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Add automatic versioning to Cmake (#505)

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It pulls the version from the user-agent string in the header, so it
will not need to be manually adjusted. This version file is installed so
that you can check for a specific version with find_package(httplib)

Also added HTTPLIB_INCLUDE_DIR (root path without header name), and
HTTPLIB_LIBRARY (only if compiled).

Added HTTPLIB_VERSION, and HTTPLIB_FOUND (although it's recommended
to check if the target exists).

Updated CMakeLists documentation for all this.
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KTGH 2020-05-28 17:09:20 -04:00 • committed by GitHub
parent d9fe3fa020
commit 5fcd8f7795
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2 changed files with 68 additions and 5 deletions
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35
httplibConfig.cmake.in
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@ -6,6 +6,7 @@
set(HTTPLIB_IS_USING_OPENSSL @HTTPLIB_IS_USING_OPENSSL@)
set(HTTPLIB_IS_USING_ZLIB @HTTPLIB_IS_USING_ZLIB@)
set(HTTPLIB_IS_COMPILED @HTTPLIB_COMPILE@)
set(HTTPLIB_VERSION @PROJECT_VERSION@)
include(CMakeFindDependencyMacro)
@ -25,9 +26,41 @@ if(@HTTPLIB_IS_USING_ZLIB@)
find_dependency(ZLIB REQUIRED)
endif()
# Lets the end-user find the header path if needed
# Mildly useful for end-users
# Not really recommended to be used though
set_and_check(HTTPLIB_INCLUDE_DIR "@PACKAGE_CMAKE_INSTALL_FULL_INCLUDEDIR@")
# Lets the end-user find the header path with the header appended
# This is helpful if you're using Cmake's pre-compiled header feature
set_and_check(HTTPLIB_HEADER_PATH "@PACKAGE_CMAKE_INSTALL_FULL_INCLUDEDIR@/httplib.h")
# Brings in the target library
include("${CMAKE_CURRENT_LIST_DIR}/httplibTargets.cmake")
# Ouputs a "found httplib /usr/include/httplib.h" message when using find_package(httplib)
include(FindPackageMessage)
if(TARGET httplib::httplib)
set(HTTPLIB_FOUND TRUE)
# Since the compiled version has a lib, show that in the message
if(@HTTPLIB_COMPILE@)
# The list of configurations is most likely just 1 unless they installed a debug & release
get_target_property(_httplib_configs httplib::httplib "IMPORTED_CONFIGURATIONS")
# Need to loop since the "IMPORTED_LOCATION" property isn't want we want.
# Instead, we need to find the IMPORTED_LOCATION_RELEASE or IMPORTED_LOCATION_DEBUG which has the lib path.
foreach(_httplib_conf "${_httplib_configs}")
# Grab the path to the lib and sets it to HTTPLIB_LIBRARY
get_target_property(HTTPLIB_LIBRARY httplib::httplib "IMPORTED_LOCATION_${_httplib_conf}")
# Check if we found it
if(HTTPLIB_LIBRARY)
break()
endif()
endforeach()
unset(_httplib_configs)
unset(_httplib_conf)
find_package_message(httplib "Found httplib: ${HTTPLIB_LIBRARY} (found version \"${HTTPLIB_VERSION}\")" "[${HTTPLIB_LIBRARY}][${HTTPLIB_HEADER_PATH}]")
else()
find_package_message(httplib "Found httplib: ${HTTPLIB_HEADER_PATH} (found version \"${HTTPLIB_VERSION}\")" "[${HTTPLIB_HEADER_PATH}]")
endif()
endif()