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build: update _XOPEN_SOURCE setting for modern Solaris & illumos

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Previously the build was requesting interfaces matching SUSv1/Unix95,
as implemented in Solaris 2.6 and later.  This changes it to try the
most recent version supported, and limits to the versions supported
by OS versions that meson supports.  This includes these _XOPEN_SOURCE
versions:

800 (2024): supported by illumos starting in July 2024
700 (2008): supported by Solaris 11.4 & illumos from 2014-2024
600 (2001): supported by Solaris 10-11.3 & illumos prior to 2014

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
This commit is contained in:
Alan Coopersmith 2024-10-14 17:19:16 -07:00
parent ef7b2c9a34
commit 5aabd288ad
1 changed files with 16 additions and 3 deletions
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19
meson.build
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@ -2483,10 +2483,23 @@ have_pkg_config = find_program('pkg-config', required: false).found()
# Some installed tests require a custom environment
env_program = find_program('env', required: installed_tests_enabled)
# FIXME: How to detect Solaris? https://github.com/mesonbuild/meson/issues/1578
# illumos & Solaris may need extra definitions to expose some SUS/POSIX
# interfaces in headers that conflict with previous Solaris headers.
# But if we define them to request an older version of the standards,
# we may hide things introduced in newer versions. We only check the
# versions that are supported on systems new enough that meson runs on them.
if host_system == 'sunos'
glib_conf.set('_XOPEN_SOURCE_EXTENDED', 1)
glib_conf.set('_XOPEN_SOURCE', 2)
xopen_test_code = '''#include <unistd.h>
#if _XOPEN_VERSION != _XOPEN_SOURCE
#error "XOPEN_SOURCE of _XOPEN_SOURCE not supported"
#endif'''
foreach std : ['800', '700', '600']
if cc.compiles(xopen_test_code, args: '-D_XOPEN_SOURCE=' + std, name: 'building with _XOPEN_SOURCE=' + std)
xopen_version = std
break
endif
endforeach
glib_conf.set('_XOPEN_SOURCE', xopen_version)
glib_conf.set('__EXTENSIONS__',1)
endif