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