cmake: do not install wcurl when BUILD_CURL_EXE=OFF

Skip installing `wcurl.1` also.

Reported-by: Daniel Schulte
Fixes #21458
Follow-up to 23bed347b3 #17035

Closes #21459

CMakeLists.txt

@@ -2428,12 +2428,14 @@ if(NOT CURL_DISABLE_INSTALL)
       COMMAND ${CMAKE_COMMAND} -P "${CMAKE_CURRENT_BINARY_DIR}/CMake/cmake_uninstall.cmake")
   endif()
 
-  install(FILES "${PROJECT_SOURCE_DIR}/scripts/wcurl"
-    DESTINATION ${CMAKE_INSTALL_BINDIR}
-    PERMISSIONS
-      OWNER_READ OWNER_WRITE OWNER_EXECUTE
-      GROUP_READ GROUP_EXECUTE
-      WORLD_READ WORLD_EXECUTE)
+  if(BUILD_CURL_EXE)
+    install(FILES "${PROJECT_SOURCE_DIR}/scripts/wcurl"
+      DESTINATION ${CMAKE_INSTALL_BINDIR}
+      PERMISSIONS
+        OWNER_READ OWNER_WRITE OWNER_EXECUTE
+        GROUP_READ GROUP_EXECUTE
+        WORLD_READ WORLD_EXECUTE)
+  endif()
 
   # The `-DEV` part is important
   string(REGEX REPLACE "([0-9]+\.[0-9]+)\.([0-9]+.*)" "\\2" CPACK_PACKAGE_VERSION_PATCH "${_curl_version}")

docs/CMakeLists.txt

@@ -30,7 +30,12 @@ if(ENABLE_CURL_MANUAL AND BUILD_CURL_EXE)
 endif()
 
 if(BUILD_MISC_DOCS)
-  foreach(_man_misc IN ITEMS "curl-config" "mk-ca-bundle" "wcurl" "runtests" "testcurl")
+  set(_man_targets "curl-config" "mk-ca-bundle" "runtests" "testcurl")
+  if(BUILD_CURL_EXE)
+    list(APPEND _man_targets "wcurl")
+  endif()
+
+  foreach(_man_misc IN LISTS _man_targets)
     set(_man_target "${CMAKE_CURRENT_BINARY_DIR}/${_man_misc}.1")
     add_custom_command(OUTPUT "${_man_target}"
       WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}