From 5d02d9591a1501d6a3cf9aa3ae891f88823cb9d4 Mon Sep 17 00:00:00 2001
From: Frankie Dintino <fdintino@gmail.com>
Date: Mon, 22 Jul 2024 13:24:32 -0400
Subject: [PATCH] fix: link against transitive libaom library dependencies

fixes #2274
---
 cmake/Modules/Findaom.cmake  |  9 +++++++++
 cmake/Modules/LocalAom.cmake | 17 +++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/cmake/Modules/Findaom.cmake b/cmake/Modules/Findaom.cmake
index e6b003fb62..6f7a638c11 100644
--- a/cmake/Modules/Findaom.cmake
+++ b/cmake/Modules/Findaom.cmake
@@ -42,9 +42,18 @@ mark_as_advanced(AOM_INCLUDE_DIR AOM_LIBRARY AOM_LIBRARIES)
 if(AOM_LIBRARY)
     if("${AOM_LIBRARY}" MATCHES "\\${CMAKE_STATIC_LIBRARY_SUFFIX}$")
         add_library(aom STATIC IMPORTED GLOBAL)
+        set(_AOM_PC_PREFIX "_AOM_STATIC")
     else()
         add_library(aom SHARED IMPORTED GLOBAL)
+        set(_AOM_PC_PREFIX "_AOM")
     endif()
     set_target_properties(aom PROPERTIES IMPORTED_LOCATION "${AOM_LIBRARY}")
     target_include_directories(aom INTERFACE ${AOM_INCLUDE_DIR})
+
+    target_link_directories(aom INTERFACE "${${_AOM_PC_PREFIX}_LIBRARY_DIRS}")
+
+    set(_AOM_PC_LIBRARIES "${${_AOM_PC_PREFIX}_LIBRARIES}")
+    # remove "aom" so we only have library dependencies
+    list(REMOVE_ITEM _AOM_PC_LIBRARIES "aom")
+    target_link_libraries(aom INTERFACE "${_AOM_PC_LIBRARIES}")
 endif()
diff --git a/cmake/Modules/LocalAom.cmake b/cmake/Modules/LocalAom.cmake
index ebeae0eeec..90d9d9fc9e 100644
--- a/cmake/Modules/LocalAom.cmake
+++ b/cmake/Modules/LocalAom.cmake
@@ -23,6 +23,23 @@ if(EXISTS "${LIB_FILENAME}")
         # ext/avm/aom/aom_encoder.h includes config/aom_config.h which is generated by the local build of avm.
         target_include_directories(aom INTERFACE "${AOM_EXT_SOURCE_DIR}/build.libavif")
     endif()
+
+    # Add link dependency flags from the aom.pc file in ext/aom or ext/avm
+    # by prepending the build directory to PKG_CONFIG_PATH and then calling
+    # pkg_check_modules
+    if(MSVC)
+        set(ENV{PKG_CONFIG_PATH} "${AOM_EXT_SOURCE_DIR}/build.libavif;$ENV{PKG_CONFIG_PATH}")
+    else()
+        set(ENV{PKG_CONFIG_PATH} "${AOM_EXT_SOURCE_DIR}/build.libavif:$ENV{PKG_CONFIG_PATH}")
+    endif()
+
+    pkg_check_modules(_AOM QUIET aom)
+    target_link_directories(aom INTERFACE ${_AOM_STATIC_LIBRARY_DIRS})
+
+    set(_AOM_PC_LIBRARIES ${_AOM_STATIC_LIBRARIES})
+    # remove "aom" so we only have library dependencies
+    list(REMOVE_ITEM _AOM_PC_LIBRARIES "aom")
+    target_link_libraries(aom INTERFACE ${_AOM_PC_LIBRARIES})
 else()
     message(STATUS "${AOM_MESSAGE_PREFIX}: compiled library not found at ${LIB_FILENAME}, using FetchContent")
     if(EXISTS "${AOM_EXT_SOURCE_DIR}")