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| author | Martin Liska <mliska@suse.cz> | 2020-08-24 13:21:10 +0200 |
|---|---|---|
| committer | Martin Liska <mliska@suse.cz> | 2020-08-26 10:03:19 +0200 |
| commit | 363080bb8bd2cca81dd9e2e774910a8c8226f430 (patch) | |
| tree | dbd812c1ccd60680bc8aaaa61140d251e64efc4b /gcc/doc | |
| parent | d58e7173ef964ddac3ab3ad8cc97de8f9f3b32ee (diff) | |
| download | gcc-363080bb8bd2cca81dd9e2e774910a8c8226f430.zip gcc-363080bb8bd2cca81dd9e2e774910a8c8226f430.tar.gz gcc-363080bb8bd2cca81dd9e2e774910a8c8226f430.tar.bz2 | |
IPA symver: allow multiple symvers for a definition
gcc/ChangeLog:
* cgraphunit.c (process_symver_attribute): Allow multiple
symver attributes for one symbol.
* doc/extend.texi: Document the change.
gcc/testsuite/ChangeLog:
* lib/target-supports-dg.exp: Add dg-require-symver.
* lib/target-supports.exp: Likewise.
* gcc.dg/ipa/symver1.c: New test.
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/extend.texi | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index 2bb9b2f..3b37aba 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -3742,13 +3742,19 @@ foo_v1 (void) Will produce a @code{.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. +One can also define multiple version for a given symbol. @smallexample -__attribute__ ((__symver__ ("foo@@VERS_2"))) -__attribute__ ((alias ("foo_v1"))) -int symver_foo_v1 (void); +__attribute__ ((__symver__ ("foo@@VERS_2"), ("foo@@VERS_3"))) +int symver_foo_v1 (void) +@{ +@} + +__attribute__ ((__symver__ ("bar@@VERS_2")))) +__attribute__ ((__symver__ ("bar@@VERS_3")))) +int symver_bar_v1 (void) +@{ +@} @end smallexample This example creates an alias of @code{foo_v1} with symbol name |