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We've had support for using unnamed POSIX semaphores instead of System V
semaphores for quite some time, but it was not used by default on any
platform. Since many systems have rather small limits on the number of
SysV semaphores allowed, it seems desirable to switch to POSIX semaphores
where they're available and don't create performance or kernel resource
problems. Experimentation by me shows that unnamed POSIX semaphores
are at least as good as SysV semaphores on Linux, and we previously had
a report from Maksym Sobolyev that FreeBSD is significantly worse with
SysV semaphores than POSIX ones. So adjust those two platforms to use
unnamed POSIX semaphores, if configure can find the necessary library
functions. If this goes well, we may switch other platforms as well,
but it would be advisable to test them individually first.
It's not currently contemplated that we'd encourage users to select
a semaphore API for themselves, but anyone who wants to experiment
can add PREFERRED_SEMAPHORES=UNNAMED_POSIX (or NAMED_POSIX, or SYSV)
to their configure command line to do so.
I also tweaked configure to report which API it's selected, mainly
so that we can tell that from buildfarm reports.
I did not touch the user documentation's discussion about semaphores;
that will need some adjustment once the dust settles.
Discussion: <8536.1475704230@sss.pgh.pa.us>
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handles that, and make solaris debug use no optimization.
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-D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS
for all ports. It can't hurt if they are not supported, but it makes
our job easier for porting.
Should fix Darwin compile and other platforms without mucking with the
thread detection code.
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Allow additional thread flags to be added via port templates.
Change thread flag names to PTHREAD_CFLAGS and PTHREAD_LIBS to match new
configure script.
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variable.
Remove thread locking for non-thread-safe functions, instead throw a
compile error.
Platforms will have to re-run tools/thread to record their thread
safety.
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option -fno-strict-aliasing is available.
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than having CFLAGS= in the template files.
It uses -O2 for gcc (generated by autoconf), and -O for non-gcc, unless
the template overrides it.
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and improve tests.
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* use non-*_r function names if they are all thread-safe
* (NEED_REENTRANT_FUNCS=no)
* use *_r functions if they exist (configure test)
* do our own locking and copying of non-threadsafe functions
New to this patch is the last option.
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configure to report if they are not found.
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configuration.
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Context diff this time.
Remove -m486 compile args for FreeBSD-i386, compile -O2 on i386.
Compile with only -O on alpha for codegen safety.
Make the port use the TEST_AND_SET for alpha and i386 on FreeBSD.
Fix a lot of bogus string formats for outputting pointers (cast to int
and %u/%x replaced with no cast and %p), and 'Size'(size_t) are now
cast to 'unsigned long' and output with %lu/
Remove an unused variable.
Alfred Perlstein
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Makefile.port, since they are of no use to configure and much of the
library magic happens in Makefile.port anyway.
Use __alpha, not __alpha__, since the former is universally available.
Remove -DNOFIXADE from the compile command line and put it in the port
include file.
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Read templates after compiler is detected. Convert all templates to real
shell scripts. Rename bsd->openbsd, alpha->osf.
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CPP) to create platform independent files. Unfortunately, that means that
every config.status (or configure) run invariably causes a relink of the
postmaster and also that we can't put these files in the distribution
(usefully). So we make it a little smarter: when the output files already
exist and it notices that it would recreate them in identical form, it
doesn't touch them. In order to avoid re-running the make rule all the time
we update a timestamp file instead.
Update release_prep accordingly. Also make Gen_fmgrtab.sh use the awk that
is detected at configure time, not necessarily named `awk' and have it check
for exit statuses a little better.
In other news... Remove USE_LOCALE from the templates, it was set to `no'
everywhere anyway. Also remove YACC and YFLAGS from the templates, configure
is smart enough to find bison or yacc itself. Use AC_PROG_YACC for that
instead of the hand-crafted code. Do not set YFLAGS to `-d'. The make rules
that need this flag should explicitly invoke it. YFLAGS should be a user
variable. Update the makefiles to that effect.
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Clean up the .sample files...comment out all sample entries except for
the localhost one
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FreeBSD
The Makefile(s) have all been cleaned up such that there is a single
LDFLAGS vs LD_ADD or LDADD or LDFLAGS or LDFLAGS_BE. The Makefile(s)
should be alot more straightforward then they were before...and
consistent
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Further extended Makefile.global/build/configure so that we can
have a 'template' file for each OS (and each version of OS, as in BSDi)
which is used as much as possible to generate Makefile.global
Any future ports should look at using the template file as a basis,
before moving over to Makefile.global.
This will most probably break alot of the ports, atho I've tried to
be very neat about it...
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