[package] qt/6.4.1: issues with fontconfig

[EricAtORS]

Description

I'm trying to build qt/6.4.1 and I keep getting build errors with fontconfig missing symbols.
The symbols come from expat.

I tried addiing a self.cpp_info.requires = ["expat::expat"] to the package_info of fontconfig and rebuilding it, but it did not resolve the issue.

Package and Environment Details

• Package Name/Version: qt/6.4.1
• Operating System+version: AlmaLinux 8.6
• Compiler+version: GCC 10
• Conan version: conan 1.55.0

Conan profile

[settings]
os=Linux
os_build=Linux
arch=x86_64
arch_build=x86_64
compiler=gcc
compiler.version=10
compiler.libcxx=libstdc++
build_type=Release
[options]
[conf]
[build_requires]
[env]

Steps to reproduce

conan install -r conancenter qt/6.4.1@

I don't know how to specify version dependencies in the command line, but these are the versions that were outputted from conan info for my recipe:

depencies for qt

        zlib/1.2.13
        openssl/1.1.1s
        pcre2/10.37
        double-conversion/3.2.1
        freetype/2.12.1
        fontconfig/2.13.93
        icu/70.1
        harfbuzz/5.2.0
        libjpeg/9e
        libpng/1.6.39
        xorg/system
        xkbcommon/1.4.1
        opengl/system
        zstd/1.5.2
        wayland/1.21.0
        brotli/1.0.9
        dbus/1.15.0
        md4c/0.4.8

And these are my build options for qt

Buid options

        -o shared=True
        -o qttools=True
        -o qtwebchannel=False
        -o qtwebengine=False
        -o qtwebsockets=False
        -o qt5compat=True
        -o qtsvg=True
        -o qtimageformats=True
        -o qtscxml=True
        -o qtmultimedia=False
        -o qtactiveqt=False
        -o qtdatavis3d=False
        -o qtdeclarative=False
        -o qtlanguageserver=False
        -o qtshadertools=True  # needed for the web engine and for certain aspects of font rendering
        -o qtcoap=False
        -o qtcharts=False
        -o qtconnectivity=False
        -o qtvirtualkeyboard=False
        -o qtwayland=True
        -o qtserialbus=False
        -o qtsensors=False
        -o with_sqlite3=False
        -o with_mysql=False
        -o with_pq=False
        -o with_odbc=False
        -o with_libjpeg=libjpeg
        -o with_libpng=True
        -o with_zstd=True
        -o with_md4c=True
        -o with_freetype=True
        -o with_glib=False
        -o with_dbus=True
        -o with_icu=True
        -o gui=True
        -o widgets=True      

Logs

Click to expand log

/opt/rh/gcc-toolset-10/root/usr/bin/ld: /work/linux/.conan/data/fontconfig/2.13.93/_/_/package/ebf14a7c2e256d19a84a210a82
1beaa67f0a0a9c/lib/libfontconfig.a(fcxml.c.o): in function `FcConfigMessage.constprop.1':
fcxml.c:(.text+0x6d6): undefined reference to `XML_GetCurrentLineNumber'
/opt/rh/gcc-toolset-10/root/usr/bin/ld: fcxml.c:(.text+0x749): undefined reference to `XML_GetCurrentLineNumber'
/opt/rh/gcc-toolset-10/root/usr/bin/ld: /work/linux/.conan/data/fontconfig/2.13.93/_/_/package/ebf14a7c2e256d19a84a210a82
1beaa67f0a0a9c/lib/libfontconfig.a(fcxml.c.o): in function `FcConfigMessage.constprop.0':
fcxml.c:(.text+0xd16): undefined reference to `XML_GetCurrentLineNumber'
/opt/rh/gcc-toolset-10/root/usr/bin/ld: fcxml.c:(.text+0xd91): undefined reference to `XML_GetCurrentLineNumber'
/opt/rh/gcc-toolset-10/root/usr/bin/ld: /work/linux/.conan/data/fontconfig/2.13.93/_/_/package/ebf14a7c2e256d19a84a210a82
1beaa67f0a0a9c/lib/libfontconfig.a(fcxml.c.o): in function `FcConfigParseAndLoadFromMemoryInternal':
fcxml.c:(.text+0x1a3a): undefined reference to `XML_ParserCreate'
/opt/rh/gcc-toolset-10/root/usr/bin/ld: fcxml.c:(.text+0x1ac3): undefined reference to `XML_SetUserData'
/opt/rh/gcc-toolset-10/root/usr/bin/ld: fcxml.c:(.text+0x1ad9): undefined reference to `XML_SetDoctypeDeclHandler'
/opt/rh/gcc-toolset-10/root/usr/bin/ld: fcxml.c:(.text+0x1aef): undefined reference to `XML_SetElementHandler'
/opt/rh/gcc-toolset-10/root/usr/bin/ld: fcxml.c:(.text+0x1afe): undefined reference to `XML_SetCharacterDataHandler'
/opt/rh/gcc-toolset-10/root/usr/bin/ld: fcxml.c:(.text+0x1b11): undefined reference to `XML_GetBuffer'
/opt/rh/gcc-toolset-10/root/usr/bin/ld: fcxml.c:(.text+0x1b7a): undefined reference to `XML_ParseBuffer'
/opt/rh/gcc-toolset-10/root/usr/bin/ld: fcxml.c:(.text+0x1b86): undefined reference to `XML_GetErrorCode'
/opt/rh/gcc-toolset-10/root/usr/bin/ld: fcxml.c:(.text+0x1b8d): undefined reference to `XML_ErrorString'
/opt/rh/gcc-toolset-10/root/usr/bin/ld: fcxml.c:(.text+0x1bdf): undefined reference to `XML_ParserFree'
/opt/rh/gcc-toolset-10/root/usr/bin/ld: fcxml.c:(.text+0x1c77): undefined reference to `XML_ParseBuffer'
collect2: error: ld returned 1 exit status```

Here's the full build log:
https://pastebin.com/XmJecmWV

[ericLemanissier]

Are you really using the vanilla qt recipe from conan-center ? because your log has qt/6.4.1 from 'ors' - Cache. also, it has no qt/6.4.1: Generator cmake_find_package, and you have the exact same error as my pr #14592

[EricAtORS]

That is it.
I'll close the issue for now.

I wanted to use the same recipe on both windows and linux and you previously suggested to patch conanfile as per #13144 from #14327