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perf scripting perl: Force to use stdbool

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When building perf for arm64 I hit a warning (and be treated as an
error) like below:

 aarch64-oe-linux-gcc -o .../scripts/perl/Perf-Trace-Util/Context.o -c -Wbad-function-cast \
         ... scripts/perl/Perf-Trace-Util/Context.c

 In file included from .../usr/lib64/perl/5.14.3/CORE/perl.h:2464:0,
                  from Context.xs:23:
 /.../usr/lib64/perl/5.14.3/CORE/handy.h:108:0: error: "bool" redefined [-Werror]
  #  define bool char
  ^
 In file included from /.../usr/src/kernel/tools/include/linux/types.h:4:0,
                  from /.../usr/src/kernel/arch/arm64/include/uapi/asm/sigcontext.h:19,
		  from /.../usr/include/bits/sigcontext.h:27,
		  from /.../usr/include/signal.h:340,
		  from /.../usr/include/sys/param.h:28,
		  from /.../usr/lib64/perl/5.14.3/CORE/perl.h:678,
		  from Context.xs:23:
  /.../usr/lib/aarch64-oe-linux/gcc/aarch64-oe-linux/4.9.2/include/stdbool.h:33:0: note: this is the location of the previous definition
    #define bool _Bool

Looks like the failure is caused by arm64 uapi/asm/sigcontext.h, which
includes linux/types.h while other archs not.

Current perl consider this problem:

bd31be4baa

However there are users which use old version of perl.

This patch includes stdbool.h before Context.xs and define HAS_BOOL to
prevent perl'e headers define its own 'bool'. Code is learn from perl's
git tree.

Signed-off-by: Wang Nan <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Acked-by: Namhyung Kim <[email protected]>
Cc: Li Zefan <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Wang Nan 2015-01-19 20:43:17 +08:00 • committed by Arnaldo Carvalho de Melo
commit 75e0b5f010
1 changed files with 4 additions and 1 deletions
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5
tools/perf/scripts/perl/Perf-Trace-Util/Context.c
View file

@ -5,7 +5,10 @@
* ANY CHANGES MADE HERE WILL BE LOST!
*
*/
#include <stdbool.h>
#ifndef HAS_BOOL
# define HAS_BOOL 1
#endif
#line 1 "Context.xs"
/*
* Context.xs. XS interfaces for perf script.