tools/squashfskit4/patches/0002-fix-build-failure-against-gcc-10.patch

   1 From fe2f5da4b0f8994169c53e84b7cb8a0feefc97b5 Mon Sep 17 00:00:00 2001
   2 From: Sergei Trofimovich <slyfox@gentoo.org>
   3 Date: Sun, 26 Jan 2020 18:35:13 +0000
   4 Subject: [PATCH] squashfs-tools: fix build failure against gcc-10
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 On gcc-10 (and gcc-9 -fno-common) build fails as:
  10
  11 ```
  12 cc ... -o mksquashfs
  13 ld: read_fs.o:(.bss+0x0):
  14   multiple definition of `fwriter_buffer'; mksquashfs.o:(.bss+0x400c90): first defined here
  15 ld: read_fs.o:(.bss+0x8):
  16   multiple definition of `bwriter_buffer'; mksquashfs.o:(.bss+0x400c98): first defined here
  17 ```
  18
  19 gcc-10 will change the default from -fcommon to fno-common:
  20 https://gcc.gnu.org/PR85678.
  21
  22 The error also happens if CFLAGS=-fno-common passed explicitly.
  23
  24 Reported-by: Toralf Förster
  25 Bug: https://bugs.gentoo.org/706456
  26 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
  27 ---
  28  squashfs-tools/mksquashfs.h | 2 +-
  29  1 file changed, 1 insertion(+), 1 deletion(-)
  30
  31 diff --git a/squashfs-tools/mksquashfs.h b/squashfs-tools/mksquashfs.h
  32 index 1beefef7..b6503063 100644
  33 --- a/squashfs-tools/mksquashfs.h
  34 +++ b/squashfs-tools/mksquashfs.h
  35 @@ -143,7 +143,7 @@ struct append_file {
  36  #endif
  37
  38  extern struct cache *reader_buffer, *fragment_buffer, *reserve_cache;
  39 -struct cache *bwriter_buffer, *fwriter_buffer;
  40 +extern struct cache *bwriter_buffer, *fwriter_buffer;
  41  extern struct queue *to_reader, *to_deflate, *to_writer, *from_writer,
  42         *to_frag, *locked_fragment, *to_process_frag;
  43  extern struct append_file **file_mapping;