[bug] header_only packages fail with no shared artifacts KB-H074

[prince-chrismc]

          ### Conan v1 pipeline :x:

Failure in build 6 (7f7b257dfb198a371130108a00ed5e2e4ca89e8a):

• cglm/0.8.5@:
  Didn't run or was cancelled before finishing

• cglm/0.8.9@:
  CI failed to create some packages (All logs)

  Logs for packageID 5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9:

  [settings]
  arch=x86_64
  build_type=Release
  compiler=gcc
  compiler.libcxx=libstdc++11
  compiler.version=5
  os=Linux
  [options]
  cglm:header_only=True
  

  [...]
  tools.system.package_manager:mode=install
  tools.system.package_manager:sudo=True
  
  cglm/0.8.9: Forced build from source
  Installing package: cglm/0.8.9
  Requirements
      cglm/0.8.9 from local cache - Cache
  Packages
      cglm/0.8.9:5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9 - Build
  
  Installing (downloading, building) binaries...
  [HOOK - conan-center.py] pre_source(): [IMMUTABLE SOURCES (KB-H010)] OK
  cglm/0.8.9: Configuring sources in /home/conan/w/prod/BuildSingleReference/.conan/data/cglm/0.8.9/_/_/source
  cglm/0.8.9: 
  [HOOK - conan-center.py] post_source(): [LIBCXX MANAGEMENT (KB-H011)] OK
  [HOOK - conan-center.py] post_source(): [CPPSTD MANAGEMENT (KB-H022)] OK
  [HOOK - conan-center.py] post_source(): [SHORT_PATHS USAGE (KB-H066)] OK
  cglm/0.8.9: Copying sources to build folder
  cglm/0.8.9: Building your package in /home/conan/w/prod/BuildSingleReference/.conan/data/cglm/0.8.9/_/_/build/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9
  cglm/0.8.9: Generator txt created conanbuildinfo.txt
  cglm/0.8.9: Calling generate()
  cglm/0.8.9: Aggregating env generators
  [HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK. 'fPIC' option found and apparently well managed
  [HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK
  cglm/0.8.9: Calling build()
  cglm/0.8.9: Package '5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9' built
  cglm/0.8.9: Build folder /home/conan/w/prod/BuildSingleReference/.conan/data/cglm/0.8.9/_/_/build/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9
  cglm/0.8.9: Generated conaninfo.txt
  cglm/0.8.9: Generated conanbuildinfo.txt
  cglm/0.8.9: Generating the package
  cglm/0.8.9: Package folder /home/conan/w/prod/BuildSingleReference/.conan/data/cglm/0.8.9/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9
  cglm/0.8.9: Calling package()
  cglm/0.8.9: Copied 1 file: LICENSE
  cglm/0.8.9: Copied 1 '.modulemap' file: module.modulemap
  cglm/0.8.9: Copied 147 '.h' files
  [HOOK - conan-center.py] post_package(): [PACKAGE LICENSE (KB-H012)] OK
  [HOOK - conan-center.py] post_package(): [DEFAULT PACKAGE LAYOUT (KB-H013)] OK
  [HOOK - conan-center.py] post_package(): [MATCHING CONFIGURATION (KB-H014)] OK
  [HOOK - conan-center.py] post_package(): [SHARED ARTIFACTS (KB-H015)] OK
  [HOOK - conan-center.py] post_package(): [EITHER STATIC OR SHARED OF EACH LIB (KB-H076)] OK
  [HOOK - conan-center.py] post_package(): [PC-FILES (KB-H020)] OK
  [HOOK - conan-center.py] post_package(): [CMAKE-MODULES-CONFIG-FILES (KB-H016)] OK
  [HOOK - conan-center.py] post_package(): [PDB FILES NOT ALLOWED (KB-H017)] OK
  [HOOK - conan-center.py] post_package(): [LIBTOOL FILES PRESENCE (KB-H018)] OK
  [HOOK - conan-center.py] post_package(): [MS RUNTIME FILES (KB-H021)] OK
  [HOOK - conan-center.py] post_package(): [SHORT_PATHS USAGE (KB-H066)] OK
  [HOOK - conan-center.py] post_package(): [MISSING SYSTEM LIBS (KB-H043)] OK
  [HOOK - conan-center.py] post_package(): [APPLE RELOCATABLE SHARED LIBS (KB-H077)] OK
  [HOOK - conan-center.py] post_package(): ERROR: [STATIC ARTIFACTS (KB-H074)] Package with 'shared=False' option did not contain any static artifact (https://github.com/conan-io/conan-center-index/blob/master/docs/error_knowledge_base.md#KB-H074-STATIC-ARTIFACTS) 
  ERROR: [HOOK - conan-center.py] post_package(): Some checks failed running the hook, check the output
  

---

^{Note: To save resources, CI tries to finish as soon as an error is found. For this reason you might find that not all the references have been launched or not all the configurations for a given reference. Also, take into account that we cannot guarantee the order of execution as it depends on CI workload and workers availability.}

Originally posted by @conan-center-bot in conan-io/conan-center-index#16738 (comment)