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Now, build fails with Could not find a package configuration file provided by "boost_system":

CMake Warning (dev) at lib/CMakeLists.txt:88 (find_package):
  Policy CMP0167 is not set: The FindBoost module is removed.  Run "cmake
  --help-policy CMP0167" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Error at /usr/lib/cmake/Boost-1.89.0/BoostConfig.cmake:141 (find_package):
  Could not find a package configuration file provided by "boost_system"
  (requested version 1.89.0) with any of the following names:

    boost_systemConfig.cmake
    boost_system-config.cmake

  Add the installation prefix of "boost_system" to CMAKE_PREFIX_PATH or set
  "boost_system_DIR" to a directory containing one of the above files.  If
  "boost_system" provides a separate development package or SDK, be sure it
  has been installed.
Call Stack (most recent call first):
  /usr/lib/cmake/Boost-1.89.0/BoostConfig.cmake:262 (boost_find_component)
  /usr/share/cmake/Modules/FindBoost.cmake:610 (find_package)
  lib/CMakeLists.txt:88 (find_package)


-- Configuring incomplete, errors occurred!

Regards!

Please add -j1 to the make invocations in the PKGBUILD, otherwise build fails for me (on a system where LTO is enabled by default) while linking:

==> Starting build()...
[...]
[100%] Linking CXX executable apngasm
/usr/bin/ld: /tmp/cckVUds4.ltrans0.ltrans.o: in function `main':
<artificial>:(.text.startup+0x66): undefined reference to `apngasm::APNGAsm::APNGAsm()'
/usr/bin/ld: <artificial>:(.text.startup+0x1162): undefined reference to `apngasm::APNGAsm::APNGAsm()'
/usr/bin/ld: <artificial>:(.text.startup+0x11a1): undefined reference to `apngasm::APNGAsm::setAPNGAsmListener(apngasm::listener::IAPNGAsmListener*)'
/usr/bin/ld: <artificial>:(.text.startup+0x1344): undefined reference to `apngasm::APNGAsm::loadAnimationSpec(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
[...]
/usr/bin/ld: <artificial>:(.text+0x8e57): undefined reference to `apngasm::APNGAsm::addFrame(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned int, unsigned int)'
/usr/bin/ld: /tmp/cckVUds4.ltrans1.ltrans.o: in function `apngasm_cli::CLI::~CLI()':
<artificial>:(.text+0x8f93): undefined reference to `apngasm::APNGAsm::~APNGAsm()'
collect2: error: ld returned 1 exit status
make[2]: *** [cli/CMakeFiles/apngasm-cli.dir/build.make:136: cli/apngasm] Error 1
make[1]: *** [CMakeFiles/Makefile2:287: cli/CMakeFiles/apngasm-cli.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
[100%] Built target apngasm-dynamic
make: *** [Makefile:136: all] Error 2
==> ERROR: A failure occurred in build().

A patch to the PKGBUILD:

--- PKGBUILD.orig   2025-03-04 21:49:47.840616685 +0100
+++ PKGBUILD    2025-03-04 21:54:26.607295044 +0100
@@ -52,3 +52,3 @@
    cd $_builddir
-   make ${MAKEFLAGS}
+   make -j1

@@ -62,3 +62,3 @@
   cmake -D CMAKE_INSTALL_PREFIX="/usr" ../
-  make
+  make -j1
 }

Regards and thanks for the package!

FYI, the current version of apngasm is now 3.1.10, but the cli.patch fails because cli.cpp has been modified slightly, but even correcting for that, compilation then fails, saying error: 'boost::filesystem' has not been declared. Trying to omit the patch altogether also fails, with a bunch of undefined reference to 'boost::filesystem' errors. It appears that the apngasm AUR package is also encountering problems with the current version of boost. Given the above, I'm somewhat hesitant to flag this as out-of-date, but I felt it ought to be documented somewhere.

This needs a patch to succeed in building, otherwise there is an undefined "ambiguous reference to 'filesystem' error".

--- a/cli/src/cli.cpp   2021-05-25 10:30:11.939887865 -0400
+++ b/cli/src/cli.cpp   2021-05-25 10:33:19.155408076 -0400
@@ -80,7 +80,7 @@
              createParentDirs(filePath);
              return true;
          }
-         if(!filesystem::exists(filesystem::path(filePath))) {
+         if(!boost::filesystem::exists(boost::filesystem::path(filePath))) {
              createParentDirs(filePath);
              return true;
          }