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cmake: use gflags package config instead of a find module

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This allows to avoid conflicts between third party gflags find modules floating
around. If a package provide a local version of gflags find module, clients
which locate glog will incorrectly use it. Another problem is a CMake error message
"cmake_policy PUSH without matching POP" in nested find_package calls. In summary,
we need to ensure to use the original gflags package config.
This commit is contained in:
Sergiu Deitsch 2018-01-04 02:37:49 +01:00
parent b2c3afecaa
commit a92e1d95c5
2 changed files with 13 additions and 2 deletions
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13
CMakeLists.txt
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@ -599,8 +599,19 @@ install (TARGETS glog
LIBRARY DESTINATION ${_glog_CMake_LIBDIR}
ARCHIVE DESTINATION ${_glog_CMake_LIBDIR})
set (glog_POLICY_VERSION 3.0)
if (gflags_FOUND)
set (gflags_DEPENDENCY "find_dependency (gflags ${gflags_VERSION})")
# Ensure clients locate only the package config and not third party find
# modules having the same name. This avoid cmake_policy PUSH/POP errors.
if (CMAKE_VERSION VERSION_LESS 3.9)
set (gflags_DEPENDENCY "find_dependency (gflags ${gflags_VERSION})")
else (CMAKE_VERSION VERSION_LESS 3.9)
# Passing additional find_package arguments to find_dependency is possible
# starting with CMake 3.9.
set (glog_POLICY_VERSION 3.9)
set (gflags_DEPENDENCY "find_dependency (gflags ${gflags_VERSION} NO_MODULE)")
endif (CMAKE_VERSION VERSION_LESS 3.9)
endif (gflags_FOUND)
configure_package_config_file (glog-config.cmake.in

2
glog-config.cmake.in
View File

@ -1,5 +1,5 @@
cmake_policy (PUSH)
cmake_policy (VERSION 3.0)
cmake_policy (VERSION @glog_POLICY_VERSION@)
@PACKAGE_INIT@