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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/main.zig | |
| 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/main.zig')
| -rw-r--r-- | src/main.zig | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/main.zig b/src/main.zig index 4fe048bb93..c23aa3111a 100644 --- a/src/main.zig +++ b/src/main.zig @@ -443,6 +443,8 @@ const usage_build_generic = \\ -dynamic Force output to be dynamically linked \\ -static Force output to be statically linked \\ -Bsymbolic Bind global references locally + \\ --compress-debug-sections= Compress DWARF debug sections + \\ none|zlib \\ --subsystem [subsystem] (Windows) /SUBSYSTEM:<subsystem> to the linker \\ --stack [size] Override default stack size \\ --image-base [addr] Set base address for executable image @@ -657,6 +659,7 @@ fn buildOutputType( var version_script: ?[]const u8 = null; var disable_c_depfile = false; var linker_gc_sections: ?bool = null; + var linker_compress_debug_sections: ?link.CompressDebugSections = null; var linker_allow_shlib_undefined: ?bool = null; var linker_bind_global_refs_locally: ?bool = null; var linker_import_memory: ?bool = null; @@ -938,6 +941,11 @@ fn buildOutputType( install_name = args_iter.next() orelse { fatal("expected parameter after {s}", .{arg}); }; + } else if (mem.startsWith(u8, arg, "--compress-debug-sections=")) { + const param = arg["--compress-debug-sections=".len..]; + linker_compress_debug_sections = std.meta.stringToEnum(link.CompressDebugSections, param) orelse { + fatal("expected --compress-debug-sections=[none|zlib], found '{s}'", .{param}); + }; } else if (mem.eql(u8, arg, "-pagezero_size")) { const next_arg = args_iter.next() orelse { fatal("expected parameter after {s}", .{arg}); @@ -1776,6 +1784,15 @@ fn buildOutputType( linker_global_base = parseIntSuffix(arg, "--global-base=".len); } else if (mem.startsWith(u8, arg, "--export=")) { try linker_export_symbol_names.append(arg["--export=".len..]); + } else if (mem.eql(u8, arg, "--compress-debug-sections")) { + i += 1; + if (i >= linker_args.items.len) { + fatal("expected linker arg after '{s}'", .{arg}); + } + const arg1 = linker_args.items[i]; + linker_compress_debug_sections = std.meta.stringToEnum(link.CompressDebugSections, arg1) orelse { + fatal("expected [none|zlib] after --compress-debug-sections, found '{s}'", .{arg1}); + }; } else if (mem.eql(u8, arg, "-z")) { i += 1; if (i >= linker_args.items.len) { @@ -2849,6 +2866,7 @@ fn buildOutputType( .linker_nxcompat = linker_nxcompat, .linker_dynamicbase = linker_dynamicbase, .linker_optimization = linker_optimization, + .linker_compress_debug_sections = linker_compress_debug_sections, .major_subsystem_version = major_subsystem_version, .minor_subsystem_version = minor_subsystem_version, .link_eh_frame_hdr = link_eh_frame_hdr, |