Fix compile time warning messages about variables being used before they are initialised.

	PR 18313
bin	* ieee.c (ieee_read_cxx_class): Initialise the varargs variable.
	* readelf.c (uncompress_section_contents): Zero initialise the
	zstream structure.

bfd	* compress.c (decompress_contents): Zero initialse the z_stream
	structure.

1 files changed, 6 insertions, 3 deletions

diff --git a/bfd/compress.c b/bfd/compress.c
index d0f745f..07289e5 100644
--- a/bfd/compress.c
+++ b/bfd/compress.c
@@ -37,9 +37,12 @@ decompress_contents (bfd_byte *compressed_buffer,
 
   /* It is possible the section consists of several compressed
      buffers concatenated together, so we uncompress in a loop.  */
-  strm.zalloc = NULL;
-  strm.zfree = NULL;
-  strm.opaque = NULL;
+  /* PR 18313: The state field in the z_stream structure is supposed
+     to be invisible to the user (ie us), but some compilers will
+     still complain about it being used without initialisation.  So
+     we first zero the entire z_stream structure and then set the fields
+     that we need.  */
+  memset (& strm, 0, sizeof strm);
   strm.avail_in = compressed_size - 12;
   strm.next_in = (Bytef*) compressed_buffer + 12;
   strm.avail_out = uncompressed_size;