Thu, 12 Oct 2006 11:09:17 +0000Bugfix
alpar [Thu, 12 Oct 2006 11:09:17 +0000] rev 2238
Bugfix

Thu, 12 Oct 2006 10:56:26 +0000Improve the configuration environment / repository layout:
alpar [Thu, 12 Oct 2006 10:56:26 +0000] rev 2237
Improve the configuration environment / repository layout:
- Update README
- svn-head -> svnhead version tag change (in favor of rpm build)
- rpmbuild-glpk: a script to build glpk rpm.

Thu, 12 Oct 2006 10:53:49 +0000EdgeLookUp and AllEdgeLookUp tests added.
alpar [Thu, 12 Oct 2006 10:53:49 +0000] rev 2236
EdgeLookUp and AllEdgeLookUp tests added.

Thu, 12 Oct 2006 10:53:25 +0000EdgeLookUp and AllEdgeLookUp added.
alpar [Thu, 12 Oct 2006 10:53:25 +0000] rev 2235
EdgeLookUp and AllEdgeLookUp added.

Thu, 12 Oct 2006 10:51:51 +0000Minor change in 'make rpm' behaviour.
alpar [Thu, 12 Oct 2006 10:51:51 +0000] rev 2234
Minor change in 'make rpm' behaviour.

Tue, 10 Oct 2006 13:50:47 +0000docfix
alpar [Tue, 10 Oct 2006 13:50:47 +0000] rev 2233
docfix

Thu, 05 Oct 2006 10:18:58 +0000Fix a bug and two warnings
alpar [Thu, 05 Oct 2006 10:18:58 +0000] rev 2232
Fix a bug and two warnings

Tue, 03 Oct 2006 11:46:39 +0000Some rearrangement of concepts and extenders
deba [Tue, 03 Oct 2006 11:46:39 +0000] rev 2231
Some rearrangement of concepts and extenders
BpUGraph concepts and concept check test

Tue, 03 Oct 2006 11:24:41 +0000Some doc fix
deba [Tue, 03 Oct 2006 11:24:41 +0000] rev 2230
Some doc fix

Mon, 02 Oct 2006 16:11:00 +0000Mersenne Twister random number generator
deba [Mon, 02 Oct 2006 16:11:00 +0000] rev 2229
Mersenne Twister random number generator

The code is based on the official MT19937 implementation
It is fully rewritten:

http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html

todo: fixing copyright information

Mon, 02 Oct 2006 14:41:53 +0000Improved documentation.
athos [Mon, 02 Oct 2006 14:41:53 +0000] rev 2228
Improved documentation.

Mon, 02 Oct 2006 12:09:32 +0000include just the existing solvers
deba [Mon, 02 Oct 2006 12:09:32 +0000] rev 2227
include just the existing solvers

Mon, 02 Oct 2006 11:18:30 +0000MIP interface tested (and corrected) for cplex 9.0
athos [Mon, 02 Oct 2006 11:18:30 +0000] rev 2226
MIP interface tested (and corrected) for cplex 9.0

Fri, 29 Sep 2006 11:36:30 +0000Doc fix
deba [Fri, 29 Sep 2006 11:36:30 +0000] rev 2225
Doc fix

Fri, 29 Sep 2006 11:26:29 +0000Moving the file into correct group
deba [Fri, 29 Sep 2006 11:26:29 +0000] rev 2224
Moving the file into correct group

Fri, 29 Sep 2006 11:25:27 +0000Exporting interface to the Graph class
deba [Fri, 29 Sep 2006 11:25:27 +0000] rev 2223
Exporting interface to the Graph class
Some documentation improvements

Fri, 29 Sep 2006 11:23:54 +0000findEdge extension also for the BpUGraphs
deba [Fri, 29 Sep 2006 11:23:54 +0000] rev 2222
findEdge extension also for the BpUGraphs
proper handling of loop edges in the UGraph::findUEdge

Tue, 26 Sep 2006 12:20:22 +0000Minor changes.
athos [Tue, 26 Sep 2006 12:20:22 +0000] rev 2221
Minor changes.

Mon, 25 Sep 2006 08:51:08 +0000Too many files added: sorry.
athos [Mon, 25 Sep 2006 08:51:08 +0000] rev 2220
Too many files added: sorry.

Mon, 25 Sep 2006 08:50:36 +0000Missing cplex files: sorry.
athos [Mon, 25 Sep 2006 08:50:36 +0000] rev 2219
Missing cplex files: sorry.

Thu, 21 Sep 2006 14:46:28 +0000Interface to the cplex MIP solver: it is little, a bit sour but it is ours.
athos [Thu, 21 Sep 2006 14:46:28 +0000] rev 2218
Interface to the cplex MIP solver: it is little, a bit sour but it is ours.

Thu, 14 Sep 2006 19:58:29 +0000Doc fix
deba [Thu, 14 Sep 2006 19:58:29 +0000] rev 2217
Doc fix

Thu, 14 Sep 2006 19:11:24 +0000The recent progresses on the tutorial due to Mark.
alpar [Thu, 14 Sep 2006 19:11:24 +0000] rev 2216
The recent progresses on the tutorial due to Mark.

Thu, 14 Sep 2006 19:02:52 +0000Fix another one external build problem.
alpar [Thu, 14 Sep 2006 19:02:52 +0000] rev 2215
Fix another one external build problem.

Thu, 14 Sep 2006 18:39:07 +0000Doc improvements
alpar [Thu, 14 Sep 2006 18:39:07 +0000] rev 2214
Doc improvements

Fri, 08 Sep 2006 15:51:32 +0000Some corrections.
athos [Fri, 08 Sep 2006 15:51:32 +0000] rev 2213
Some corrections.

Fri, 08 Sep 2006 08:55:07 +0000Some small improvments
deba [Fri, 08 Sep 2006 08:55:07 +0000] rev 2212
Some small improvments

size() and subscription operators
compatibility with higher dimensions

Thu, 07 Sep 2006 14:16:47 +0000Hao-Orlin algorithm
deba [Thu, 07 Sep 2006 14:16:47 +0000] rev 2211
Hao-Orlin algorithm

It is based on Attila's work
It is tested on all dimacs files in data directory

It may need more execution control
- possible interruption after each findNewSink

Thu, 07 Sep 2006 14:04:31 +0000Add missing header sentry
deba [Thu, 07 Sep 2006 14:04:31 +0000] rev 2210
Add missing header sentry

Thu, 07 Sep 2006 13:35:48 +0000Resolve 'unused variable' warning
alpar [Thu, 07 Sep 2006 13:35:48 +0000] rev 2209
Resolve 'unused variable' warning

Thu, 07 Sep 2006 13:34:14 +0000Revert an unintentional commit in r2933
alpar [Thu, 07 Sep 2006 13:34:14 +0000] rev 2208
Revert an unintentional commit in r2933

Thu, 07 Sep 2006 13:27:16 +0000xy -> dim2::Point
alpar [Thu, 07 Sep 2006 13:27:16 +0000] rev 2207
xy -> dim2::Point

Wed, 06 Sep 2006 11:39:22 +0000I forgot to remove the benchmarking part of code
deba [Wed, 06 Sep 2006 11:39:22 +0000] rev 2206
I forgot to remove the benchmarking part of code

Wed, 06 Sep 2006 11:17:12 +0000UnionFind
deba [Wed, 06 Sep 2006 11:17:12 +0000] rev 2205
UnionFind
Changing the representation of the union-find
it has the same running time but it takes just 2/3 space
! does not auto insert items /performance/

UnionFindEnum
Changing the interface - more convenient to UnionFind
Does not based on the stl data structures /it could be disadvantage/
=> does not use singular iterator assignment /not stl conform, but always work/
Just new iterator interface

MaxMatching + UnionFindTest
Using new iterator interface instead of the old

Wed, 06 Sep 2006 10:28:13 +0000Some doc fix
deba [Wed, 06 Sep 2006 10:28:13 +0000] rev 2204
Some doc fix

Wed, 06 Sep 2006 10:20:55 +0000Signaling alterations in BpUGraphs
deba [Wed, 06 Sep 2006 10:20:55 +0000] rev 2203
Signaling alterations in BpUGraphs

Wed, 06 Sep 2006 10:19:57 +0000New map type based on array map for debugging purpose
deba [Wed, 06 Sep 2006 10:19:57 +0000] rev 2202
New map type based on array map for debugging purpose

It checks multiple allocation and deallocation of map values and
some consistency.

todo:
clarification of debugging concepts
assertions - exceptions - debug
revision of attic/debug.h

motto:
testing is at least so important as coding

Wed, 06 Sep 2006 10:10:48 +0000Bug fix in DescriptorMap
deba [Wed, 06 Sep 2006 10:10:48 +0000] rev 2201
Bug fix in DescriptorMap
Avoiding the possibility of the memory leak

Wed, 06 Sep 2006 10:01:15 +0000An easy avoiding of a bug
deba [Wed, 06 Sep 2006 10:01:15 +0000] rev 2200
An easy avoiding of a bug

The functional interfaces are removed.
Better solution could be a reference counted core of the io interfaces

Now it is huge work so just write that:

GraphReader<ListGraph>(std::cin, graph).

Instead of:

graphReader(std::cin, graph).

Wed, 06 Sep 2006 09:55:37 +0000Bug fix
deba [Wed, 06 Sep 2006 09:55:37 +0000] rev 2199
Bug fix

Wed, 06 Sep 2006 09:54:46 +0000Using abort() instead of exit(1)
deba [Wed, 06 Sep 2006 09:54:46 +0000] rev 2198
Using abort() instead of exit(1)

If a program is aborted then the call stack can be analyzed with debugger.
The exit(1) does not provides that.

Wed, 06 Sep 2006 08:36:52 +0000Disable mip_test when no LP solver is available.
alpar [Wed, 06 Sep 2006 08:36:52 +0000] rev 2197
Disable mip_test when no LP solver is available.

Mon, 04 Sep 2006 20:07:37 +0000Add missing Tutorial dox files
alpar [Mon, 04 Sep 2006 20:07:37 +0000] rev 2196
Add missing Tutorial dox files

Mon, 04 Sep 2006 19:48:09 +0000Tutorial improvements by Mark (mqrelly)
alpar [Mon, 04 Sep 2006 19:48:09 +0000] rev 2195
Tutorial improvements by Mark (mqrelly)

Mon, 04 Sep 2006 19:12:44 +0000'make doc' is now working also in case of external build.
alpar [Mon, 04 Sep 2006 19:12:44 +0000] rev 2194
'make doc' is now working also in case of external build.

Mon, 04 Sep 2006 12:27:03 +0000Bug fix in SmartEdgeSet
deba [Mon, 04 Sep 2006 12:27:03 +0000] rev 2193
Bug fix in SmartEdgeSet

+ validity check function

Mon, 04 Sep 2006 12:15:20 +0000Bug fix
deba [Mon, 04 Sep 2006 12:15:20 +0000] rev 2192
Bug fix
rethrow of exception missing

Mon, 04 Sep 2006 11:09:59 +0000Proper exception handling in the SmartEdgeSet
deba [Mon, 04 Sep 2006 11:09:59 +0000] rev 2191
Proper exception handling in the SmartEdgeSet

Mon, 04 Sep 2006 11:09:13 +0000Snapshot for SmartUGraph an SmartBpUGraph
deba [Mon, 04 Sep 2006 11:09:13 +0000] rev 2190
Snapshot for SmartUGraph an SmartBpUGraph

Mon, 04 Sep 2006 11:08:32 +0000Bug fix in ListBpUGraph
deba [Mon, 04 Sep 2006 11:08:32 +0000] rev 2189
Bug fix in ListBpUGraph

Snapshot improvments

Mon, 04 Sep 2006 11:05:21 +0000Improvment in exception handling
deba [Mon, 04 Sep 2006 11:05:21 +0000] rev 2188
Improvment in exception handling
The erase and clear handlers have to be exception safe.
These can throw only one exception which detach the observer
from the notifier

Mon, 04 Sep 2006 11:02:31 +0000Bug fix in UndirGraphAdaptor
deba [Mon, 04 Sep 2006 11:02:31 +0000] rev 2187
Bug fix in UndirGraphAdaptor

Mon, 04 Sep 2006 11:01:56 +0000Bug fix in countANodes/countBNodes
deba [Mon, 04 Sep 2006 11:01:56 +0000] rev 2186
Bug fix in countANodes/countBNodes

Wed, 30 Aug 2006 16:08:03 +0000Fixed the mip error (mipstatus was incorrect).
athos [Wed, 30 Aug 2006 16:08:03 +0000] rev 2185
Fixed the mip error (mipstatus was incorrect).

Mon, 28 Aug 2006 16:11:02 +0000Doc improvementst & todos
alpar [Mon, 28 Aug 2006 16:11:02 +0000] rev 2184
Doc improvementst & todos

Mon, 28 Aug 2006 16:10:12 +0000Update header list
alpar [Mon, 28 Aug 2006 16:10:12 +0000] rev 2183
Update header list

Mon, 28 Aug 2006 15:43:17 +0000bezier.h is no longer in the repository.
ladanyi [Mon, 28 Aug 2006 15:43:17 +0000] rev 2182
bezier.h is no longer in the repository.

Mon, 14 Aug 2006 16:14:10 +0000Omit warnings
deba [Mon, 14 Aug 2006 16:14:10 +0000] rev 2181
Omit warnings

Mon, 14 Aug 2006 16:08:28 +0000Omit warning
deba [Mon, 14 Aug 2006 16:08:28 +0000] rev 2180
Omit warning
Using check instead of the LEMON_ASSERT
Using fixed graph

Mon, 14 Aug 2006 15:18:09 +0000Remove superfluous include headers
alpar [Mon, 14 Aug 2006 15:18:09 +0000] rev 2179
Remove superfluous include headers

Mon, 14 Aug 2006 15:15:57 +0000- bezier.h went to lemon/bits/
alpar [Mon, 14 Aug 2006 15:15:57 +0000] rev 2178
- bezier.h went to lemon/bits/
- new graphToEps() option: absolute/relative node size/link width scaling.

Fri, 11 Aug 2006 14:55:33 +0000BiVariant moved to lemon/bits/variant.h
deba [Fri, 11 Aug 2006 14:55:33 +0000] rev 2177
BiVariant moved to lemon/bits/variant.h

Fri, 11 Aug 2006 14:55:02 +0000Doc fix
deba [Fri, 11 Aug 2006 14:55:02 +0000] rev 2176
Doc fix

Thu, 10 Aug 2006 13:54:01 +0000Doc improvements
alpar [Thu, 10 Aug 2006 13:54:01 +0000] rev 2175
Doc improvements

Thu, 10 Aug 2006 13:52:56 +0000Some color constants added (BLACK, WHITE, RED etc)
alpar [Thu, 10 Aug 2006 13:52:56 +0000] rev 2174
Some color constants added (BLACK, WHITE, RED etc)

Thu, 10 Aug 2006 12:26:29 +0000Resolve unused variable warning.
alpar [Thu, 10 Aug 2006 12:26:29 +0000] rev 2173
Resolve unused variable warning.

Thu, 10 Aug 2006 10:18:04 +0000- Change ColorSet to Palette
alpar [Thu, 10 Aug 2006 10:18:04 +0000] rev 2172
- Change ColorSet to Palette
- Minor change in graph_orientation demo.

Thu, 10 Aug 2006 10:11:07 +0000This script creates/updates the copyright header of a source file
alpar [Thu, 10 Aug 2006 10:11:07 +0000] rev 2171
This script creates/updates the copyright header of a source file

Wed, 09 Aug 2006 12:51:21 +0000Do not list the header itself.
alpar [Wed, 09 Aug 2006 12:51:21 +0000] rev 2170
Do not list the header itself.

Wed, 09 Aug 2006 12:47:31 +0000This script lists all the header files included directly or indirectly by a certain header file.
alpar [Wed, 09 Aug 2006 12:47:31 +0000] rev 2169
This script lists all the header files included directly or indirectly by a certain header file.

Wed, 02 Aug 2006 20:15:59 +0000CPLEX 9.x support.
ladanyi [Wed, 02 Aug 2006 20:15:59 +0000] rev 2168
CPLEX 9.x support.

Wed, 02 Aug 2006 20:15:22 +0000Fixed the mailinglist link and removed the gui section.
ladanyi [Wed, 02 Aug 2006 20:15:22 +0000] rev 2167
Fixed the mailinglist link and removed the gui section.

Tue, 01 Aug 2006 10:26:15 +0000More "doxygenish" syntax.
ladanyi [Tue, 01 Aug 2006 10:26:15 +0000] rev 2166
More "doxygenish" syntax.

Thu, 27 Jul 2006 11:49:15 +0000Maybe useful, feel free to remove if not.
ladanyi [Thu, 27 Jul 2006 11:49:15 +0000] rev 2165
Maybe useful, feel free to remove if not.

Mon, 24 Jul 2006 16:15:48 +0000long long just for gnu compilers
deba [Mon, 24 Jul 2006 16:15:48 +0000] rev 2164
long long just for gnu compilers

Mon, 24 Jul 2006 16:08:34 +0000Improving UGraph and BpUGraph concept classes
deba [Mon, 24 Jul 2006 16:08:34 +0000] rev 2163
Improving UGraph and BpUGraph concept classes

Mon, 24 Jul 2006 09:51:28 +0000make public what() in NodeSetError
deba [Mon, 24 Jul 2006 09:51:28 +0000] rev 2162
make public what() in NodeSetError

Mon, 24 Jul 2006 09:50:40 +0000Omit warning
deba [Mon, 24 Jul 2006 09:50:40 +0000] rev 2161
Omit warning

Mon, 24 Jul 2006 09:49:50 +0000Change source and target for the bipartite list graph
deba [Mon, 24 Jul 2006 09:49:50 +0000] rev 2160
Change source and target for the bipartite list graph
Some documentation corrections

Mon, 24 Jul 2006 08:11:00 +0000Minor doc improvement
alpar [Mon, 24 Jul 2006 08:11:00 +0000] rev 2159
Minor doc improvement

Thu, 20 Jul 2006 14:12:01 +0000Minor doc improvement
alpar [Thu, 20 Jul 2006 14:12:01 +0000] rev 2158
Minor doc improvement

Thu, 20 Jul 2006 06:20:27 +0000- Doc improvements
alpar [Thu, 20 Jul 2006 06:20:27 +0000] rev 2157
- Doc improvements
- rot180() added to xy.h

Wed, 19 Jul 2006 15:13:24 +0000spellcheck
alpar [Wed, 19 Jul 2006 15:13:24 +0000] rev 2156
spellcheck

Tue, 18 Jul 2006 17:00:24 +0000Minor doc changes.
alpar [Tue, 18 Jul 2006 17:00:24 +0000] rev 2155
Minor doc changes.

Tue, 18 Jul 2006 16:59:34 +0000Tolerance<unsigned int> and Tolerance<unsigned long long int> added.
alpar [Tue, 18 Jul 2006 16:59:34 +0000] rev 2154
Tolerance<unsigned int> and Tolerance<unsigned long long int> added.

Tue, 18 Jul 2006 15:57:55 +0000Better 'Naming Convention' conformance.
alpar [Tue, 18 Jul 2006 15:57:55 +0000] rev 2153
Better 'Naming Convention' conformance.

Tue, 18 Jul 2006 15:14:56 +0000Bugfix
alpar [Tue, 18 Jul 2006 15:14:56 +0000] rev 2152
Bugfix

Tue, 18 Jul 2006 13:29:59 +0000exceptionName() has been thrown away
alpar [Tue, 18 Jul 2006 13:29:59 +0000] rev 2151
exceptionName() has been thrown away

Tue, 18 Jul 2006 12:10:52 +0000Disable assertions in default behaviour
deba [Tue, 18 Jul 2006 12:10:52 +0000] rev 2150
Disable assertions in default behaviour
Documentation changed

Tue, 18 Jul 2006 11:11:54 +0000Some tests added to the test file mip_test.cc. One problem is the verbosity of the mip solver in glpk which I couldn't find how to kill.
athos [Tue, 18 Jul 2006 11:11:54 +0000] rev 2149
Some tests added to the test file mip_test.cc. One problem is the verbosity of the mip solver in glpk which I couldn't find how to kill.

Mon, 17 Jul 2006 11:56:17 +0000Modifications to the interface: colType() functions, though I left the old integer() functions, too.
athos [Mon, 17 Jul 2006 11:56:17 +0000] rev 2148
Modifications to the interface: colType() functions, though I left the old integer() functions, too.

Mon, 17 Jul 2006 09:31:41 +0000mip_test file went to mip_demo.
athos [Mon, 17 Jul 2006 09:31:41 +0000] rev 2147
mip_test file went to mip_demo.

Mon, 17 Jul 2006 09:16:00 +0000Still not final.
athos [Mon, 17 Jul 2006 09:16:00 +0000] rev 2146
Still not final.

Mon, 17 Jul 2006 09:10:19 +0000Sorry, mistake
athos [Mon, 17 Jul 2006 09:10:19 +0000] rev 2145
Sorry, mistake

Mon, 17 Jul 2006 09:00:21 +0000MIP support added (by Jano, the Great).
athos [Mon, 17 Jul 2006 09:00:21 +0000] rev 2144
MIP support added (by Jano, the Great).

Mon, 17 Jul 2006 07:30:56 +0000Even better...
alpar [Mon, 17 Jul 2006 07:30:56 +0000] rev 2143
Even better...

Mon, 17 Jul 2006 07:00:39 +0000Some documentation got changed.
athos [Mon, 17 Jul 2006 07:00:39 +0000] rev 2142
Some documentation got changed.

Fri, 14 Jul 2006 13:48:14 +0000reference to modules added
alpar [Fri, 14 Jul 2006 13:48:14 +0000] rev 2141
reference to modules added

Fri, 14 Jul 2006 13:11:18 +0000Minor comment added.
alpar [Fri, 14 Jul 2006 13:11:18 +0000] rev 2140
Minor comment added.

Fri, 14 Jul 2006 10:51:14 +0000Some updates and restructuring
alpar [Fri, 14 Jul 2006 10:51:14 +0000] rev 2139
Some updates and restructuring

Fri, 14 Jul 2006 10:50:05 +0000glemon is in a separate repository.
alpar [Fri, 14 Jul 2006 10:50:05 +0000] rev 2138
glemon is in a separate repository.

Fri, 14 Jul 2006 10:25:26 +0000Using fixed bipartite graph
deba [Fri, 14 Jul 2006 10:25:26 +0000] rev 2137
Using fixed bipartite graph

Fri, 14 Jul 2006 09:37:48 +0000Bug fix in MinCostMaxBipartiteMatching
deba [Fri, 14 Jul 2006 09:37:48 +0000] rev 2136
Bug fix in MinCostMaxBipartiteMatching
The augmenting phase have not changed the
unreached nodes' potential which caused invalid
dual solution in some cases

Wed, 12 Jul 2006 11:40:52 +0000Must have been changed because of the private copy constructor.
alpar [Wed, 12 Jul 2006 11:40:52 +0000] rev 2135
Must have been changed because of the private copy constructor.

Wed, 12 Jul 2006 11:14:12 +0000... and fix another one.
alpar [Wed, 12 Jul 2006 11:14:12 +0000] rev 2134
... and fix another one.

Wed, 12 Jul 2006 11:07:48 +0000... and fix a stupid bug.
alpar [Wed, 12 Jul 2006 11:07:48 +0000] rev 2133
... and fix a stupid bug.

Wed, 12 Jul 2006 11:05:00 +0000(Hopefully) finish privatizing the copy constr. and operator= in
alpar [Wed, 12 Jul 2006 11:05:00 +0000] rev 2132
(Hopefully) finish privatizing the copy constr. and operator= in
the graph concept, ListGraph and SmartGraph.

Wed, 12 Jul 2006 10:49:17 +0000New, less general installation instructions.
ladanyi [Wed, 12 Jul 2006 10:49:17 +0000] rev 2131
New, less general installation instructions.

Wed, 12 Jul 2006 10:38:11 +0000Resolving: Bug #51
deba [Wed, 12 Jul 2006 10:38:11 +0000] rev 2130
Resolving: Bug #51

Wed, 12 Jul 2006 10:34:07 +0000Resolving: Bug #52
deba [Wed, 12 Jul 2006 10:34:07 +0000] rev 2129
Resolving: Bug #52

Tue, 11 Jul 2006 16:09:49 +0000- Disable the copy constructor and operator= of {List|Smart}[U]Graph.
alpar [Tue, 11 Jul 2006 16:09:49 +0000] rev 2128
- Disable the copy constructor and operator= of {List|Smart}[U]Graph.
- Improve graph doc
- Also put private members into the doc (if they are documented)

Tue, 11 Jul 2006 15:50:19 +0000Do not install the documentation if configure was called with --disable-doc.
ladanyi [Tue, 11 Jul 2006 15:50:19 +0000] rev 2127
Do not install the documentation if configure was called with --disable-doc.