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authorJia Tan <jiat0218@gmail.com>2023-07-19 23:36:00 +0800
committerJia Tan <jiat0218@gmail.com>2023-07-19 23:36:00 +0800
commit0184d344fa4f215cd345bb131db9068e077c69b8 (patch)
tree3059aa7744214e4a51dce1bca450a20446f731fc /src/liblzma/check
parentliblzma: Reword lzma_str_list_filters() documentation. (diff)
downloadxz-0184d344fa4f215cd345bb131db9068e077c69b8.tar.xz
liblzma: Suppress -Wunused-function warning.
Clang 16.0.0 and earlier have a bug that the ifunc resolver function triggers the -Wunused-function warning. The resolver function is static and only "used" by the __attribute__((__ifunc()__)). At this time, the bug is still unresolved, but has been reported: https://github.com/llvm/llvm-project/issues/63957 This is not a problem in GCC.
Diffstat (limited to 'src/liblzma/check')
-rw-r--r--src/liblzma/check/crc64_fast.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/liblzma/check/crc64_fast.c b/src/liblzma/check/crc64_fast.c
index e2d4ec3c..f6e872ed 100644
--- a/src/liblzma/check/crc64_fast.c
+++ b/src/liblzma/check/crc64_fast.c
@@ -441,6 +441,13 @@ is_clmul_supported(void)
typedef uint64_t (*crc64_func_type)(
const uint8_t *buf, size_t size, uint64_t crc);
+// Clang 16.0.0 and older has a bug where it marks the ifunc resolver
+// function as unused since it is static and never used outside of
+// __attribute__((__ifunc__())).
+#if defined(HAVE_FUNC_ATTRIBUTE_IFUNC) && defined(__clang__)
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wunused-function"
+#endif
static crc64_func_type
crc64_resolve(void)
@@ -448,6 +455,9 @@ crc64_resolve(void)
return is_clmul_supported() ? &crc64_clmul : &crc64_generic;
}
+#if defined(HAVE_FUNC_ATTRIBUTE_IFUNC) && defined(__clang__)
+# pragma GCC diagnostic pop
+#endif
#ifndef HAVE_FUNC_ATTRIBUTE_IFUNC