From 842093bb843ae6c719c2b1cf32eb749cab9e46ca Mon Sep 17 00:00:00 2001
From: Simon Ser <contact@emersion.fr>
Date: Thu, 15 Feb 2024 15:34:49 +0100
Subject: Define _POSIX_C_SOURCE globally

Stop trying to maintain a per-file _POSIX_C_SOURCE. Instead,
require POSIX.1-2008 globally. A lot of core source files depend
on that already.

Some care must be taken on a few select files where we need a bit
more than POSIX. Some files need XSI extensions (_XOPEN_SOURCE) and
some files need BSD extensions (_DEFAULT_SOURCE). In both cases,
these feature test macros imply _POSIX_C_SOURCE. Make sure to not
define both these macros and _POSIX_C_SOURCE explicitly to avoid
POSIX requirement conflicts (e.g. _POSIX_C_SOURCE says POSIX.1-2001
but _XOPEN_SOURCE says POSIX.1-2008).

Additionally, there is one special case in render/vulkan/vulkan.c.
That file needs major()/minor(), and these are system-specific.
On FreeBSD, _POSIX_C_SOURCE hides system-specific symbols so we need
to make sure it's not defined for this file. On Linux, we can
explicitly include <sys/sysmacros.h> and ensure that apart from
symbols defined there the file only uses POSIX toys.
---
 render/allocator/allocator.c | 1 -
 render/allocator/drm_dumb.c  | 1 -
 render/allocator/gbm.c       | 1 -
 3 files changed, 3 deletions(-)

(limited to 'render/allocator')

diff --git a/render/allocator/allocator.c b/render/allocator/allocator.c
index e0620a1b..639b52be 100644
--- a/render/allocator/allocator.c
+++ b/render/allocator/allocator.c
@@ -1,4 +1,3 @@
-#define _POSIX_C_SOURCE 200809L
 #include <assert.h>
 #include <fcntl.h>
 #include <stdlib.h>
diff --git a/render/allocator/drm_dumb.c b/render/allocator/drm_dumb.c
index 6de44f40..eb4ce99f 100644
--- a/render/allocator/drm_dumb.c
+++ b/render/allocator/drm_dumb.c
@@ -1,4 +1,3 @@
-#define _POSIX_C_SOURCE 200809L
 
 #include <assert.h>
 #include <drm_fourcc.h>
diff --git a/render/allocator/gbm.c b/render/allocator/gbm.c
index 25ddbbae..baa0fb6e 100644
--- a/render/allocator/gbm.c
+++ b/render/allocator/gbm.c
@@ -1,4 +1,3 @@
-#define _POSIX_C_SOURCE 200809L
 #include <assert.h>
 #include <drm_fourcc.h>
 #include <fcntl.h>
-- 
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