--- blosc2/CMakeLists.txt	2024-01-25 19:05:45.000000000 +0800
+++ blosc2/CMakeLists.txt	2024-11-08 16:08:30.000000000 +0800
@@ -5,6 +5,7 @@
     set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake")
     find_package(PkgConfig REQUIRED)
     pkg_check_modules(Blosc2 REQUIRED IMPORTED_TARGET blosc2)
+    target_compile_options(blosc2_ext PRIVATE "-std=gnu99")
     target_link_libraries(blosc2_ext PkgConfig::Blosc2)
 else()
     set(STATIC_LIB ON CACHE BOOL "Build a static version of the blosc library.")