From 4753b3a5c60846d0b211142accca2062be77cb17 Mon Sep 17 00:00:00 2001
From: Geoffrey McRae <geoff@hostfission.com>
Date: Fri, 6 Nov 2026 19:46:25 +1100
Subject: [PATCH] [build] ci: fix platform build regressions

Correct the clean IDD MsQuic archive lookup and enable XSAVE
for MinGW CPU probing.

Compile audio transports with precise floating-point semantics so
finite-value validation remains valid under Clang. Install the OBS
samplerate development dependency.
---
 .github/workflows/build.yml                |  4 +++-
 client/transports/LGMP/CMakeLists.txt      | 10 ++++++++++
 client/transports/Network/CMakeLists.txt   | 10 ++++++++++
 cmake/MsQuic.Static.targets                |  2 +-
 common/src/platform/windows/CMakeLists.txt |  4 ++++
 5 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b817025a..b3e2a425 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -218,7 +218,9 @@ jobs:
         sudo apt-get update
     - name: Install obs plugin dependencies
       run: |
-        sudo apt-get install libdw-dev libunwind-dev libobs-dev libgl1-mesa-dev
+        sudo apt-get install \
+          libdw-dev libunwind-dev libobs-dev libgl1-mesa-dev \
+          libsamplerate0-dev
     - name: Configure obs plugin
       run: |
         mkdir obs/build
diff --git a/client/transports/LGMP/CMakeLists.txt b/client/transports/LGMP/CMakeLists.txt
index bb773ce6..764f483e 100644
--- a/client/transports/LGMP/CMakeLists.txt
+++ b/client/transports/LGMP/CMakeLists.txt
@@ -17,6 +17,16 @@ endif()
 
 if(ENABLE_AUDIO)
   list(APPEND TRANSPORT_LGMP_SOURCES audio.c)
+
+  if(MSVC)
+    set_source_files_properties(audio.c PROPERTIES
+      COMPILE_OPTIONS "/fp:precise"
+    )
+  elseif(CMAKE_C_COMPILER_ID MATCHES "GNU|Clang")
+    set_source_files_properties(audio.c PROPERTIES
+      COMPILE_OPTIONS "-fno-fast-math"
+    )
+  endif()
 endif()
 
 add_library(transport_LGMP STATIC ${TRANSPORT_LGMP_SOURCES})
diff --git a/client/transports/Network/CMakeLists.txt b/client/transports/Network/CMakeLists.txt
index 0ff60de4..71c637d0 100644
--- a/client/transports/Network/CMakeLists.txt
+++ b/client/transports/Network/CMakeLists.txt
@@ -20,6 +20,16 @@ set(TRANSPORT_NETWORK_SOURCES
   video/pyrowave.c
 )
 
+if(MSVC)
+  set_source_files_properties(audio.c PROPERTIES
+    COMPILE_OPTIONS "/fp:precise"
+  )
+elseif(CMAKE_C_COMPILER_ID MATCHES "GNU|Clang")
+  set_source_files_properties(audio.c PROPERTIES
+    COMPILE_OPTIONS "-fno-fast-math"
+  )
+endif()
+
 if(WIN32)
   list(APPEND TRANSPORT_NETWORK_SOURCES
     platform/windows/auth_crypto.c
diff --git a/cmake/MsQuic.Static.targets b/cmake/MsQuic.Static.targets
index d214cb36..fee62022 100644
--- a/cmake/MsQuic.Static.targets
+++ b/cmake/MsQuic.Static.targets
@@ -6,7 +6,7 @@
     <LGMsQuicArchitecture Condition="'$(Platform)'=='Win32'">Win32</LGMsQuicArchitecture>
     <LGMsQuicArchitecture Condition="'$(Platform)'=='x64'">x64</LGMsQuicArchitecture>
     <LGMsQuicLibraryDir>$(LGMsQuicBuildDir)obj\$(LGBaseConfiguration)\</LGMsQuicLibraryDir>
-    <LGMsQuicStaticLibrary>$(LGMsQuicLibraryDir)msquic_static.lib</LGMsQuicStaticLibrary>
+    <LGMsQuicStaticLibrary>$(LGMsQuicLibraryDir)msquic.lib</LGMsQuicStaticLibrary>
     <LGMsQuicCoreLibrary>$(LGMsQuicLibraryDir)core.lib</LGMsQuicCoreLibrary>
     <LGMsQuicPlatformLibrary>$(LGMsQuicLibraryDir)msquic_platform.lib</LGMsQuicPlatformLibrary>
   </PropertyGroup>
diff --git a/common/src/platform/windows/CMakeLists.txt b/common/src/platform/windows/CMakeLists.txt
index 15ff15c3..c3f00b56 100644
--- a/common/src/platform/windows/CMakeLists.txt
+++ b/common/src/platform/windows/CMakeLists.txt
@@ -11,6 +11,10 @@ add_compile_definitions(WINVER=0x0601 _WIN32_WINNT=0x0601)
 if(MINGW)
   add_compile_definitions(__USE_MINGW_ANSI_STDIO=0)
 
+  set_property(SOURCE cpuinfo.c APPEND PROPERTY
+    COMPILE_OPTIONS -mxsave
+  )
+
   # Build our own ntdll.dll import library
   # This tricks MinGW into not linking stuff like memcpy from ntdll.dll instead of mscvrt.dll
   if(NOT CMAKE_DLLTOOL)