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tools/elfutils: use weak alias over no alias for macOS

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Clang has support for weak aliases
despite no support for strong aliases,
but it only works with the #pragma directive.

Implementing weak aliases instead of none
is likely a more upstream-friendly solution
for supporting building on other platforms.

Signed-off-by: Michael Pratt <mcpratt@pm.me>
Link: https://github.com/openwrt/openwrt/pull/15690
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Michael Pratt 2024-06-10 23:59:10 -04:00 committed by Robert Marko
parent 52a5344501
commit e4fb7c9544
1 changed files with 5 additions and 4 deletions
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9
tools/elfutils/patches/100-portability.patch
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@ -34,7 +34,7 @@
LIBS="$saved_LIBS" LIBS="$saved_LIBS"
--- a/lib/eu-config.h --- a/lib/eu-config.h
+++ b/lib/eu-config.h +++ b/lib/eu-config.h
@@ -59,14 +59,18 @@ @@ -59,14 +59,19 @@
# define once(once_control, init_routine) init_routine() # define once(once_control, init_routine) init_routine()
#endif /* USE_LOCKS */ #endif /* USE_LOCKS */
@ -45,8 +45,9 @@
#define _(Str) dgettext ("elfutils", Str) #define _(Str) dgettext ("elfutils", Str)
/* Compiler-specific definitions. */ /* Compiler-specific definitions. */
+#define __PRAGMA(str) _Pragma (#str)
+#ifdef __APPLE__ +#ifdef __APPLE__
+#define strong_alias(name, aliasname) +#define strong_alias(name, aliasname) __PRAGMA(weak aliasname = name)
+#else +#else
#define strong_alias(name, aliasname) \ #define strong_alias(name, aliasname) \
extern __typeof (name) aliasname __attribute__ ((alias (#name))); extern __typeof (name) aliasname __attribute__ ((alias (#name)));
@ -54,7 +55,7 @@
#ifdef __i386__ #ifdef __i386__
# define internal_function __attribute__ ((regparm (3), stdcall)) # define internal_function __attribute__ ((regparm (3), stdcall))
@@ -77,7 +81,7 @@ @@ -77,7 +82,7 @@
#define internal_strong_alias(name, aliasname) \ #define internal_strong_alias(name, aliasname) \
extern __typeof (name) aliasname __attribute__ ((alias (#name))) internal_function; extern __typeof (name) aliasname __attribute__ ((alias (#name))) internal_function;
@ -63,7 +64,7 @@
#define attribute_hidden \ #define attribute_hidden \
__attribute__ ((visibility ("hidden"))) __attribute__ ((visibility ("hidden")))
#else #else
@@ -166,7 +170,7 @@ asm (".section predict_data, \"aw\"; .pr @@ -166,7 +171,7 @@ asm (".section predict_data, \"aw\"; .pr
#endif #endif
/* Avoid PLT entries. */ /* Avoid PLT entries. */