ossia · jcelerier · Jun 22, 2026 · Jun 21, 2026
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -54,7 +54,8 @@ endif()
 if(OSSIA_TESTING)
   set(CMAKE_CTEST_ARGUMENTS --rerun-failed --output-on-failure)
   include(CTest)
-  if(OSSIA_USE_SYSTEM_LIBRARIES)
+  ossia_use_system(use_sys Catch2)
+  if(use_sys)
     find_package(Catch2 CONFIG REQUIRED)
     if(NOT TARGET Catch2::Catch2WithMain)
       add_library(Catch2WithMain INTERFACE)

diff --git a/cmake/OssiaOptions.cmake b/cmake/OssiaOptions.cmake
@@ -1,5 +1,16 @@
 # Build settings :
 option(OSSIA_USE_SYSTEM_LIBRARIES "Use system versions of the third-party libraries if possible")
+
+function(ossia_use_system out pkg)
+  if(NOT DEFINED OSSIA_USE_SYSTEM_${pkg})
+    set(OSSIA_USE_SYSTEM_${pkg} "" CACHE STRING "")
+  endif()
+  if(NOT "${OSSIA_USE_SYSTEM_${pkg}}" STREQUAL "")
+    set(${out} "${OSSIA_USE_SYSTEM_${pkg}}" PARENT_SCOPE)
+  else()
+    set(${out} "${OSSIA_USE_SYSTEM_LIBRARIES}" PARENT_SCOPE)
+  endif()
+endfunction()
 option(OSSIA_STATIC "Make a static build" OFF)
 option(OSSIA_INSTALL_STATIC_DEPENDENCIES "Generate install rules for wiiuse, etc" OFF)
 option(OSSIA_FAST_DEVELOPER_BUILD "Create shared libraries for some third-party libraries" OFF)

diff --git a/cmake/deps/coap.cmake b/cmake/deps/coap.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys libcoap)
+if(use_sys)
     find_path(LIBCOAP_INCLUDEDIR coap3/libcoap.h)
     find_library(LIBCOAP_GNUTLS_LIBRARIES coap-3-gnutls)
     find_library(LIBCOAP_LIBRARIES coap-3)

diff --git a/cmake/deps/concurrentqueue.cmake b/cmake/deps/concurrentqueue.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys concurrentqueue)
+if(use_sys)
   find_package(concurrentqueue 1.0 CONFIG GLOBAL)
   if(TARGET concurrentqueue::concurrentqueue)
     get_target_property(cq_include_dirs concurrentqueue::concurrentqueue  INTERFACE_INCLUDE_DIRECTORIES)

diff --git a/cmake/deps/ctre.cmake b/cmake/deps/ctre.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys ctre)
+if(use_sys)
   find_package(ctre 3.7 CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/dno.cmake b/cmake/deps/dno.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys dno)
+if(use_sys)
   find_package(dno CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/dr_libs.cmake b/cmake/deps/dr_libs.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys dr_libs)
+if(use_sys)
   find_path(DR_LIBS_INCLUDE_DIR dr_wav.h)
 endif()
 

diff --git a/cmake/deps/exprtk.cmake b/cmake/deps/exprtk.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys exprtk)
+if(use_sys)
   find_path(EXPRTK_INCLUDE_DIR exprtk.hpp)
 endif()
 

diff --git a/cmake/deps/fmt.cmake b/cmake/deps/fmt.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys fmt)
+if(use_sys)
   find_package(fmt CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/kfr.cmake b/cmake/deps/kfr.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys KFR)
+if(use_sys)
   # KFR
   if(OSSIA_ENABLE_KFR)
     find_package(KFR)

diff --git a/cmake/deps/magic_enum.cmake b/cmake/deps/magic_enum.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys magic_enum)
+if(use_sys)
   find_package(magic_enum CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/mdspan.cmake b/cmake/deps/mdspan.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys mdspan)
+if(use_sys)
   find_package(mdspan CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/mqtt.cmake b/cmake/deps/mqtt.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys async-mqtt5)
+if(use_sys)
   find_package(async-mqtt5 CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/nano-signal-slot.cmake b/cmake/deps/nano-signal-slot.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys nanosignal)
+if(use_sys)
   find_path(NANOSIGNAL_INCLUDE_DIR nano_observer.hpp)
 endif()
 

diff --git a/cmake/deps/oscpack.cmake b/cmake/deps/oscpack.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys oscpack)
+if(use_sys)
   find_package(oscpack 1.2 CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/perlinnoise.cmake b/cmake/deps/perlinnoise.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys perlinnoise)
+if(use_sys)
   find_path(PERLINNOISE_INCLUDE_DIR PerlinNoise.hpp)
 endif()
 

diff --git a/cmake/deps/rapidfuzz.cmake b/cmake/deps/rapidfuzz.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys rapidfuzz)
+if(use_sys)
   find_package(rapidfuzz CONFIG REQUIRED GLOBAL)
 endif()
 

diff --git a/cmake/deps/rapidhash.cmake b/cmake/deps/rapidhash.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys rapidhash)
+if(use_sys)
   find_package(rapidhash CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/rapidjson.cmake b/cmake/deps/rapidjson.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys RapidJSON)
+if(use_sys)
   find_package(RapidJSON 1.2 CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/re2.cmake b/cmake/deps/re2.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys re2)
+if(use_sys)
   find_package(re2 QUIET CONFIG)
   if(NOT TARGET re2::re2)
     find_library(RE2_LIBRARY NAMES re2)

diff --git a/cmake/deps/readerwriterqueue.cmake b/cmake/deps/readerwriterqueue.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys readerwriterqueue)
+if(use_sys)
   find_path(READERWRITERQUEUE_INCLUDE_DIR readerwriterqueue.h)
 endif()
 

diff --git a/cmake/deps/rnd.cmake b/cmake/deps/rnd.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys rnd)
+if(use_sys)
   find_package(rnd CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/rubberband.cmake b/cmake/deps/rubberband.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys rubberband)
+if(use_sys)
   find_library(RUBBERBAND_LIBRARY NAMES rubberband)
   find_path(RUBBERBAND_INCLUDE_DIR rubberband/RubberBandStretcher.h)
 

diff --git a/cmake/deps/samplerate.cmake b/cmake/deps/samplerate.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys SampleRate)
+if(use_sys)
   find_package(SampleRate CONFIG GLOBAL)
 
   if(NOT TARGET SampleRate::samplerate)

diff --git a/cmake/deps/servus.cmake b/cmake/deps/servus.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys Servus)
+if(use_sys)
   find_package(Servus CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/smallfunction.cmake b/cmake/deps/smallfunction.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys smallfun)
+if(use_sys)
   find_path(SMALLFUN_INCLUDE_DIR smallfun.hpp)
 endif()
 

diff --git a/cmake/deps/span.cmake b/cmake/deps/span.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys span)
+if(use_sys)
   find_package(span CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/spdlog.cmake b/cmake/deps/spdlog.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys spdlog)
+if(use_sys)
   if(NOT OSSIA_FMT_INTERNAL)
     find_package(spdlog CONFIG REQUIRED GLOBAL)
   endif()

diff --git a/cmake/deps/tuplet.cmake b/cmake/deps/tuplet.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys tuplet)
+if(use_sys)
   find_package(tuplet CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/unordered_dense.cmake b/cmake/deps/unordered_dense.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys unordered_dense)
+if(use_sys)
   find_package(unordered_dense CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/verdigris.cmake b/cmake/deps/verdigris.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys verdigris)
+if(use_sys)
   find_package(verdigris CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/websocketpp.cmake b/cmake/deps/websocketpp.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys websocketpp)
+if(use_sys)
   find_package(websocketpp CONFIG GLOBAL)
 endif()
 

diff --git a/cmake/deps/wiiuse.cmake b/cmake/deps/wiiuse.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys wiiuse)
+if(use_sys)
   find_library(WIIUSE_LIBRARY NAMES wiiuse)
   find_path(WIIUSE_INCLUDE_DIR wiiuse.h)
 

diff --git a/cmake/deps/zita-alsa-pcmi.cmake b/cmake/deps/zita-alsa-pcmi.cmake
@@ -1,4 +1,5 @@
-if(OSSIA_USE_SYSTEM_LIBRARIES)
+ossia_use_system(use_sys zita-alsa-pcmi)
+if(use_sys)
   find_path(ZITA_ALSA_PCMI_INCLUDE_DIR zita-alsa-pcmi.h)
   find_library(ZITA_ALSA_PCMI_LIBRARY zita-alsa-pcmi)
 

diff --git a/src/ossia_features.cmake b/src/ossia_features.cmake
@@ -140,7 +140,8 @@ endif()
 
 if(OSSIA_PROTOCOL_WIIMOTE)
   target_sources(ossia PRIVATE ${OSSIA_WIIMOTE_SRCS} ${OSSIA_WIIMOTE_HEADERS})
-  if(NOT OSSIA_USE_SYSTEM_LIBRARIES)
+  ossia_use_system(use_sys wiiuse)
+  if(NOT use_sys)
     target_include_directories(ossia PRIVATE "${WIIUSE_DIR}/src")
   endif()
   target_link_libraries(ossia PRIVATE $<BUILD_INTERFACE:wiiuse>)