Re: [libvirt PATCH 020/351] meson: add manywarnings

Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com&gt; --- m4/virt-manywarnings.m4 | 339 ---------------------------------------- meson.build | 192 +++++++++++++++++++++++ 2 files changed, 192 insertions(+), 339 deletions(-) delete mode 100644 m4/virt-manywarnings.m4

+# gcc --help=warnings outputs +ptrdiff_max = cc.sizeof('ptrdiff_t', prefix: '#include <stddef.h>') +size_max = cc.sizeof('size_t', prefix: '#include <stdint.h>') +# Compute max safe object size by checking ptrdiff_t and size_t sizes. +# Ideally we would get PTRDIFF_MAX and SIZE_MAX values but it would +# give us (2147483647L) and we would have to remove the () and the suffix +# in order to convert it to numbers to be able to pick the smaller one. +alloc_max = run_command( + 'python3', '-c', + 'print(min(2**@0@ - 1, 2**@1@ - 1))'.format(ptrdiff_max * 8 - 1, size_max * 8), +)