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fix: support linker-script with Zig 0.15.1+ #602

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Merged
aherrmann merged 3 commits into from
Feb 2, 2026
Merged

fix: support linker-script with Zig 0.15.1+ #602

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1d653fc
Fix linker-script examples.
aherrmann Feb 2, 2026
31f01c4
Document linker-script requirements
aherrmann Feb 2, 2026
eb5f67d
linker-scripts are only supported on Linux
aherrmann Feb 2, 2026
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8 changes: 4 additions & 4 deletions docs/rules.md
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57 changes: 21 additions & 36 deletions e2e/workspace/linker-script/BUILD.bazel
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Original file line number Diff line number Diff line change
Expand Up @@ -6,24 +6,19 @@ zig_binary(
name = "binary",
linker_script = "custom.ld",
main = "bin.zig",
target_compatible_with = select({
# apparent linker-script support regression in 0.15.1, see
# https://github.com/ziglang/zig/issues/25069
"@zig_toolchains//:0.15.2": ["@platforms//:incompatible"],
"//conditions:default": ["@platforms//os:linux"],
}),
target_compatible_with = ["@platforms//os:linux"],
# As of 0.15.1 linker-scripts require the LLVM/LLD backend,
# see https://github.com/ziglang/zig/issues/25069.
zigopts = [
"-fllvm",
"-flld",
],
)

genrule(
name = "bin_output",
outs = ["bin_output.actual"],
cmd = "$(execpath :binary) > $(OUTS)",
target_compatible_with = select({
# apparent linker-script support regression in 0.15.1, see
# https://github.com/ziglang/zig/issues/25069
"@zig_toolchains//:0.15.2": ["@platforms//:incompatible"],
"//conditions:default": ["@platforms//os:linux"],
}),
tools = [":binary"],
)

Expand All @@ -32,34 +27,23 @@ diff_test(
size = "small",
file1 = ":bin_output.expected",
file2 = ":bin_output.actual",
target_compatible_with = select({
# apparent linker-script support regression in 0.15.1, see
# https://github.com/ziglang/zig/issues/25069
"@zig_toolchains//:0.15.2": ["@platforms//:incompatible"],
"//conditions:default": ["@platforms//os:linux"],
}),
)

zig_static_library(
name = "library",
linker_script = "custom.ld",
main = "lib.zig",
target_compatible_with = select({
# apparent linker-script support regression in 0.15.1, see
# https://github.com/ziglang/zig/issues/25069
"@zig_toolchains//:0.15.2": ["@platforms//:incompatible"],
"//conditions:default": ["@platforms//os:linux"],
}),
target_compatible_with = ["@platforms//os:linux"],
# As of 0.15.1 linker-scripts require the LLVM/LLD backend,
# see https://github.com/ziglang/zig/issues/25069.
zigopts = [
"-fllvm",
"-flld",
],
)

build_test(
name = "library_build_test",
target_compatible_with = select({
# apparent linker-script support regression in 0.15.1, see
# https://github.com/ziglang/zig/issues/25069
"@zig_toolchains//:0.15.2": ["@platforms//:incompatible"],
"//conditions:default": ["@platforms//os:linux"],
}),
targets = [
":library",
],
Expand All @@ -70,10 +54,11 @@ zig_test(
size = "small",
linker_script = "custom.ld",
main = "test.zig",
target_compatible_with = select({
# apparent linker-script support regression in 0.15.1, see
# https://github.com/ziglang/zig/issues/25069
"@zig_toolchains//:0.15.2": ["@platforms//:incompatible"],
"//conditions:default": ["@platforms//os:linux"],
}),
target_compatible_with = ["@platforms//os:linux"],
# As of 0.15.1 linker-scripts require the LLVM/LLD backend,
# see https://github.com/ziglang/zig/issues/25069.
zigopts = [
"-fllvm",
"-flld",
],
)
8 changes: 7 additions & 1 deletion zig/private/common/zig_build.bzl
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Original file line number Diff line number Diff line change
Expand Up @@ -91,7 +91,13 @@ The default behavior is to include them in executables and shared libraries.
default = "default",
),
"linker_script": attr.label(
doc = "Custom linker script for the target.",
doc = """\
Custom linker script for the target.

Note, as of Zig version 0.15.1 linker-scripts require the LLVM/LLD backend to be
enabled, see https://github.com/ziglang/zig/issues/25069. Set
`zigopts=["-fllvm", "-flld"]` to that end.
""",
allow_single_file = True,
mandatory = False,
),
Expand Down