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It is not clear to all that this has to be specified as
-Accflags=-D... when used on the Configure command line.
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Commit 6bfe0388956736a32b874cc5e31cc6437260b227 prompted me to do some
more digging. The bug in glibc has apparently been fixed in 2.17.
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http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2013-09/msg00506.htmlP
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It was not consistent throughout.
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Also add doc about gdb's ptype, and make examples more clear.
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Shorten this long verbatim line by removing the pod markup (which would
be rendered literally), changing the indent to 4 (to match the ‘make
foo.i’ further down) and removing the trailing space
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The suggestions from that Craig Berry fellow were only half-baked.
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This allows compilers that do support real booleans (C++ or anything
with stdbool.h) to emulate those that don’t.
See ticket #120314.
This patch incorporates suggestions from Craig Berry.
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I don't feel that it's worthwhile having specific named targets for
building named binaries for use with gprof and gcov given that one has to
(re)Configure with the appropriate C compiler flags, hence all the object
files and the F<perl> that the build tree would build are just as enabled
(or contaminated) with profiling code as the specially named binary.
Update the documentation on using gprof and gcov to reflect that the binary
named F<perl> is now the binary that is profiled.
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Also s/linux/Linux/ in two places.
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It's not clear whether IBM still sell quantify or purecov. They still seem
to sell purify, but I'm not sure if anyone is using it these days to detect
bugs in perl.
This doesn't prevent anyone from using these tools if they have them, as
it's still possible to run the commands by "hand". But by removing probably
unused code and documentation, the signal to noise ratio improves.
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Remove the targets:
perl.pixie perl.pixie.atom perl.pixie.config perl.pixie.irix perl.third
perl.third.config
It's still possible to run the actions these targets "by hand", if desired.
This commit removes the convenience targets from the Makefile, reducing its
complexity. It also removes the related support scripts testall.atom and
thirdclean from Porting/
pixie is a performance analysis tool for Irix and Tru64
Third Degree is a memory checker tool for Tru64
Given that Tru64 went out of support at the end of 2012, and Irix goes out
of support at the end of 2013, it's very unlikely that anyone is still
actively profiling or debugging perl on either platform, and hence using
these targets. It's been several years since we've even had a regular bug
report from either platform.
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I don’t know when this changed, but I *can* build F<perl> with
PERL_DEBUG_READONLY_OPS, and I could before I rewrote it to use the
new slab allocator. So that particular note in perlhacktips may have
been wrong for quite some time. I assume it had to do with redefini-
tion sub warnings that try to set the line number of the current cop
(which is still a problem).
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-Afoo=val appends 'val' to the value of variable foo after the platform
hints are processed, but before the default value is computed by Configure.
At this time, 'foo' appears as non-empty and Configure skips the default
logic. This is the reason -shared must always be added to lddlflags.
I don't know why I didn't caught this while testing AddressSanitizer builds.
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[amended to fix a typo, and add an exception to the podcheck database]
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The existing perlhack is huge and takes a long time to get to key
information like "how to submit a patch". It also contains a massive
amount of (very useful) detail on the Perl interpreter, debugging,
portability issues, and so on.
Some parts of perlhack are just obsolete. For example, Larry really
isn't deeply involved on p5p any more.
Meanwhile, perlrepository _also_ contains a lot of useful information
on patching Perl, as well as a small git tutorial focused on working
with the Perl repository.
Taken together, the two documents overlap and conflict with each other.
This commit does the following:
== Reconcile conflicts and overlaps, remove obsolete information
I've separated out distinct pieces of information and organized them
into individual pod files. More on that below. I've also removed anything
that was obviously out of date.
== Make it easier for casual contributors to contribute.
The perlhack document now gets to "how to make a patch" very quickly. My
assumption is that most contributors to Perl are doing something small,
like fixing pod, adding a test, etc.
The documentation aimed at people doing more extensive hacking is still
there, but it's been moved so that it comes at the end of the document
or has been moved to another document.
I've made an effort to cross-reference the various documents so that
nothing gets lost.
== Get to the point
The perlhack document had a lot of discussion of general Perl culture.
I've trimmed a lot of this and moved some of it so it comes later.
== Per-file summary
=== perlrepository.pod
This is gone. Some of its content is now in perlhack. This includes
the bits on writing good commit messages, how (and where) to submit a
patch, etc.
The rest is now called perlgit, and is _only_ a git how-to.
=== perlhack.pod
This has been cut down quite a bit.
I changed the opening so it starts with a quick guide to submitting
small patches.
The document covers bug reporting, the p5p list, a quick how-to on
getting the source (including git, gitweb, and rsync), and a lot of
general information on patching perl and running tests.
Much of this material was already present, but I've done a fair amount
of editing for modernization and clarity.
Most of the information specific to C-level hacking has been moved to
other documents.
=== perlsource.pod
This is a guide to the Perl source tree. Most of the content was extracted
from perlhack. I've edited existing content and added details on some
parts of the tree that weren't covered.
=== perlinterp.pod
This is a tour of the Perl interpreter source and a walkthrough of
how it works that originally lived in perlhack. This has received very
little editing.
=== perlhacktut.pod
This is a walkthrough of creating a sample patch to the C core code that
originally lived in perlhack. This has received very little editing.
=== perlhacktips.pod
The perlhack document contained a lot of useful information on low-level
hacking details like debugging, compilation issues, portability, etc.
This has received very little editing.
I did remove some bits on ancient stuff related to Tru64 and IRIX.
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