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cmake: Fail loudly when found rapidjson is too old (#646)

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When the rapidjson found by cmake is an older version it defines a
variable RAPIDJSON_INCLUDE_DIRS instead of RapidJSON_INCLUDE_DIRS (#455).
According to #383 we do not want to make these older version work with
ccls. However currently if the rapidjson found by cmake is an older
version that defined RAPIDJSON_INCLUDE_DIRS, then the cmake invocation
still succeeds but any build command will fail because
RapidJSON_INCLUDE_DIRS was never set properly. This makes the cmake
invocation fail with a relevant error message in this event.
This commit is contained in:
Victor Sui 2020-06-14 23:15:48 -07:00 committed by Fangrui Song
parent c5acf62060
commit 7a05f1ed06
1 changed files with 3 additions and 0 deletions
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CMakeLists.txt
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@ -151,6 +151,9 @@ set_property(SOURCE src/utils.cc APPEND PROPERTY COMPILE_DEFINITIONS
if(USE_SYSTEM_RAPIDJSON)
find_package(RapidJSON QUIET)
if(NOT DEFINED RapidJSON_INCLUDE_DIRS AND DEFINED RAPIDJSON_INCLUDE_DIRS)
message(FATAL_ERROR "RapidJSON version is likely too old. See https://github.com/MaskRay/ccls/issues/455")
endif()
endif()
if(NOT RapidJSON_FOUND)
set(RapidJSON_INCLUDE_DIRS third_party/rapidjson/include)