https://sourceware.org/bugzilla/show_bug.cgi?id=22649
Bug ID: 22649
Summary: -gc-sections preserves hidden symbols that are also
visible in dynamic objects
Product: binutils
Version: 2.30 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: amonakov at gmail dot com
Target Milestone: ---
Consider the follow testcase with two shared libraries:
$ cat > lib1.s
.globl foo
foo:
$ cat > lib2.s
.hidden foo
.hidden bar
.globl foo
.globl bar
foo:
bar:
call foo@PLT
$ gcc -c *.s
$ ld-new -shared -o lib1.so lib1.o
$ ld-new -shared -o lib2.so lib2.o -gc-sections -print-gc-sections
ld-new: Removing unused section '.text' in file 'lib2.o'
$ ld-new -shared -o lib2.so lib2.o -gc-sections -print-gc-sections lib1.so
[no output]
This is surprising: somehow specifying lib1.so on the command line has the
effect of pinning "foo" as a GC root.
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