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Commite548455

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aix: when building with gcc, tell gcc we're building a shared library
Not passing -shared to gcc when building a shared library triggers linking tothe wrong libgcc (libgcc.a instead of libgcc_s.a) and prevents emittingcorrect unwind information. It's somewhat surprising that this hasn't causedknown problems so far.Doing so requires adding path to libgcc to libpath, or linking statically tolibgcc - as the latter increases .so size substantially (for not entirelyobvious reasons), shared linking seems preferrable. It likely is worthbuilding executables with -shared-libgcc too, but I've not done that here.Discussion:https://postgr.es/m/20220820174213.d574qde4ptwdzoqz@awork3.anarazel.de
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‎src/makefiles/Makefile.aix

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@@ -8,10 +8,21 @@ AROPT = crs
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# -blibpath must contain ALL directories where we should look for libraries
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libpath := $(shell echo $(subst -L,:,$(filter -L/%,$(LDFLAGS))) | sed -e's/ //g'):/usr/lib:/lib
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# when building with gcc, need to make sure that libgcc can be found
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ifeq ($(GCC), yes)
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libpath := $(libpath):$(dir $(shell gcc -print-libgcc-file-name))
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endif
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rpath = -Wl,-blibpath:'$(rpathdir)$(libpath)'
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LDFLAGS_SL += -Wl,-bnoentry -Wl,-H512 -Wl,-bM:SRE
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# gcc needs to know it's building a shared lib, otherwise it'll not emit
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# correct code / link to the right support libraries
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ifeq ($(GCC), yes)
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LDFLAGS_SL += -shared
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endif
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# env var name to use in place of LD_LIBRARY_PATH
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ld_library_path_var = LIBPATH
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