From: Jia Tan <jiat0218@gmail.com>
Date: Tue, 26 Sep 2023 16:02:11 +0000 (+0800)
Subject: liblzma: Avoid compiler warning without creating extra symbol.
X-Git-Tag: v5.5.1alpha~146
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8ebaf3f665ddc7e4f19c613005050dde5ccbe499;p=thirdparty%2Fxz.git

liblzma: Avoid compiler warning without creating extra symbol.

When the generic fast crc64 method is used, then we omit
lzma_crc64_table[][]. Similar to
d9166b52cf3458a4da3eb92224837ca8fc208d79, we can avoid compiler warnings
with -Wempty-translation-unit (Clang) or -pedantic (GCC) by creating a
never used typedef instead of an extra symbol.
---

diff --git a/src/liblzma/check/crc64_table.c b/src/liblzma/check/crc64_table.c
index 241adcd4..6f9adb04 100644
--- a/src/liblzma/check/crc64_table.c
+++ b/src/liblzma/check/crc64_table.c
@@ -20,8 +20,7 @@
 		|| (defined(__e2k__) && __iset__ >= 6)
 // No table needed but something has to be exported to keep some toolchains
 // happy. Also use a declaration to silence compiler warnings.
-extern const char lzma_crc64_dummy;
-const char lzma_crc64_dummy;
+typedef void lzma_crc64_dummy;
 
 #else
 // Having the declaration here silences clang -Wmissing-variable-declarations.