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Add documentation on the use of *printf() macros and libintl.

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Backpatch to 8.1.X.
This commit is contained in:
Bruce Momjian
2005-12-06 18:35:10 +00:00
parent 73f47aa0cd
commit ca430500ce
3 changed files with 63 additions and 16 deletions
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35
configure vendored
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@ -13894,11 +13894,31 @@ fi
# have all the features we need --- see below.
if test "$PORTNAME" = "win32"; then
# Win32 gets this built unconditionally
# libintl versions prior to 0.13 use the native *printf functions.
# Win32 *printf does not understand %$, so on Win32 using pre-0.13 libintl
# it is necessary to use the pg versions of *printf to properly process
# NLS strings that use the %$ format.
# Win32 gets snprintf.c built unconditionally.
#
# To properly translate all NLS languages strings, we must support the
# *printf() %$ format, which allows *printf() arguments to be selected
# by position in the translated string.
#
# libintl versions < 0.13 use the native *printf() functions, and Win32
# *printf() doesn't understand %$, so we must use our /port versions,
# which do understand %$. libintl versions >= 0.13 include their own
# *printf versions on Win32. The libintl 0.13 release note text is:
#
# C format strings with positions, as they arise when a translator
# needs to reorder a sentence, are now supported on all platforms.
# On those few platforms (NetBSD and Woe32) for which the native
# printf()/fprintf()/... functions don't support such format
# strings, replacements are provided through <libintl.h>.
#
# We could use libintl >= 0.13's *printf() if we were sure that we had
# a litint >= 0.13 at runtime, but seeing that there is no clean way
# to guarantee that, it is best to just use our own, so we are sure to
# get %$ support. In include/port.h we disable the *printf() macros
# that might have been defined by libintl.
#
# We do this unconditionally whether NLS is used or not so we are sure
# that all Win32 libraries and binaries behave the same.
pgac_need_repl_snprintf=yes
else
pgac_need_repl_snprintf=no
@ -17158,9 +17178,12 @@ fi
rm -f core *.core gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
fi
# --------------------
# Run tests below here
# --------------------
# Force use of our snprintf if system's doesn't do arg control
# This feature is needed by NLS
# See comment above at snprintf test for details.
if test "$enable_nls" = yes -a "$pgac_need_repl_snprintf" = no; then
echo "$as_me:$LINENO: checking whether printf supports argument control" >&5
echo $ECHO_N "checking whether printf supports argument control... $ECHO_C" >&6