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Arrange to install a "posixrules" entry in our timezone database, so that

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POSIX-style timezone specs that don't exactly match any database entry will
be treated as having correct USA DST rules.  Also, document that this can
be changed if you want to use some other DST rules with a POSIX zone spec.

We could consider changing localtime.c's TZDEFRULESTRING, but since that
facility can only deal with one DST transition rule, it seems fairly useless
now; might as well just plan to override it using a "posixrules" entry.

Backpatch as far as 8.0.  There isn't much we can do in 7.x ... either your
libc gets it right, or it doesn't.
This commit is contained in:
Tom Lane
2007-03-14 17:38:06 +00:00
parent 754148d81f
commit 0169c354bf
2 changed files with 22 additions and 9 deletions
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8
src/timezone/Makefile
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@ -4,7 +4,7 @@
# Makefile for the timezone library
# IDENTIFICATION
# $PostgreSQL: pgsql/src/timezone/Makefile,v 1.25 2007/02/09 15:56:00 petere Exp $
# $PostgreSQL: pgsql/src/timezone/Makefile,v 1.26 2007/03/14 17:38:06 tgl Exp $
#
#-------------------------------------------------------------------------
@ -23,6 +23,10 @@ TZDATA = africa antarctica asia australasia europe northamerica southamerica \
pacificnew etcetera factory backward systemv solar87 solar88 solar89
TZDATAFILES = $(TZDATA:%=$(srcdir)/data/%)
# which zone should determine the DST rules (not the specific UTC offset!)
# for POSIX-style timezone specs
POSIXRULES = US/Eastern
all: SUBSYS.o submake-libpgport zic
SUBSYS.o: $(OBJS)
@ -32,7 +36,7 @@ zic: $(ZICOBJS)
$(CC) $(CFLAGS) $(ZICOBJS) $(LDFLAGS) $(LIBS) -o $@$(X)
install: all installdirs
./zic -d '$(DESTDIR)$(datadir)/timezone' $(TZDATAFILES)
./zic -d '$(DESTDIR)$(datadir)/timezone' -p '$(POSIXRULES)' $(TZDATAFILES)
$(MAKE) -C tznames $@
installdirs: