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aix: No need to use mkldexport when we want to export all symbols

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When building a shared library with exports.txt there's no need to build an
intermediary static library, we can just pass -Wl,-bE:... when generating the
.so.

When building a shared library without exports.txt, there's no need to call
mkldexport.sh to export all symbols, because all symbols are exported anyway,
and we don't need the export file on the import side (like we do for
postgres.imp).

This makes building .so's on aix a lot more similar to building on other
platforms. In particular, we don't create and remove a .a of the same name but
different contents anymore.

Discussion: https://postgr.es/m/20220820174213.d574qde4ptwdzoqz@awork3.anarazel.de
This commit is contained in:
Andres Freund 2022-09-09 19:11:49 -07:00
parent b7050e2584
commit fe6a64a58a
2 changed files with 20 additions and 33 deletions
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45
src/Makefile.shlib
View File

@ -107,12 +107,17 @@ override CPPFLAGS += -DSO_MAJOR_VERSION=$(SO_MAJOR_VERSION)
endif
ifeq ($(PORTNAME), aix)
LINK.shared = $(COMPILER)
ifdef SO_MAJOR_VERSION
shlib = lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)
endif
haslibarule = yes
# $(exports_file) is also usable as an import file
exports_file = lib$(NAME).exp
BUILD.exports = ( echo '\#! $(shlib)'; $(AWK) '/^[^\#]/ {printf "%s\n",$$1}' $< ) > $@
ifneq (,$(SHLIB_EXPORTS))
LINK.shared += -Wl,-bE:$(exports_file)
endif
endif
ifeq ($(PORTNAME), darwin)
@ -259,9 +264,15 @@ $(stlib): $(OBJS) | $(SHLIB_PREREQS)
touch $@
endif #haslibarule
# AIX wraps shared libraries inside a static library, can be used both
# for static and shared linking
ifeq ($(PORTNAME), aix)
$(stlib): $(shlib)
rm -f $(stlib)
$(AR) $(AROPT) $(stlib) $(shlib)
endif # aix
ifeq (,$(filter cygwin win32,$(PORTNAME)))
ifneq ($(PORTNAME), aix)
# Normal case
$(shlib): $(OBJS) | $(SHLIB_PREREQS)
@ -274,9 +285,12 @@ ifneq ($(shlib), $(shlib_major))
endif
# Make sure we have a link to a name without any version numbers
ifneq ($(shlib), $(shlib_bare))
# except on AIX, where that's not a thing
ifneq ($(PORTNAME), aix)
rm -f $(shlib_bare)
$(LN_S) $(shlib) $(shlib_bare)
endif
endif # aix
endif # shlib_bare
endif # shlib_major
# Where possible, restrict the symbols exported by the library to just the
@ -285,36 +299,13 @@ endif # shlib_major
# libpgport along with libpq.
ifneq (,$(SHLIB_EXPORTS))
ifdef BUILD.exports
$(shlib): $(SHLIB_EXPORTS:%.txt=%.list)
$(shlib): $(exports_file)
$(SHLIB_EXPORTS:%.txt=%.list): %.list: %.txt
$(exports_file): $(SHLIB_EXPORTS)
$(BUILD.exports)
endif
endif
else # PORTNAME == aix
# AIX case
# See notes in src/backend/parser/Makefile about the following two rules
$(stlib): $(shlib)
touch $@
$(shlib): $(OBJS) | $(SHLIB_PREREQS)
rm -f $(stlib)
$(LINK.static) $(stlib) $^
$(RANLIB) $(stlib)
ifeq (,$(SHLIB_EXPORTS))
$(MKLDEXPORT) $(stlib) $(shlib) >$(exports_file)
else
( echo '#! $(shlib)'; $(AWK) '/^[^#]/ {printf "%s\n",$$1}' ${srcdir}/$(SHLIB_EXPORTS) ) >$(exports_file)
endif
$(COMPILER) -o $(shlib) $(stlib) -Wl,-bE:$(exports_file) $(LDFLAGS) $(LDFLAGS_SL) $(SHLIB_LINK)
rm -f $(stlib)
$(AR) $(AROPT) $(stlib) $(shlib)
endif # PORTNAME == aix
else # PORTNAME == cygwin || PORTNAME == win32
ifeq ($(PORTNAME), cygwin)

8
src/makefiles/Makefile.aix
View File

@ -38,9 +38,5 @@ endif
MKLDEXPORT_DIR=src/backend/port/aix
MKLDEXPORT=$(top_srcdir)/$(MKLDEXPORT_DIR)/mkldexport.sh
%.exp: %.o
$(MKLDEXPORT) $^ >$@
# Rule for building a shared library from a single .o file
%$(DLSUFFIX): %.o %.exp
$(CC) $(CFLAGS) $*.o $(LDFLAGS) $(LDFLAGS_SL) -o $@ -Wl,-bE:$*.exp $(BE_DLLLIBS)
%$(DLSUFFIX): %.o
$(CC) $(CFLAGS) $*.o $(LDFLAGS) $(LDFLAGS_SL) -o $@ $(BE_DLLLIBS)