From c3b0baf910f3428df8b30144c1e4034c04ebe495 Mon Sep 17 00:00:00 2001
From: Noah Misch <noah@leadboat.com>
Date: Sun, 1 Mar 2015 13:05:23 -0500
Subject: [PATCH] Unlink static libraries before rebuilding them.

When the library already exists in the build directory, "ar" preserves
members not named on its command line.  This mattered when, for example,
a "configure" rerun dropped a file from $(LIBOBJS).  libpgport carried
the obsolete member until "make clean".  Back-patch to 9.0 (all
supported versions).
---
 src/Makefile.shlib | 3 +++
 src/port/Makefile  | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/src/Makefile.shlib b/src/Makefile.shlib
index 21ae9b37a11..e728801f5fc 100644
--- a/src/Makefile.shlib
+++ b/src/Makefile.shlib
@@ -318,6 +318,7 @@ all-shared-lib: $(shlib)
 
 ifndef haslibarule
 $(stlib): $(OBJS) | $(SHLIB_PREREQS)
+	rm -f $@
 	$(LINK.static) $@ $^
 	$(RANLIB) $@
 endif #haslibarule
@@ -360,6 +361,7 @@ else # PORTNAME == aix
 
 # AIX case
 $(shlib) $(stlib): $(OBJS) | $(SHLIB_PREREQS)
+	rm -f $(stlib)
 	$(LINK.static) $(stlib) $^
 	$(RANLIB) $(stlib)
 	$(MKLDEXPORT) $(stlib) >$(exports_file)
@@ -380,6 +382,7 @@ $(shlib): $(OBJS) | $(SHLIB_PREREQS)
 	$(CC) $(CFLAGS)  -shared -o $@  $(OBJS) $(LDFLAGS) $(LDFLAGS_SL) $(SHLIB_LINK) $(LIBS) $(LDAP_LIBS_BE)
 
 $(stlib): $(OBJS) | $(SHLIB_PREREQS)
+	rm -f $@
 	$(LINK.static) $@ $^
 	$(RANLIB) $@
 
diff --git a/src/port/Makefile b/src/port/Makefile
index bace576d803..67677ae8937 100644
--- a/src/port/Makefile
+++ b/src/port/Makefile
@@ -50,6 +50,7 @@ uninstall:
 	rm -f '$(DESTDIR)$(libdir)/libpgport.a'
 
 libpgport.a: $(OBJS)
+	rm -f $@
 	$(AR) $(AROPT) $@ $^
 
 # thread.o needs PTHREAD_CFLAGS (but thread_srv.o does not)
@@ -60,6 +61,7 @@ thread.o: CFLAGS+=$(PTHREAD_CFLAGS)
 #
 
 libpgport_srv.a: $(OBJS_SRV)
+	rm -f $@
 	$(AR) $(AROPT) $@ $^
 
 # Because this uses its own compilation rule, it doesn't use the