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[PATCH] Don't add hidden symbols into static binaries

• From: Siddhesh Poyarekar <siddhesh at sourceware dot org>
• To: libc-alpha at sourceware dot org
• Date: Fri, 11 Aug 2017 12:39:52 +0530
• Subject: [PATCH] Don't add hidden symbols into static binaries
• Authentication-results: sourceware.org; auth=none

The __GI_* symbol aliases for __memcpy_generic are unnecessary sincethey're never used.  Add them only for libc.so to avoid PLT.  Maybesome time in future we need to evaluate the relative cost of PLT vsgains from multiarch memcpy implementations and take a call on whetherto drop this completely.* sysdeps/aarch64/multiarch/memcpy_generic.S (__GI_memcpy):Define only for libc.so.--- sysdeps/aarch64/multiarch/memcpy_generic.S | 2 ++ 1 file changed, 2 insertions(+)diff --git a/sysdeps/aarch64/multiarch/memcpy_generic.S b/sysdeps/aarch64/multiarch/memcpy_generic.Sindex 041a779..edb2e52 100644--- a/sysdeps/aarch64/multiarch/memcpy_generic.S+++ b/sysdeps/aarch64/multiarch/memcpy_generic.S@@ -33,9 +33,11 @@ # undef libc_hidden_builtin_def # define libc_hidden_builtin_def(name) +# ifdef SHARED /* It doesn't make sense to send libc-internal memcpy calls through a PLT. */ .globl __GI_memcpy; __GI_memcpy = __memcpy_generic .globl __GI_memmove; __GI_memmove = __memmove_generic+# endif  #endif -- 2.7.4