How to build for i686-unknown-linux-gnu?

[kpp]

Hello, I would like to build a x86 only binary. I tried to build libgccjit multiple times but I failed. So I got errors like:

libgccjit.so: error: gcc_jit_types value unsupported on this target: 32

or

libgccjit.so: error: gcc_jit_block_end_with_return: mismatching types: return of (unsigned long long)1 (type: unsigned long long) in function _RINvNtCs1TI45VtEMUH_4core3mem7size_ofaEB4_ (return type: __uint32_t)

Can you please help me?

[antoyo]

Hi.
Do you use my fork of gcc?

The type 32 is GCC_JIT_TYPE_INT128_T, which I'm assuming isn't supported on your 32-bit target, so it seems the check to see if the type is supported doesn't work in this case.

For the second error, it could just be a bug in libgccjit: are those 2 types (unsigned long long and __uint32_t) of the same size of that target?

[kpp]

Yes, I use your fork. Here is how I configure it:

../configure --enable-host-shared --enable-languages=jit,c --disable-bootstrap --enable-multilib --target=x86_64-pc-linux-gnu --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64 --enable-multiarch --prefix=$(pwd)/../install

Also I set TARGET_TRIPLE="i686-unknown-linux-gnu" and context.add_command_line_option("-m32");. Here is the output:

   Compiling rustc-std-workspace-core v1.99.0 (/home/kpp/rustc_codegen_gcc/build_sysroot/sysroot_src/library/rustc-std-workspace-core)
libgccjit.so: error: gcc_jit_types value unsupported on this target: 32
thread 'rustc' panicked at 'file "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/rustc_std_workspace_core-e1b756f39c847da4.rustc_std_workspace_core.6f3949db-cgu.0.rcgu.o" for gnu builder: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/archive.rs:168:92
stack backtrace:

[antoyo]

Did you add check_context.add_command_line_option("-m32"); here as well?

[kpp]

No. I did right now, here are new errors:

   Compiling rustc-std-workspace-core v1.99.0 (/home/kpp/rustc_codegen_gcc/build_sysroot/sysroot_src/library/rustc-std-workspace-core)
libgccjit.so: error: gcc_jit_block_end_with_return: mismatching types: return of (unsigned long long)1 (type: unsigned long long) in function _RINvNtCs1TI45VtEMUH_4core3mem7size_ofaEB4_ (return type: __uint32_t)
thread 'rustc' panicked at 'gcc_jit_block_end_with_return: mismatching types: return of (unsigned long long)1 (type: unsigned long long) in function _RINvNtCs1TI45VtEMUH_4core3mem7size_ofaEB4_ (return type: __uint32_t)', /home/kpp/.cargo/git/checkouts/gccjit.rs-13c2e290f2fb9e4d/f30cc2b/src/block.rs:250:17
stack backtrace:

[antoyo]

This problem is likely to be caused by this code.

You can probably replace LongLong by Int and ULongLong by UInt and remove those asserts.

In the long term, those would need to be replaced by SSizeT (which doesn't exist yet) and SizeT.

[kpp]

Okay, new errors (several thousand repeating lines):

/tmp/libgccjit-oJAriW/fake.s: Assembler messages:
/tmp/libgccjit-oJAriW/fake.s:12: Error: operand type mismatch for `push'
/tmp/libgccjit-oJAriW/fake.s:17: Error: operand type mismatch for `push'
/tmp/libgccjit-oJAriW/fake.s:19: Error: register save offset not a multiple of 8
/tmp/libgccjit-oJAriW/fake.s:37: Error: operand type mismatch for `push'
/tmp/libgccjit-oJAriW/fake.s:84: Error: operand type mismatch for `push'
/tmp/libgccjit-oJAriW/fake.s:89: Error: operand type mismatch for `push'
/tmp/libgccjit-oJAriW/fake.s:91: Error: register save offset not a multiple of 8
...
/tmp/libgccjit-IywSo2/fake.s:14904: Error: operand size mismatch for `push'
/tmp/libgccjit-IywSo2/fake.s:14905: Error: operand size mismatch for `push'
libgccjit.so: error: error invoking gcc driver
thread 'rustc' panicked at 'file "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/core-f19b364bfdaf6643.core.0944ad2d-cgu.0.rcgu.o" for gnu builder: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/archive.rs:168:92
stack backtrace:

[antoyo]

Try adding:

context.add_driver_option("-m32");

(also keep the add_command_line_option("-m32") that you already have)

[kpp]

Nice. New errors:

libgccjit.so: error: bitcast with types of different sizes
input expression (size: 64):
 <parm_decl 0x7f58ca295a80 param0
    type <integer_type 0x7f58ca0eef18 long long unsigned int public unsigned DI
        size <integer_cst 0x7f58ca146438 constant 64>
        unit-size <integer_cst 0x7f58ca146450 constant 8>
        align:64 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type 0x7f58ca0eef18 precision:64 min <integer_cst 0x7f58ca146720 0> max <integer_cst 0x7f58cb99f720 18446744073709551615>
        pointer_to_this <pointer_type 0x7f58ca15a1f8>>
    visited unsigned DI (null):0:0 size <integer_cst 0x7f58ca146438 64> unit-size <integer_cst 0x7f58ca146450 8>
    align:64 warn_if_not_align:0 context <function_decl 0x7f58c9ea8c00 _RNvMs8_NtCs1TI45VtEMUH_4core3numy10swap_bytes> arg-type <integer_type 0x7f58ca0eef18 long long unsigned int>>
requested type (size: 32):
 <integer_type 0x7f58ca0b5d20 long unsigned int public unsigned SI
    size <integer_cst 0x7f58ca1463d8 type <integer_type 0x7f58ca0d31f8 bitsizetype> constant 32>
    unit-size <integer_cst 0x7f58ca1463f0 type <integer_type 0x7f58ca0d3150 sizetype> constant 4>
    align:32 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type 0x7f58ca0b5d20 precision:32 min <integer_cst 0x7f58ca1466c0 0> max <integer_cst 0x7f58ca1466a8 4294967295>>
thread 'rustc' panicked at 'file "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/object-abfd65b48f7bd446.object.e0ea076a-cgu.9.rcgu.o" for gnu builder: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/archive.rs:168:92
stack backtrace:

End the rest:

error: linking with `cc` failed: exit status: 1
  |
  = note: "cc" "-Wl,--version-script=/tmp/rustcAurIFR/list" "-m32" "/tmp/rustcAurIFR/symbols.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.0.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.1.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.10.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.11.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.12.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.13.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.14.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.15.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.2.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.3.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.4.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.5.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.6.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.7.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.8.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.9.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.1nq9x2lpcwwyuotn.rcgu.rmeta" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.58bouipdls2chlo4.rcgu.o" "-Wl,--as-needed" "-L" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps" "-L" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/debug/deps" "-L" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/build/compiler_builtins-9972fde6461c1c91/out" "-L" "/home/kpp/rustc_codegen_gcc/build_sysroot/sysroot/lib/rustlib/i686-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libpanic_abort-d5ce9804cef363fd.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libobject-abfd65b48f7bd446.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libmemchr-4f66604b38da23a1.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libaddr2line-f3329d10e621719d.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libgimli-998519a3aed8bee2.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/librustc_demangle-a1f8e35e1a587050.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libstd_detect-2437a603efac1c77.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libhashbrown-ca28e33777a5456e.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libminiz_oxide-b76206b5cc0f54dc.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libadler-005e7ee1a9654d21.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/librustc_std_workspace_alloc-decda90df4114b6f.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libunwind-83b2388ad53bb671.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libcfg_if-fd7048576cf190a7.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/liblibc-828b4581b4d80112.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/liballoc-ecac7f3e180dbdcf.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-e1b756f39c847da4.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libcore-f19b364bfdaf6643.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libcompiler_builtins-2722113640365b95.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/home/kpp/rustc_codegen_gcc/build_sysroot/sysroot/lib/rustlib/i686-unknown-linux-gnu/lib" "-o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libstd.so" "-shared" "-Wl,-zrelro,-znow" "-nodefaultlibs"
  = note: cc: error: /home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.13.rcgu.o: No such file or directory
          

error: could not compile `std` due to previous error

[antoyo]

Try changing this line to the following:

arg = self.cx.context.new_cast(None, arg, param_type);

[kpp]

error: linking with `cc` failed: exit status: 1
  |
  = note: "cc" "-Wl,--version-script=/tmp/rustcEiQ1ed/list" "-m32" "/tmp/rustcEiQ1ed/symbols.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.0.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.1.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.10.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.11.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.12.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.13.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.14.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.15.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.2.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.3.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.4.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.5.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.6.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.7.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.8.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.std.22f73aca-cgu.9.rcgu.o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.1nq9x2lpcwwyuotn.rcgu.rmeta" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.58bouipdls2chlo4.rcgu.o" "-Wl,--as-needed" "-L" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps" "-L" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/debug/deps" "-L" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/build/compiler_builtins-9972fde6461c1c91/out" "-L" "/home/kpp/rustc_codegen_gcc/build_sysroot/sysroot/lib/rustlib/i686-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libpanic_abort-d5ce9804cef363fd.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libobject-abfd65b48f7bd446.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libmemchr-4f66604b38da23a1.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libaddr2line-f3329d10e621719d.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libgimli-998519a3aed8bee2.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/librustc_demangle-a1f8e35e1a587050.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libstd_detect-2437a603efac1c77.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libhashbrown-ca28e33777a5456e.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libminiz_oxide-b76206b5cc0f54dc.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libadler-005e7ee1a9654d21.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/librustc_std_workspace_alloc-decda90df4114b6f.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libunwind-83b2388ad53bb671.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libcfg_if-fd7048576cf190a7.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/liblibc-828b4581b4d80112.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/liballoc-ecac7f3e180dbdcf.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-e1b756f39c847da4.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libcore-f19b364bfdaf6643.rlib" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libcompiler_builtins-2722113640365b95.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/home/kpp/rustc_codegen_gcc/build_sysroot/sysroot/lib/rustlib/i686-unknown-linux-gnu/lib" "-o" "/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/libstd.so" "-shared" "-Wl,-zrelro,-znow" "-nodefaultlibs"

  = note: /usr/bin/ld: i386:x86-64 architecture of input file `/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.58bouipdls2chlo4.rcgu.o' is incompatible with i386 output
          collect2: error: ld returned 1 exit status
          

error: could not compile `std` due to previous error

[antoyo]

Can you please try running ./clean_all.sh and try compiling the sysroot again in case you have leftover object files in the wrong format?

[kpp]

No, didn't help.

[kpp]

$ objdump -S /home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.58bouipdls2chlo4.rcgu.o 

/home/kpp/rustc_codegen_gcc/build_sysroot/target/i686-unknown-linux-gnu/debug/deps/std.58bouipdls2chlo4.rcgu.o:     file format elf64-x86-64


Disassembly of section .text:

0000000000000000 <__rust_alloc>:
   0:	55                   	push   %rbp
   1:	48 89 e5             	mov    %rsp,%rbp
   4:	48 83 ec 10          	sub    $0x10,%rsp
   8:	89 7d fc             	mov    %edi,-0x4(%rbp)
   b:	89 75 f8             	mov    %esi,-0x8(%rbp)
   e:	8b 55 f8             	mov    -0x8(%rbp),%edx
  11:	8b 45 fc             	mov    -0x4(%rbp),%eax
  14:	89 d6                	mov    %edx,%esi
  16:	89 c7                	mov    %eax,%edi
  18:	e8 00 00 00 00       	callq  1d <__rust_alloc+0x1d>
  1d:	c9                   	leaveq 
  1e:	c3                   	retq   

Which is defined in build_sysroot/sysroot_src/library/alloc/src/alloc.rs

[kpp]

Adding -m32 here worked!

[antoyo]

Nice!

We should keep this issue open to have a list of what needs to be fixed and also to think about how to support multiarch easily.