| Bug #47929 | cmake generates a file every time cmake is called, causing a wait for re-link | ||
|---|---|---|---|
| Submitted: | 9 Oct 8:22 | ||
| Reporter: | jack andrews | ||
| Status: | In progress | ||
| Category: | Server: Cluster | Severity: | S3 (Non-critical) |
| Version: | mysql-5.1-telco-7.0 | OS: | Microsoft Windows |
| Assigned to: | jack andrews | Target Version: | |
| Triage: | Triaged: D4 (Minor) / R6 (Needs Assessment) / E6 (Needs Assessment) | ||
[10 Oct 2:17]
Vladislav Vaintroub
The problem here is file(write)
if you generate the file with
ADD_CUSTOM_COMMAND(
OUTPUT dummy.c
COMMAND ${CMAKE_COMMAND} ARGS -E touch dummy.c)
this rebuild/relink will not happen
[12 Oct 5:56]
jack andrews
> ADD_CUSTOM_COMMAND(
> OUTPUT dummy.c
> COMMAND ${CMAKE_COMMAND} ARGS -E touch dummy.c)
as i read it, this will touch dummy.c every run of cmake.
this leaves me in the same situation.
but i think for ndb, we will want to release the ndbclient
convenience library, so longer term, we need to fix this.
http://www.cmake.org/pipermail/cmake/2009-January/026745.html
[16 Oct 13:23]
Magnus Blaudd
Whey not do it like sql/CMakeLists.txt and only generate the file if it does not already exist. IF (NOT EXISTS cmake_dummy.cc) FILE (WRITE cmake_dummy.cc "") ENDIF (NOT EXISTS cmake_dummy.cc) ADD_EXECUTABLE(mysqld cmake_dummy.cc)
[19 Oct 2:42]
jack andrews
actually, this doesn't even work in (ndb 5.1 version of) mysqld. if you build the entire solution (F7), then hit F7 again, it will re-link mysqld. i know it doesn't make sense, but there you are.
Description: this code in storage/ndb/src/CMakeLists.txt causes a re-link of everything dependent on ndbclient after running cmake. FILE(WRITE ${CMAKE_CURRENT_SOURCE_DIR}/dummy.cpp "") ADD_LIBRARY(ndbclient STATIC dummy.cpp) TARGET_LINK_LIBRARIES(ndbclient ndbapi ndbtransport ndbtrace ndbsignaldata ndbmgmapi ndbmgmsrv ndblogger ndbportlib ndbgeneral) How to repeat: . Suggested fix: turn ndbclient into ${ndb_client_libs} and use that in place of ndbclient