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Apache Teaclave (incubating) SGX SDK helps developers to write Intel SGX applications in the Rust programming language, and also known as Rust SGX SDK.
https://teaclave.apache.org
Apache License 2.0
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V2.0.0 preview:can't build `pgx` crate with error:can't find crate for `proc_macro` #415

Closed xin201501 closed 1 year ago

xin201501 commented 1 year ago

pgx is a crate to write custom functions to postgres database. It has no_std features to turn off std,(but I think in v2.0.0 we don't have to turn off std for most crates.) I used the project template in the samplecode folder. Here is my Cargo.toml file in Enclave folder:

[package]
name = "sample"
version = "1.0.0"
authors = ["XXX"]
edition = "2021"

[lib]
name = "sample"
crate-type = ["staticlib"]

[features]
default = ["pg15"]
pg11 = ["pgx/pg11"]
pg12 = ["pgx/pg12"]
pg13 = ["pgx/pg13"]
pg14 = ["pgx/pg14"]
pg15 = ["pgx/pg15"]

[dependencies]
pgx = {version = "0.6.1",default-features = false}

[dev-dependencies]

# uncomment these if compiling outside of 'pgx'
[profile.dev]
panic = "unwind"
lto = "thin"

[profile.release]
panic = "unwind"
opt-level = 3
lto = "fat"
codegen-units = 1

here is the compile output:

--- samplecode/pgx_in_sgx ‹v2.0.0-preview* ?› » make clean
--- samplecode/pgx_in_sgx ‹v2.0.0-preview* ?› » CC=gcc-10 CXX=g++-10 make
/home/xin201501/sgx_sdk_2_17_1/sgxsdk/bin/x64/sgx_edger8r  --trusted enclave/enclave.edl --search-path /home/xin201501/incubator-teaclave-sgx-sdk/common/inc --search-path /home/xin201501/incubator-teaclave-sgx-sdk/sgx_edl/edl --trusted-dir enclave
/home/xin201501/sgx_sdk_2_17_1/sgxsdk/bin/x64/sgx_edger8r  --untrusted enclave/enclave.edl --search-path /home/xin201501/incubator-teaclave-sgx-sdk/common/inc --search-path /home/xin201501/incubator-teaclave-sgx-sdk/sgx_edl/edl --untrusted-dir app
GEN => enclave/enclave_t.c enclave/enclave_t.h app/enclave_u.c app/enclave_u.h
   Compiling libc v0.2.139
   Compiling sgx_types v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_types)
   Compiling sgx_urts v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_urts)
   Compiling app v1.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/samplecode/pgx_in_sgx/app)
   Compiling sgx_uprotected_fs v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_protected_fs/ufs)
    Finished release [optimized] target(s) in 1.90s
LINK => bin/app
   Compiling compiler_builtins v0.1.82
   Compiling sgx_build_helper v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_build_helper/build_helper)
   Compiling core v0.0.0 (/home/xin201501/.rustup/toolchains/nightly-2022-10-22-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core)
   Compiling sgx_types v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_types)
   Compiling sgx_trts v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_trts)
   Compiling sgx_download_prebuilt v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_build_helper/download_prebuilt)
   Compiling sgx_unwind v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_unwind)
   Compiling sgx_crypto_sys v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_crypto/sgx_crypto_sys)
   Compiling sgx_tlibc_sys v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_libc/sgx_tlibc_sys)
   Compiling rustc-std-workspace-core v1.99.0 (/home/xin201501/.rustup/toolchains/nightly-2022-10-22-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-core)
   Compiling alloc v0.0.0 (/home/xin201501/.rustup/toolchains/nightly-2022-10-22-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc)
   Compiling sgx_alloc v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_alloc)
   Compiling hashbrown_tstd v0.12.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_tstd/hashbrown)
   Compiling panic_unwind v0.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/rustlib/panic_unwind)
   Compiling sgx_ffi v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_ffi)
   Compiling sgx_sync v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_sync)
   Compiling panic_abort v0.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/rustlib/panic_abort)
   Compiling sgx_rsrvmm v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_rsrvmm)
   Compiling sgx_oc v2.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/sgx_oc)
   Compiling std v0.0.0 (/home/xin201501/incubator-teaclave-sgx-sdk/rustlib/std)
    Finished release [optimized] target(s) in 23.38s
   Compiling proc-macro2 v1.0.49
   Compiling quote v1.0.23
   Compiling unicode-ident v1.0.6
   Compiling syn v1.0.107
   Compiling autocfg v1.1.0
   Compiling memchr v2.5.0
   Compiling libc v0.2.139
   Compiling cfg-if v1.0.0
   Compiling log v0.4.17
   Compiling serde_derive v1.0.152
   Compiling serde v1.0.152
   Compiling once_cell v1.17.0
   Compiling regex-syntax v0.6.28
   Compiling thiserror v1.0.38
   Compiling eyre v0.6.8
   Compiling serde_json v1.0.91
   Compiling indexmap v1.9.2
   Compiling lazy_static v1.4.0
   Compiling crossbeam-utils v0.8.14
   Compiling memoffset v0.7.1
   Compiling tracing-core v0.1.30
   Compiling crossbeam-epoch v0.9.13
   Compiling pin-project-lite v0.2.9
   Compiling tinyvec_macros v0.1.0
   Compiling glob v0.3.0
   Compiling overload v0.1.1
   Compiling tinyvec v1.6.0
   Compiling aho-corasick v0.7.20
   Compiling tracing-log v0.1.3
   Compiling nu-ansi-term v0.46.0
   Compiling clang-sys v1.4.0
   Compiling sharded-slab v0.1.4
   Compiling thread_local v1.1.4
   Compiling indenter v0.3.3
   Compiling smallvec v1.10.0
   Compiling hashbrown v0.12.3
   Compiling ucd-trie v0.1.5
   Compiling scopeguard v1.1.0
   Compiling itoa v1.0.5
   Compiling ryu v1.0.12
   Compiling unicode-normalization v0.1.22
   Compiling regex v1.7.0
   Compiling regex-automata v0.1.10
   Compiling semver v1.0.16
   Compiling percent-encoding v2.2.0
   Compiling cty v0.2.2
   Compiling minimal-lexical v0.2.1
   Compiling fixedbitset v0.4.2
   Compiling unicode-bidi v0.3.8
   Compiling rayon-core v1.10.1
   Compiling seq-macro v0.3.2
   Compiling nom v7.1.2
   Compiling petgraph v0.6.2
   Compiling form_urlencoded v1.1.0
   Compiling idna v0.3.0
   Compiling matchers v0.1.0
   Compiling cstr_core v0.2.6
   Compiling crossbeam-deque v0.8.2
   Compiling crossbeam-channel v0.5.6
   Compiling num_cpus v1.15.0
   Compiling dirs-sys v0.3.7
   Compiling atty v0.2.14
   Compiling libloading v0.7.4
   Compiling convert_case v0.5.0
   Compiling bindgen v0.60.1
   Compiling unescape v0.1.0
error[E0463]: can't find crate for `proc_macro`
   --> /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.49/src/lib.rs:122:1
    |
122 | extern crate proc_macro;
    | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate

   Compiling dirs v4.0.0
error[E0635]: unknown feature `proc_macro_span`
  --> /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.49/src/lib.rs:92:13
   |
92 |     feature(proc_macro_span, proc_macro_span_shrink)
   |             ^^^^^^^^^^^^^^^

error[E0635]: unknown feature `proc_macro_span_shrink`
  --> /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.49/src/lib.rs:92:30
   |
92 |     feature(proc_macro_span, proc_macro_span_shrink)
   |                              ^^^^^^^^^^^^^^^^^^^^^^

   Compiling url v2.3.1
   Compiling cexpr v0.6.0
Some errors have detailed explanations: E0463, E0635.
For more information about an error, try `rustc --explain E0463`.
error: could not compile `proc-macro2` due to 3 previous errors
warning: build failed, waiting for other jobs to finish...
make: *** [Makefile:181：enclave] 错误 101

I think the real "problematic crate" may be proc-macro2 crate.

volcano0dr commented 1 year ago

Thanks for reporting this issue. I solved it by adding proc-macro to sysroot. I updated template, you can try to compile your project again.

xin201501 commented 1 year ago

Thanks! It compiles when only adding this crate pgx as a dependency and not using it to write some functions.(In other words no functions use this dependency). When using it to write some Enclave functions,the enclave part of my project finishes compiling,but fails to link:

    Finished dev [unoptimized + debuginfo] target(s) in 1m 23s
/usr/bin/ld: ./lib/libenclave.a(pgx_pg_sys-fc533ebe75dea904.pgx_pg_sys.646afbca-cgu.9.rcgu.o): in function `pgx_pg_sys::submodules::panic::do_ereport':
/home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/panic.rs:368: undefined reference to `ErrorContext'
/usr/bin/ld: ./lib/libenclave.a(pgx_pg_sys-fc533ebe75dea904.pgx_pg_sys.646afbca-cgu.9.rcgu.o): in function `pgx_pg_sys::all_versions::MemoryContextSwitchTo':
/home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/lib.rs:513: undefined reference to `CurrentMemoryContext'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/lib.rs:515: undefined reference to `CurrentMemoryContext'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/lib.rs:513: undefined reference to `CurrentMemoryContext'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/lib.rs:515: undefined reference to `CurrentMemoryContext'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `list_nth_cell':
/home/xin201501/.pgx/15.1/pgx-install/include/postgresql/server/nodes/pg_list.h:258: undefined reference to `ExceptionalCondition'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `list_nth':
/home/xin201501/.pgx/15.1/pgx-install/include/postgresql/server/nodes/pg_list.h:280: undefined reference to `ExceptionalCondition'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `GetMemoryChunkContext':
/home/xin201501/.pgx/15.1/pgx-install/include/postgresql/server/utils/memutils.h:131: undefined reference to `ExceptionalCondition'
/usr/bin/ld: /home/xin201501/.pgx/15.1/pgx-install/include/postgresql/server/utils/memutils.h:124: undefined reference to `ExceptionalCondition'
/usr/bin/ld: /home/xin201501/.pgx/15.1/pgx-install/include/postgresql/server/utils/memutils.h:123: undefined reference to `ExceptionalCondition'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `pgx_elog':
/home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/cshim/pgx-cshim.c:38: undefined reference to `errstart'
/usr/bin/ld: /home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/cshim/pgx-cshim.c:38: undefined reference to `errmsg_internal'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `pgx_ereport':
/home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/cshim/pgx-cshim.c:98: undefined reference to `errstart'
/usr/bin/ld: /home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/cshim/pgx-cshim.c:99: undefined reference to `errcode'
/usr/bin/ld: /home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/cshim/pgx-cshim.c:100: undefined reference to `errmsg'
/usr/bin/ld: /home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/cshim/pgx-cshim.c:102: undefined reference to `errdetail'
/usr/bin/ld: /home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/cshim/pgx-cshim.c:105: undefined reference to `errcontext_msg'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `fastgetattr':
/home/xin201501/.pgx/15.1/pgx-install/include/postgresql/server/access/htup_details.h:761: undefined reference to `ExceptionalCondition'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `list_nth_cell':
/home/xin201501/.pgx/15.1/pgx-install/include/postgresql/server/nodes/pg_list.h:259: undefined reference to `ExceptionalCondition'
/usr/bin/ld: /home/xin201501/.pgx/15.1/pgx-install/include/postgresql/server/nodes/pg_list.h:259: undefined reference to `ExceptionalCondition'
/usr/bin/ld: /home/xin201501/.pgx/15.1/pgx-install/include/postgresql/server/nodes/pg_list.h:259: undefined reference to `ExceptionalCondition'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `list_nth_int':
/home/xin201501/.pgx/15.1/pgx-install/include/postgresql/server/nodes/pg_list.h:291: undefined reference to `ExceptionalCondition'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o):/home/xin201501/.pgx/15.1/pgx-install/include/postgresql/server/nodes/pg_list.h:259: more undefined references to `ExceptionalCondition' follow
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `pgx_elog':
/home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/cshim/pgx-cshim.c:38: undefined reference to `errfinish'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `pgx_errcontext_msg':
/home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/cshim/pgx-cshim.c:48: undefined reference to `errcontext_msg'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `pgx_ereport':
/home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/cshim/pgx-cshim.c:107: undefined reference to `errfinish'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `heap_getattr':
/home/xin201501/.pgx/15.1/pgx-install/include/postgresql/server/access/htup_details.h:798: undefined reference to `getmissingattr'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `fastgetattr':
/home/xin201501/.pgx/15.1/pgx-install/include/postgresql/server/access/htup_details.h:764: undefined reference to `nocachegetattr'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `heap_getattr':
/home/xin201501/.pgx/15.1/pgx-install/include/postgresql/server/access/htup_details.h:803: undefined reference to `heap_getsysattr'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `pgx_ARR_NELEMS':
/home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/cshim/pgx-cshim.c:201: undefined reference to `ArrayGetNItems'
/usr/bin/ld: ./lib/libenclave.a(pgx-cshim.o): in function `pgx_SpinLockAcquire':
/home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/cshim/pgx-cshim.c:231: undefined reference to `s_lock'
/usr/bin/ld: ./lib/libenclave.a(pgx_pg_sys-fc533ebe75dea904.pgx_pg_sys.646afbca-cgu.15.rcgu.o): in function `pgx_pg_sys::submodules::thread_check::init_active_thread':
/home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/thread_check.rs:41: undefined reference to `pthread_atfork'
/usr/bin/ld: ./lib/libenclave.a(pgx_pg_sys-fc533ebe75dea904.pgx_pg_sys.646afbca-cgu.3.rcgu.o): in function `pgx_pg_sys::submodules::ffi::pg_guard_ffi_boundary_impl':
/home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:72: undefined reference to `CurrentMemoryContext'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:73: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:74: undefined reference to `error_context_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:76: undefined reference to `__sigsetjmp'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:80: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:100: undefined reference to `CurrentMemoryContext'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:129: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:130: undefined reference to `error_context_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:86: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:87: undefined reference to `error_context_stack'
/usr/bin/ld: ./lib/libenclave.a(pgx_pg_sys-fc533ebe75dea904.pgx_pg_sys.646afbca-cgu.3.rcgu.o): in function `pgx_pg_sys::pg15::CopyErrorData::{{closure}}':
/home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/pg15.rs:13399: undefined reference to `CopyErrorData'
/usr/bin/ld: ./lib/libenclave.a(pgx_pg_sys-fc533ebe75dea904.pgx_pg_sys.646afbca-cgu.3.rcgu.o): in function `pgx_pg_sys::submodules::ffi::pg_guard_ffi_boundary_impl':
/home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:72: undefined reference to `CurrentMemoryContext'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:73: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:74: undefined reference to `error_context_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:76: undefined reference to `__sigsetjmp'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:80: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:100: undefined reference to `CurrentMemoryContext'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:129: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:130: undefined reference to `error_context_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:86: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:87: undefined reference to `error_context_stack'
/usr/bin/ld: ./lib/libenclave.a(pgx_pg_sys-fc533ebe75dea904.pgx_pg_sys.646afbca-cgu.3.rcgu.o): in function `pgx_pg_sys::pg15::FreeErrorData::{{closure}}':
/home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/pg15.rs:13408: undefined reference to `FreeErrorData'
/usr/bin/ld: ./lib/libenclave.a(pgx_pg_sys-fc533ebe75dea904.pgx_pg_sys.646afbca-cgu.3.rcgu.o): in function `pgx_pg_sys::submodules::ffi::pg_guard_ffi_boundary_impl':
/home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:72: undefined reference to `CurrentMemoryContext'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:73: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:74: undefined reference to `error_context_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:76: undefined reference to `__sigsetjmp'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:80: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:100: undefined reference to `CurrentMemoryContext'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:129: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:130: undefined reference to `error_context_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:86: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:87: undefined reference to `error_context_stack'
/usr/bin/ld: ./lib/libenclave.a(pgx_pg_sys-fc533ebe75dea904.pgx_pg_sys.646afbca-cgu.3.rcgu.o): in function `pgx_pg_sys::pg15::palloc0::{{closure}}':
/home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/pg15.rs:13716: undefined reference to `palloc0'
/usr/bin/ld: ./lib/libenclave.a(pgx_pg_sys-fc533ebe75dea904.pgx_pg_sys.646afbca-cgu.3.rcgu.o): in function `pgx_pg_sys::submodules::ffi::pg_guard_ffi_boundary_impl':
/home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:72: undefined reference to `CurrentMemoryContext'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:73: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:74: undefined reference to `error_context_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:76: undefined reference to `__sigsetjmp'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:80: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:100: undefined reference to `CurrentMemoryContext'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:129: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:130: undefined reference to `error_context_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:86: undefined reference to `PG_exception_stack'
/usr/bin/ld: /home/xin201501/.cargo/registry/src/github.com-1ecc6299db9ec823/pgx-pg-sys-0.6.1/src/submodules/ffi.rs:87: undefined reference to `error_context_stack'
/usr/bin/ld: ./lib/libenclave.a(pgx_pg_sys-fc533ebe75dea904.pgx_pg_sys.646afbca-cgu.3.rcgu.o): in function `pgx_pg_sys::pg15::pfree::{{closure}}':
/home/xin201501/incubator-teaclave-sgx-sdk/samplecode/template/enclave/target/x86_64-unknown-linux-sgx/debug/build/pgx-pg-sys-451c5dc41c4634b5/out/pg15.rs:13755: undefined reference to `pfree'
collect2: error: ld returned 1 exit status
make: *** [Makefile:160：bin/enclave.so] 错误 1

Many undefined references are used by pg_sys crate,an underlying crate which has many FFI Calls to communicate with underlying database. I found that this pg_sys crate uses its own CFLAGS to compile some C code.Perhaps they are not compatible with enclave environment. These C functions are indeed hard to deal with.We almost have no control of them... It can compile and link outside SGX environment.