squashfs: Fix compile with GCC 10

Fixes the following build error with GCC 10:
	/usr/bin/ld: read_fs.o:(.bss+0x0): multiple definition of `swap'; mksquashfs.o:(.bss+0x1b2a88): first defined here
And a compile warning.

Fixes: FS#3104, FS#3119
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(cherry picked from commit 1bbc1aa884902fd05cc579b53d68b2ba0b18683f)

diff --git a/tools/squashfs/patches/140-gcc-10-fix.patch b/tools/squashfs/patches/140-gcc-10-fix.patch
new file mode 100644 (file)
index 0000000..a02641f
--- /dev/null
+++ b/tools/squashfs/patches/140-gcc-10-fix.patch
@@ -0,0 +1,25 @@
+Fixes the following build error with GCC 10:
+       /usr/bin/ld: read_fs.o:(.bss+0x0): multiple definition of `swap'; mksquashfs.o:(.bss+0x1b2a88): first defined here
+And a compile warning.
+
+--- a/squashfs-tools/read_fs.c
++++ b/squashfs-tools/read_fs.c
+@@ -61,7 +61,7 @@ extern int add_file(long long, long long
+                                               fprintf(stderr, s, ## args); \
+                                       } while(0)
+ 
+-int swap;
++static int swap;
+ 
+ int read_block(int fd, long long start, long long *next, unsigned char *block, squashfs_super_block *sBlk)
+ {
+--- a/squashfs-tools/mksquashfs.c
++++ b/squashfs-tools/mksquashfs.c
+@@ -258,6 +258,7 @@ int read_sort_file(char *filename, int s
+ void sort_files_and_write(struct dir_info *dir);
+ struct file_info *duplicate(char *(get_next_file_block)(struct duplicate_buffer_handle *, unsigned int), struct duplicate_buffer_handle *file_start, long long bytes, unsigned int **block_list, long long *start, int blocks, struct fragment **fragment, char *frag_data, int frag_bytes);
+ struct dir_info *dir_scan1(char *, int (_readdir)(char *, char *, struct dir_info *));
++int dir_scan2(squashfs_inode *inode, struct dir_info *dir_info);
+ 
+ #define MKINODE(A)    ((squashfs_inode)(((squashfs_inode) inode_bytes << 16) + (((char *)A) - data_cache)))
+