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reutermjreutermj
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Get glibc building
Currently only shared is building. getting a relocation error when trying to statically link :/ Also had to update the llvm tar to contain the clang headers now that I know they're used for defining toolchain specific stuff.
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‎.bazelignore‎

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examples
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examples
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repo_gen

‎.gitignore‎

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bazel-*
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bazel-*
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examples/hello_world/MODULE.bazel.lock

‎MODULE.bazel‎

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@@ -13,13 +13,18 @@ http_archive = use_repo_rule("@bazel_tools//tools/build_defs/repo:http.bzl", "ht
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http_archive(
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name = "llvm-19.1.7-linux-x86_64",
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url = "https://github.com/reutermj/toolchains_cc/releases/download/binaries/llvm-19.1.7-linux-x86_64.tar.xz",
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sha256 = "ac027eb9f1cde6364d063fe91bd299937eb03b8d906f7ddde639cf65b4872cb3",
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sha256 = "2dc7c2d6804eb5cd139f63e03f9e9c1c7ccef2494f71d71995758f5ea58e70c1",
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)
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http_archive(
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name = "musl-1.2.5-linux-x86_64",
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url = "https://github.com/reutermj/toolchains_cc/releases/download/binaries/musl-1.2.5-r10-linux-x86_64.tar.xz",
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sha256 = "5c2ba292f20013f34f6553000171f488c38bcd497472fd0586d2374c447423ff",
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)
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http_archive(
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name = "glibc-2.27-linux-x86_64",
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url = "https://github.com/reutermj/toolchains_cc/releases/download/binaries/glibc-2.27-linux-x86_64.tar.xz",
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sha256 = "94c2e1cf2396b87b4f714995a8c5d2b8f6744219cadb0b81df486092e97b17e4",
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)
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http_archive(
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name = "libcxx-19.1.7-linux-x86_64",
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url = "https://github.com/reutermj/toolchains_cc/releases/download/binaries/libcxx-19.1.7-linux-x86_64.tar.xz",

‎Notes.md‎

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# Notes on the implementation
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## Useful links
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### Alpine Packages
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downloading: https://dl-cdn.alpinelinux.org/alpine/
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searching: https://pkgs.alpinelinux.org/packages
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Build scripts: https://gitlab.alpinelinux.org/alpine/aports
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## TODO
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`platform_data` might allow for changing the toolchain for different targets. need to investigate
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https://github.com/bazelbuild/rules_platform/blob/main/platform_data/defs.bzl
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## libc++
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@@ -16,3 +28,13 @@ You need to get a version of libc++ specifically compiled for musl. When configu
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```
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reference: https://github.com/dslm4515/CMLFS/issues/69
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### TODO
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figure out why I need to link lzma? I dont think I actually want this to be part of the general musl build flow
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## Toolchains
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toolchains contain specific definitions for things like `stddef.h`. glibc relies on these to be there but it appears that musl doesnt?
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either way, need to look into include path ordering to make sure im getting it in the right order.

‎repo_gen/generate_repo.py‎

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@@ -545,4 +545,5 @@ def generate_build_files(dir, actions):
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"link_data",
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"objcopy_embed_data",
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"strip",
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"include",
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])

‎repo_gen/runtimes.json‎

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]
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}
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},
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{
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"name": "glibc",
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"default-version": "2.27",
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"versions": [
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{
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"version": "2.27",
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"oses": [
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{
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"name": "linux",
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"archs": [
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{
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"name": "x86_64",
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"artifact-name": "glibc-2.27-linux-x86_64.tar.xz",
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"sha256": "94c2e1cf2396b87b4f714995a8c5d2b8f6744219cadb0b81df486092e97b17e4"
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}
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]
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}
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]
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}
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],
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"default-configuration": "shared",
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"configurations": {
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"all": [
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{
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"name": "shared",
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"actions": [
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{
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"name": "link_actions",
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"args": [
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"-fuse-ld=lld",
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"-lc",
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"{lib}/libc_nonshared.a"
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]
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},
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{
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"name": "link_executable_actions",
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"args": [
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"{lib}/crt1.o",
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"{lib}/crti.o",
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"{lib}/crtn.o"
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]
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}
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]
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},
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{
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"name": "static",
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"actions": [
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{
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"name": "link_actions",
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"args": [
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"-fuse-ld=lld",
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"{lib}/libc.a",
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"{lib}/libc_nonshared.a"
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]
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},
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{
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"name": "link_executable_actions",
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"args": [
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"{lib}/crt1.o",
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"{lib}/crti.o",
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"{lib}/crtn.o"
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]
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}
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]
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}
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]
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}
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},
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{
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"name": "libcxx",
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"default-version": "19.1.7",

‎repo_gen/runtimes/BUILD‎

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load("@bazel_skylib//rules/directory:directory.bzl", "directory")
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load("@bazel_skylib//rules/directory:subdirectory.bzl", "subdirectory")
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filegroup(
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name = "all-files",
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srcs = glob(["**"]),
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)
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directory(
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name = "root",
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srcs = [":all-files"],
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visibility = ["//visibility:public"],
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)
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subdirectory(
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name = "include",
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parent = ":root",
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path = "include",
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visibility = ["//visibility:public"],
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)
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subdirectory(
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name = "lib",
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parent = ":root",
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path = "lib",
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visibility = ["//visibility:public"],
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)

‎repo_gen/toolchain.json‎

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{
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"name": "x86_64",
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"artifact-name": "llvm-19.1.7-linux-x86_64.tar.xz",
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"sha256": "ac027eb9f1cde6364d063fe91bd299937eb03b8d906f7ddde639cf65b4872cb3"
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"sha256": "2dc7c2d6804eb5cd139f63e03f9e9c1c7ccef2494f71d71995758f5ea58e70c1"
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}
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]
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}

‎repo_gen/toolchain/BUILD‎

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load("@bazel_skylib//rules/directory:directory.bzl", "directory")
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load("@bazel_skylib//rules/directory:subdirectory.bzl", "subdirectory")
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package(default_visibility = ["//visibility:public"])
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filegroup(
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name = "all-files",
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srcs = glob(["**"]),
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)
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directory(
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name = "root",
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srcs = [":all-files"],
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visibility = ["//visibility:public"],
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)
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subdirectory(
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name = "include",
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parent = ":root",
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path = "include",
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visibility = ["//visibility:public"],
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)
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alias(
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name = "ar_actions",
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actual = ":llvm-ar",
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)
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alias(
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name = "assembly_actions",
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actual = ":clang++",
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)
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alias(
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name = "c_compile",
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actual = ":clang",
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)
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alias(
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name = "cpp_compile_actions",
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actual = ":clang++",
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)
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alias(
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name = "link_actions",
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actual = ":clang++",
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)
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filegroup(
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name = "link_data",
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srcs = [
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":ld.lld",
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":ld64.lld",
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":lld",
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":lld-link",
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],
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)
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alias(
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name = "objcopy_embed_data",
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actual = ":llvm-objcopy",
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)
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alias(
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name = "strip",
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actual = ":llvm-strip",
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)

‎repo_gen/toolchain/BUILD.tpl‎

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":llvm-c_compile",
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":llvm-cpp_compile_actions",
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":llvm-link_actions",
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":arg-include",
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],
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"//conditions:default": [],
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}}),
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visibility = ["//toolchain:__pkg__"],
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)
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cc_args(
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name = "arg-include",
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actions = [
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"@rules_cc//cc/toolchains/actions:c_compile",
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"@rules_cc//cc/toolchains/actions:cpp_compile_actions",
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],
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args = [
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"-isystem",
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"{{include}}",
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],
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data = [
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":include",
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],
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format = {{
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"include": ":include",
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}},
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)
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