error: building the downstream libh3 C library using the Solana SDK via cmake

[johhnsmmith198]

Hi,
solana has this helloworld program that you can build (and deploy on a validator): https://github.com/solana-labs/example-helloworld

It works well before adding the h3ron library.

adding this dependency:

h3ron = "0.13.0"

and running:

 npm run build:program-rust

would generate this error

Error: Function _ZN15crossbeam_epoch8internal6Global7collect17hdc7ca3f69bd0b12bE Stack offset of -4144 exceeded max offset of -4096 by 48 bytes, please minimize large stack variables
*** stack smashing detected ***: terminated
error: could not compile `crossbeam-epoch`

Caused by:
  process didn't exit successfully: `rustc --crate-name crossbeam_epoch --edition=2018 /home/pc/.cargo/registry/src/github.com-1ecc6299db9ec823/crossbeam-epoch-0.9.5/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no --cfg 'feature="alloc"' --cfg 'feature="lazy_static"' --cfg 'feature="std"' -C metadata=1bb560ac1e04b0d7 -C extra-filename=-1bb560ac1e04b0d7 --out-dir /home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/deps --target bpfel-unknown-unknown -L dependency=/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/deps -L dependency=/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/release/deps --extern cfg_if=/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/deps/libcfg_if-1643e4a2c6efb510.rmeta --extern crossbeam_utils=/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/deps/libcrossbeam_utils-c2f18398aedce3c4.rmeta --extern lazy_static=/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/deps/liblazy_static-327a97971696967c.rmeta --extern memoffset=/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/deps/libmemoffset-1762d3769b1ca8cc.rmeta --extern scopeguard=/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/deps/libscopeguard-83203493741a9def.rmeta --cap-lints allow -C lto=no` (signal: 6, SIGABRT: process abort signal)
warning: build failed, waiting for other jobs to finish...
error: build failed

Could you please help?

[nmandery]

Hi,

Seems this is caused by the crossbeam-epoch crate. h3ron does not use that library directly but only indirectly via rayon. There was a bug until recently (see #29) where h3ron pulled in rayon regardless if the use-rayon feature was activated. This should now be fixed in the master branch, but has not been released yet.

Try switching your dependency from the crates.io version "0.13" to latest master from git and see if the problem persists.

[johhnsmmith198]

Thanks for your help
I gave it a try by changing this on the Cargo.toml

h3ron = { git = "https://github.com/nmandery/h3ron.git"}

I get this error now

   Compiling h3ron-h3-sys v0.12.0 (https://github.com/nmandery/h3ron.git#ab3a27f3)
error: failed to run custom build command for `h3ron-h3-sys v0.12.0 (https://github.com/nmandery/h3ron.git#ab3a27f3)`

Caused by:
  process didn't exit successfully: `/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/release/build/h3ron-h3-sys-1ab6cd26d7e5abe9/build-script-build` (exit status: 101)
  --- stdout
  cargo:rerun-if-changed=libh3
  CMAKE_TOOLCHAIN_FILE_bpfel-unknown-unknown = None
  CMAKE_TOOLCHAIN_FILE_bpfel_unknown_unknown = None
  TARGET_CMAKE_TOOLCHAIN_FILE = None
  CMAKE_TOOLCHAIN_FILE = None
  CMAKE_GENERATOR_bpfel-unknown-unknown = None
  CMAKE_GENERATOR_bpfel_unknown_unknown = None
  TARGET_CMAKE_GENERATOR = None
  CMAKE_GENERATOR = None
  CMAKE_PREFIX_PATH_bpfel-unknown-unknown = None
  CMAKE_PREFIX_PATH_bpfel_unknown_unknown = None
  TARGET_CMAKE_PREFIX_PATH = None
  CMAKE_PREFIX_PATH = None
  CMAKE_bpfel-unknown-unknown = None
  CMAKE_bpfel_unknown_unknown = None
  TARGET_CMAKE = None
  CMAKE = None
  running: "cmake" "/home/pc/.cargo/git/checkouts/h3ron-31217b227e8cd3a6/ab3a27f/h3ron-h3-sys/libh3" "-DBUILD_BENCHMARKS=OFF" "-DBUILD_FILTERS=OFF" "-DBUILD_GENERATORS=OFF" "-DBUILD_TESTING=OFF" "-DENABLE_COVERAGE=OFF" "-DENABLE_DOCS=OFF" "-DENABLE_FORMAT=OFF" "-DENABLE_LINTING=OFF" "-DCMAKE_INSTALL_PREFIX=/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/build/h3ron-h3-sys-df478ba73015eab9/out" "-DCMAKE_C_FLAGS= -ffunction-sections -fdata-sections -fPIC --target=bpfel-unknown-unknown" "-DCMAKE_C_COMPILER=/home/pc/.local/share/solana/install/releases/1.9.2/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang" "-DCMAKE_CXX_FLAGS= -ffunction-sections -fdata-sections -fPIC" "-DCMAKE_CXX_COMPILER=/usr/bin/c++" "-DCMAKE_ASM_FLAGS= -ffunction-sections -fdata-sections -fPIC --target=bpfel-unknown-unknown" "-DCMAKE_ASM_COMPILER=/home/pc/.local/share/solana/install/releases/1.9.2/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang" "-DCMAKE_BUILD_TYPE=Release"
  -- The C compiler identification is Clang 13.0.0
  -- Detecting C compiler ABI info
  -- Detecting C compiler ABI info - failed
  -- Check for working C compiler: /home/pc/.local/share/solana/install/releases/1.9.2/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang
  -- Check for working C compiler: /home/pc/.local/share/solana/install/releases/1.9.2/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang - broken
  -- Configuring incomplete, errors occurred!
  See also "/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/build/h3ron-h3-sys-df478ba73015eab9/out/build/CMakeFiles/CMakeOutput.log".
  See also "/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/build/h3ron-h3-sys-df478ba73015eab9/out/build/CMakeFiles/CMakeError.log".

  --- stderr
  CMake Error at /usr/local/share/cmake-3.22/Modules/CMakeTestCCompiler.cmake:69 (message):
    The C compiler

      "/home/pc/.local/share/solana/install/releases/1.9.2/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang"

    is not able to compile a simple test program.

    It fails with the following output:

      Change Dir: /home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/build/h3ron-h3-sys-df478ba73015eab9/out/build/CMakeFiles/CMakeTmp

      Run Build Command(s):/usr/bin/make -f Makefile cmTC_006a3/fast && /usr/bin/make  -f CMakeFiles/cmTC_006a3.dir/build.make CMakeFiles/cmTC_006a3.dir/build
      make[1]: Entering directory '/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/build/h3ron-h3-sys-df478ba73015eab9/out/build/CMakeFiles/CMakeTmp'
      Building C object CMakeFiles/cmTC_006a3.dir/testCCompiler.c.o
      /home/pc/.local/share/solana/install/releases/1.9.2/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang   -ffunction-sections -fdata-sections -fPIC --target=bpfel-unknown-unknown  -std=gnu99 -MD -MT CMakeFiles/cmTC_006a3.dir/testCCompiler.c.o -MF CMakeFiles/cmTC_006a3.dir/testCCompiler.c.o.d -o CMakeFiles/cmTC_006a3.dir/testCCompiler.c.o -c /home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/build/h3ron-h3-sys-df478ba73015eab9/out/build/CMakeFiles/CMakeTmp/testCCompiler.c
      Linking C executable cmTC_006a3
      /usr/local/bin/cmake -E cmake_link_script CMakeFiles/cmTC_006a3.dir/link.txt --verbose=1
      /home/pc/.local/share/solana/install/releases/1.9.2/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang  -ffunction-sections -fdata-sections -fPIC --target=bpfel-unknown-unknown  -rdynamic CMakeFiles/cmTC_006a3.dir/testCCompiler.c.o -o cmTC_006a3
      /usr/bin/ld: unknown architecture of input file `CMakeFiles/cmTC_006a3.dir/testCCompiler.c.o' is incompatible with i386:x86-64 output
      collect2: error: ld returned 1 exit status
      clang-13: error: linker (via gcc) command failed with exit code 1 (use -v to see invocation)
      make[1]: *** [CMakeFiles/cmTC_006a3.dir/build.make:100: cmTC_006a3] Error 1
      make[1]: Leaving directory '/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/build/h3ron-h3-sys-df478ba73015eab9/out/build/CMakeFiles/CMakeTmp'
      make: *** [Makefile:127: cmTC_006a3/fast] Error 2





    CMake will not be able to correctly generate this project.
  Call Stack (most recent call first):
    CMakeLists.txt:59 (project)


  thread 'main' panicked at '
  command did not execute successfully, got: exit status: 1

  build script failed, must exit now', /home/pc/.cargo/registry/src/github.com-1ecc6299db9ec823/cmake-0.1.46/src/lib.rs:974:5
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...
error: build failed

[johhnsmmith198]

Just so you know this is what the npm command that I am running is doing (cargo build-bpf):

npm run build:program-rust

> helloworld@0.0.1 build:program-rust /home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld
> cargo build-bpf --manifest-path=./src/program-rust/Cargo.toml --bpf-out-dir=dist/program

BPF SDK: /home/pc/.local/share/solana/install/releases/1.9.2/solana-release/bin/sdk/bpf
cargo-build-bpf child: rustup toolchain list -v
cargo-build-bpf child: cargo +bpf build --target bpfel-unknown-unknown --release
   Compiling proc-macro2 v1.0.27
   Compiling unicode-xid v0.2.2
   Compiling syn v1.0.73
   Compiling version_check v0.9.3
   Compiling serde v1.0.126
   ...

[nmandery]

Seems the crossbeam issue is solved - great.

Now the problem is building the downstream libh3 C library using the Solana SDK via cmake. It appears cmake correctly detects the C compiler of the SDK, but is not able to find a suitable linker. So it falls back to your systems default linker, but that one does not support the bpfel architecture. I suppose there should be a suitable linker with in the SDK in the same directory as the compiler found by cmake.

Messing with cmake can be tricky, but https://stackoverflow.com/questions/1867745/cmake-use-a-custom-linker gives some hints. The -D flags can also be set using environment variables like https://cmake.org/cmake/help/latest/envvar/CFLAGS.html

[johhnsmmith198]

@nmandery I think I am getting onto something.
I was trying to step back and build and run the original h3 C library.
I was getting into some issues while running the example and created an issue for that: uber/h3#566
Someone was able to find that the linker needed -lh3 but also -lm for the math library.
Could this be related to my other linker issue above ?

[johhnsmmith198]

Also I am seeing that I sudo make install the library called h3 but it seems h3ron is calling it libh3 (that I didn't install actually).

[nmandery]

The h3ron-h3-sys crate compiles its own copy of the h3 library when the crate is build. This happens here https://github.com/nmandery/h3ron/blob/master/h3ron-h3-sys/build.rs#L15 and is done using cmake. The reason for this is to be able to do a static linking of the rust code to the C library and to be independent of h3 being installed with the system libraries.

That means all information about the environment we are compiling for must go there. That works great for the Solana-specfic compiler as this is set in the CC environment variable. So cmake finds this and uses this. But there is not such thing for the linker.

Please have a look in /home/pc/.local/share/solana/install/releases/1.9.2/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/ - there should be something called *ld*, thats the linker we need here. As this is LLVM, its certainly called lld.

cmake supports the CFLAGS environment variable, so we can use this to pass this information to cmake.

First run cargo clean in your project as cmake does lots of caching and will probably not use the new environment variable as long as the caches exist.

Try to build your project with something like

cargo clean
export CFLAGS="-fuse-ld=/home/pc/.local/share/solana/install/releases/1.9.2/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/lld"
npm run build:program-rust

Thats a quite long chain of build tools calling build tools - so hopefully this is of help to you.

libm should be contained in the LLVM of the SDK, I suppose.

Some related links:

• https://stackoverflow.com/questions/10085945/set-cflags-and-cxxflags-options-using-cmake
• https://stackoverflow.com/questions/1867745/cmake-use-a-custom-linker

[johhnsmmith198]

I have switch to use 1.9.4 I hope its ok.
I double checked the paths

=> ls /home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin
clang  clang++  clang-13  clang-cl  clang-cpp  ld64.lld  ld.lld  llc  lld  lld-link  llvm-ar  llvm-objcopy  llvm-objdump  llvm-readelf  llvm-readobj

all good

npm run clean
 export CFLAGS="-fuse-ld=/home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/lld"
npm run build:program-rust

the output

 Run Build Command(s):/usr/bin/make -f Makefile cmTC_8b0c0/fast && /usr/bin/make  -f CMakeFiles/cmTC_8b0c0.dir/build.make CMakeFiles/cmTC_8b0c0.dir/build
      make[1]: Entering directory '/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/build/h3ron-h3-sys-df478ba73015eab9/out/build/CMakeFiles/CMakeTmp'
      Building C object CMakeFiles/cmTC_8b0c0.dir/testCCompiler.c.o
      /home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang   -ffunction-sections -fdata-sections -fPIC --target=bpfel-unknown-unknown -fuse-ld=/home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/lld  -std=gnu99 -MD -MT CMakeFiles/cmTC_8b0c0.dir/testCCompiler.c.o -MF CMakeFiles/cmTC_8b0c0.dir/testCCompiler.c.o.d -o CMakeFiles/cmTC_8b0c0.dir/testCCompiler.c.o -c /home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/build/h3ron-h3-sys-df478ba73015eab9/out/build/CMakeFiles/CMakeTmp/testCCompiler.c
      clang-13: warning: argument unused during compilation: '-fuse-ld=/home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/lld' [-Wunused-command-line-argument]
      Linking C executable cmTC_8b0c0
      /usr/local/bin/cmake -E cmake_link_script CMakeFiles/cmTC_8b0c0.dir/link.txt --verbose=1
      /home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang  -ffunction-sections -fdata-sections -fPIC --target=bpfel-unknown-unknown -fuse-ld=/home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/lld  -rdynamic CMakeFiles/cmTC_8b0c0.dir/testCCompiler.c.o -o cmTC_8b0c0
      gcc: error: unrecognized command line option ‘-fuse-ld=/home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/lld’
      clang-13: error: linker (via gcc) command failed with exit code 1 (use -v to see invocation)
      make[1]: *** [CMakeFiles/cmTC_8b0c0.dir/build.make:100: cmTC_8b0c0] Error 1
      make[1]: Leaving directory '/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/build/h3ron-h3-sys-df478ba73015eab9/out/build/CMakeFiles/CMakeTmp'
      make: *** [Makefile:127: cmTC_8b0c0/fast] Error 2

it says: argument unused during compilation

[nmandery]

Nice that clang gives us this warning.

Try to use the LDFLAGS (https://cmake.org/cmake/help/latest/envvar/LDFLAGS.html) environment variable instead of CFLAGS. Dont forget the cargo clean

[johhnsmmith198]

Thanks all good I am cleaning each time with npm run clean
I see it's clean because it restart downloading everything from scratch

> cargo build-bpf --manifest-path=./src/program-rust/Cargo.toml --bpf-out-dir=dist/program

BPF SDK: /home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf
cargo-build-bpf child: rustup toolchain list -v
cargo-build-bpf child: cargo +bpf build --target bpfel-unknown-unknown --release
   Compiling proc-macro2 v1.0.27
   Compiling unicode-xid v0.2.2
   Compiling syn v1.0.73
...

I have open a new window to get rid of the CFLAGS and only have the LDFLAGS defined
same

 gcc: error: unrecognized command line option ‘-fuse-ld=/home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/lld’
      clang-13: error: linker (via gcc) command failed with exit code 1 (use -v to see invocation)
    

also this is the beginning of the trace. I see clang - broken

   Compiling h3ron-h3-sys v0.12.0 (https://github.com/nmandery/h3ron.git#ab3a27f3)
error: failed to run custom build command for h3ron-h3-sys v0.12.0 (https://github.com/nmandery/h3ron.git#ab3a27f3)

Caused by:
 process didn't exit successfully: /home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/release/build/h3ron-h3-sys-1ab6cd26d7e5abe9/build-script-build (exit status: 101)
 --- stdout
 cargo:rerun-if-changed=libh3
 CMAKE_TOOLCHAIN_FILE_bpfel-unknown-unknown = None
 CMAKE_TOOLCHAIN_FILE_bpfel_unknown_unknown = None
 TARGET_CMAKE_TOOLCHAIN_FILE = None
 CMAKE_TOOLCHAIN_FILE = None
 CMAKE_GENERATOR_bpfel-unknown-unknown = None
 CMAKE_GENERATOR_bpfel_unknown_unknown = None
 TARGET_CMAKE_GENERATOR = None
 CMAKE_GENERATOR = None
 CMAKE_PREFIX_PATH_bpfel-unknown-unknown = None
 CMAKE_PREFIX_PATH_bpfel_unknown_unknown = None
 TARGET_CMAKE_PREFIX_PATH = None
 CMAKE_PREFIX_PATH = None
 CMAKE_bpfel-unknown-unknown = None
 CMAKE_bpfel_unknown_unknown = None
 TARGET_CMAKE = None
 CMAKE = None
 running: "cmake" "/home/pc/.cargo/git/checkouts/h3ron-31217b227e8cd3a6/ab3a27f/h3ron-h3-sys/libh3" "-DBUILD_BENCHMARKS=OFF" "-DBUILD_FILTERS=OFF" "-DBUILD_GENERATORS=OFF" "-DBUILD_TESTING=OFF" "-DENABLE_COVERAGE=OFF" "-DENABLE_DOCS=OFF" "-DENABLE_FORMAT=OFF" "-DENABLE_LINTING=OFF" "-DCMAKE_INSTALL_PREFIX=/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/build/h3ron-h3-sys-df478ba73015eab9/out" "-DCMAKE_C_FLAGS= -ffunction-sections -fdata-sections -fPIC --target=bpfel-unknown-unknown" "-DCMAKE_C_COMPILER=/home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang" "-DCMAKE_CXX_FLAGS= -ffunction-sections -fdata-sections -fPIC" "-DCMAKE_CXX_COMPILER=/usr/bin/c++" "-DCMAKE_ASM_FLAGS= -ffunction-sections -fdata-sections -fPIC --target=bpfel-unknown-unknown" "-DCMAKE_ASM_COMPILER=/home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang" "-DCMAKE_BUILD_TYPE=Release"
 -- The C compiler identification is Clang 13.0.0
 -- Detecting C compiler ABI info
 -- Detecting C compiler ABI info - failed
 -- Check for working C compiler: /home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang
 -- Check for working C compiler: /home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang - broken
 -- Configuring incomplete, errors occurred!

[nmandery]

gcc calling clang? Things are getting confusing ;) Also interesting that the flag is not understood.

One more attempt, if this does not work, I am slowly running out of ideas:

unset CFLAGS
unset LDFLAGS

# search in the SDK first
export PATH="/home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/:$PATH"

cargo clean

# ... then build

[nmandery]

That bpf.mk file here could give more hints on expected environment settings for C/C++ builds to succeed: https://docs.solana.com/developing/on-chain-programs/developing-c#project-layout

[johhnsmmith198]

well back to the beginning I think. Thanks for your help, really appreciate it

 Run Build Command(s):/usr/bin/make -f Makefile cmTC_b4485/fast && /usr/bin/make  -f CMakeFiles/cmTC_b4485.dir/build.make CMakeFiles/cmTC_b4485.dir/build
      make[1]: Entering directory '/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/build/h3ron-h3-sys-df478ba73015eab9/out/build/CMakeFiles/CMakeTmp'
      Building C object CMakeFiles/cmTC_b4485.dir/testCCompiler.c.o
      /home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang   -ffunction-sections -fdata-sections -fPIC --target=bpfel-unknown-unknown  -std=gnu99 -MD -MT CMakeFiles/cmTC_b4485.dir/testCCompiler.c.o -MF CMakeFiles/cmTC_b4485.dir/testCCompiler.c.o.d -o CMakeFiles/cmTC_b4485.dir/testCCompiler.c.o -c /home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/build/h3ron-h3-sys-df478ba73015eab9/out/build/CMakeFiles/CMakeTmp/testCCompiler.c
      Linking C executable cmTC_b4485
      /usr/local/bin/cmake -E cmake_link_script CMakeFiles/cmTC_b4485.dir/link.txt --verbose=1
      /home/pc/.local/share/solana/install/releases/1.9.4/solana-release/bin/sdk/bpf/dependencies/bpf-tools/llvm/bin/clang  -ffunction-sections -fdata-sections -fPIC --target=bpfel-unknown-unknown  -rdynamic CMakeFiles/cmTC_b4485.dir/testCCompiler.c.o -o cmTC_b4485
      /usr/bin/ld: unknown architecture of input file `CMakeFiles/cmTC_b4485.dir/testCCompiler.c.o' is incompatible with i386:x86-64 output
      collect2: error: ld returned 1 exit status
      clang-13: error: linker (via gcc) command failed with exit code 1 (use -v to see invocation)
      make[1]: *** [CMakeFiles/cmTC_b4485.dir/build.make:100: cmTC_b4485] Error 1
      make[1]: Leaving directory '/home/pc/Documents/funspace/crypto-world/lab/solanaworkspace/example-helloworld/src/program-rust/target/bpfel-unknown-unknown/release/build/h3ron-h3-sys-df478ba73015eab9/out/build/CMakeFiles/CMakeTmp'
      make: *** [Makefile:127: cmTC_b4485/fast] Error 2