Define _GNU_SOURCE in config.h

Same way as libusb/autotools does it.
libusb · Dec 25, 2023 · ab32b4b · ab32b4b
1 parent 84fb1bb
commit ab32b4b
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -71,6 +71,9 @@ function(generate_config_file)
     endif()
 
     file(MAKE_DIRECTORY "${LIBUSB_GEN_INCLUDES}")
+    if(NOT MSVC)
+        set(_GNU_SOURCE TRUE)
+    endif()
     configure_file(config.h.in "${LIBUSB_GEN_INCLUDES}/config.h" @ONLY)
 endfunction()