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Fix sparc64 build with GCC 9.

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Similar to the x86_64 and armv7 build issues, glibc fails to build for
sparc64 with current mainline GCC because of aliases declared in the
course of defining IFUNCs, which copy their attributes from a header
declaration, ending up with fewer attributes than the (built-in)
string function they alias.  This patch fixes the issue similarly to
the fixes for those other architectures.

Tested with build-many-glibcs.py compilers build for
sparc64-linux-gnu.

	* sysdeps/sparc/sparc-ifunc.h [SHARED]
	(sparc_ifunc_redirected_hidden_def): Use __attribute_copy__ to
	copy attributes from name.
This commit is contained in:
Joseph Myers 2018-11-13 00:27:06 +00:00
parent f578f97b97
commit 53f5c65914
2 changed files with 8 additions and 1 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2018-11-13 Joseph Myers <joseph@codesourcery.com>
* sysdeps/sparc/sparc-ifunc.h [SHARED]
(sparc_ifunc_redirected_hidden_def): Use __attribute_copy__ to
copy attributes from name.
2018-11-12 Joseph Myers <joseph@codesourcery.com>
* sysdeps/arm/arm-ifunc.h [SHARED] (arm_libc_ifunc_hidden_def):

3
sysdeps/sparc/sparc-ifunc.h
View File

@ -35,7 +35,8 @@
#if defined SHARED
# define sparc_ifunc_redirected_hidden_def(redirect_name, name) \
__hidden_ver1 (name, __GI_##name, redirect_name) \
__attribute__ ((visibility ("hidden")));
__attribute__ ((visibility ("hidden"))) \
__attribute_copy__ (name);
#else
# define sparc_ifunc_redirected_hidden_def(redirect_name, name)
#endif