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authorAurelien Jarno <aurelien@aurel32.net>2016-11-06 21:33:10 +0100
committerAurelien Jarno <aurelien@aurel32.net>2016-11-06 21:33:10 +0100
commit0623b9e6a9c3441427cf8c421bcc81d09e48fdc1 (patch)
tree563ab69383661427f9dc90a95f29befd96976692 /iconv
parent31c351e26de7218e1c0c29612c17ed829f171588 (diff)
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gconv.h: fix build with GCC 7
gconv.h is using a flex array to define the __gconv_info member in an
invalid way, causing GCC 7 to issue an error:

| In file included from ../include/gconv.h:1:0,
|                  from ../sysdeps/unix/sysv/linux/_G_config.h:32,
|                  from ../libio/libio.h:31,
|                  from ../include/libio.h:4,
|                  from ../libio/stdio.h:74,
|                  from ../include/stdio.h:5,
|                  from test-math-isinff.cc:22:
| ../iconv/gconv.h:142:50: error: flexible array member '__gconv_info::__data' not at end of 'struct _IO_codecvt'
| In file included from ../include/libio.h:4:0,
|                  from ../libio/stdio.h:74,
|                  from ../include/stdio.h:5,
|                  from test-math-isinff.cc:22:
| ../libio/libio.h:211:14: note: next member '_G_iconv_t _IO_codecvt::__cd_out' declared here
| ../libio/libio.h:187:8: note: in the definition of 'struct _IO_codecvt'
| In file included from ../include/gconv.h:1:0,
|                  from ../sysdeps/unix/sysv/linux/_G_config.h:32,
|                  from ../libio/libio.h:31,
|                  from ../include/libio.h:4,
|                  from ../libio/stdio.h:74,
|                  from ../include/stdio.h:5,
|                  from test-math-isinff.cc:22:
| ../iconv/gconv.h:142:50: error: flexible array member '__gconv_info::__data' not at end of 'struct _IO_wide_data'
| In file included from ../include/libio.h:4:0,
|                  from ../libio/stdio.h:74,
|                  from ../include/stdio.h:5,
|                  from test-math-isinff.cc:22:
| ../libio/libio.h:211:14: note: next member '_G_iconv_t _IO_codecvt::__cd_out' declared here
| ../libio/libio.h:215:8: note: in the definition of 'struct _IO_wide_data'

This is basically a revert to the code from 15 years ago. More details
are available in the GCC bug:
  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78039

Changelog:
	* iconv/gconv.h (__gconv_info): Define __data element using a
	zero-length array.
Diffstat (limited to 'iconv')
-rw-r--r--iconv/gconv.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/iconv/gconv.h b/iconv/gconv.h
index 8d8ce5813b..a87028047b 100644
--- a/iconv/gconv.h
+++ b/iconv/gconv.h
@@ -139,7 +139,7 @@ typedef struct __gconv_info
 {
   size_t __nsteps;
   struct __gconv_step *__steps;
-  __extension__ struct __gconv_step_data __data __flexarr;
+  __extension__ struct __gconv_step_data __data[0];
 } *__gconv_t;
 
 /* Transliteration using the locale's data.  */