https://sourceware.org/bugzilla/show_bug.cgi?id=33765
Bug ID: 33765
Summary: Slow Rust link with -pie -z pack-relative-relocs
Product: binutils
Version: 2.45
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: sam at gentoo dot org
Target Milestone: ---
Linking amdgpu_top (a Rust application) with bfd is very slow. It seems to be
the combination of -pie -z pack-relative-relocs.
```
$ time ld -pie -z pack-relative-relocs --eh-frame-hdr -m elf_x86_64 Scrt1.o
crti.o crtbeginS.o
amdgpu_top-a797a75eb19ad674.amdgpu_top.6162e9ef1383e27f-cgu.0.rcgu.o -L.
-Bstatic libcompiler_builtins-e2a93e358f074ed3.rlib -Bdynamic -ldl -ldl -ldrm
-ldrm_amdgpu -lgcc_s -lutil -lrt -lpthread -lm -ldl -lc --eh-frame-hdr
crtendS.o crtn.o -o amdgpu_top-a797a75eb19ad674
real 19m40.900s
user 16m26.492s
sys 3m5.661s
```
Without -z pack-relative-relocs:
```
+ ld -pie --eh-frame-hdr -m elf_x86_64 Scrt1.o crti.o crtbeginS.o
amdgpu_top-a797a75eb19ad674.amdgpu_top.6162e9ef1383e27f-cgu.0.rcgu.o -L.
-Bstatic libcompiler_builtins-e2a93e358f074ed3.rlib -Bdynamic -ldl -ldl -ldrm
-ldrm_amdgpu -lgcc_s -lutil -lrt -lpthread -lm -ldl -lc --eh-frame-hdr
crtendS.o crtn.o -o amdgpu_top-a797a75eb19ad674
real 0m3.489s
user 0m2.308s
sys 0m1.168s
```
Without -pie:
```
+ ld -z pack-relative-relocs --eh-frame-hdr -m elf_x86_64 Scrt1.o crti.o
crtbeginS.o
amdgpu_top-a797a75eb19ad674.amdgpu_top.6162e9ef1383e27f-cgu.0.rcgu.o -L.
-Bstatic libcompiler_builtins-e2a93e358f074ed3.rlib -Bdynamic -ldl -ldl -ldrm
-ldrm_amdgpu -lgcc_s -lutil -lrt -lpthread -lm -ldl -lc --eh-frame-hdr
crtendS.o crtn.o -o amdgpu_top-a797a75eb19ad674
real 0m3.378s
user 0m2.149s
sys 0m1.211s
```
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