[Build] CMake Fails to Find Non-LTS Abseil Library (Download Triggered)

[mudream4869]

Describe the issue

CMake cannot locate a locally installed Abseil library that is not an LTS (Long-Term Support) version. As a result, the build process proceeds to download the Abseil library automatically.

Ref: Abseil will only give a version in lts branch.

Urgency

Not Urgent - Workaround in Place:

Currently, the issue of CMake downloading Abseil despite a local installation is not considered urgent. A temporary workaround has been implemented by removing the version check from the FetchContent_Declare command. This allows CMake to use the locally installed Abseil library without triggering the download.

Target platform

ubuntu 24.04

Build script

cmake -GNinja \
      -DCMAKE_BUILD_TYPE=Release \
      -Donnxruntime_BUILD_UNIT_TESTS=ON \
      -Donnxruntime_USE_AVX=ON \
      -Donnxruntime_BUILD_SHARED_LIB=ON \
      -DPYTHON_EXECUTABLE=$(which python3) \
      -DFETCHCONTENT_TRY_FIND_PACKAGE_MODE=ALWAYS \
      -DONNX_USE_PROTOBUF_SHARED_LIBS=ON \
      ../onnxruntime-1.19.0/cmake

Error / output

The provided output lists the contents of the CMake dependency download folder (build/_deps).

$ ls -al build/_deps | grep abs
drwxr-xr-x  4 mudream mudream 4096 Sep  4 04:33 abseil_cpp-build
drwxr-xr-x  6 mudream mudream 4096 Sep  4 04:33 abseil_cpp-src
drwxr-xr-x  4 mudream mudream 4096 Sep  4 04:33 abseil_cpp-subbuild

This indicates that CMake has successfully downloaded the Abseil library.

Visual Studio Version

No response

GCC / Compiler Version

No response

[RyanUnderhill]

@yuslepukhin, in case you have any ideas on this?

[snnn]

So, the easiest fix would be upgrading ABSL to a released version?

[mudream4869]

So, the easiest fix would be upgrading ABSL to a released version?

Applying to the latest abseil LTS version seems to work. Unittest pass on ubuntu 24.04.

[snnn]

Thanks. I will make a PR.

[Manamama]

A related problem:
absl::demangle_rust error in ONNX Runtime build on Droid, Termux.
Only compiling and installing newest abseil from:
https://github.com/abseil/abseil-cpp/ worked.

Ref:
~/downloads/onnxruntime $ apt list | grep abseil WARNING: apt does not have a stable CLI interface. Use with caution in scripts. abseil-cpp/stable,now 20240116.2-1 aarch64 [installed,automatic] ~/downloads/onnxruntime $

Operating System:

• Name: Android 11 aarch64, Linux, 4.14.186+ (Termux)
• Kernel: 4.14.186+
• Shell: /data/data/com.termux/files/usr/bin/bashso
  uname -a
  Linux localhost 4.14.186+ SMP PREEMPT arch64 Android
  (Termux)

[Manamama]

Update: many other updates are needed for Termux now:

apt install boost-headers

Eigen needs to be cloned and hand compiled to get:
eigen/stable,now 3.4.0 aarch64 [installed]

export BUILD_MLAS_NO_ONNXRUNTIME=ON
A newish gcc...