Compile rustc for a custom target

1

Hi everyone,

I am working actually on my Linux distribution. I did a package manager able to build a Linux system completely from scratch from the source.

I am just facing a small problem. I need to compile rustc for a custom target.
The target I have on the system is: x86_64-horizon-linux-gnu

How should I proceed ? I guess I need to change something in the file config.toml, but after lot of try, I don't get the result I want...

This is the script called by my package manager (even you don't know the API, should be easy to understand):

class Target < ISM::Software

    def prepare
        super

        configData = <<-CODE
        changelog-seen = 2

        [llvm]
        targets = "X86"
        link-shared = true

        [build]
        full-bootstrap = true
        docs = false
        extended = true
        locked-deps = true
        tools = ["cargo", "clippy", "rustdoc", "rustfmt"]
        vendor = true

        [install]
        prefix = "/usr"
        docdir = "share/doc/rustc-1.71.1"

        [rust]
        channel = "stable"

        [target.#{Ism.settings.systemTarget}]
        llvm-config = "/usr/bin/llvm-config"
        CODE
        fileWriteData("#{buildDirectoryPath}/config.toml",configData)
    end
    
    def build
        super

        runPythonCommand(   arguments:      "./x.py build",
                            path:           buildDirectoryPath,
                            environment:    {"LIBSSH2_SYS_USE_PKG_CONFIG" => "1"})
    end
    
    def prepareInstallation
        super

        runPythonCommand(   arguments:      "./x.py install",
                            path:           buildDirectoryPath,
                            environment:    {   "DESTDIR" => "#{builtSoftwareDirectoryPath}#{Ism.settings.rootPath}",
                                                "LIBSSH2_SYS_USE_PKG_CONFIG" => "1"})

        deleteAllFilesRecursivelyFinishing( path:       "#{builtSoftwareDirectoryPath}#{Ism.settings.rootPath}",
                                            extensions: ["old"])
    end

end

This is my project page by the way: https://github.com/Fulgurance/ISM

(Horizon will be my linux system name)

2

While you were absolutely correct to post this here, in this particular case I think you may have a higher probability of getting a useful answer on IRLO.

The reason for that is that adding a new target is more akin to development of the Rust language itself rather than using Rust (even though that is ultimately the point).

3

Okay got it. It's done. Thanks a lot :grin:

4

As I understand it, Rust uses unknown always, instead of for example pc or whatever vanity name different distros want to use. Unlike GCC etc, the target triplet is considered as a single string that has to match exactly. So this sort of customisation simply isn't supported.

5

Okay, so in that case. I have a question. How can I then build properly firefox. Because of this, I get an error normally I don't have. Firefox can't find cmath

 1:29.01   exit status: 0
 1:29.01   running: "/usr/bin/clang" "-O1" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=x86_64-unknown-linux-gnu" "-std=gnu99" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/system_wrappers" "-include" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/config/gcc_hidden.h" "-U_FORTIFY_SOURCE" "-D_FORTIFY_SOURCE=2" "-fstack-protector-strong" "-fstack-clash-protection" "-DNDEBUG=1" "-DTRIMMED=1" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/toolkit/library/rust" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/toolkit/library/rust" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/include" "-I/usr/include/nspr" "-I/usr/include/nss" "-I/usr/include/nspr" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/include/nss" "-I/usr/include/libpng16" "-I/usr/include/pixman-1" "-include" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/mozilla-config.h" "-DMOZILLA_CLIENT" "-fPIC" "-ffunction-sections" "-fdata-sections" "-fno-math-errno" "-pthread" "-pipe" "-O2" "-fomit-frame-pointer" "-funwind-tables" "-Wno-error=tautological-type-limit-compare" "-Wno-range-loop-analysis" "-Wno-error=deprecated-declarations" "-Wno-error=array-bounds" "-Wno-error=free-nonheap-object" "-Wno-error=atomic-alignment" "-Wno-error=deprecated-builtins" "-Wno-psabi" "-Wno-error=builtin-macro-redefined" "-Wno-unknown-warning-option" "-fno-strict-aliasing" "-ffp-contract=off" "-DMOZILLA_CONFIG_H" "-I" "glsl-optimizer/include" "-I" "glsl-optimizer/src/mesa" "-I" "glsl-optimizer/src/mapi" "-I" "glsl-optimizer/src/compiler" "-I" "glsl-optimizer/src/compiler/glsl" "-I" "glsl-optimizer/src/gallium/auxiliary" "-I" "glsl-optimizer/src/gallium/include" "-I" "glsl-optimizer/src" "-I" "glsl-optimizer/src/util" "-D__STDC_FORMAT_MACROS" "-D_GNU_SOURCE" "-DHAVE_ENDIAN_H" "-DHAVE_PTHREAD" "-DHAVE_TIMESPEC_GET" "-DMOZ_INCLUDE_MOZALLOC_H" "-Dmozilla_throw_gcc_h" "-o" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/release/build/glslopt-ce80c9358cf233fd/out/glsl-optimizer/src/compiler/shader_enums.o" "-c" "glsl-optimizer/src/compiler/shader_enums.c"
 1:29.01   exit status: 0
 1:29.01   AR_x86_64-unknown-linux-gnu = None
 1:29.01   AR_x86_64_unknown_linux_gnu = Some("/usr/bin/llvm-ar")
 1:29.01   running: ZERO_AR_DATE="1" "/usr/bin/llvm-ar" "cq" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/release/build/glslopt-ce80c9358cf233fd/out/libmesa.a" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/release/build/glslopt-ce80c9358cf233fd/out/glsl-optimizer/src/mesa/program/dummy_errors.o" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/release/build/glslopt-ce80c9358cf233fd/out/glsl-optimizer/src/mesa/program/symbol_table.o" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/release/build/glslopt-ce80c9358cf233fd/out/glsl-optimizer/src/mesa/main/extensions_table.o" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/release/build/glslopt-ce80c9358cf233fd/out/glsl-optimizer/src/compiler/shader_enums.o"
 1:29.01   exit status: 0
 1:29.01   running: "/usr/bin/llvm-ar" "s" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/release/build/glslopt-ce80c9358cf233fd/out/libmesa.a"
 1:29.01   exit status: 0
 1:29.01   cargo:rustc-link-lib=static=mesa
 1:29.01   cargo:rustc-link-search=native=/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/release/build/glslopt-ce80c9358cf233fd/out
 1:29.01   TARGET = Some("x86_64-unknown-linux-gnu")
 1:29.01   OPT_LEVEL = Some("1")
 1:29.01   HOST = Some("x86_64-unknown-linux-gnu")
 1:29.01   CXX_x86_64-unknown-linux-gnu = None
 1:29.01   CXX_x86_64_unknown_linux_gnu = Some("/usr/bin/clang++")
 1:29.01   CXXFLAGS_x86_64-unknown-linux-gnu = None
 1:29.01   CXXFLAGS_x86_64_unknown_linux_gnu = Some(" -I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/stl_wrappers -I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/system_wrappers -include /sources/WebBrowsers-Main/Firefox/115.2.0/Sources/config/gcc_hidden.h -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fstack-protector-strong -fstack-clash-protection -DNDEBUG=1 -DTRIMMED=1 -I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/toolkit/library/rust -I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/toolkit/library/rust -I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/include -I/usr/include/nspr -I/usr/include/nss -I/usr/include/nspr -I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/include/nss -I/usr/include/libpng16 -I/usr/include/pixman-1 -DMOZILLA_CLIENT -include /sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/mozilla-config.h -fno-sized-deallocation -fno-aligned-new -fno-exceptions -fPIC -fno-rtti -ffunction-sections -fdata-sections -fno-exceptions -fno-math-errno -pthread -pipe -O2 -fomit-frame-pointer -funwind-tables -Wno-error=tautological-type-limit-compare -Wno-invalid-offsetof -Wno-range-loop-analysis -Wno-error=deprecated -Wno-error=deprecated-anon-enum-enum-conversion -Wno-error=deprecated-enum-enum-conversion -Wno-error=deprecated-pragma -Wno-error=deprecated-this-capture -Wno-inline-new-delete -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=free-nonheap-object -Wno-error=atomic-alignment -Wno-error=deprecated-builtins -Wno-psabi -Wno-error=builtin-macro-redefined -Wno-unknown-warning-option -fno-strict-aliasing -ffp-contract=off -DMOZILLA_CONFIG_H")
 1:29.01   CRATE_CC_NO_DEFAULTS = None
 1:29.01   DEBUG = Some("false")
 1:29.01   running: "/usr/bin/clang++" "-O1" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=x86_64-unknown-linux-gnu" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/stl_wrappers" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/system_wrappers" "-include" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/config/gcc_hidden.h" "-U_FORTIFY_SOURCE" "-D_FORTIFY_SOURCE=2" "-fstack-protector-strong" "-fstack-clash-protection" "-DNDEBUG=1" "-DTRIMMED=1" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/toolkit/library/rust" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/toolkit/library/rust" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/include" "-I/usr/include/nspr" "-I/usr/include/nss" "-I/usr/include/nspr" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/include/nss" "-I/usr/include/libpng16" "-I/usr/include/pixman-1" "-DMOZILLA_CLIENT" "-include" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/mozilla-config.h" "-fno-sized-deallocation" "-fno-aligned-new" "-fno-exceptions" "-fPIC" "-fno-rtti" "-ffunction-sections" "-fdata-sections" "-fno-exceptions" "-fno-math-errno" "-pthread" "-pipe" "-O2" "-fomit-frame-pointer" "-funwind-tables" "-Wno-error=tautological-type-limit-compare" "-Wno-invalid-offsetof" "-Wno-range-loop-analysis" "-Wno-error=deprecated" "-Wno-error=deprecated-anon-enum-enum-conversion" "-Wno-error=deprecated-enum-enum-conversion" "-Wno-error=deprecated-pragma" "-Wno-error=deprecated-this-capture" "-Wno-inline-new-delete" "-Wno-error=deprecated-declarations" "-Wno-error=array-bounds" "-Wno-error=free-nonheap-object" "-Wno-error=atomic-alignment" "-Wno-error=deprecated-builtins" "-Wno-psabi" "-Wno-error=builtin-macro-redefined" "-Wno-unknown-warning-option" "-fno-strict-aliasing" "-ffp-contract=off" "-DMOZILLA_CONFIG_H" "-I" "glsl-optimizer/include" "-I" "glsl-optimizer/src/mesa" "-I" "glsl-optimizer/src/mapi" "-I" "glsl-optimizer/src/compiler" "-I" "glsl-optimizer/src/compiler/glsl" "-I" "glsl-optimizer/src/gallium/auxiliary" "-I" "glsl-optimizer/src/gallium/include" "-I" "glsl-optimizer/src" "-I" "glsl-optimizer/src/util" "-D__STDC_FORMAT_MACROS" "-D_GNU_SOURCE" "-DHAVE_ENDIAN_H" "-DHAVE_PTHREAD" "-DHAVE_TIMESPEC_GET" "-DMOZ_INCLUDE_MOZALLOC_H" "-Dmozilla_throw_gcc_h" "-o" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/release/build/glslopt-ce80c9358cf233fd/out/glsl-optimizer/src/compiler/glsl_types.o" "-c" "glsl-optimizer/src/compiler/glsl_types.cpp"
 1:29.01   cargo:warning=In file included from glsl-optimizer/src/compiler/glsl_types.cpp:25:
 1:29.01   cargo:warning=In file included from glsl-optimizer/src/mesa/main/macros.h:35:
 1:29.01   cargo:warning=In file included from glsl-optimizer/src/util/u_math.h:42:
 1:29.01   cargo:warning=In file included from glsl-optimizer/include/c99_math.h:194:
 1:29.01   cargo:warning=In file included from /sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/stl_wrappers/cmath:62:
 1:29.01   cargo:warning=/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/system_wrappers/cmath:3:15: fatal error: 'cmath' file not found
 1:29.01   cargo:warning=#include_next <cmath>
 1:29.01   cargo:warning=              ^~~~~~~
 1:29.01   cargo:warning=1 error generated.
 1:29.01   exit status: 1
 1:29.02   --- stderr
 1:29.02   error occurred: Command "/usr/bin/clang++" "-O1" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=x86_64-unknown-linux-gnu" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/stl_wrappers" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/system_wrappers" "-include" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/config/gcc_hidden.h" "-U_FORTIFY_SOURCE" "-D_FORTIFY_SOURCE=2" "-fstack-protector-strong" "-fstack-clash-protection" "-DNDEBUG=1" "-DTRIMMED=1" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/toolkit/library/rust" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/toolkit/library/rust" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/include" "-I/usr/include/nspr" "-I/usr/include/nss" "-I/usr/include/nspr" "-I/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/dist/include/nss" "-I/usr/include/libpng16" "-I/usr/include/pixman-1" "-DMOZILLA_CLIENT" "-include" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/mozilla-config.h" "-fno-sized-deallocation" "-fno-aligned-new" "-fno-exceptions" "-fPIC" "-fno-rtti" "-ffunction-sections" "-fdata-sections" "-fno-exceptions" "-fno-math-errno" "-pthread" "-pipe" "-O2" "-fomit-frame-pointer" "-funwind-tables" "-Wno-error=tautological-type-limit-compare" "-Wno-invalid-offsetof" "-Wno-range-loop-analysis" "-Wno-error=deprecated" "-Wno-error=deprecated-anon-enum-enum-conversion" "-Wno-error=deprecated-enum-enum-conversion" "-Wno-error=deprecated-pragma" "-Wno-error=deprecated-this-capture" "-Wno-inline-new-delete" "-Wno-error=deprecated-declarations" "-Wno-error=array-bounds" "-Wno-error=free-nonheap-object" "-Wno-error=atomic-alignment" "-Wno-error=deprecated-builtins" "-Wno-psabi" "-Wno-error=builtin-macro-redefined" "-Wno-unknown-warning-option" "-fno-strict-aliasing" "-ffp-contract=off" "-DMOZILLA_CONFIG_H" "-I" "glsl-optimizer/include" "-I" "glsl-optimizer/src/mesa" "-I" "glsl-optimizer/src/mapi" "-I" "glsl-optimizer/src/compiler" "-I" "glsl-optimizer/src/compiler/glsl" "-I" "glsl-optimizer/src/gallium/auxiliary" "-I" "glsl-optimizer/src/gallium/include" "-I" "glsl-optimizer/src" "-I" "glsl-optimizer/src/util" "-D__STDC_FORMAT_MACROS" "-D_GNU_SOURCE" "-DHAVE_ENDIAN_H" "-DHAVE_PTHREAD" "-DHAVE_TIMESPEC_GET" "-DMOZ_INCLUDE_MOZALLOC_H" "-Dmozilla_throw_gcc_h" "-o" "/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/firefox-build-dir/release/build/glslopt-ce80c9358cf233fd/out/glsl-optimizer/src/compiler/glsl_types.o" "-c" "glsl-optimizer/src/compiler/glsl_types.cpp" with args "clang++" did not execute successfully (status code exit status: 1).
 1:29.02 warning: build failed, waiting for other jobs to finish...
 1:34.20 devtools/platform
 1:34.72 devtools/shared/heapsnapshot
 1:36.32 docshell/base
 1:39.69 docshell/base/timeline
 1:41.19 docshell/build
 1:41.20 docshell/shistory
 1:41.24 dom/abort
 1:41.25 dom/animation
 1:41.26 dom/audiochannel
 1:41.54 dom/base
 1:42.20 dom/battery
 1:43.53 make[4]: *** [/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/config/makefiles/rust.mk:441: force-cargo-library-build] Error 101
 1:43.53 make[3]: *** [/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/config/recurse.mk:72: toolkit/library/rust/target] Error 2
 1:43.54 make[3]: *** Waiting for unfinished jobs....
 2:37.71 make[2]: *** [/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/config/recurse.mk:34: compile] Error 2
 2:37.71 make[1]: *** [/sources/WebBrowsers-Main/Firefox/115.2.0/Sources/config/rules.mk:361: default] Error 2
 2:37.71 make: *** [client.mk:60: build] Error 2
 2:37.73 9 compiler warnings present.
[!] Failed to run python ./mach build in /sources/WebBrowsers-Main/Firefox/115.2.0/Sources// with given environment MACH_BUILD_PYTHON_NATIVE_PACKAGE_SOURCE=none MOZBUILD_STATE_PATH=mozbuild with the loaded environment file
6

That I don't know. I have never attempted to mix vanity triplets with default ones.

7

You could perhaps check what other distros with vanity triplets do. Arch Linux appears to carry patches for example: Arch Linux / Packaging / Packages / rust ยท GitLab

I don't know where to find Debian packages etc, but they likely have similar things going on.

In general I would suggest avoiding custom triplets, it just creates unnecessary pain for you and your users.