[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

@@ -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

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})

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

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>

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)