b - Cache
libxml2/2.12.7#737a1eba03113d1aa22d67579ced7d5e - Cache
m4/1.4.19#b38ced39a01e31fef5435bc634461fd2 - Cache
meson/1.2.2#04bdfb85d665c82b08a3510aee3ffd19 - Cache
meson/1.3.0#67eebe98438326590a9285377c37cea2 - Cache
meson/1.3.2#d1125ba555ec1a94f165a3412fdf7f88 - Cache
meson/1.4.0#024dfac41ea5570cb1aec3ea6fe34d0a - Cache
ninja/1.11.1#77587f8c8318662ac8e5a7867eb4be21 - Cache
pkgconf/2.0.3#f996677e96e61e6552d85e83756c328b - Cache
pkgconf/2.1.0#27f44583701117b571307cf5b5fe5605 - Cache
wayland/1.22.0#284b56bdbe57868770f46100784e3b4d - Cache
wayland-protocols/1.33#b9e56b7662c2a25f30bfb4eb72df9ad6 - Cache
yasm/1.3.0#fb800a15413dca19bfaef9e4b5d50694 - Cache
zlib/1.3.1#f52e03ae3d251dec704634230cd806a2 - Cache
Resolved version ranges
cmake/[>3.27 <4]: cmake/3.29.6
cmake/[>=3.16 <4]: cmake/3.29.6
cmake/[>=3.18 <4]: cmake/3.29.6
expat/[>=2.6.2 <3]: expat/2.6.2
libpng/[>=1.6 <2]: libpng/1.6.43
libxml2/[>=2.12.5 <3]: libxml2/2.12.7
openssl/[>=1.1 <4]: openssl/3.2.1
zlib/[>=1.2.11 <2]: zlib/1.3.1
ERROR: Version conflict: Conflict between libpng/1.6.40 and libpng/1.6.43 in the graph.
Conflict originates from sdl_image/2.0.5

Run 'conan graph info ... --format=html > graph.html' and open 'graph.html' to inspect the conflict graphically.

[czoido]

Hi @rdbruce,

Thanks for reporting, I will check those recipes and see if we can also introduce version ranges for sdl_image so that we can avoid conflicts. Anyway, I have checked and a conan graph info . for the conanfile.txt of the example here (I see that your conanfile differs in version a bit, could you please update it?): https://github.com/conan-io/examples2/blob/main/examples/libraries/sdl2/introduction/conanfile.txt
is not producing errors, so that may be happening because you already have a version of libpng in your local Cache.
I'm sorry for the late response. Please, do not hesitate to ask any questions about Conan in the Conan repo or about Conan Center Index packages here.