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build: make C11 atomics mandatory

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The emulation is pretty bad, and C11 compilers are everywhere now. It's
time to retire the emulation, which was always meant as temporary hack
for transition.

In theory, a user can still use --disable-stdatomic to enable the
emulation code, but that's sort of hidden. Actual support will be
removed after the next release or so.
This commit is contained in:
wm4 2020-03-12 12:52:51 +01:00
parent 5105a3b05a
commit 06718da79c
1 changed files with 5 additions and 14 deletions
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19
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@ -206,27 +206,19 @@ main_dependencies = [
'req': True,
'fmsg': 'Unable to find pthreads support.'
}, {
'name': 'gnuc',
'desc': 'GNU C extensions',
'func': check_statement([], "__GNUC__"),
}, {
'name': 'stdatomic',
'desc': 'stdatomic.h',
'name': '--stdatomic',
'desc': 'C11 stdatomic.h',
'func': check_libs(['atomic'],
check_statement('stdatomic.h',
'atomic_int_least64_t test = ATOMIC_VAR_INIT(123);'
'atomic_fetch_add(&test, 1)'))
'atomic_fetch_add(&test, 1)')),
'req': True,
'fmsg': 'C11 atomics are required; you may need a newer compiler',
}, {
# C11; technically we require C11, but aligned_alloc() is not in MinGW
'name': 'aligned_alloc',
'desc': 'C11 aligned_alloc()',
'func': check_statement('stdlib.h', 'aligned_alloc(1, 1)'),
}, {
'name': 'atomics',
'desc': 'stdatomic.h support or slow emulation',
'func': check_true,
'req': True,
'deps': 'stdatomic || gnuc',
}, {
'name': 'librt',
'desc': 'linking with -lrt',
@ -500,7 +492,6 @@ audio_output_features = [
}, {
'name': '--audiounit',
'desc': 'AudioUnit output for iOS',
'deps': 'atomics',
'func': check_cc(
fragment=load_fragment('audiounit.c'),
framework_name=['Foundation', 'AudioToolbox'])