cmake: fix Linux pre-fill `HAVE_POSIX_STRERROR_R` (when `_CURL_PREFILL=ON`)

It depends on C library.

Follow-up to f30f1307c1d9d70a96557359f039ba7ef9b077fb #19116

diff --git a/CMake/unix-cache.cmake b/CMake/unix-cache.cmake
index a0369e84e52f5d3c8e41001da4bc743443ee424c..556e871a03cc0246e5bae5cf40a27598d15938b7 100644 (file)
--- a/CMake/unix-cache.cmake
+++ b/CMake/unix-cache.cmake
@@ -204,7 +204,7 @@ endif()
 set(HAVE_POLL 1)
 set(HAVE_POLL_H 1)
 if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
-  set(HAVE_POSIX_STRERROR_R 0)
+  # Depends on C library.
 else()
   set(HAVE_POSIX_STRERROR_R 1)
 endif()