3. [20]Platform-Specific Issues
1. [21]Can libstdc++-v3 be used with <my favorite compiler>?
2. [22][removed]
- 3. [23]Building under DEC OSF kills the assembler
+ 3. [23][removed]
4. [24]I can't use 'long long' on Solaris
4. [25]Known Bugs and Non-Bugs
1. [26]What works already?
to preserve numbering (and hence links/bookmarks).
_________________________________________________________________
-3.3 Building DEC OSF kills the assembler
+3.3 [removed]
- The atomicity.h header for the Alpha processor currently uses
- pseudo-operators which the DEC assembler doesn't understand (in
- particular, .subsection and .previous). The simple solution is to
- install GNU as and arrange for the GCC build to use it (or merge the
- sources and build it during the bootstrap).
-
- Anyone who [66]knows the DEC assembler well enough to provide the
- equivalent of these two pseudos would win praise and accolades from
- many.
+ This question has become moot and has been removed. The stub is here
+ to preserve numbering (and hence links/bookmarks).
_________________________________________________________________
3.4 I can't use 'long long' on Solaris
include/Makefile, resulting in files like gthr.h and gthr-single.h not
being found.
- Please read [67]the configuration instructions for GCC, specifically
+ Please read [66]the configuration instructions for GCC, specifically
the part about configuring in a separate build directory, and how
strongly recommended it is. Building in the source directory is
fragile, is rarely tested, and tends to break, as in this case. This
some problems that users may encounter when building or using
libstdc++. If you are experiencing one of these problems, you can find
more information on the libstdc++ and the GCC mailing lists.
- * As of 3.0.95, those bugs have all been fixed. We look forward to
- new ones, well, not exactly... Existing bugs are listed in the
- BUGS file, and the GCC GNATS database.
+
+ Before reporting a bug, examine the [67]bugs database with the
+ category set to "libstdc++". The BUGS file in the source tree also
+ tracks known serious problems.
+ * Debugging is problematic, due to bugs in line-number generation
+ (mostly fixed in the compiler) and gdb lagging behind the compiler
+ (lack of personnel). We recommend configuring the compiler using
+ --with-dwarf2 if the DWARF2 debugging format is not already the
+ default on your platform. Also, [68]changing your GDB settings can
+ have a profound effect on your C++ debugging experiences. :-)
_________________________________________________________________
4.3 Bugs in the C++ language/lib specification
- Yes, unfortunately, there are some. In a [68]message to the list,
+ Yes, unfortunately, there are some. In a [69]message to the list,
Nathan Myers announced that he has started a list of problems in the
ISO C++ Standard itself, especially with regard to the chapters that
- concern the library. The list itself is [69]posted on his website.
+ concern the library. The list itself is [70]posted on his website.
Developers who are having problems interpreting the Standard may wish
to consult his notes.
For those people who are not part of the ISO Library Group (i.e.,
nearly all of us needing to read this page in the first place :-), a
- public list of the library defects is occasionally published [70]here.
- Some of these have resulted in [71]code changes.
+ public list of the library defects is occasionally published [71]here.
+ Some of these have resulted in [72]code changes.
_________________________________________________________________
4.4 Things in libstdc++ that look like bugs
the library headers emitted when -Weffc++ is used. Making libstdc++
"-Weffc++-clean" is not a goal of the project, for a few reasons.
Mainly, that option tries to enforce object-oriented programming,
- while the Standard Library isn't necessarily trying to be OO. There
- are multiple solutions under discussion.
+ while the Standard Library isn't necessarily trying to be OO.
reopening a stream fails Did I just say that -Weffc++ was our biggest
false-bug report? I lied. (It used to be.) Today it seems to be
state on the previous file. The reason is that the state flags are not
cleared on a successful call to open(). The standard unfortunately did
not specify behavior in this case, and to everybody's great sorrow,
- the [72]proposed LWG resolution (see DR #22) is to leave the flags
+ the [73]proposed LWG resolution (see DR #22) is to leave the flags
unchanged. You must insert a call to fs.clear() between the calls to
close() and open(), and then everything will work like we all expect
it to work.
same namespace as other comparison functions (e.g., 'using' them and
the <iterator> header), then you will suddenly be faced with huge
numbers of ambiguity errors. This was discussed on the -v3 list;
- Nathan Myers [73]sums things up here.
+ Nathan Myers [74]sums things up here.
The g++-3 headers are not ours
If you have found an extremely broken header file which is causing
problems for you, look carefully before submitting a "high" priority
bug report (which you probably shouldn't do anyhow; see the last
- paragraph of the page describing [74]the GCC bug database).
+ paragraph of the page describing [75]the GCC bug database).
If the headers are in ${prefix}/include/g++-3, or if the installed
library's name looks like libstdc++-2.10.a or libstdc++-libc6-2.10.so,
Currently our header files are installed in ${prefix}/include/g++-v3
(see the 'v'?). This may change with the next release of GCC, as it
- may be too confusing, but [75]the question has not yet been decided.
+ may be too confusing, but [76]the question has not yet been decided.
glibc If you're on a GNU/Linux system and have just upgraded to glibc
2.2, but are still using gcc 2.95.2, then you should have read the
http://clisp.cons.org/~haible/gccinclude-glibc-2.2-compat.diff
- Note that 2.95.x shipped with the [76]old v2 library which is no
+ Note that 2.95.x shipped with the [77]old v2 library which is no
longer maintained. Also note that gcc 2.95.3 fixes this problem, but
requires a separate patch for libstdc++-v3.
visibility, or you just plain forgot, etc).
More information, including how to optionally enable/disable the
- checks, is available [77]here.
+ checks, is available [78]here.
_________________________________________________________________
4.5 Aw, that's easy to fix!
If you have found a bug in the library and you think you have a
working fix, then send it in! The main GCC site has a page on
- [78]submitting patches that covers the procedure, but for libstdc++
+ [79]submitting patches that covers the procedure, but for libstdc++
you should also send the patch to our mailing list in addition to the
- GCC patches mailing list. The libstdc++ [79]contributors' page also
+ GCC patches mailing list. The libstdc++ [80]contributors' page also
talks about how to submit patches.
In addition to the description, the patch, and the ChangeLog entry, it
is a Good Thing if you can additionally create a small test program to
test for the presence of the bug that your patch fixes. Bugs have a
way of being reintroduced; if an old bug creeps back in, it will be
- caught immediately by the [80]testsuite -- but only if such a test
+ caught immediately by the [81]testsuite -- but only if such a test
exists.
_________________________________________________________________
libstdc++. Some of that is already happening, see 4.2. Some of
those changes are being predicted by the library maintainers, and
we add code to the library based on what the current proposed
- resolution specifies. Those additions are listed in [81]the
+ resolution specifies. Those additions are listed in [82]the
extensions page.
2. Performance tuning. Lots of performance tuning. This too is
already underway for post-3.0 releases, starting with memory
type from C99.) Bugfixes and rewrites (to improve or fix thread
safety, for instance) will of course be a continuing task.
- [82]This question about the next libstdc++ prompted some brief but
- interesting [83]speculation.
+ [83]This question about the next libstdc++ prompted some brief but
+ interesting [84]speculation.
_________________________________________________________________
5.3 What about the STL from SGI?
- The [84]STL from SGI, version 3.3, was the most recent merge of the
+ The [85]STL from SGI, version 3.3, was the most recent merge of the
STL codebase. The code in libstdc++ contains many fixes and changes,
and it is very likely that the SGI code is no longer under active
development. We expect that no future merges will take place.
#include <ext/hash_map>
- Extensions to the library have [85]their own page.
+ Extensions to the library have [86]their own page.
_________________________________________________________________
5.5 [removed]
otherwise documented as safe, do not assume that two threads may
access a shared standard library object at the same time.
- See chapters [86]17 (library introduction), [87]23 (containers), and
- [88]27 (I/O) for more information.
+ See chapters [87]17 (library introduction), [88]23 (containers), and
+ [89]27 (I/O) for more information.
_________________________________________________________________
5.7 How do I get a copy of the ISO C++ Standard?
their two-meeting commitment for voting rights, may get a copy of the
standard from their respective national standards organization. In the
USA, this national standards organization is ANSI and their website is
- right [89]here. (And if you've already registered with them, clicking
- this link will take you to directly to the place where you can [90]buy
+ right [90]here. (And if you've already registered with them, clicking
+ this link will take you to directly to the place where you can [91]buy
the standard on-line.
- Who is your country's member body? Visit the [91]ISO homepage and find
+ Who is your country's member body? Visit the [92]ISO homepage and find
out!
_________________________________________________________________
encompasses the standard library.
_________________________________________________________________
- See [92]license.html for copying conditions. Comments and suggestions
- are welcome, and may be sent to [93]the libstdc++ mailing list.
+ See [93]license.html for copying conditions. Comments and suggestions
+ are welcome, and may be sent to [94]the libstdc++ mailing list.
References
63. http://www.gnu.org/software/cvs/cvs.html
64. http://www.cvshome.org/
65. ../18_support/howto.html
- 66. http://gcc.gnu.org/ml/libstdc++/2000-12/msg00279.html
- 67. http://gcc.gnu.org/install/configure.html
- 68. http://gcc.gnu.org/ml/libstdc++/1998/msg00006.html
- 69. http://www.cantrip.org/draft-bugs.txt
- 70. http://anubis.dkuug.dk/jtc1/sc22/wg21/
- 71. ../faq/index.html#5_2
- 72. ../ext/howto.html#5
- 73. http://gcc.gnu.org/ml/libstdc++/2001-01/msg00247.html
- 74. http://gcc.gnu.org/gnatswrite.html
- 75. http://gcc.gnu.org/ml/gcc/2000-10/msg00732.html
- 76. ../faq/index.html#4_4_interface
- 77. ../19_diagnostics/howto.html#3
- 78. http://gcc.gnu.org/contribute.html
- 79. ../17_intro/contribute.html
- 80. ../faq/index.html#2_4
- 81. ../ext/howto.html#5
- 82. http://gcc.gnu.org/ml/libstdc++/1999/msg00080.html
- 83. http://gcc.gnu.org/ml/libstdc++/1999/msg00084.html
- 84. http://www.sgi.com/Technology/STL/
- 85. ../ext/howto.html
- 86. ../17_intro/howto.html#3
- 87. ../23_containers/howto.html#3
- 88. ../27_io/howto.html#9
- 89. http://www.ansi.org/
- 90. http://webstore.ansi.org/ansidocstore/product.asp?sku=ISO%2FIEC+14882%2D1998
- 91. http://www.iso.ch/
- 92. ../17_intro/license.html
- 93. mailto:libstdc++@gcc.gnu.org
+ 66. http://gcc.gnu.org/install/configure.html
+ 67. http://gcc.gnu.org/bugs.html
+ 68. http://gcc.gnu.org/ml/libstdc++/2002-02/msg00034.html
+ 69. http://gcc.gnu.org/ml/libstdc++/1998/msg00006.html
+ 70. http://www.cantrip.org/draft-bugs.txt
+ 71. http://anubis.dkuug.dk/jtc1/sc22/wg21/
+ 72. ../faq/index.html#5_2
+ 73. ../ext/howto.html#5
+ 74. http://gcc.gnu.org/ml/libstdc++/2001-01/msg00247.html
+ 75. http://gcc.gnu.org/gnatswrite.html
+ 76. http://gcc.gnu.org/ml/gcc/2000-10/msg00732.html
+ 77. ../faq/index.html#4_4_interface
+ 78. ../19_diagnostics/howto.html#3
+ 79. http://gcc.gnu.org/contribute.html
+ 80. ../17_intro/contribute.html
+ 81. ../faq/index.html#2_4
+ 82. ../ext/howto.html#5
+ 83. http://gcc.gnu.org/ml/libstdc++/1999/msg00080.html
+ 84. http://gcc.gnu.org/ml/libstdc++/1999/msg00084.html
+ 85. http://www.sgi.com/Technology/STL/
+ 86. ../ext/howto.html
+ 87. ../17_intro/howto.html#3
+ 88. ../23_containers/howto.html#3
+ 89. ../27_io/howto.html#9
+ 90. http://www.ansi.org/
+ 91. http://webstore.ansi.org/ansidocstore/product.asp?sku=ISO%2FIEC+14882%2D1998
+ 92. http://www.iso.ch/
+ 93. ../17_intro/license.html
+ 94. mailto:libstdc++@gcc.gnu.org
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