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First test of Darwin port with POSIX semaphore code.
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‎src/backend/port/darwin/Makefile

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# Makefile for port/darwin
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#
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# IDENTIFICATION
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# $Header: /cvsroot/pgsql/src/backend/port/darwin/Makefile,v 1.2 2001/11/08 04:24:03 tgl Exp $
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# $Header: /cvsroot/pgsql/src/backend/port/darwin/Makefile,v 1.3 2002/05/05 01:03:26 tgl Exp $
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#
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#-------------------------------------------------------------------------
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subdir = src/backend/port/darwin
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top_builddir = ../../../..
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include $(top_builddir)/src/Makefile.global
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OBJS = sem.o system.o
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OBJS = system.o
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all: SUBSYS.o
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‎src/backend/port/darwin/README

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@@ -16,23 +16,11 @@ Radar Bug#s 2767956, 2683531, 2805147. One hopes we can retire this
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kluge in the not too distant future.
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As of PostgreSQL 7.2 and Mac OS X 10.1, one should expect warnings
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As of PostgreSQL 7.3 and Mac OS X 10.1, one should expect warnings
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like these while linking the backend:
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/usr/bin/ld: warning unused multiple definitions of symbol _system
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port/SUBSYS.o definition of _system in section (__TEXT,__text)
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/usr/lib/libm.dylib(system.o) unused definition of _system
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/usr/bin/ld: warning unused multiple definitions of symbol _semctl
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port/SUBSYS.o definition of _semctl in section (__TEXT,__text)
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/usr/lib/libm.dylib(semctl.o) unused definition of _semctl
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/usr/bin/ld: warning unused multiple definitions of symbol _semget
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port/SUBSYS.o definition of _semget in section (__TEXT,__text)
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/usr/lib/libm.dylib(semget.o) unused definition of _semget
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/usr/bin/ld: warning unused multiple definitions of symbol _semop
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port/SUBSYS.o definition of _semop in section (__TEXT,__text)
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/usr/lib/libm.dylib(semop.o) unused definition of _semop
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The first of these shows us overriding system() per the above-described
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hack. The rest show sem.c overriding the nonfunctional semaphore stubs
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in libc. (Perhaps sem.c can also be retired someday, but semget support
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is reportedly not high on Apple's to-do list.)
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These are due to overriding system() per the above-described hack.

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