Arch Linux User Repository

@bipoexp thanks, I will include that in the PKGBUILD.

A friend had compile errors, and trying to rebuild clean I also saw the error. Apparently, newer versions Qt are a little more strict about inferred types.

~/.cache/yay/polymc/src/PolyMC-7.0/launcher/minecraft/launch/ConfigureAuthlibInjector.cpp: In lambda function:
~/.cache/yay/polymc/src/PolyMC-7.0/launcher/minecraft/launch/ConfigureAuthlibInjector.cpp:34:61: error: conversion from ‘QString’ to non-scalar type ‘QFile’ requested
   34 |         QFile authlibInjectorLatestJson = entry->getFullPath();
      |                                           ~~~~~~~~~~~~~~~~~~^~

The upstream has a merged pull that fixes it, but it is in the develop branch. The commit that patches the two files to fix it is 470283a. Thankfully, github can autogenerate patch files. patch for files

I edit my PKGBUILD as follows: - added to source the line "fix-qt-debug.patch::https://github.com/PolyMC/PolyMC/commit/0dc124d636d76692b1e2c01050743dd87dc78a05.patch" - add to sha256subs the line 'SKIP' - I then added the following prepare section:

prepare() {
  cd "$srcdir/PolyMC-$pkgver"
  patch -p1 < "$srcdir/fix-qt-debug.patch"
}

I then installed it with makepkg -cCsif (clean before and after, install dependencies, install after build, force building package again)

I hope this helps someone. (And that I didn't make a typo)

I was already on JRE 17, but it was failing as below have been as I am on JRE 17.0.9. Apparently that was causing an issue, but I switched over to JRE 8 and it built correctly. I can switch back to JRE 17 after.

this package and other polymc packages (tested polymc-bin and polymc-qt5-bin) have the checksum incorrectly calculated:

==> Validating source files with sha256sums...
    PolyMC-6.0.tar.gz ... FAILED
==> ERROR: One or more files did not pass the validity check!

here's a quick check i did:

 ~/Dow/polymc > sha256sum PolyMC-6.0.tar.gz                                                            
8b9af09a0abbe6a9ccbe8f5aca5a7f445ebbc9e1e59fc220974eedd703684447  PolyMC-6.0.tar.gz
 ~/Dow/polymc > grep 'sha256sums=' PKGBUILD                                                            
sha256sums=('ed8a43555c9fcfa783193a0377c6353bb5c9360a0e5742bbb6be4f7c6e7b2704')

I would recommend the following changes since jdk17 is the latest supported lts and a chroot build (or any other build) can have issues if another version of java is on the system or is set to something else. This forces the use of jdk17 during compilation unconditionally. From what I've seen the use of JAVA_HOME is only frowned upon in runtime scripts: https://wiki.archlinux.org/title/Java_package_guidelines#Java_packaging_on_Arch_Linux

diff --git a/PKGBUILD b/PKGBUILD
index 0b600cf..f898711 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -16,7 +16,7 @@ url="https://github.com/PolyMC/PolyMC"
 license=('GPL3')
 depends=('java-runtime' 'libgl' 'qt6-base' 'qt6-5compat' 'qt6-svg'
          'qt6-imageformats' 'zlib' 'hicolor-icon-theme' 'quazip-qt6' 'qt6-charts')
-makedepends=('cmake' 'extra-cmake-modules' 'java-environment' 'scdoc')
+makedepends=('cmake' 'extra-cmake-modules' 'java-environment=17' 'scdoc')
 optdepends=('glfw: to use system GLFW libraries'
             'openal: to use system OpenAL libraries'
             'visualvm: Profiling support'
@@ -26,6 +26,7 @@ source=("https://github.com/PolyMC/PolyMC/releases/download/$pkgver/PolyMC-$pkgv
 sha256sums=('ed8a43555c9fcfa783193a0377c6353bb5c9360a0e5742bbb6be4f7c6e7b2704')

 build() {
+  export JAVA_HOME=/usr/lib/jvm/java-17-openjdk
   cmake -B build -S PolyMC-$pkgver \
       -DLauncher_BUILD_PLATFORM='archlinux' \
       -DLauncher_QT_VERSION_MAJOR='6' \

Since this fails to build on java 20, could you change the make dependency to something like 'java-environment<=17'? That way, it should build correctly in a clean chroot without manual intervention.

Another build failure:

[ 30%] Building CXX object launcher/CMakeFiles/Launcher_logic.dir/InstanceCreationTask.cpp.o
In file included from /home/joe/.cache/paru/clone/polymc/src/PolyMC-5.1/launcher/minecraft/ProfileUtils.h:38,
                 from /home/joe/.cache/paru/clone/polymc/src/PolyMC-5.1/launcher/minecraft/PackProfile.h:47,
                 from /home/joe/.cache/paru/clone/polymc/src/build/launcher/Launcher_logic_autogen/EWIEGA46WW/../../../../PolyMC-5.1/launcher/ui/pages/instance/VersionPage.h:41,
                 from /home/joe/.cache/paru/clone/polymc/src/build/launcher/Launcher_logic_autogen/EWIEGA46WW/../../../../PolyMC-5.1/launcher/InstancePageProvider.h:7,
                 from /home/joe/.cache/paru/clone/polymc/src/build/launcher/Launcher_logic_autogen/EWIEGA46WW/moc_InstancePageProvider.cpp:9,
                 from /home/joe/.cache/paru/clone/polymc/src/build/launcher/Launcher_logic_autogen/mocs_compilation.cpp:9:
/home/joe/.cache/paru/clone/polymc/src/PolyMC-5.1/launcher/minecraft/VersionFile.h:141:22: warning: identifier ‘requires’ is a keyword in C++20 [-Wc++20-compat]
  141 |     Meta::RequireSet requires;
      |                      ^~~~~~~~
In file included from /usr/include/c++/13.1.1/functional:57,
                 from /usr/include/qt6/QtCore/qrunnable.h:8,
                 from /usr/include/qt6/QtCore/QRunnable:1,
                 from /home/joe/.cache/paru/clone/polymc/src/PolyMC-5.1/launcher/tasks/Task.h:38,
                 from /home/joe/.cache/paru/clone/polymc/src/PolyMC-5.1/launcher/InstanceCopyTask.h:3,
                 from /home/joe/.cache/paru/clone/polymc/src/PolyMC-5.1/launcher/InstanceCopyTask.cpp:1:
/usr/include/c++/13.1.1/bits/refwrap.h:109:1: internal compiler error: in cp_parser_lookup_name, at cp/parser.cc:31213
  109 | _GLIBCXX_MEM_FN_TRAITS(& noexcept, true_type, false_type)
      | ^~~~~~~~~~~~~~~~~~~~~~
0x1ad4bb8 internal_error(char const*, ...)
    ???:0
0x6b7b33 fancy_abort(char const*, int, char const*)
    ???:0
0x944010 c_common_parse_file()
    ???:0
Please submit a full bug report, with preprocessed source (by using -freport-bug).
Please include the complete backtrace with any bug report.
See <https://bugs.archlinux.org/> for instructions.
make[2]: *** [launcher/CMakeFiles/Launcher_logic.dir/build.make:1023: launcher/CMakeFiles/Launcher_logic.dir/InstanceCopyTask.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [CMakeFiles/Makefile2:2721: launcher/CMakeFiles/Launcher_logic.dir/all] Error 2
make: *** [Makefile:146: all] Error 2
==> ERROR: A failure occurred in build().
    Aborting...
error: failed to build 'polymc-5.1-2':
error: packages failed to build: polymc-5.1-2

warning: [options] bootstrap class path not set in conjunction with -source 7
error: Source option 7 is no longer supported. Use 8 or later.
error: Target option 7 is no longer supported. Use 8 or later.
make[2]: *** [libraries/launcher/CMakeFiles/NewLaunch.dir/build.make:93: 
libraries/launcher/CMakeFiles/NewLaunch.dir/java_compiled_NewLaunch] Error 2
make[1]: *** [CMakeFiles/Makefile2:1418: 
libraries/launcher/CMakeFiles/NewLaunch.dir/all] Error 2
make: *** [Makefile:146: all] Error 2
==> ERROR: A failure occurred in build().
    Aborting...

This seems to be a problem with the Java version. I solved it by switching to version 17.

pacman -S jre17-openjdk jdk17-openjdk
sudo archlinux-java set java-17-openjdk

After compile and install I switched back to Java 20.

sudo archlinux-java set java-20-openjdk

警告: [options] 未与 -source 7 一起设置引导类路径
错误: 不再支持源选项 7。请使用 8 或更高版本。
错误: 不再支持目标选项 7。请使用 8 或更高版本。
make[2]: *** [libraries/launcher/CMakeFiles/NewLaunch.dir/build.make:93：
libraries/launcher/CMakeFiles/NewLaunch.dir/java_compiled_NewLaunch] 错误 2
make[1]: *** [CMakeFiles/Makefile2:1418：
libraries/launcher/CMakeFiles/NewLaunch.dir/all] 错误 2
make: *** [Makefile:146：all] 错误 2
==> 错误： 在 build() 中发生一个错误。    
正在放弃...
错误: 未能构建 'polymc-5.1-1': 
错误: 未能构建的软件包: polymc-5.1-1

I use java20 and get this error