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Move configure --disable-float8-byval to pg_config_manual.h

Browse Source 
This build option was once useful to maintain compatibility with
version-0 functions, but those are no longer supported, so this option
is no longer useful for end users.  We keep the option available to
developers in pg_config_manual.h so that it is easy to test the
pass-by-reference code paths without having to fire up a 32-bit
machine.

Discussion: https://www.postgresql.org/message-id/flat/f3e1e576-2749-bbd7-2d57-3f9dcf75255a@2ndquadrant.com
This commit is contained in:
Peter Eisentraut 2019-11-27 11:21:02 +01:00
parent 47a3c7fa06
commit 4513d8b07b
8 changed files with 19 additions and 141 deletions
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76
configure vendored
View File

@ -866,7 +866,6 @@ with_system_tzdata
with_zlib
with_gnu_ld
enable_largefile
enable_float8_byval
'
ac_precious_vars='build_alias
host_alias
@ -1524,7 +1523,6 @@ Optional Features:
--enable-cassert enable assertion checks (for debugging)
--disable-thread-safety disable thread-safety in client libraries
--disable-largefile omit support for large files
--disable-float8-byval disable float8 passed by value
Optional Packages:
--with-PACKAGE[=ARG] use PACKAGE [ARG=yes]
@ -16745,80 +16743,6 @@ _ACEOF
# Decide whether float8 is passed by value.
# Note: this setting also controls int8 and related types such as timestamp.
# If sizeof(Datum) >= 8, this is user-selectable, enabled by default.
# If not, trying to select it is an error.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to build with float8 passed by value" >&5
$as_echo_n "checking whether to build with float8 passed by value... " >&6; }
if test $ac_cv_sizeof_void_p -ge 8 ; then
# Check whether --enable-float8-byval was given.
if test "${enable_float8_byval+set}" = set; then :
enableval=$enable_float8_byval;
case $enableval in
yes)
:
;;
no)
:
;;
*)
as_fn_error $? "no argument expected for --enable-float8-byval option" "$LINENO" 5
;;
esac
else
enable_float8_byval=yes
fi
else
# Check whether --enable-float8-byval was given.
if test "${enable_float8_byval+set}" = set; then :
enableval=$enable_float8_byval;
case $enableval in
yes)
:
;;
no)
:
;;
*)
as_fn_error $? "no argument expected for --enable-float8-byval option" "$LINENO" 5
;;
esac
else
enable_float8_byval=no
fi
if test "$enable_float8_byval" = yes ; then
as_fn_error $? "--enable-float8-byval is not supported on 32-bit platforms." "$LINENO" 5
fi
fi
if test "$enable_float8_byval" = yes ; then
$as_echo "#define USE_FLOAT8_BYVAL 1" >>confdefs.h
float8passbyval=true
else
float8passbyval=false
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_float8_byval" >&5
$as_echo "$enable_float8_byval" >&6; }
cat >>confdefs.h <<_ACEOF
#define FLOAT8PASSBYVAL $float8passbyval
_ACEOF
# Determine memory alignment requirements for the basic C data types.
# The cast to long int works around a bug in the HP C Compiler,

23
configure.in
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@ -1941,29 +1941,6 @@ AC_CHECK_SIZEOF([void *])
AC_CHECK_SIZEOF([size_t])
AC_CHECK_SIZEOF([long])
# Decide whether float8 is passed by value.
# Note: this setting also controls int8 and related types such as timestamp.
# If sizeof(Datum) >= 8, this is user-selectable, enabled by default.
# If not, trying to select it is an error.
AC_MSG_CHECKING([whether to build with float8 passed by value])
if test $ac_cv_sizeof_void_p -ge 8 ; then
PGAC_ARG_BOOL(enable, float8-byval, yes, [disable float8 passed by value])
else
PGAC_ARG_BOOL(enable, float8-byval, no, [disable float8 passed by value])
if test "$enable_float8_byval" = yes ; then
AC_MSG_ERROR([--enable-float8-byval is not supported on 32-bit platforms.])
fi
fi
if test "$enable_float8_byval" = yes ; then
AC_DEFINE([USE_FLOAT8_BYVAL], 1,
[Define to 1 if you want float8, int8, etc values to be passed by value. (--enable-float8-byval)])
float8passbyval=true
else
float8passbyval=false
fi
AC_MSG_RESULT([$enable_float8_byval])
AC_DEFINE_UNQUOTED([FLOAT8PASSBYVAL], [$float8passbyval], [float8, int8, and related values are passed by value if 'true', by reference if 'false'])
# Determine memory alignment requirements for the basic C data types.
AC_CHECK_ALIGNOF(short)

16
doc/src/sgml/installation.sgml
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@ -1204,22 +1204,6 @@ build-postgresql:
</listitem>
</varlistentry>
<varlistentry>
<term><option>--disable-float8-byval</option></term>
<listitem>
<para>
Disable passing float8 values <quote>by value</quote>, causing them
to be passed <quote>by reference</quote> instead. This option costs
performance, but may be needed for compatibility with very old
user-defined functions written in C.
Note that this option affects not only float8, but also int8 and some
related types such as timestamp.
On 32-bit platforms, <option>--disable-float8-byval</option> is the default
and it is not allowed to select <option>--enable-float8-byval</option>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--disable-spinlocks</option></term>
<listitem>

6
src/include/c.h
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@ -491,6 +491,12 @@ typedef signed int Offset;
typedef float float4;
typedef double float8;
#ifdef USE_FLOAT8_BYVAL
#define FLOAT8PASSBYVAL true
#else
#define FLOAT8PASSBYVAL false
#endif
/*
* Oid, RegProcedure, TransactionId, SubTransactionId, MultiXactId,
* CommandId

8
src/include/pg_config.h.in
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@ -70,10 +70,6 @@
MSVC and with C++ compilers. */
#undef FLEXIBLE_ARRAY_MEMBER
/* float8, int8, and related values are passed by value if 'true', by
reference if 'false' */
#undef FLOAT8PASSBYVAL
/* Define to 1 if gettimeofday() takes only 1 argument. */
#undef GETTIMEOFDAY_1ARG
@ -898,10 +894,6 @@
/* Define to use /dev/urandom for random number generation */
#undef USE_DEV_URANDOM
/* Define to 1 if you want float8, int8, etc values to be passed by value.
(--enable-float8-byval) */
#undef USE_FLOAT8_BYVAL
/* Define to build with ICU support. (--with-icu) */
#undef USE_ICU

13
src/include/pg_config_manual.h
View File

@ -56,6 +56,19 @@
*/
#define PARTITION_MAX_KEYS 32
/*
* Decide whether built-in 8-byte types, including float8, int8, and
* timestamp, are passed by value. This is on by default if sizeof(Datum) >=
* 8 (that is, on 64-bit platforms). If sizeof(Datum) < 8 (32-bit platforms),
* this must be off. We keep this here as an option so that it is easy to
* test the pass-by-reference code paths on 64-bit platforms.
*
* Changing this requires an initdb.
*/
#if SIZEOF_VOID_P >= 8
#define USE_FLOAT8_BYVAL 1
#endif
/*
* When we don't have native spinlocks, we use semaphores to simulate them.
* Decreasing this value reduces consumption of OS resources; increasing it

15
src/tools/msvc/Solution.pm
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@ -29,12 +29,7 @@ sub _new
bless($self, $classname);
$self->DeterminePlatform();
my $bits = $self->{platform} eq 'Win32' ? 32 : 64;
$options->{float8byval} = ($bits == 64)
unless exists $options->{float8byval};
die "float8byval not permitted on 32 bit platforms"
if $options->{float8byval} && $bits == 32;
if ($options->{xslt} && !$options->{xml})
{
die "XSLT requires XML\n";
@ -207,16 +202,6 @@ sub GenerateFiles
print $o "#define XLOG_BLCKSZ ",
1024 * $self->{options}->{wal_blocksize}, "\n";
if ($self->{options}->{float8byval})
{
print $o "#define USE_FLOAT8_BYVAL 1\n";
print $o "#define FLOAT8PASSBYVAL true\n";
}
else
{
print $o "#define FLOAT8PASSBYVAL false\n";
}
if ($self->{options}->{uuid})
{
print $o "#define HAVE_UUID_OSSP\n";

3
src/tools/msvc/config_default.pl
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@ -5,9 +5,6 @@ use warnings;
our $config = {
asserts => 0, # --enable-cassert
# float8byval=> $platformbits == 64, # --disable-float8-byval,
# off by default on 32 bit platforms, on by default on 64 bit platforms
# blocksize => 8, # --with-blocksize, 8kB by default
# wal_blocksize => 8, # --with-wal-blocksize, 8kB by default
ldap => 1, # --with-ldap