cmake: add comments to feature check options applied globally

Add comments saying when we want values set in feature check option
variables to apply to all feature checks, globally. These are currently:
`ws2_32` and `socket` libraries, and `-D_WIN32_WINNT=` macro.

Also use `list(APPEND ...)` for the libraries to avoid overwriting
potentially existing values.

Cherry-picked from #15157
Closes #15253
This commit is contained in:
Viktor Szakats 2024-10-05 13:59:28 +02:00
parent 447bcea5a4
commit 6074e33509
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2 changed files with 5 additions and 5 deletions

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@ -31,7 +31,7 @@ macro(check_include_file_concat _file _variable)
check_include_files("${CURL_INCLUDES};${_file}" ${_variable})
if(${_variable})
set(CURL_INCLUDES ${CURL_INCLUDES} ${_file})
set(CURL_TEST_DEFINES "${CURL_TEST_DEFINES} -D${_variable}")
set(CURL_TEST_DEFINES "${CURL_TEST_DEFINES} -D${_variable}") # Apply to curl_internal_test()
endif()
endmacro()