12 Apr
2012
12 Apr
'12
9:07 p.m.
Tim, c/c++ folks,
I have worked gcc47 patches in most of the major packages to the point where I
have hit a common failure that I cannot solve. The common problem involves
error: redeclaration of (foo). Usually involving some iterator. The list of
packages that have a similar build failure are:
tde-kipi-plugins - error: redeclaration of 'TQListViewItemIterator it'
tde-tdepim - error: redeclaration of 'TQMap<TQGuardedPtr<KMFolder>,
int>::Iterator it'
tde-k3b - error: redeclaration of 'K3bAudioEditorWidget::Range* r'
rosegarden - error:
redeclaration of 'std::multiset<Rosegarden::Event*
I don't know what the various declarations are supposed to look like to begin
with so I sure can't recognize which one, and in what scope, the declarations
need to be fixed. Thanks for you help.
--
David C. Rankin, J.D.,P.E.
12 Apr
12 Apr
10:33 p.m.
New subject: [trinity-devel] coders - need help with gcc47 - redeclaration of (x) issue in several packages
On 04/12/2012 04:07 PM, David C. Rankin wrote:
Tim, c/c++ folks,
I have worked gcc47 patches in most of the major packages to the point where I
have hit a common failure that I cannot solve. The common problem involves
error: redeclaration of (foo). Usually involving some iterator. The list of
packages that have a similar build failure are:
tde-kipi-plugins - error: redeclaration of 'TQListViewItemIterator it'
tde-tdepim - error: redeclaration of 'TQMap<TQGuardedPtr<KMFolder>,
int>::Iterator it'
tde-k3b - error: redeclaration of 'K3bAudioEditorWidget::Range* r'
rosegarden - error:
redeclaration of 'std::multiset<Rosegarden::Event*
I don't know what the various declarations are supposed to look like to begin
with so I sure can't recognize which one, and in what scope, the declarations
need to be fixed. Thanks for you help.
Here is the code-block from rosegarden that is failing in
src/document/RosegardenGUIDoc.cpp (line 2147 and 2152 designated with '*'):
* for (RecordingSegmentMap::iterator i = m_recordMIDISegments.begin();
i != m_recordMIDISegments.end();
++i) {
Segment *s = i->second;
* Segment::iterator i = s->begin();
if (i == s->end() || !(*i)->isa(Clef::EventType)) continue;
if ((*i)->getAbsoluteTime() < meaningfulBarStart) {
Event *e = new Event(**i, meaningfulBarStart);
s->erase(i);
s->insert(e);
}
I see the designations:
(1) RecordingSegmentMap::iterator i = m_recordMIDISegments.begin()
(2) Segment::iterator i = s->begin();
How is the compiler seeing ' RecordingSegmentMap::' and 'Segment::' as
the
same thing?
More importantly, how to fix it?
This is all withing the scope of:
2087 void
2088 RosegardenGUIDoc::stopRecordingMidi()
2089 {
...
2229 }
Grepping it looks like it is declared a number of times:
archangel:/dat_e/tmp/rosegarden/src/document> grep -En 'Segment[A-Za-z]*::'
RosegardenGUIDoc.cpp
<snip>
2099: std::vector<RecordingSegmentMap::iterator> toErase;
2101: for (RecordingSegmentMap::iterator i = m_recordMIDISegments.begin();
2109: for (Segment::iterator i = s->begin(); i != s->end(); ++i) {
2147: for (RecordingSegmentMap::iterator i = m_recordMIDISegments.begin();
2152: Segment::iterator i = s->begin();
2592: (Segment::Audio);
2710: for (RecordingSegmentMap::iterator ri = m_recordAudioSegments.begin();
What to do?
--
David C. Rankin, J.D.,P.E.
10:57 p.m.
New subject: [trinity-devel] coders - need help with gcc47 - redeclaration of (x) issue in several packages
On 04/12/2012 05:33 PM, David C. Rankin wrote:
<snip>
archangel:/dat_e/tmp/rosegarden/src/document> grep -En 'Segment[A-Za-z]*::'
RosegardenGUIDoc.cpp
<snip>
2099: std::vector<RecordingSegmentMap::iterator> toErase;
2101: for (RecordingSegmentMap::iterator i = m_recordMIDISegments.begin();
2109: for (Segment::iterator i = s->begin(); i != s->end(); ++i) {
2147: for (RecordingSegmentMap::iterator i = m_recordMIDISegments.begin();
2152: Segment::iterator i = s->begin();
2592: (Segment::Audio);
2710: for (RecordingSegmentMap::iterator ri = m_recordAudioSegments.begin();
What to do?
Hmm.. This looks promising for rosegarden. At least a prior patch:
http://sourceforge.net/tracker/index.php?func=detail&aid=3475088&gr…
--
David C. Rankin, J.D.,P.E.
13 Apr
13 Apr
12:48 a.m.
New subject: [trinity-devel] coders - need help with gcc47 - redeclaration of (x) issue in several packages
On 04/12/2012 05:57 PM, David C. Rankin wrote:
Hmm.. This looks promising for rosegarden. At least a
prior patch:
http://sourceforge.net/tracker/index.php?func=detail&aid=3475088&gr…
Nevermind - our rosegarden is 6 years older than the patch. Back to patching...
--
David C. Rankin, J.D.,P.E.
9:21 p.m.
New subject: [trinity-devel] coders - need help with gcc47 - redeclaration of (x) issue in several packages
On 12 Apr 2012, David C. Rankin told this:
Here is the code-block from rosegarden that is failing
in
src/document/RosegardenGUIDoc.cpp (line 2147 and 2152 designated with '*'):
* for (RecordingSegmentMap::iterator i = m_recordMIDISegments.begin();
i != m_recordMIDISegments.end();
++i) {
Segment *s = i->second;
* Segment::iterator i = s->begin();
if (i == s->end() || !(*i)->isa(Clef::EventType)) continue;
if ((*i)->getAbsoluteTime() < meaningfulBarStart) {
Event *e = new Event(**i, meaningfulBarStart);
s->erase(i);
s->insert(e);
}
I see the designations:
(1) RecordingSegmentMap::iterator i = m_recordMIDISegments.begin()
(2) Segment::iterator i = s->begin();
How is the compiler seeing ' RecordingSegmentMap::' and 'Segment::' as
the
same thing?
It's not. The scope of variables declared in for loops was wrong in GCC
4.6 and below. (This is 'Detection of redeclared variables names in
nested scopes' in the GCC 4.7 porting guide.)
The inside of the for loop's brackets and statement body are the same
scope, not two scopes so redeclarating 'i' in both those places is an
error.
The solution is to rename one of those variables. (It is generally
easier to rename the outermost one, and its uses within the for loop's
brackets and before the declaration of the *other* i.)
--
NULL && (void)
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