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
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