Thread: pgsql: Unlink static libraries before rebuilding them.

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).

Branch
------
REL9_3_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/585f16dc80337a2ee7b0e823c7ff42a9e10d1d88

Modified Files
--------------
src/Makefile.shlib  |    3 +++
src/common/Makefile |    2 ++
src/port/Makefile   |    2 ++
3 files changed, 7 insertions(+)