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| author | Motiejus Jakštys <motiejus@jakstys.lt> | 2022-06-14 14:41:47 +0300 |
|---|---|---|
| committer | Andrew Kelley <andrew@ziglang.org> | 2022-07-11 13:55:29 -0700 |
| commit | 1f410b500c8dbe33191a54a4ae02a6fb0febec46 (patch) | |
| tree | 7948dd086ed915e1dbd2d94a32e314ea6bb9af10 /src/link | |
| parent | ade9bd9287fcdd730a7562811d0e50a6899a6cf2 (diff) | |
| download | zig-1f410b500c8dbe33191a54a4ae02a6fb0febec46.tar.gz zig-1f410b500c8dbe33191a54a4ae02a6fb0febec46.zip | |
ELF: understand -Wl,--compress-debug-sections
This argument is both a compiler and a linker flag. The linker flag was
not understood; now it is. Go likes to use it as a linker flag.
Tested with sqlite3. The size difference is significant, and I confirmed
gdb understands both binaries.
zlib: 3.66MB
------------
CC="zig cc"
CFLAGS="-Wl,--compress-debug-sections=zlib -O2"
./configure --disable-tcl
make
FILE SIZE VM SIZE
-------------- --------------
39.1% 1.43Mi 88.4% 1.43Mi .text
19.6% 734Ki 0.0% 0 .debug_info
16.4% 613Ki 0.0% 0 .debug_loc
13.1% 492Ki 0.0% 0 .debug_line
4.2% 157Ki 9.5% 157Ki .rodata
2.3% 87.6Ki 0.0% 0 .debug_ranges
1.5% 56.2Ki 0.0% 0 .symtab
1.1% 40.2Ki 0.0% 0 .strtab
1.0% 38.2Ki 0.0% 0 .debug_str
0.7% 26.2Ki 0.0% 0 .debug_frame
0.4% 15.3Ki 0.9% 15.3Ki .data
0.1% 4.71Ki 0.3% 4.71Ki .dynsym
0.1% 3.65Ki 0.2% 3.26Ki [16 Others]
0.1% 2.55Ki 0.2% 2.55Ki .rela.plt
0.1% 2.12Ki 0.0% 0 [ELF Section Headers]
0.0% 0 0.1% 2.02Ki .bss
0.0% 1.84Ki 0.1% 1.84Ki .dynstr
0.0% 1.72Ki 0.1% 1.72Ki .plt
0.0% 1.58Ki 0.1% 1.58Ki .hash
0.0% 1.17Ki 0.0% 0 .debug_abbrev
0.0% 1.01Ki 0.1% 1.01Ki .rela.dyn
100.0% 3.66Mi 100.0% 1.62Mi TOTAL
none: 8.56MB
------------
CC="zig cc" CFLAGS="-O2" ./configure --disable-tcl
make
FILE SIZE VM SIZE
-------------- --------------
41.1% 3.52Mi 0.0% 0 .debug_loc
18.5% 1.59Mi 0.0% 0 .debug_info
16.7% 1.43Mi 88.4% 1.43Mi .text
11.8% 1.01Mi 0.0% 0 .debug_line
5.9% 515Ki 0.0% 0 .debug_ranges
1.8% 157Ki 9.5% 157Ki .rodata
1.3% 118Ki 0.0% 0 .debug_frame
1.3% 110Ki 0.0% 0 .debug_str
0.6% 56.2Ki 0.0% 0 .symtab
0.5% 40.2Ki 0.0% 0 .strtab
0.2% 15.3Ki 0.9% 15.3Ki .data
0.1% 4.71Ki 0.3% 4.71Ki .dynsym
0.0% 3.64Ki 0.2% 3.26Ki [16 Others]
0.0% 2.98Ki 0.0% 0 .debug_abbrev
0.0% 2.55Ki 0.2% 2.55Ki .rela.plt
0.0% 2.12Ki 0.0% 0 [ELF Section Headers]
0.0% 0 0.1% 2.02Ki .bss
0.0% 1.84Ki 0.1% 1.84Ki .dynstr
0.0% 1.72Ki 0.1% 1.72Ki .plt
0.0% 1.58Ki 0.1% 1.58Ki .hash
0.0% 1.01Ki 0.1% 1.01Ki .rela.dyn
100.0% 8.56Mi 100.0% 1.62Mi TOTAL
Diffstat (limited to 'src/link')
| -rw-r--r-- | src/link/Elf.zig | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/link/Elf.zig b/src/link/Elf.zig index f7d582bae7..bab7fb44cc 100644 --- a/src/link/Elf.zig +++ b/src/link/Elf.zig @@ -1351,6 +1351,7 @@ fn linkWithLLD(self: *Elf, comp: *Compilation, prog_node: *std.Progress.Node) !v link.hashAddSystemLibs(&man.hash, self.base.options.system_libs); man.hash.add(allow_shlib_undefined); man.hash.add(self.base.options.bind_global_refs_locally); + man.hash.addOptional(self.base.options.compress_debug_sections); man.hash.add(self.base.options.tsan); man.hash.addOptionalBytes(self.base.options.sysroot); man.hash.add(self.base.options.linker_optimization); @@ -1754,6 +1755,11 @@ fn linkWithLLD(self: *Elf, comp: *Compilation, prog_node: *std.Progress.Node) !v try argv.append("--allow-shlib-undefined"); } + if (self.base.options.compress_debug_sections) |how| { + const arg = try std.fmt.allocPrint(arena, "--compress-debug-sections={s}", .{@tagName(how)}); + try argv.append(arg); + } + if (self.base.options.bind_global_refs_locally) { try argv.append("-Bsymbolic"); } |