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We were being careless in some places about the order of -L switches in link command lines, such that -L switches referring to external directories could come before those referring to directories within the build tree. This made it possible to accidentally link a system-supplied library, for example /usr/lib/libpq.so, in place of the one built in the build tree. Hilarity ensued, the more so the older the system-supplied library is. To fix, break LDFLAGS into two parts, a sub-variable LDFLAGS_INTERNAL and the main LDFLAGS variable, both of which are "recursively expanded" so that they can be incrementally adjusted by different makefiles. Establish a policy that -L switches for directories in the build tree must always be added to LDFLAGS_INTERNAL, while -L switches for external directories must always be added to LDFLAGS. This is sufficient to ensure a safe search order. For simplicity, we typically also put -l switches for the respective libraries into those same variables. (Traditional make usage would have us put -l switches into LIBS, but cleaning that up is a project for another day, as there's no clear need for it.) This turns out to also require separating SHLIB_LINK into two variables, SHLIB_LINK and SHLIB_LINK_INTERNAL, with a similar rule about which switches go into which variable. And likewise for PG_LIBS. Although this change might appear to affect external users of pgxs.mk, I think it doesn't; they shouldn't have any need to touch the _INTERNAL variables. In passing, tweak src/common/Makefile so that the value of CPPFLAGS recorded in pg_config lacks "-DFRONTEND" and the recorded value of LDFLAGS lacks "-L../../../src/common". Both of those things are mistakes, apparently introduced during prior code rearrangements, as old versions of pg_config don't print them. In general we don't want anything that's specific to the src/common subdirectory to appear in those outputs. This is certainly a bug fix, but in view of the lack of field complaints, I'm unsure whether it's worth the risk of back-patching. In any case it seems wise to see what the buildfarm makes of it first. Discussion: https://postgr.es/m/25214.1522604295@sss.pgh.pa.us
40 lines
1.2 KiB
Makefile
40 lines
1.2 KiB
Makefile
# contrib/jsonb_plpython/Makefile
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MODULE_big = jsonb_plpython$(python_majorversion)
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OBJS = jsonb_plpython.o $(WIN32RES)
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PGFILEDESC = "jsonb_plpython - transform between jsonb and plpythonu"
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PG_CPPFLAGS = -I$(top_srcdir)/src/pl/plpython $(python_includespec) -DPLPYTHON_LIBNAME='"plpython$(python_majorversion)"'
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EXTENSION = jsonb_plpythonu jsonb_plpython2u jsonb_plpython3u
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DATA = jsonb_plpythonu--1.0.sql jsonb_plpython2u--1.0.sql jsonb_plpython3u--1.0.sql
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REGRESS = jsonb_plpython
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REGRESS_PLPYTHON3_MANGLE := $(REGRESS)
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ifdef USE_PGXS
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PG_CONFIG = pg_config
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PGXS := $(shell $(PG_CONFIG) --pgxs)
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include $(PGXS)
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else
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subdir = contrib/jsonb_plpython
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top_builddir = ../..
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include $(top_builddir)/src/Makefile.global
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include $(top_srcdir)/contrib/contrib-global.mk
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endif
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# We must link libpython explicitly
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ifeq ($(PORTNAME), win32)
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# ... see silliness in plpython Makefile ...
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SHLIB_LINK_INTERNAL += $(sort $(wildcard ../../src/pl/plpython/libpython*.a))
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else
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rpathdir = $(python_libdir)
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SHLIB_LINK += $(python_libspec) $(python_additional_libs)
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endif
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ifeq ($(python_majorversion),2)
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REGRESS_OPTS += --load-extension=plpythonu --load-extension=jsonb_plpythonu
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endif
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include $(top_srcdir)/src/pl/plpython/regress-python3-mangle.mk
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