From 35cb00861b300ead897af52fd885d618b4460ac5 Mon Sep 17 00:00:00 2001
From: Austin Benoit <austinbenoit@google.com>
Date: Fri, 7 Aug 2026 11:51:56 -0400
Subject: [PATCH] Fix Issue #1902: Explicitly set CMAKE_OSX_DEPLOYMENT_TARGET
 to 15.0

---
 build_scripts/ios/build.sh    | 1 +
 build_scripts/tvos/build.sh   | 1 +
 cmake/external_rules.cmake    | 4 ++++
 release_build_files/readme.md | 4 ++++
 scripts/gha/build_ios_tvos.py | 1 +
 test_mac_ios.sh               | 2 +-
 test_mac_ios_simulator.sh     | 2 +-
 7 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/build_scripts/ios/build.sh b/build_scripts/ios/build.sh
index c594db826d..6ee1c2db7d 100755
--- a/build_scripts/ios/build.sh
+++ b/build_scripts/ios/build.sh
@@ -134,6 +134,7 @@ if ${generateMakefiles}; then
             mkdir -p ${buildpath}/ios_build_file/${platform}-${arch} && cd ${buildpath}/ios_build_file/${platform}-${arch}
             cmake -G Xcode -DCMAKE_SYSTEM_NAME=iOS \
                 ${sysroot_arg} \
+                -DCMAKE_OSX_DEPLOYMENT_TARGET=15.0 \
                 -DCMAKE_OSX_ARCHITECTURES=${arch} \
                 -DCMAKE_ARCHIVE_OUTPUT_DIRECTORY=${buildpath}/${frameworkspath}/${platform}-${arch} \
                 -DCMAKE_ARCHIVE_OUTPUT_DIRECTORY_DEBUG=${buildpath}/${frameworkspath}/${platform}-${arch} \
diff --git a/build_scripts/tvos/build.sh b/build_scripts/tvos/build.sh
index 1b87066c5c..587437b96f 100755
--- a/build_scripts/tvos/build.sh
+++ b/build_scripts/tvos/build.sh
@@ -135,6 +135,7 @@ if ${generateMakefiles}; then
             echo "generate Makefiles start"
             mkdir -p ${buildpath}/tvos_build_file/${platform}-${arch} && cd ${buildpath}/tvos_build_file/${platform}-${arch}
             cmake -DCMAKE_SYSTEM_NAME=tvOS \
+                  -DCMAKE_OSX_DEPLOYMENT_TARGET=15.0 \
                   -DCMAKE_OSX_ARCHITECTURES=${arch} \
                   ${sysroot_arg} \
                   -DCMAKE_ARCHIVE_OUTPUT_DIRECTORY=${buildpath}/${frameworkspath}/${platform}-${arch} \
diff --git a/cmake/external_rules.cmake b/cmake/external_rules.cmake
index b2416191c1..4a3d846883 100644
--- a/cmake/external_rules.cmake
+++ b/cmake/external_rules.cmake
@@ -169,6 +169,10 @@ function(build_external_dependencies)
       set(CMAKE_SUB_CONFIGURE_OPTIONS ${CMAKE_SUB_CONFIGURE_OPTIONS}
           -DCMAKE_OSX_ARCHITECTURES=${CMAKE_OSX_ARCHITECTURES})
     endif()
+    if(CMAKE_OSX_DEPLOYMENT_TARGET)
+      set(CMAKE_SUB_CONFIGURE_OPTIONS ${CMAKE_SUB_CONFIGURE_OPTIONS}
+          -DCMAKE_OSX_DEPLOYMENT_TARGET=${CMAKE_OSX_DEPLOYMENT_TARGET})
+    endif()
   elseif(MSVC)
     # Propagate MSVC build flags.
     set(CMAKE_SUB_CONFIGURE_OPTIONS ${CMAKE_SUB_CONFIGURE_OPTIONS}
diff --git a/release_build_files/readme.md b/release_build_files/readme.md
index 69cf7ca6fa..83d8df55cd 100644
--- a/release_build_files/readme.md
+++ b/release_build_files/readme.md
@@ -613,6 +613,10 @@ workflow use only during the development of your app, not for publicly shipping
 code.
 
 ## Release Notes
+### Upcoming
+- Changes
+    - General (iOS): Fixed an issue where prebuilt iOS/tvOS frameworks had an incorrect minimum deployment target (minos), which caused linker warnings.
+
 ### 13.11.0
 - Changes
     - General (Android): Update to Firebase Android BoM version 34.17.0.
diff --git a/scripts/gha/build_ios_tvos.py b/scripts/gha/build_ios_tvos.py
index 62d68b557b..7dc6588a31 100644
--- a/scripts/gha/build_ios_tvos.py
+++ b/scripts/gha/build_ios_tvos.py
@@ -494,6 +494,7 @@ def cmake_configure(source_path, build_path, toolchain, archive_output_path,
   cmd.append('-DCMAKE_ARCHIVE_OUTPUT_DIRECTORY={0}'.format(archive_output_path))
   cmd.append('-DCMAKE_LIBRARY_OUTPUT_DIRECTORY={0}'.format(archive_output_path))
   cmd.append('-DCMAKE_RUNTIME_OUTPUT_DIRECTORY={0}'.format(archive_output_path))
+  cmd.append('-DCMAKE_OSX_DEPLOYMENT_TARGET=15.0')
   if architecture:
     cmd.append('-DCMAKE_OSX_ARCHITECTURES={0}'.format(architecture))
   utils.run_command(cmd)
diff --git a/test_mac_ios.sh b/test_mac_ios.sh
index 04f353d7cb..f32b1dbb0e 100755
--- a/test_mac_ios.sh
+++ b/test_mac_ios.sh
@@ -27,7 +27,7 @@ cd mac_ios_build
 
 # Configure cmake with tests enabled
 # and disable use of libsecret due to not working on kokoro builders
-cmake -DCMAKE_SYSTEM_NAME=iOS .. -DFIREBASE_CPP_BUILD_TESTS=ON -DFIREBASE_FORCE_FAKE_SECURE_STORAGE=ON "$@"
+cmake -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_DEPLOYMENT_TARGET=15.0 .. -DFIREBASE_CPP_BUILD_TESTS=ON -DFIREBASE_FORCE_FAKE_SECURE_STORAGE=ON "$@"
 
 # Build the SDK and the tests
 cpus=$(sysctl -n hw.ncpu)
diff --git a/test_mac_ios_simulator.sh b/test_mac_ios_simulator.sh
index ec98fb58fc..aec2086915 100755
--- a/test_mac_ios_simulator.sh
+++ b/test_mac_ios_simulator.sh
@@ -25,7 +25,7 @@ set -x
 mkdir -p mac_ios_simulator_build
 cd mac_ios_simulator_build
 
-cmake -G Xcode -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_SYSROOT=iphonesimulator .. -DCLANG_ENABLE_MODULES=YES -DFIREBASE_CPP_BUILD_TESTS=ON -DFIREBASE_FORCE_FAKE_SECURE_STORAGE=ON "$@"
+cmake -G Xcode -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_DEPLOYMENT_TARGET=15.0 -DCMAKE_OSX_SYSROOT=iphonesimulator .. -DCLANG_ENABLE_MODULES=YES -DFIREBASE_CPP_BUILD_TESTS=ON -DFIREBASE_FORCE_FAKE_SECURE_STORAGE=ON "$@"
 
 # Build the SDK and the tests
 cmake --build .