libvmaf: use _XOPEN_SOURCE, not _POSIX_C_SOURCE

On BSD operating systems (I tested FreeBSD and NetBSD), with _POSIX_C_SOURCE=200112L, M_PI (needed by src/feature/ciede.c) is not exposed. _XOPEN_SOURCE=600 exposes a superset of _POSIX_C_SOURCE=200112L, including M_PI.
Netflix · Jan 24, 2023 · f47640f · f47640f
1 parent b9150a2
commit f47640f
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/libvmaf/meson.build b/libvmaf/meson.build
@@ -27,8 +27,8 @@ elif host_machine.system() == 'darwin'
     test_args += '-D_DARWIN_C_SOURCE'
     add_project_arguments('-D_DARWIN_C_SOURCE', language: 'c')
 else
-    test_args += '-D_POSIX_C_SOURCE=200112L'
-    add_project_arguments('-D_POSIX_C_SOURCE=200112L', language: 'c')
+    test_args += '-D_XOPEN_SOURCE=600'
+    add_project_arguments('-D_XOPEN_SOURCE=600', language: 'c')
 endif
 
 # Header checks