From 35478ce6e9e6f313c70d6a92243c323167b81a38 Mon Sep 17 00:00:00 2001
From: Bee Klimt <bklimt@launchdarkly.com>
Date: Mon, 3 Aug 2026 15:46:03 -0700
Subject: [PATCH 1/2] fix: Disable Foxy separate compilation to avoid
 Boost.Asio ODR crash

---
 CMakeLists.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f3ceb73f2..b2d0276c8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -205,6 +205,12 @@ find_package(Boost 1.81 REQUIRED COMPONENTS json url coroutine)
 message(STATUS "LaunchDarkly: using Boost v${Boost_VERSION}")
 
 set(FOXY_BUILD_TESTING OFF)
+
+# Keep Boost.Asio header-only, matching how consumers compile it. Foxy's
+# separate-compilation mode bakes Asio internals into our library whose layout can
+# diverge from a consumer's build, causing ODR violations when linked. Force off.
+set(FOXY_FAST_BUILD OFF CACHE BOOL "Keep Boost.Asio header-only for ABI compatibility with consumers" FORCE)
+
 add_subdirectory(vendor/foxy)
 
 

From 4392bb341915d60f0b68a212677e310462bd70c5 Mon Sep 17 00:00:00 2001
From: Bee Klimt <bklimt@launchdarkly.com>
Date: Mon, 3 Aug 2026 16:46:44 -0700
Subject: [PATCH 2/2] fix: Stop libs/networking from forcing Boost separate
 compilation

---
 libs/networking/src/CMakeLists.txt | 2 --
 1 file changed, 2 deletions(-)

diff --git a/libs/networking/src/CMakeLists.txt b/libs/networking/src/CMakeLists.txt
index bf229726d..a3aa8f24a 100644
--- a/libs/networking/src/CMakeLists.txt
+++ b/libs/networking/src/CMakeLists.txt
@@ -35,8 +35,6 @@ target_compile_features(${LIBNAME} PUBLIC cxx_std_17)
 target_compile_definitions(${LIBNAME}
     PUBLIC
         LD_CURL_NETWORKING
-        BOOST_ASIO_SEPARATE_COMPILATION=1
-        BOOST_BEAST_SEPARATE_COMPILATION=1
 )
 
 # Using PUBLIC_HEADERS would flatten the include.