[bug] in Ubuntu, clang, Ninja enviornment. ERROR: pulseaudio/14.2: Error in build() method, line 131

[wbfw109]

Describe the bug

OS:Ubuntu 22.04 or 24.04 LTS

profile

[settings]
arch=x86_64
build_type=Debug
compiler=clang
compiler.version=18
compiler.cstd=23
compiler.cppstd=23
compiler.libcxx=libc++
os=Linux

[conf]
tools.cmake.cmaketoolchain:generator=Ninja

[buildenv]
CC=(path)/usr/bin/clang
CXX=(path)/usr/bin/clang++

conanfile.py

import os

from conan import ConanFile
from conan.tools.build import check_max_cppstd, check_min_cppstd
from conan.tools.cmake import CMake, CMakeDeps, CMakeToolchain, cmake_layout
from conan.tools.env import Environment
from conan.tools.files import copy, get
from conan.tools.gnu import AutotoolsToolchain
from conan.tools.scm import Git

class cpp_studyRecipe(ConanFile):
    name = "cpp_study"
    version = "0.1"
    package_type = "application"

    # Optional metadata
    license = "Apache License 2.0"
    author = ""
    url = ""
    description = "Cpp study"
    topics = ("cpp", "opencv", "vision")

    # Binary configuration
    settings = "os", "compiler", "build_type", "arch"

    options = {"shared": [True, False], "fPIC": [True, False]}

    default_options = {
        "shared": False,
        # "fPIC": True}
        "fPIC": False,
    }

    # Sources are located in the same place as this recipe, copy them to the recipe
    exports_sources = "CMakeLists.txt", "src/*"

    def config_options(self):
        if self.settings.os == "Windows":
            del self.options.fPIC

    def configure(self):
        if self.options.shared:
            # If os=Windows, fPIC will have been removed in config_options()
            # use rm_safe to avoid double delete errors
            self.options.rm_safe("fPIC")

    def layout(self):
        cmake_layout(self)

    def requirements(self):
        self.requires("opencv/[^4.10.0]")
        self.requires("fmt/[^11.0.2]")
        self.requires("pulseaudio/[^14.0]")

        self.test_requires("gtest/1.11.0")

        # self.requires("libmp3lame/[^3.100]")

    def build_requirements(self):
        self.tool_requires("cmake/[^3.30.1]")
        self.tool_requires("ninja/[^1.12.1]")

    def validate(self):
        check_min_cppstd(self, "23")
        check_max_cppstd(self, "23")

    # https://stackoverflow.com/questions/71548337/how-to-choose-ninja-as-cmake-generator-with-conan
    def generate(self):
        deps = CMakeDeps(self)
        deps.generate()
        tc = CMakeToolchain(self)
        tc.generate()

    def build(self):
        cmake = CMake(self)
        cmake.configure()
        cmake.build()

    def package(self):
        cmake = CMake(self)
        cmake.install()
        copy(
            self,
            "LICENSE",
            src=self.source_folder,
            dst=os.path.join(self.package_folder, "licenses"),
        )

How to reproduce it

when use 'conan install . --build=missing' with the profile,

pulseaudio/14.2: Building from source pulseaudio/14.2: Package pulseaudio/14.2:11163bd72edfa8a64f1022d859d8f33bc067da22 pulseaudio/14.2: Copying sources to build folder pulseaudio/14.2: Building your package in /home/wbfw109v2/.conan2/p/b/pulsea584a6dafc735/b pulseaudio/14.2: Calling generate() pulseaudio/14.2: Generators folder: /home/wbfw109v2/.conan2/p/b/pulsea584a6dafc735/b/build-debug/conan pulseaudio/14.2: Generating aggregated env files pulseaudio/14.2: Generated aggregated env files: ['conanbuild.sh'] pulseaudio/14.2: Calling build() pulseaudio/14.2: RUN: "/home/wbfw109v2/.conan2/p/b/pulsea584a6dafc735/b/src/configure" --disable-shared --enable-static --prefix=/ '--bindir=${prefix}/bin' '--sbindir=${prefix}/bin' '--libdir=${prefix}/lib' '--includedir=${prefix}/include' '--oldincludedir=${prefix}/include' --enable-shared=no --enable-static=yes --enable-glib2=no --with-fftw=no '--with-udev-rules-dir=${prefix}/bin/udev/rules.d' --with-systemduserunitdir=/home/wbfw109v2/.conan2/p/b/pulsea584a6dafc735/b/build-debug/ignore --enable-alsa=yes --enable-x11=yes --enable-openssl=yes --enable-dbus=no '--libexecdir=${prefix}/bin' checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /usr/bin/mkdir -p checking for gawk... no checking for mawk... mawk checking whether make sets $(MAKE)... yes checking whether make supports nested variables... yes checking whether UID '1000' is supported by ustar format... yes checking whether GID '1000' is supported by ustar format... yes checking how to create a ustar tar archive... gnutar checking whether to enable maintainer-specific portions of Makefiles... yes checking for stow... no checking whether make supports nested variables... (cached) yes checking whether ln -s works... yes checking for gcc... /usr/bin/clang checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether /usr/bin/clang accepts -g... yes checking for /usr/bin/clang option to accept ISO C89... none needed checking whether /usr/bin/clang understands -c and -o together... yes checking whether make supports the include directive... yes (GNU style) checking dependency style of /usr/bin/clang... gcc3 checking whether we are using the GNU C++ compiler... yes checking whether /usr/bin/clang++ accepts -g... yes checking dependency style of /usr/bin/clang++... gcc3 checking how to run the C preprocessor... /usr/bin/clang -E checking for grep that handles long lines and -e... /usr/bin/grep checking for egrep... /usr/bin/grep -E checking whether /usr/bin/clang needs -traditional... no checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking minix/config.h usability... no checking minix/config.h presence... no checking for minix/config.h... no checking whether it is safe to define EXTENSIONS... yes checking whether /usr/bin/clang++ supports C++11 features by default... yes checking for gm4... /home/wbfw109v2/.conan2/p/b/m4838c7df5f758c/p/bin/m4 checking pkg-config is at least version 0.9.0... yes checking for a sed that does not truncate output... /usr/bin/sed checking whether NLS is requested... yes checking for msgfmt... /home/wbfw109v2/.conan2/p/b/gette6532680a6b0b4/p/bin/msgfmt checking for gmsgfmt... /home/wbfw109v2/.conan2/p/b/gette6532680a6b0b4/p/bin/msgfmt checking for xgettext... /home/wbfw109v2/.conan2/p/b/gette6532680a6b0b4/p/bin/xgettext checking for msgmerge... /home/wbfw109v2/.conan2/p/b/gette6532680a6b0b4/p/bin/msgmerge checking build system type... x86_64-pc-linux-gnu checking host system type... x86_64-pc-linux-gnu checking for ld used by /usr/bin/clang... /usr/bin/ld checking if the linker (/usr/bin/ld) is GNU ld... yes checking for shared library run path origin... done checking for CFPreferencesCopyAppValue... no checking for CFLocaleCopyCurrent... no checking for GNU gettext in libc... yes checking whether to use NLS... yes checking where the gettext function comes from... libc checking host operating system... linux checking whether C compiler accepts -std=gnu11... no configure: error: *** Compiler does not support -std=gnu11 pulseaudio/14.2: ERROR: Package '11163bd72edfa8a64f1022d859d8f33bc067da22' build failed ERROR: pulseaudio/14.2: Error in build() method, line 131 autotools.configure() ConanException: Error 1 while executing

[memsharded]

Hi @wbfw109

Thanks for your feedback.

This might not be an issue of Conan itself, but instead an issue of ConanCenter recipes from the conan-center-index repository. In that case we will move the ticket to that repo.

The thing is that it is possible that some recipes do not build with some different configuration, ConanCenter builds and test a bunch of them but not all.

I am trying to reproduce, but I got a different error in one of the dependencies that builds first, flac/1.4.2:

flac/1.4.2: RUN: cmake -G "Ninja" -DCMAKE_TOOLCHAIN_FILE="generators/conan_toolchain.cmake" -DCMAKE_INSTALL_PREFIX="/home/user/.conan2/p/b/flac9e75eca4c6fbc/p" -DCMAKE_POLICY_DEFAULT_CMP0077="NEW" -DCMAKE_POLICY_DEFAULT_CMP0091="NEW" -DCMAKE_BUILD_TYPE="Debug" "/home/user/.conan2/p/b/flac9e75eca4c6fbc/b/src"
-- Using Conan toolchain: /home/user/.conan2/p/b/flac9e75eca4c6fbc/b/build/Debug/generators/conan_toolchain.cmake
-- Conan toolchain: Setting CMAKE_POSITION_INDEPENDENT_CODE=ON (options.fPIC)
-- Conan toolchain: Defining architecture flag: -m64
-- Conan toolchain: Defining libcxx as C++ flags: -stdlib=libc++
-- Conan toolchain: C++ Standard 23 with extensions OFF
-- Conan toolchain: Setting BUILD_SHARED_LIBS = OFF
-- The C compiler identification is Clang 14.0.0
-- The CXX compiler identification is Clang 14.0.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/clang - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - failed
-- Check for working CXX compiler: /usr/bin/clang++
-- Check for working CXX compiler: /usr/bin/clang++ - broken
CMake Error at /home/user/.envs/conan2/lib/python3.10/site-packages/cmake/data/share/cmake-3.25/Modules/CMakeTestCXXCompiler.cmake:63 (message):
  The C++ compiler

    "/usr/bin/clang++"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: /home/user/.conan2/p/b/flac9e75eca4c6fbc/b/build/Debug/CMakeFiles/CMakeScratch/TryCompile-JmuFRA

    Run Build Command(s):/usr/bin/ninja cmTC_8631b && [1/2] Building CXX object CMakeFiles/cmTC_8631b.dir/testCXXCompiler.cxx.o
    [2/2] Linking CXX executable cmTC_8631b
    FAILED: cmTC_8631b
    : && /usr/bin/clang++ -m64 -stdlib=libc++ -m64 CMakeFiles/cmTC_8631b.dir/testCXXCompiler.cxx.o -o cmTC_8631b   && :
    /usr/bin/ld: cannot find -lc++: No such file or directory
    clang: error: linker command failed with exit code 1 (use -v to see invocation)
    ninja: build stopped: subcommand failed.

Can you please share your full output? Conan 2 is assumed here, but please clarify your exact Conan version.

[wbfw109]

Thank @memsharded for comment .

After creating this post, I discovered the existence of the conan-center-index repository, and I believe the issue may be related to that repository. Therefore, I have posted the problem in the issue there. All the relevant environment details and content are clearly specified, so please refer to it there for more information. https://github.com/conan-io/conan-center-index/issues/25075

Since I have already posted more specific details in that repository, I will monitor the situation and close this issue here myself soon.

Thank you for your response and for testing. : )

[memsharded]

Thanks for the details there, I have now been able to pass that flac build error, I was missing libc++-dev libc++abi-dev in my Linux machine.

[memsharded]

I have successfully built it with my clang 14 in my Ubuntu 22.04 The output passes with:

checking where the gettext function comes from... libc
checking host operating system... linux
checking whether C compiler accepts -std=gnu11... yes

Is it possible that such modern clang 18 version might have removed support for the (relative) old gnu11? Why the

``configure: error: *** Compiler does not support -std=gnu11``
```?