libzeep is not able to build

[rytakahas]

Following the build instruction, first libzeep is need to be install.

cmake version 3.26.3 c++ (conda-forge gcc 12.2.0-19) 12.2.0

Copyright (C) 2022 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

I got following errors

cmake .. -DZEEP_BUILD_TESTS=ON
Using resources compiled with ./local/bin/mrc
-- Found Boost:alphafill/lib/cmake/Boost-1.78.0/BoostConfig.cmake (found suitable version "1.78.0", minimum required is "1.70.0")  
CMake Error at CMakeLists.txt:74 (find_package):
  By not providing "Finddate.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "date", but
  CMake did not find one.

  Could not find a package configuration file provided by "date" with any of
  the following names:

    dateConfig.cmake
    date-config.cmake

  Add the installation prefix of "date" to CMAKE_PREFIX_PATH or set
  "date_DIR" to a directory containing one of the above files.  If "date"
  provides a separate development package or SDK, be sure it has been
  installed.

-- Configuring incomplete, errors occurred!
(alphafill) ~/software/libzeep/build$ cd ..
(alphafill) ~/software/libzeep$ rm -rf build/
(alphafill) ~/software/libzeep$ mkdir build
(alphafill) ~/software/libzeep$ cd build/
(alphafill) ~/software/libzeep/build$ ls
(alphafill) ~/software/libzeep/build$ cmake .. -DZEEP_BUILD_TESTS=ON
-- The CXX compiler identification is GNU 12.2.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler:alphafill/bin/x86_64-conda-linux-gnu-c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Looking for C++ include filesystem
-- Looking for C++ include filesystem - found
-- Performing Test CXX_FILESYSTEM_NO_LINK_NEEDED
-- Performing Test CXX_FILESYSTEM_NO_LINK_NEEDED - Success
Using resources compiled with /.local/bin/mrc
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE  
-- Found Boost: alphafill/lib/cmake/Boost-1.78.0/BoostConfig.cmake (found suitable version "1.78.0", minimum required is "1.70.0")  
CMake Error at CMakeLists.txt:74 (find_package):
  By not providing "Finddate.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "date", but
  CMake did not find one.

  Could not find a package configuration file provided by "date" with any of
  the following names:

    dateConfig.cmake
    date-config.cmake

  Add the installation prefix of "date" to CMAKE_PREFIX_PATH or set
  "date_DIR" to a directory containing one of the above files.  If "date"
  provides a separate development package or SDK, be sure it has been
  installed.

-- Configuring incomplete, errors occurred!

Which data are required?

Also, in the CMakeLists.txt, -"lstdc++fs -std=c++17" these flags should be required

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -44,9 +44,9 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)

 if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers")
+       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -lstdc++fs -std=c++17")
 elseif(MSVC)
-       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
+       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4 -lstdc++fs -std=c++17")
 endif()

[mhekkel]

the date library needed is Howard Hinnants date library:

https://github.com/HowardHinnant/date

This might also be installed using the package manager of your OS.

I will update the readme to make this information more clear.