meson: Define _DARWIN_C_SOURCE on macOS as is done in Autotools

Signed-off-by: Jordan Williams <jordan@jwillikers.com>

diff --git a/meson.build b/meson.build
index 4d1aebeb9eec115d813f49e6cdd619aa582eed60..31bd60a2a763358cab2dd07b5cfe70be1f4dd418 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -41,6 +41,10 @@ vendordir = get_option('vendordir')
 
 add_project_arguments('-D_GNU_SOURCE', '-fsigned-char', language : 'c')
 
+if host_machine.system() == 'darwin'
+  add_project_arguments('-D_DARWIN_C_SOURCE', language : 'c')
+endif
+
 cc = meson.get_compiler('c')
 
 conf = configuration_data()