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From 79df4db3fd122f5040bdf2225c3047375de3b0d2 Mon Sep 17 00:00:00 2001
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From: Filipe Brandenburger <filbranden@google.com>
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Date: Sun, 15 Jul 2018 22:43:35 -0700
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Subject: [PATCH] build-sys: Detect whether struct statx is defined in
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sys/stat.h
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Starting with glibc 2.27.9000-36.fc29, include file sys/stat.h will have a
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definition for struct statx, in which case include file linux/stat.h should be
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avoided, in order to prevent a duplicate definition.
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In file included from ../src/basic/missing.h:18,
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from ../src/basic/util.h:28,
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from ../src/basic/hashmap.h:10,
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from ../src/shared/bus-util.h:12,
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from ../src/libsystemd/sd-bus/bus-creds.c:11:
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/usr/include/linux/stat.h:99:8: error: redefinition of ‘struct statx’
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struct statx {
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^~~~~
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In file included from /usr/include/sys/stat.h:446,
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from ../src/basic/util.h:19,
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from ../src/basic/hashmap.h:10,
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from ../src/shared/bus-util.h:12,
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from ../src/libsystemd/sd-bus/bus-creds.c:11:
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/usr/include/bits/statx.h:36:8: note: originally defined here
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struct statx
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^~~~~
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Extend our meson.build to look for struct statx when only sys/stat.h is
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included and, in that case, do not include linux/stat.h anymore.
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Tested that systemd builds correctly when using a glibc version that includes a
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definition for struct statx.
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glibc Fedora RPM update:
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https://src.fedoraproject.org/rpms/glibc/c/28cb5d31fc1e5887912283c889689c47076278ae
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glibc upstream commit:
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https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=fd70af45528d59a00eb3190ef6706cb299488fcd
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---
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meson.build | 5 +++++
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src/basic/missing.h | 5 ++++-
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src/basic/xattr-util.c | 1 -
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3 files changed, 9 insertions(+), 2 deletions(-)
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diff --git a/meson.build b/meson.build
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index 04331dd41..a0e724070 100644
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--- a/meson.build
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+++ b/meson.build
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@@ -425,6 +425,7 @@ decl_headers = '''
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#include <sys/stat.h>
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'''
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# FIXME: key_serial_t is only defined in keyutils.h, this is bound to fail
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+# FIXME: these should use -D_GNU_SOURCE, since that is defined at build time
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foreach decl : ['char16_t',
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'char32_t',
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@@ -439,6 +440,10 @@ foreach decl : ['char16_t',
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conf.set10('HAVE_' + decl.underscorify().to_upper(), have)
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endforeach
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+conf.set10('HAVE_STRUCT_STATX_IN_SYS_STAT_H', cc.sizeof('struct statx', prefix : '''
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+#include <sys/stat.h>
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+''', args : '-D_GNU_SOURCE') > 0)
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+
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foreach decl : [['IFLA_INET6_ADDR_GEN_MODE', 'linux/if_link.h'],
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['IN6_ADDR_GEN_MODE_STABLE_PRIVACY', 'linux/if_link.h'],
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['IFLA_VRF_TABLE', 'linux/if_link.h'],
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diff --git a/src/basic/missing.h b/src/basic/missing.h
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index 71a07d057..14ad3d491 100644
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--- a/src/basic/missing.h
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+++ b/src/basic/missing.h
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@@ -15,7 +15,6 @@
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#include <linux/neighbour.h>
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#include <linux/oom.h>
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#include <linux/rtnetlink.h>
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-#include <linux/stat.h>
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#include <net/ethernet.h>
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#include <stdlib.h>
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#include <sys/resource.h>
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@@ -25,6 +24,10 @@
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#include <uchar.h>
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#include <unistd.h>
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+#if !HAVE_STRUCT_STATX_IN_SYS_STAT_H
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+#include <linux/stat.h>
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+#endif
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+
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#if HAVE_AUDIT
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#include <libaudit.h>
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#endif
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diff --git a/src/basic/xattr-util.c b/src/basic/xattr-util.c
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index c5c55ea84..0ee097983 100644
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--- a/src/basic/xattr-util.c
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+++ b/src/basic/xattr-util.c
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@@ -2,7 +2,6 @@
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#include <errno.h>
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#include <fcntl.h>
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-#include <linux/stat.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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