Static libraries include full paths

[peppergrayxyz]

Zig Version

0.13.0

Steps to Reproduce and Observed Behavior

When building a static library, the full path to the object file is included in the output (This may relate to #18450).

This behavior is present in Debug and Release mode. Especially for Release builds, local path should not be shared with everyone.

Zig library

$ zig init
$ zig build
$ nm -g zig-out/lib/libtest.a

/home/user/repos/test/.zig-cache/o/9e8763c141c04c7df9724acbbf6ab810/libtest.a.o:
0000000000000000 T add
                 w _DYNAMIC
0000000000030240 W getauxval
                 U memcpy
                 U memset
                 U __zig_probe_stack

$ zig build -Doptimize=ReleaseSmall                                                  
$ nm -g zig-out/lib/libtest.a

/home/user/repos/test/.zig-cache/o/9e8763c141c04c7df9724acbbf6ab810/libtest.a.o:
0000000000000000 T add

C library

This is also the case, when building a c-library.

// src/module/add.c
int add(int a, int b) { return a + b; }

// src/module/sub.c
int sub(int a, int b) { return a - b; }

// src/module/lib.c
extern int add(int a, int b);
extern int sub(int a, int b);
int math_add(int a, int b) { return add(a, b); }
int math_sub(int a, int b) { return sub(a, b); }

build.zig

const std = @import("std");

pub fn build(b: *std.Build) void {
    const target = b.standardTargetOptions(.{});
    const optimize = b.standardOptimizeOption(.{});

    const lib = b.addStaticLibrary(.{
        .name = "math",
        .target = target,
        .optimize = optimize,
        .link_libc = true,
    });
    
    lib.addCSourceFiles(.{ .files = &.{ "src/lib.c", "src/module/add.c", "src/module/sub.c" }, .flags = &.{} });

    b.installArtifact(lib);
}

$ zig build
$ nm -g zig-out/lib/libmath.a

/home/user/repos/test-c/.zig-cache/o/df1ceb68b0cb3b5d5375d6d191b61744/lib.o:
                 U add
0000000000000000 T math_add
0000000000000020 T math_sub
                 U sub

/home/user/repos/test-c/.zig-cache/o/65d3a2b2cb6c15a834c2f7f78aaabe6d/add.o:
0000000000000000 T add

/home/user/repos/test-c/.zig-cache/o/daef4e863ef4545f15791d571b39e315/sub.o:
0000000000000000 T sub

$ zig build -Doptimize=ReleaseSafe
$ nm -g zig-out/lib/libmath.a

/home/user/repos/test-c/.zig-cache/o/f9eb70172b51837f406b61e4e5f0fbce/lib.o:
                 U add
0000000000000000 T math_add
0000000000000010 T math_sub
                 U sub

/home/user/repos/test-c/.zig-cache/o/b6b5b473535e751271e5801ee1030388/add.o:
0000000000000000 T add

/home/user/repos/test-c/.zig-cache/o/e2c1f520300946aa4150d54bb69471bd/sub.o:
0000000000000000 T sub

Expected Behavior

Only object file names and relative paths (i.a.) are present:

Zig library

$ zig init
$ zig build
$ nm -g zig-out/lib/libtest.a

libtest.a.o:
0000000000000000 T add
                 w _DYNAMIC
0000000000030240 W getauxval
                 U memcpy
                 U memset
                 U __zig_probe_stack

$ zig build -Doptimize=ReleaseSmall                                                  
$ nm -g zig-out/lib/libtest.a

libtest.a.o:
0000000000000000 T add

C library

$ zig build
$ nm -g zig-out/lib/libmath.a

lib.o:
                 U add
0000000000000000 T math_add
0000000000000020 T math_sub
                 U sub

module/add.o:
0000000000000000 T add

module/sub.o:
0000000000000000 T sub

$ zig build -Doptimize=ReleaseSafe
$ nm -g zig-out/lib/libmath.a

lib.o:
                 U add
0000000000000000 T math_add
0000000000000010 T math_sub
                 U sub

module/add.o:
0000000000000000 T add

module/sub.o:
0000000000000000 T sub