Issue in libyang compilation for FRR

[ChinmayaAgarwal]

Description

We are trying to cross-compile libyang 2.1.128 for FRR using custom toolchain and sysroot where we are facing issue with build not able to find PCRE2_LIBRARY

CMake Error at /usr/share/cmake-3.16/Modules/FindPackageHandleStandardArgs.cmake:146 (message): Could NOT find PCRE2 (missing: PCRE2_LIBRARY) (Required is at least version "10.21") Call Stack (most recent call first): /usr/share/cmake-3.16/Modules/FindPackageHandleStandardArgs.cmake:393 (_FPHSA_FAILURE_MESSAGE) CMakeModules/FindPCRE2.cmake:63 (find_package_handle_standard_args) CMakeLists.txt:405 (find_package)

What are the ways include PCRE2_LIBRARY ?

Version

Frr 10.0

How to reproduce

Cross compile frr on power pc architecture

Expected behavior

Libyang should have built successfully

Actual behavior

CMake Error at /usr/share/cmake-3.16/Modules/FindPackageHandleStandardArgs.cmake:146 (message): Could NOT find PCRE2 (missing: PCRE2_LIBRARY) (Required is at least version "10.21") Call Stack (most recent call first): /usr/share/cmake-3.16/Modules/FindPackageHandleStandardArgs.cmake:393 (_FPHSA_FAILURE_MESSAGE) CMakeModules/FindPCRE2.cmake:63 (find_package_handle_standard_args) CMakeLists.txt:405 (find_package)

Additional context

No response

Checklist

• [X] I have searched the open issues for this bug.
• [X] I have not included sensitive information in this report.

[ton31337]

How do you build? You should include --enable-pcre2posix.

[donaldsharp]

Please open an issue with the libyang people. This is not the appropriate place to get help for libyang2 issues.

[ChinmayaAgarwal]

We have been able to compile libyang successfully. We are following FRR's link for cross compilation (https://docs.frrouting.org/projects/dev-guide/en/latest/cross-compiling.html). We have been able to configure (../configure --enable-clippy-only) clippy but facing below issue in "make clippy-only": -

Must remake target 'lib/clippy'.
  CCLD     lib/clippy
lib/lib_clippy-defun_lex.o: In function `clippy_parse':
/root/frr/build-clippy/../lib/defun_lex.l:239: undefined reference to `PyArg_ParseTuple'
/root/frr/build-clippy/../lib/defun_lex.l:252: undefined reference to `PyDict_New'
/root/frr/build-clippy/../lib/defun_lex.l:253: undefined reference to `PyList_New'
/root/frr/build-clippy/../lib/defun_lex.l:254: undefined reference to `PyUnicodeUCS2_FromString'
/root/frr/build-clippy/../lib/defun_lex.l:254: undefined reference to `PyDict_SetItemString'
/root/frr/build-clippy/../lib/defun_lex.l:255: undefined reference to `PyDict_SetItemString'
/root/frr/build-clippy/../lib/defun_lex.l:283: undefined reference to `PyDict_New'
/root/frr/build-clippy/../lib/defun_lex.l:284: undefined reference to `PyUnicodeUCS2_FromString'
/root/frr/build-clippy/../lib/defun_lex.l:284: undefined reference to `PyDict_SetItemString'
/root/frr/build-clippy/../lib/defun_lex.l:285: undefined reference to `PyUnicodeUCS2_FromString'
/root/frr/build-clippy/../lib/defun_lex.l:285: undefined reference to `PyDict_SetItemString'
/root/frr/build-clippy/../lib/defun_lex.l:290: undefined reference to `PyLong_FromLong'
/root/frr/build-clippy/../lib/defun_lex.l:290: undefined reference to `PyDict_SetItemString'
/root/frr/build-clippy/../lib/defun_lex.l:291: undefined reference to `PyList_Append'
lcollect2: error: ld returned 1 exit status
Makefile:7576: recipe for target 'lib/clippy' failed
make: *** [lib/clippy] Error 1
root@mclican-fsl-toolchain:~/frr/build-clippy#

However, we have resolved the python dependencies while configuring clippy but facing python related issue again during make. Any pointers here to resolve this issue?