[package] boost/1.79.0 does not work with Conan 2.0

[System-Arch]

Description

While much effort has gone into porting the boost recipe to Conan 2.0 syntax, the use of self.output.warn() causes fatal errors when actually trying to use it with Conan 2.0:

ERROR: conanfile.py (boost/1.79.0): Error in build() method, line 859
self._create_user_config_jam(self._boost_build_dir)
while calling '_create_user_config_jam', line 1203
self.output.warn("Patching user-config.jam")
AttributeError: 'ConanOutput' object has no attribute 'warn'

Package and Environment Details

• Package Name/Version: boost/71.1
• Operating System+version: Debian 10
• Compiler+version: GCC 10.3.0
• Conan version: conan 2.0.0-dev (pre-Beta8)
• Python version: Python 3.7.3

Conan profile

Profile host:
[settings]
arch=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++11
compiler.version=10.3
os=Linux
[options]
*:shared=True
[tool_requires]
*: gcc/10.3.0, cmake/3.24.2, ninja/1.11.0
[conf]
tools.cmake.cmaketoolchain:generator=Ninja

Profile build:
[settings]
arch=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++11
compiler.version=8
os=Linux
[options]
cmake*:bootstrap=True
[tool_requires]
!openssl*: cmake/3.24.2

Steps to reproduce

conan-2.0 build -pr:b tools.jinja -pr:h default.jinja --name boost --version 1.79.0 .

Logs

Click to expand log

conan-2.0 build -pr:b tools.jinja -pr:h default.jinja --name boost --version 1.79.0 .  # --build=never

-------- Input profiles --------
Profile host:
[settings]
arch=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++11
compiler.version=10.3
os=Linux
[options]
*:shared=True
[tool_requires]
*: gcc/10.3.0, cmake/3.24.2, ninja/1.11.0
[conf]
tools.cmake.cmaketoolchain:generator=Ninja

Profile build:
[settings]
arch=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++11
compiler.version=8
os=Linux
[options]
cmake*:bootstrap=True
[tool_requires]
!openssl*: cmake/3.24.2


-------- Computing dependency graph --------
Graph root
    conanfile.py (boost/1.79.0): /tmp/tmp.27qoV1fdf1/boost/conanfile.py
Requirements
    bzip2/1.0.8#6fbcb24c8aa5cc24cc5f1a13ba8a08bf - Cache
    libbacktrace/cci.20210118#e15db3d2e097b960da976d1b983444e4 - Cache
    zlib/1.2.13#416618fa04d433c6bd94279ed2e93638 - Cache
Build requirements
    b2/4.9.2#5a894f36e86a1e157dd8df83f1def0ea - Cache
    cmake/3.24.2#c9ca2759150e09689b6ec6e350fe3bbb - Cache
    flex/2.6.4#1c7967e3b56bc1af57b8671dac7448a1 - Cache
    gcc/10.3.0#7f89aa10c83fe66dd2bf1a9bbffc5577 - Cache
    gmp/6.2.1#1b736a3bfe5cb8eaf7c597682b11935c - Cache
    isl/0.24#8f8890a82f5af416f79113974b152e05 - Cache
    m4/1.4.19#32eb97d367f97ef9a7e873ca41988b37 - Cache
    mpc/1.2.0#4219c0a20cea391ff6e061fa810d1441 - Cache
    mpfr/4.1.0#124dc118a67c9ca33e6a58092d2e53e3 - Cache
    ninja/1.11.0#da75168088b60dc184c4bb6e66441012 - Cache
    openssl/1.1.1s#6ac50ee9e58b08be28d7deb28dbd96b9 - Cache
    zlib/1.2.13#416618fa04d433c6bd94279ed2e93638 - Cache

-------- Computing necessary packages --------
Requirements
    bzip2/1.0.8#6fbcb24c8aa5cc24cc5f1a13ba8a08bf:028a6df729eea0947ac48c1c3732498b266e1bea#cd74f44bff1b16e3d4f8c3a5be7e15b1 - Cache
    libbacktrace/cci.20210118#e15db3d2e097b960da976d1b983444e4:0b4324953d18bb5078b753b91f2488ae6cdfc53a#a0902afb5ac321dda0086f90c4a34043 - Cache
    zlib/1.2.13#416618fa04d433c6bd94279ed2e93638:0b4324953d18bb5078b753b91f2488ae6cdfc53a#0687fbd2f76ba1589e761d4a89c5a439 - Cache
Build requirements
    b2/4.9.2#5a894f36e86a1e157dd8df83f1def0ea:63fead0844576fc02943e16909f08fcdddd6f44b#73888b6d46d4c0163e8a53c06d9b76e4 - Cache
    cmake/3.24.2#c9ca2759150e09689b6ec6e350fe3bbb:99ba5f8234b5341513c60c4f500b886d4a72f667#0b1fae2bb5f1787f8e60bd798055ddf4 - Skip
    flex/2.6.4#1c7967e3b56bc1af57b8671dac7448a1:897e6fde718e72637d92b0b8ed929893a1976238#9b94dff6888ebf2ebacaeac35a8a8e03 - Skip
    gcc/10.3.0#7f89aa10c83fe66dd2bf1a9bbffc5577:df6c14c1345f6fad201fa4f4d8369cb0471cdd7b#1b8824c68e0d6553907f8e1ba52d56b4 - Cache
    gmp/6.2.1#1b736a3bfe5cb8eaf7c597682b11935c:e2042160f5f9e84f1f34511f201378289e063b83#2dfc4f3dc9c0243ecb7155e2702ef848 - Skip
    isl/0.24#8f8890a82f5af416f79113974b152e05:9ca3050f245a3bd66cd7a191c86d0d7ea547cebd#309f36733e4c08cac37b00e7b15487eb - Skip
    m4/1.4.19#32eb97d367f97ef9a7e873ca41988b37:3593751651824fb813502c69c971267624ced41a#a3d350d91e1a728cd7181c2f12b5ccb3 - Skip
    mpc/1.2.0#4219c0a20cea391ff6e061fa810d1441:95d790159428786d1c71779e5bee9788c659ea75#9df0f8a680ac8ce9363e5845c201c5d4 - Skip
    mpfr/4.1.0#124dc118a67c9ca33e6a58092d2e53e3:cc59a59152d2abf2d9dc21511523f4ee400e9670#ad8c297389cb9be777ed2a39ecb58b69 - Skip
    ninja/1.11.0#da75168088b60dc184c4bb6e66441012:3593751651824fb813502c69c971267624ced41a#0dc74834457ae37183757460a6996342 - Cache
    openssl/1.1.1s#6ac50ee9e58b08be28d7deb28dbd96b9:896855b1e3b5961bfcc08e699116d9ed588cac00#d7649fcbb2fde8241ef630423a195b81 - Skip (3p-tools)
    zlib/1.2.13#416618fa04d433c6bd94279ed2e93638:897e6fde718e72637d92b0b8ed929893a1976238#4b30748db76ec642513d35ebfecfc311 - Skip

-------- Installing packages --------

-------- Installing (downloading, building) binaries... --------
cmake/3.24.2: Already installed!
cmake/3.24.2: Appending PATH environment variable: /home/marc/.conan2/p/e0c986b48f7b7ad8/p/bin
WARN: The use of 'env_info' is deprecated in Conan 2.0 and will be removed in Conan 2.X. Please, update your recipes unless you are maintaining compatibility with Conan 1.X
b2/4.9.2: Already installed!
WARN: The use of 'env_info' is deprecated in Conan 2.0 and will be removed in Conan 2.X. Please, update your recipes unless you are maintaining compatibility with Conan 1.X
ninja/1.11.0: Already installed!
gcc/10.3.0: Already installed!
gcc/10.3.0: Creating CC env var with: /home/marc/.conan2/p/7a1d0342fb682550/p/bin/gcc-10.3.0
gcc/10.3.0: Creating CXX env var with: /home/marc/.conan2/p/7a1d0342fb682550/p/bin/g++-10.3.0
gcc/10.3.0: Creating FC env var with: /home/marc/.conan2/p/7a1d0342fb682550/p/bin/gfortran-10.3.0
gcc/10.3.0: Creating AR env var with: /home/marc/.conan2/p/7a1d0342fb682550/p/bin/gcc-ar-10.3.0
gcc/10.3.0: Creating NM env var with: /home/marc/.conan2/p/7a1d0342fb682550/p/bin/gcc-nm-10.3.0
gcc/10.3.0: Creating RANLIB env var with: /home/marc/.conan2/p/7a1d0342fb682550/p/bin/gcc-ranlib-10.3.0
WARN: The use of 'env_info' is deprecated in Conan 2.0 and will be removed in Conan 2.X. Please, update your recipes unless you are maintaining compatibility with Conan 1.X
WARN: The use of 'env_info' is deprecated in Conan 2.0 and will be removed in Conan 2.X. Please, update your recipes unless you are maintaining compatibility with Conan 1.X
WARN: The use of 'env_info' is deprecated in Conan 2.0 and will be removed in Conan 2.X. Please, update your recipes unless you are maintaining compatibility with Conan 1.X
WARN: The use of 'env_info' is deprecated in Conan 2.0 and will be removed in Conan 2.X. Please, update your recipes unless you are maintaining compatibility with Conan 1.X
WARN: The use of 'env_info' is deprecated in Conan 2.0 and will be removed in Conan 2.X. Please, update your recipes unless you are maintaining compatibility with Conan 1.X
WARN: The use of 'env_info' is deprecated in Conan 2.0 and will be removed in Conan 2.X. Please, update your recipes unless you are maintaining compatibility with Conan 1.X
bzip2/1.0.8: Already installed!
WARN: The use of 'cpp_info.names' is deprecated in Conan 2.0 and will be removed in Conan 2.X. Please, update your recipes unless you are maintaining compatibility with Conan 1.X
WARN: The use of 'cpp_info.names' is deprecated in Conan 2.0 and will be removed in Conan 2.X. Please, update your recipes unless you are maintaining compatibility with Conan 1.X
WARN: The use of 'cpp_info.build_modules' is deprecated in Conan 2.0 and will be removed in Conan 2.X. Please, update your recipes unless you are maintaining compatibility with Conan 1.X
WARN: The use of 'env_info' is deprecated in Conan 2.0 and will be removed in Conan 2.X. Please, update your recipes unless you are maintaining compatibility with Conan 1.X
libbacktrace/cci.20210118: Already installed!
zlib/1.2.13: Already installed!
WARN: The use of 'cpp_info.names' is deprecated in Conan 2.0 and will be removed in Conan 2.X. Please, update your recipes unless you are maintaining compatibility with Conan 1.X
WARN: The use of 'cpp_info.names' is deprecated in Conan 2.0 and will be removed in Conan 2.X. Please, update your recipes unless you are maintaining compatibility with Conan 1.X

-------- Finalizing install (deploy, generators) --------
conanfile.py (boost/1.79.0): Calling generate()
conanfile.py (boost/1.79.0): Aggregating env generators
conanfile.py (boost/1.79.0): Calling build()
conanfile.py (boost/1.79.0): WARN: replace_in_file didn't find pattern '/* thread_local */' in '/tmp/tmp.27qoV1fdf1/boost/src/boost/stacktrace/detail/libbacktrace_impls.hpp' file.
conanfile.py (boost/1.79.0): WARN: replace_in_file didn't find pattern '/* static __thread */' in '/tmp/tmp.27qoV1fdf1/boost/src/boost/stacktrace/detail/libbacktrace_impls.hpp' file.
conanfile.py (boost/1.79.0): WARN: replace_in_file didn't find pattern 'local generic-os = [ set.difference $(all-os) : aix darwin vxworks solaris osf hpux ] ;' in '/tmp/tmp.27qoV1fdf1/boost/src/tools/build/src/tools/gcc.jam' file.
conanfile.py (boost/1.79.0): WARN: replace_in_file didn't find pattern 'local no-threading = android beos haiku sgi darwin vxworks ;' in '/tmp/tmp.27qoV1fdf1/boost/src/tools/build/src/tools/gcc.jam' file.
ERROR: conanfile.py (boost/1.79.0): Error in build() method, line 859
        self._create_user_config_jam(self._boost_build_dir)
while calling '_create_user_config_jam', line 1203
        self.output.warn("Patching user-config.jam")
        AttributeError: 'ConanOutput' object has no attribute 'warn'
ERROR: Conan-2.0 build failed for 'boost'```

</details>

[SpaceIm]

#14819 should fix this issue.