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liblzma: Update a comment.

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The C standards don't allow an empty translation unit which can be
avoided by declaring something, without exporting any symbols.

When I committed f644473a21 I had
a feeling that some specific toolchain somewhere didn't like
empty object files (assembler or maybe "ar" complained) but
I cannot find anything to confirm this now. Quite likely I
remembered nonsense. I leave this here as a note to my future self. :-)
This commit is contained in:
Lasse Collin 2023-09-26 21:47:13 +03:00
parent 8ebaf3f665
commit 5a9af95f85
1 changed files with 1 additions and 2 deletions
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src/liblzma/check/crc64_table.c
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@ -18,8 +18,7 @@
#if (defined(__x86_64__) && defined(__SSSE3__) \ #if (defined(__x86_64__) && defined(__SSSE3__) \
&& defined(__SSE4_1__) && defined(__PCLMUL__)) \ && defined(__SSE4_1__) && defined(__PCLMUL__)) \
|| (defined(__e2k__) && __iset__ >= 6) || (defined(__e2k__) && __iset__ >= 6)
// No table needed but something has to be exported to keep some toolchains // No table needed. Use a typedef to avoid an empty translation unit.
// happy. Also use a declaration to silence compiler warnings.
typedef void lzma_crc64_dummy; typedef void lzma_crc64_dummy;
#else #else