[Bug gold/24527] New: Linker GOLD: Symbols inside 'extern "C++"' or 'extern "Java"' in version scripts are not matched

[Arfrever.FTA at GMail dot Com]

https://sourceware.org/bugzilla/show_bug.cgi?id=24527

            Bug ID: 24527
           Summary: Linker GOLD: Symbols inside 'extern "C++"' or 'extern
                    "Java"' in version scripts are not matched
           Product: binutils
           Version: 2.32
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gold
          Assignee: ccoutant at gmail dot com
          Reporter: Arfrever.FTA at GMail dot Com
                CC: ian at airs dot com
  Target Milestone: ---

$ cat test.s
        .data
        .globl  C_data
C_data:

        .text
        .globl  C_text
C_text:

        .data
        .globl  CPLUSPLUS_data
CPLUSPLUS_data:

        .text
        .globl  CPLUSPLUS_text
CPLUSPLUS_text:

        .data
        .globl  JAVA_data
JAVA_data:

        .text
        .globl  JAVA_text
JAVA_text:

        .data
        .globl  XXX_1
XXX_1:
        .globl  XXX_2
XXX_2:

        .text
        .globl  XXX_3
XXX_3:
        .globl  XXX_4
XXX_4:
$ cat test.map
{
  global:
    extern "C" {
      C_*;
    };
    extern "C++" {
      CPLUSPLUS_*;
    };
    extern "Java" {
      JAVA_*;
    };

  local:
    *;
};
$ gcc -fuse-ld=bfd -shared -Wl,--version-script=test.map -o test_bfd.so test.s
$ gcc -fuse-ld=gold -shared -Wl,--version-script=test.map -o test_gold.so
test.s
$ 


Comparison between library built with linker BFD and library built with linker
GOLD:

$ diff -u10 <(nm test_bfd.so | sed -e "s/^[0-9a-f]\+ //") <(nm test_gold.so |
sed -e "s/^[0-9a-f]\+ //")
--- /dev/fd/63
+++ /dev/fd/62
@@ -1,30 +1,34 @@
-D CPLUSPLUS_data
-T CPLUSPLUS_text
+d CPLUSPLUS_data
+t CPLUSPLUS_text
 D C_data
 T C_text
-D JAVA_data
-T JAVA_text
+d JAVA_data
+t JAVA_text
 d XXX_1
 d XXX_2
 t XXX_3
 t XXX_4
 d _DYNAMIC
 d _GLOBAL_OFFSET_TABLE_
                  w _ITM_deregisterTMCloneTable
                  w _ITM_registerTMCloneTable
 r __FRAME_END__
 d __TMC_END__
-                 w __cxa_finalize@@GLIBC_2.2.5
+d __TMC_LIST__
+t __bss_start
+                 w __cxa_finalize
 t __do_global_dtors_aux
 t __do_global_dtors_aux_fini_array_entry
 d __dso_handle
 t __frame_dummy_init_array_entry
                  w __gmon_start__
 t __x86_indirect_thunk_rax
 t __x86_return_thunk
+t _edata
+t _end
 t _fini
 t _init
 b completed.7940
 t deregister_tm_clones
 t frame_dummy
 t register_tm_clones
$ 


All versions of linker GOLD (including current trunk) are affected.

Problem originally found when building Protocol Buffers with GOLD:
https://bugs.gentoo.org/683892
Protocol Buffers 3.7.1 has this version script which hides all symbols other
than *google*:
https://github.com/protocolbuffers/protobuf/blob/v3.7.1/src/libprotobuf.map

-- 
You are receiving this mail because:
You are on the CC list for the bug.