Experiment: disable -fPIC and relro

[Jarred-Sumner]

What does this PR do?

If we remove fpic and relro, we will shave off about 6 MB from the build on Linux

2.2% 1.99Mi 2.0% 1.99Mi .rela.dyn
4.9% 4.48Mi 4.1% 4.10Mi .data.rel.ro

I'm not confident we can remove fpic. It might break napi. If this build fails then let's re-enable fpic and just relro.

  47.5%  43.7Mi  44.0%  43.7Mi    .text
  42.2%  38.8Mi  39.0%  38.8Mi    .rodata
   0.0%       0   7.4%  7.35Mi    .bss
   4.9%  4.48Mi   4.1%  4.10Mi    .data.rel.ro
   2.4%  2.23Mi   2.2%  2.23Mi    .eh_frame
   2.2%  1.99Mi   2.0%  1.99Mi    .rela.dyn
   0.4%   413Ki   0.4%   413Ki    .eh_frame_hdr
   0.0%       0   0.4%   387Ki    .tbss
   0.2%   211Ki   0.2%   211Ki    .data
   0.1%   116Ki   0.1%   116Ki    .gcc_except_table
   0.0%  13.7Ki   0.0%  13.6Ki    .dynsym
   0.0%  9.67Ki   0.0%  9.61Ki    .rela.plt
   0.0%  8.21Ki   0.0%  8.14Ki    .dynstr
   0.0%  6.48Ki   0.0%  6.42Ki    .plt
   0.0%  3.80Ki   0.0%  3.80Ki    [LOAD #2 [R]]
   0.0%  3.34Ki   0.0%  3.27Ki    .got
   0.0%  3.31Ki   0.0%  3.25Ki    .got.plt
   0.0%  3.03Ki   0.0%  1.11Ki    [19 Others]
   0.0%  1.20Ki   0.0%  1.14Ki    .gnu.version
   0.0%  1.11Ki   0.0%  1.05Ki    .gnu.hash
   0.0%     592   0.0%     528    .dynamic
 100.0%  92.0Mi 100.0%  99.3Mi    TOTAL

Note that Node does not enable relro. This is node's:

❯ bloaty (which node)
    FILE SIZE        VM SIZE    
 --------------  -------------- 
  47.6%  43.2Mi  47.5%  43.2Mi    .rodata
  36.8%  33.4Mi  36.7%  33.4Mi    .text
   8.1%  7.32Mi   8.0%  7.32Mi    .dynstr
   3.6%  3.22Mi   3.5%  3.22Mi    .eh_frame
   2.2%  2.03Mi   2.2%  2.03Mi    .dynsym
   0.8%   709Ki   0.8%   709Ki    .eh_frame_hdr
   0.6%   537Ki   0.6%   537Ki    .gnu.hash
   0.0%       0   0.2%   208Ki    .bss
   0.2%   173Ki   0.2%   173Ki    .gnu.version
   0.2%   153Ki   0.2%   153Ki    .data
   0.0%  12.0Ki   0.0%  12.0Ki    .rela.plt
   0.0%  10.4Ki   0.0%       0    [Unmapped]
   0.0%  8.00Ki   0.0%  8.00Ki    .plt
   0.0%  7.04Ki   0.0%  6.76Ki    .init_array
   0.0%  6.14Ki   0.0%  4.91Ki    [17 Others]
   0.0%  4.27Ki   0.0%  4.27Ki    .got
   0.0%  3.97Ki   0.0%  3.97Ki    [LOAD #3 [RX]]
   0.0%  3.91Ki   0.0%  3.91Ki    .gcc_except_table
   0.0%       0   0.0%  2.60Ki    [LOAD #6 [RW]]
   0.0%  2.00Ki   0.0%       0    [ELF Section Headers]
   0.0%  1.95Ki   0.0%  1.95Ki    .rela.dyn
 100.0%  90.8Mi 100.0%  91.0Mi    TOTAL

How did you verify your code works?

[github-actions]

❌ @Jarred-Sumner, your commit has failing tests :(

🪟💻 3 failing tests Windows x64 baseline

• test/cli/install/registry/bun-install-registry.test.ts 1 failing
• test/js/bun/spawn/spawn.test.ts SIGKILL
• test/js/node/child_process/child_process.test.ts 1 failing

🪟💻 2 failing tests Windows x64

• test/cli/install/registry/bun-install-registry.test.ts 2 failing
• test/js/node/child_process/child_process.test.ts 1 failing

View logs

[github-actions]

clang-tidy nits are fixed! Thank you.

[Jarred-Sumner]

current:

❯ bloaty  /Users/jarred/Downloads/bun-linux-x64\ 16/bun --demangle=full -w
    FILE SIZE        VM SIZE
 --------------  --------------
  48.5%  43.4Mi  44.8%  43.4Mi    .text
  44.4%  39.6Mi  41.0%  39.6Mi    .rodata
   0.0%       0   7.6%  7.35Mi    .bss
   4.4%  3.94Mi   3.9%  3.77Mi    .data.rel.ro
   2.0%  1.80Mi   1.9%  1.80Mi    .eh_frame
   0.0%       0   0.4%   387Ki    .tbss
   0.4%   330Ki   0.3%   330Ki    .eh_frame_hdr
   0.2%   211Ki   0.0%       0    .data
   0.0%  23.1Ki   0.0%  23.1Ki    .gcc_except_table
   0.0%  13.6Ki   0.0%  13.6Ki    .dynsym
   0.0%  9.61Ki   0.0%  9.61Ki    .rela.plt
   0.0%  8.13Ki   0.0%  8.13Ki    .dynstr
   0.0%  6.42Ki   0.0%  6.42Ki    .plt
   0.0%  3.26Ki   0.0%  3.26Ki    [LOAD #2 [R]]
   0.0%  3.25Ki   0.0%  3.25Ki    .got.plt
   0.0%  2.59Ki   0.0%  2.44Ki    [17 Others]
   0.0%  2.41Ki   0.0%  2.41Ki    .got
   0.0%  2.06Ki   0.0%       0    [ELF Section Headers]
   0.0%  1.99Ki   0.0%  1.99Ki    .rela.dyn
   0.0%  1.14Ki   0.0%  1.14Ki    .gnu.version
   0.0%  1.07Ki   0.0%  1.07Ki    .gnu.hash
 100.0%  89.4Mi 100.0%  96.7Mi    TOTAL

[Jarred-Sumner]

Outcome: we still have data.rel.ro, but we did get 2.9 MB smaller

The blocker now is mostly Zig's lack of PIC support - ziglang/zig#17430

    FILE SIZE
 --------------
  48.2%  42.9Mi    .text
  44.6%  39.7Mi    .rodata
   4.3%  3.86Mi    .data.rel.ro
   2.2%  1.93Mi    .eh_frame
   0.4%   356Ki    .eh_frame_hdr
   0.2%   210Ki    .data
   0.0%  23.1Ki    .gcc_except_table
   0.0%  13.5Ki    .dynsym
   0.0%  9.54Ki    .rela.plt
   0.0%  8.07Ki    .dynstr
   0.0%  6.38Ki    .plt
   0.0%  3.39Ki    [LOAD #2 [R]]
   0.0%  3.23Ki    .got.plt
   0.0%  2.42Ki    .got
   0.0%  2.06Ki    .rela.dyn
   0.0%  2.06Ki    [ELF Section Headers]
   0.0%  1.37Ki    [16 Others]
   0.0%  1.13Ki    .gnu.version
   0.0%  1.07Ki    .gnu.hash
   0.0%     560    [ELF Program Headers]
   0.0%     480    .dynamic
 100.0%  89.1Mi    TOTAL

[7heMech]

@Jarred-Sumner will replacing libicu make it even smaller?