Commit Graph

20 Commits

Author SHA1 Message Date
Alexander Neundorf 39383ef8cb Major optimization of C/C++ dependency scanning.
Now only the dependencies for the file where the dependencies actually may
have changed are rescanned, before that this was done for all source files
even if only one source file had changed.
This reduces e.g. on my machine the time for scanning the dependencies
of kdelibs/khtml/ when only one file (khtml_global.cpp) has changed from
around 7.5 seconds to 1.2 seconds.

The tests succeed, it does what I expected it to do on kdelibs, and Brad
also reviewed the patch, so I think it should be ok.

Alex
2009-09-23 14:02:05 -04:00
Alexander Neundorf 864e2670d6 Minor optimization in dependency checking.
When reading the depend.internal file, check only once for every depender
whether it exists, instead of repeatedly in a loop for each dependee. Within
that function it can only change of the depender is removed. This is taken
care of.
This reduces the number of access() calls in kdelibs/khtml from 180000 to
90000 (i.e. 50%), and reduces the time for that (without the actual
scanning) from 0.3 s to 0.21 s on my system.

Alex
2009-09-19 13:02:12 -04:00
Brad King 12935b1599 ENH: Light refactoring of implicit dependency scanning configuration implementation.
- Move lookup of config variables from cmLocalUnixMakefileGenerator3 to cmDepends hierarchy.
2008-05-08 10:09:14 -04:00
Brad King 68dad94b00 ENH: Implement Fortran module dependencies across targets and directories.
- See issue #5809
  - Keep information about all sources in the target until deps are written
  - Create a fortran.internal file after scanning that lists modules provided
  - Load fortran.internal files from linked targets to find modules
  - Search the include path for external modules
  - Create file-level deps on in-project module timestamps or external mods
2007-12-28 11:49:59 -05:00
Brad King 4d360f7ac5 ENH: Convert cmDepends object interface to scan an entire target at once. 2007-12-22 22:41:42 -05:00
Brad King de96fd1df9 ENH: Moved dependency integrity check from CheckBuildSystem over to a per-target UpdateDependencies step. This greatly reduces the startup time for make processes and allows individual targets to be built without a global dependency check. 2007-12-19 16:36:30 -05:00
Brad King ec2104cd31 BUG: Updated Makefile dependency scanning to provide a full local generator to the dependency scanner to do proper path conversions. This allows the rules written into the depend.make files to use the same relative path conversion as those written into the build.make files. Several previous changes added more and more information for use by the dependency scanner and it was converging to having the full local generator anyway. 2006-05-25 09:47:30 -04:00
Ken Martin d77fbb9640 STYLE: fix line length 2006-05-10 14:15:15 -04:00
Ken Martin 3d96e52261 STYLE: some m_ to this-> cleanup 2006-03-15 11:02:08 -05:00
Bill Hoffman 5c692ee247 ENH: correct include for memcpy 2006-01-23 12:31:08 -05:00
Andy Cedilnik 6a67b1bf71 BUG: Fix logic to return true when the file was already statted. Also, use nanosecond percision if available. Remove debug 2005-10-13 10:07:12 -04:00
Andy Cedilnik f18e7c7ff7 ENH: Improve performance of check build system by creating another file that is simpler to parse and therefore much faster overall 2005-10-12 13:52:29 -04:00
Ken Martin f85f919dbc ENH: reduce the number of files produced still needs a bit more cleanup 2005-07-27 09:49:37 -04:00
Ken Martin d7cbf3e1d6 BUG: a fix for constant recomputing of depends 2005-05-25 12:22:32 -04:00
Ken Martin c85069b290 ENH: some changes to the depends signature to be more flexible 2005-05-11 13:16:45 -04:00
Brad King e8911705d6 ENH: Added optional verbose output to build system dependency check. 2005-05-06 09:58:58 -04:00
Bill Hoffman 9e4506a2d0 ENH: do not collapse full path for cwd 2005-04-12 13:26:35 -04:00
Brad King 5dc555e26d BUG: Dependency scans and checks must always set the current working directory to the directory containing the Makefile. 2005-03-08 09:24:24 -05:00
Brad King 337ad802c6 ENH: Implemented support for include/complain regular expressions for dependency scanning. This now includes the possibility that scanning will return failure and the build will stop. 2005-02-07 16:11:01 -05:00
Brad King 195cdf172e ENH: Split dependency scanning and checking into separate cmDepends superclass with language-specific subclasses such as cmDependsC. 2005-01-18 17:09:05 -05:00