[PATCH] iconv: Avoid writable data and relocations in IBM charsets

[Florian Weimer]

The IBM930, IBM933, IBM935 and IBM939 converters defined lookup
tables which were not constant.  They also contained an
unnecessary pointer indirection.

2016-10-26  Florian Weimer  <fweimer@redhat.com>

	* iconvdata/ibm930.h (__ucs4_to_ibm930sb): Switch from writable
	array of string pointers to constant array of two-character
	arrays.
	* iconvdata/ibm933.h (__ucs4_to_ibm933sb): Likewise.
	* iconvdata/ibm935.h (__ucs4_to_ibm935sb): Likewise.
	* iconvdata/ibm939.h (__ucs4_to_ibm939sb): Likewise.

diff --git a/iconvdata/ibm930.h b/iconvdata/ibm930.h
index 1afda56..1f2d87d 100644
--- a/iconvdata/ibm930.h
+++ b/iconvdata/ibm930.h
@@ -1499,7 +1499,7 @@ static const struct gap __ucs4_to_ibm930sb_idx[] =
   { .start = 0xffff, .end = 0xffff, .idx =      0 }
 };
 
-static const char * __ucs4_to_ibm930sb[] =
+static const char __ucs4_to_ibm930sb[][2] =
 {
   "\x00", "\x01", "\x02", "\x03", "\x37", "\x2d", "\x2e", "\x2f", "\x16",
   "\x05", "\x25", "\x0b", "\x0c", "\x0d", "\x3f", "\x3f", "\x10", "\x11",
diff --git a/iconvdata/ibm933.h b/iconvdata/ibm933.h
index cb00137..4b9317a 100644
--- a/iconvdata/ibm933.h
+++ b/iconvdata/ibm933.h
@@ -3371,7 +3371,7 @@ static const struct gap __ucs4_to_ibm933sb_idx[] =
   { .start = 0xffff, .end = 0xffff, .idx =      0 }
 };
 
-static const char *__ucs4_to_ibm933sb[] =
+static const char __ucs4_to_ibm933sb[][2] =
 {
   "\x00", "\x01", "\x02", "\x03", "\x37", "\x2d", "\x2e", "\x2f", "\x16",
   "\x05", "\x25", "\x0b", "\x0c", "\x0d", "\x3f", "\x3f", "\x10", "\x11",
diff --git a/iconvdata/ibm935.h b/iconvdata/ibm935.h
index f7a96e9..b178f59 100644
--- a/iconvdata/ibm935.h
+++ b/iconvdata/ibm935.h
@@ -1282,7 +1282,7 @@ static const struct gap __ucs4_to_ibm935sb_idx[] =
   { .start = 0xffff, .end = 0xffff, .idx =     0 }
 };
 
-static const char *__ucs4_to_ibm935sb[] =
+static const char __ucs4_to_ibm935sb[][2] =
 {
   "\x00", "\x01", "\x02", "\x03", "\x37", "\x2d", "\x2e", "\x2f", "\x16",
   "\x05", "\x25", "\x0b", "\x0c", "\x0d", "\x3f", "\x3f", "\x10", "\x11",
diff --git a/iconvdata/ibm939.h b/iconvdata/ibm939.h
index bb8a8de..a9d8bf8 100644
--- a/iconvdata/ibm939.h
+++ b/iconvdata/ibm939.h
@@ -1499,7 +1499,7 @@ static const struct gap __ucs4_to_ibm939sb_idx[] =
   { .start = 0xffff, .end = 0xffff, .idx =      0 }
 };
 
-static const char * __ucs4_to_ibm939sb[] =
+static const char __ucs4_to_ibm939sb[][2] =
 {
   "\x00", "\x01", "\x02", "\x03", "\x37", "\x2d", "\x2e", "\x2f", "\x16",
   "\x05", "\x25", "\x0b", "\x0c", "\x0d", "\x3f", "\x3f", "\x10", "\x11",