A number of environment variables can be used to configure the behavior of the library. There are also functions to configure this behavior in code. The environment variables are convenient when troubleshooting problems.
Endpoint Overrides
GOOGLE_CLOUD_CPP_CASE_ATTACHMENT_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudsupport.googleapis.com") used by MakeCaseAttachmentServiceConnection().
GOOGLE_CLOUD_CPP_CASE_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudsupport.googleapis.com") used by MakeCaseServiceConnection().
GOOGLE_CLOUD_CPP_COMMENT_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudsupport.googleapis.com") used by MakeCommentServiceConnection().
GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc: turns on tracing for most gRPC calls. The library injects an additional Stub decorator that prints each gRPC request and response. Unless you have configured your own logging backend, you should also set GOOGLE_CLOUD_CPP_ENABLE_CLOG to produce any output on the program's console.
See Also
google::cloud::LoggingComponentsOptionGOOGLE_CLOUD_CPP_TRACING_OPTIONS=...: modifies the behavior of gRPC tracing, including whether messages will be output on multiple lines, or whether string/bytes fields will be truncated.
See Also
google::cloud::GrpcTracingOptionsOptionGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes: turns on logging in the library, basically the library always "logs" but the logging infrastructure has no backend to actually print anything until the application sets a backend or they set this environment variable.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThis document provides a list of available versions for a C++ library, ranging from the latest release candidate 2.37.0-rc down to version 2.11.0, each with a corresponding link to its support environment documentation.\u003c/p\u003e\n"],["\u003cp\u003eThe library's behavior can be configured using environment variables, particularly for troubleshooting, and it also supports in-code configuration for these settings.\u003c/p\u003e\n"],["\u003cp\u003eEndpoint overrides are available via environment variables for different services such as \u003ccode\u003eGOOGLE_CLOUD_CPP_CASE_ATTACHMENT_SERVICE_ENDPOINT\u003c/code\u003e, \u003ccode\u003eGOOGLE_CLOUD_CPP_CASE_SERVICE_ENDPOINT\u003c/code\u003e, and \u003ccode\u003eGOOGLE_CLOUD_CPP_COMMENT_SERVICE_ENDPOINT\u003c/code\u003e, allowing users to specify custom endpoints.\u003c/p\u003e\n"],["\u003cp\u003eEnvironment variables like \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING\u003c/code\u003e, \u003ccode\u003eGOOGLE_CLOUD_CPP_TRACING_OPTIONS\u003c/code\u003e, and \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e can be used to manage logging and tracing within the library.\u003c/p\u003e\n"],["\u003cp\u003eWhile the environment variable \u003ccode\u003eGOOGLE_CLOUD_PROJECT\u003c/code\u003e is used in examples and tests to set the default GCP project, it does not affect the library's functionality.\u003c/p\u003e\n"]]],[],null,[]]
