icu: fix emscripten build for 71.1

[ovostrikov]

Specify library name and version: icu/71.1

Fixes #13888

There were bunch of underlying issues:

• ICU didn't recognise wasm32-*-emscripten as a host (fixed with a patch).
• ICU's autoconfig didn't properly recognize that we are cross-building (fixed by adding "--build=" parameter to build configuration in the recipe).
• ICU tools needs to be disabled for emscripten (fixed in the recipe).
• While packaging ICU data '-w' param needs to be passed in the PKGDATA_OPTS (fixed with a patch), because there is no pre-built assembly code for wasm

---

• I've read the guidelines for contributing.
• I've followed the PEP8 style guides for Python code in the recipes.
• I've used the latest Conan client version.
• I've tried at least one configuration locally with the conan-center hook activated.

[ghost]

I detected other pull requests that are modifying icu/all recipe:

• Update ICU package to support the latest release. #14030
• icu: add version 72.1 + modernize #13877

This message is automatically generated by https://github.com/ericLemanissier/conan-center-conflicting-prsso don't hesitate to report issues/improvements there.

[uilianries]

This recipe is outdated and requires some tooling update, following https://github.com/conan-io/conan-center-index/blob/master/docs/v2_linter.md guide.

All annotations which requires update are listed on https://github.com/conan-io/conan-center-index/pull/13890/files

Could you please update those outdated imports? We can help you in case you need some support.

[ovostrikov]

Seems like tooling is fixed in #13877, so I was going to wait for its completion to avoid doing same job twice.

[prince-chrismc]

Please do not force push 🙏 GitHub forces us to restart the review which is not fun!

[prince-chrismc]

A build agent hung

[conan-center-bot]

Conan v1 pipeline

All green in build 8 (66288da989effec89652ca9dc8f7c53b8d606c2e):

• icu/72.1@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  ERROR: Error loading conanfile at '/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py': Unable to load conanfile in /home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py
    File "<frozen importlib._bootstrap_external>", line 728, in exec_module
    File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
    File "/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py", line 8, in <module>
      from conans import AutoToolsBuildEnvironment
  ImportError: cannot import name 'AutoToolsBuildEnvironment' from 'conans' (/opt/pyenv/versions/3.7.13/lib/python3.7/site-packages/conans/__init__.py)
  

• icu/71.1@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  ERROR: Error loading conanfile at '/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py': Unable to load conanfile in /home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py
    File "<frozen importlib._bootstrap_external>", line 728, in exec_module
    File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
    File "/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py", line 8, in <module>
      from conans import AutoToolsBuildEnvironment
  ImportError: cannot import name 'AutoToolsBuildEnvironment' from 'conans' (/opt/pyenv/versions/3.7.13/lib/python3.7/site-packages/conans/__init__.py)
  

• icu/70.1@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  ERROR: Error loading conanfile at '/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py': Unable to load conanfile in /home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py
    File "<frozen importlib._bootstrap_external>", line 728, in exec_module
    File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
    File "/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py", line 8, in <module>
      from conans import AutoToolsBuildEnvironment
  ImportError: cannot import name 'AutoToolsBuildEnvironment' from 'conans' (/opt/pyenv/versions/3.7.13/lib/python3.7/site-packages/conans/__init__.py)
  

• icu/69.1@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  ERROR: Error loading conanfile at '/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py': Unable to load conanfile in /home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py
    File "<frozen importlib._bootstrap_external>", line 728, in exec_module
    File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
    File "/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py", line 8, in <module>
      from conans import AutoToolsBuildEnvironment
  ImportError: cannot import name 'AutoToolsBuildEnvironment' from 'conans' (/opt/pyenv/versions/3.7.13/lib/python3.7/site-packages/conans/__init__.py)
  

• icu/66.1@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  ERROR: Error loading conanfile at '/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py': Unable to load conanfile in /home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py
    File "<frozen importlib._bootstrap_external>", line 728, in exec_module
    File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
    File "/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py", line 8, in <module>
      from conans import AutoToolsBuildEnvironment
  ImportError: cannot import name 'AutoToolsBuildEnvironment' from 'conans' (/opt/pyenv/versions/3.7.13/lib/python3.7/site-packages/conans/__init__.py)
  

• icu/67.1@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  ERROR: Error loading conanfile at '/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py': Unable to load conanfile in /home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py
    File "<frozen importlib._bootstrap_external>", line 728, in exec_module
    File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
    File "/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py", line 8, in <module>
      from conans import AutoToolsBuildEnvironment
  ImportError: cannot import name 'AutoToolsBuildEnvironment' from 'conans' (/opt/pyenv/versions/3.7.13/lib/python3.7/site-packages/conans/__init__.py)
  

• icu/68.2@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  ERROR: Error loading conanfile at '/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py': Unable to load conanfile in /home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py
    File "<frozen importlib._bootstrap_external>", line 728, in exec_module
    File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
    File "/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py", line 8, in <module>
      from conans import AutoToolsBuildEnvironment
  ImportError: cannot import name 'AutoToolsBuildEnvironment' from 'conans' (/opt/pyenv/versions/3.7.13/lib/python3.7/site-packages/conans/__init__.py)
  

• icu/65.1@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  ERROR: Error loading conanfile at '/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py': Unable to load conanfile in /home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py
    File "<frozen importlib._bootstrap_external>", line 728, in exec_module
    File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
    File "/home/conan/w/prod_cci_PR-13890/recipes/icu/all/conanfile.py", line 8, in <module>
      from conans import AutoToolsBuildEnvironment
  ImportError: cannot import name 'AutoToolsBuildEnvironment' from 'conans' (/opt/pyenv/versions/3.7.13/lib/python3.7/site-packages/conans/__init__.py)