https://sourceware.org/bugzilla/show_bug.cgi?id=24498
--- Comment #7 from Mark Wielaard <mark at klomp dot org> --- We need a way to generate symbol versions without having to use (top-level) inline assembly. It appears GCC 10 will provide this: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html We should try to use this to define the symbol version macros (OLD_VERSION, NEW_VERSION, COMPAT_VERSION_NEWPROTO, COMPAT_VERSION) in lib/eu-config.h symver ("name2@nodename") On ELF targets this attribute creates a symbol version. The name2 part of the parameter is the actual name of the symbol by which it will be externally referenced. The nodename portion should be the name of a node specified in the version script supplied to the linker when building a shared library. Versioned symbol must be defined and must be exported with default visibility. __attribute__ ((__symver__ ("foo@VERS_1"))) int foo_v1 (void) { } Will produce a .symver foo_v1, foo@VERS_1 directive in the assembler output. It’s an error to define multiple version of a given symbol. In such case an alias can be used. __attribute__ ((__symver__ ("foo@VERS_2"))) __attribute__ ((alias ("foo_v1"))) int symver_foo_v1 (void); This example creates an alias of foo_v1 with symbol name symver_foo_v1 which will be version VERS_2 of foo. Finally if the parameter is "name2@@nodename" then in addition to creating a symbol version (as if "name2@nodename" was used) the version will be also used to resolve name2 by the linker. -- You are receiving this mail because: You are on the CC list for the bug.
