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build: don't rely on implicit GNU extensions

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Currently libwayland assumes GNU extensions will be available, but
doesn't define the C standard to use. Instead, let's unconditionally
enable POSIX extensions, and enable GNU extensions on a case-by-case
basis as needed.

Signed-off-by: Simon Ser <contact@emersion.fr>
This commit is contained in:
Simon Ser 2022-01-10 14:51:55 +01:00
parent 65616e946b
commit 0d314c4a04
5 changed files with 12 additions and 2 deletions
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1
cursor/xcursor.c
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@ -23,6 +23,7 @@
* SOFTWARE.
*/
#define _GNU_SOURCE
#include "xcursor.h"
#include <stdio.h>
#include <stdlib.h>

10
meson.build
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@ -14,6 +14,12 @@ config_h = configuration_data()
config_h.set_quoted('PACKAGE', meson.project_name())
config_h.set_quoted('PACKAGE_VERSION', meson.project_version())
cc_args = []
if host_machine.system() != 'freebsd'
cc_args += ['-D_POSIX_C_SOURCE=200809L']
endif
add_project_arguments(cc_args, language: 'c')
compiler_flags = [
'-Wno-unused-parameter',
'-Wstrict-prototypes',
@ -79,7 +85,7 @@ if get_option('libraries')
]
foreach d: decls
if not cc.has_header_symbol(d['header'], d['symbol'], dependencies: epoll_dep)
if not cc.has_header_symbol(d['header'], d['symbol'], dependencies: epoll_dep, args: cc_args)
error('@0@ is needed to compile Wayland libraries'.format(d['symbol']))
endif
endforeach
@ -87,7 +93,7 @@ if get_option('libraries')
rt_dep = []
if not cc.has_function('clock_gettime', prefix: '#include <time.h>')
rt_dep = cc.find_library('rt')
if not cc.has_function('clock_gettime', prefix: '#include <time.h>', dependencies: rt_dep)
if not cc.has_function('clock_gettime', prefix: '#include <time.h>', dependencies: rt_dep, args: cc_args)
error('clock_gettime not found')
endif
endif

1
tests/display-test.c
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@ -24,6 +24,7 @@
* SOFTWARE.
*/
#define _GNU_SOURCE
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>

1
tests/event-loop-test.c
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@ -24,6 +24,7 @@
* SOFTWARE.
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdint.h>
#include <assert.h>

1
tests/fixed-test.c
View File

@ -23,6 +23,7 @@
* SOFTWARE.
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>