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scanner: Reverse expat/libxml include order

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libxml2 unconditonally defines XMLCALL to nothing. Expat does not
redefine XMLCALL if it is already defined, but if it is not, and we are
building with gcc on i386 (not x86-64), it will define it as 'cdecl'.

Including Expat before libxml thus results in a warning about XMLCALL
being redefined. Luckily we can get around this by just reversing the
include order: cdecl is a no-op on Unix-like systems, so by having
libxml first define XMLCALL to nothing and including Expat afterwards,
we avoid the warning and lose nothing.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Daniel Stone 2018-08-28 23:59:35 +01:00
parent 5fab243a72
commit 4939923d3a
1 changed files with 4 additions and 1 deletions
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5
src/scanner.c
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@ -35,7 +35,6 @@
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <expat.h>
#include <getopt.h>
#include <limits.h>
#include <unistd.h>
@ -48,6 +47,10 @@ extern char DTD_DATA_begin;
extern int DTD_DATA_len;
#endif
/* Expat must be included after libxml as both want to declare XMLCALL; see
* the Git commit that 'git blame' for this comment points to for more. */
#include <expat.h>
#include "wayland-util.h"
#define PROGRAM_NAME "wayland-scanner"