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| author | H.J. Lu <hjl.tools@gmail.com> | 2019-04-26 07:52:00 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2019-04-26 07:52:09 -0700 |
| commit | c54f15248ee990df6cea0b4730cd61b227a0e082 (patch) | |
| tree | c1549a19c4b4e75fb7ab4d6d8a03d6e75c5f0c67 /ld/testsuite | |
| parent | 8e1920d611ab3330d6dfa610ff771cf5dc796097 (diff) | |
| download | gdb-c54f15248ee990df6cea0b4730cd61b227a0e082.zip gdb-c54f15248ee990df6cea0b4730cd61b227a0e082.tar.gz gdb-c54f15248ee990df6cea0b4730cd61b227a0e082.tar.bz2 | |
Don't complain undefined weak dynamic reference
When undefined non-weak references in IR objects are optimized out
by LTO, we can have weak dynamic referencs to symbols marked with
bfd_link_hash_undefined. We shouldn't complain such undefined weak
dynamic references.
bfd/
PR ld/24486
* elflink.c (elf_link_output_extsym): Don't complain undefined
weak dynamic reference.
ld/
PR ld/24486
* testsuite/ld-plugin/lto.exp: Run PR ld/24486 tests.
* testsuite/ld-plugin/pr24486a.c: New file.
* testsuite/ld-plugin/pr24486b.c: Likewise.
* testsuite/ld-plugin/pr24486c.c: Likewise.
Diffstat (limited to 'ld/testsuite')
| -rw-r--r-- | ld/testsuite/ld-plugin/lto.exp | 12 | ||||
| -rw-r--r-- | ld/testsuite/ld-plugin/pr24486a.c | 8 | ||||
| -rw-r--r-- | ld/testsuite/ld-plugin/pr24486b.c | 8 | ||||
| -rw-r--r-- | ld/testsuite/ld-plugin/pr24486c.c | 1 |
4 files changed, 29 insertions, 0 deletions
diff --git a/ld/testsuite/ld-plugin/lto.exp b/ld/testsuite/ld-plugin/lto.exp index b13a773..e913c6f 100644 --- a/ld/testsuite/ld-plugin/lto.exp +++ b/ld/testsuite/ld-plugin/lto.exp @@ -325,6 +325,18 @@ set lto_link_elf_tests [list \ [list {Build pr22220main.o} \ {} {-flto} \ {pr22220main.cc} {} {} {c++}] \ + [list "Build pr24486a.o" \ + "$plug_opt" "-flto -O2" \ + {pr24486a.c} {} "" "c"] \ + [list "Build pr24486b.so" \ + "-shared" "-O2 -fpic" \ + {pr24486b.c} {} "pr24486b.so" "c"] \ + [list "Build pr24486c.so" \ + "-shared -Wl,--no-as-needed tmpdir/pr24486b.so" "-O2 -fpic" \ + {pr24486c.c} {} "pr24486c.so" "c"] \ + [list "PR ld/24486" \ + "-O2 -flto tmpdir/pr24486a.o tmpdir/pr24486c.so -Wl,--as-needed tmpdir/pr24486b.so" "" \ + {dummy.c} {} "pr24486.exe"] \ ] # PR 14918 checks that libgcc is not spuriously included in a shared link of diff --git a/ld/testsuite/ld-plugin/pr24486a.c b/ld/testsuite/ld-plugin/pr24486a.c new file mode 100644 index 0000000..def0139 --- /dev/null +++ b/ld/testsuite/ld-plugin/pr24486a.c @@ -0,0 +1,8 @@ +extern int FLAGS_verbose; +extern void bar (void); +int +a(void) { +return FLAGS_verbose; +} +void unused (void) { bar(); } +int main() { return a (); } diff --git a/ld/testsuite/ld-plugin/pr24486b.c b/ld/testsuite/ld-plugin/pr24486b.c new file mode 100644 index 0000000..3aabe2a --- /dev/null +++ b/ld/testsuite/ld-plugin/pr24486b.c @@ -0,0 +1,8 @@ +extern void bar (void) __attribute__((weak)); + +void +foo (void) +{ + if (bar) + bar (); +} diff --git a/ld/testsuite/ld-plugin/pr24486c.c b/ld/testsuite/ld-plugin/pr24486c.c new file mode 100644 index 0000000..f289177 --- /dev/null +++ b/ld/testsuite/ld-plugin/pr24486c.c @@ -0,0 +1 @@ +int FLAGS_verbose; |