postgresql/src/port/Makefile

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#-------------------------------------------------------------------------
#
# Makefile
# Makefile for src/port
#
# These files are used by the Postgres backend, and also by frontend
# programs. Primarily, they are meant to provide portability on systems
# with broken/missing library files.
#
# This makefile generates three outputs:
#
# libpgport.a - contains object files with FRONTEND defined,
# for use by client applications
#
# libpgport_shlib.a - contains object files with FRONTEND defined,
# built suitably for use in shared libraries; for use
# by libpq and other frontend libraries
#
# libpgport_srv.a - contains object files without FRONTEND defined,
# for use only by the backend
#
# LIBOBJS is set by configure (via Makefile.global) to be the list of object
# files that are conditionally needed as determined by configure's probing.
# OBJS adds additional object files that are always compiled.
#
# IDENTIFICATION
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# src/port/Makefile
#
#-------------------------------------------------------------------------
subdir = src/port
top_builddir = ../..
include $(top_builddir)/src/Makefile.global
override CPPFLAGS := -I$(top_builddir)/src/port -DFRONTEND $(CPPFLAGS)
LIBS += $(PTHREAD_LIBS)
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OBJS = $(LIBOBJS) $(PG_CRC32C_OBJS) chklocale.o erand48.o inet_net_ntop.o \
noblock.o path.o pgcheckdir.o pgmkdirp.o pgsleep.o \
pgstrcasecmp.o pqsignal.o \
qsort.o qsort_arg.o quotes.o snprintf.o sprompt.o strerror.o \
tar.o thread.o
Replace PostmasterRandom() with a stronger source, second attempt. This adds a new routine, pg_strong_random() for generating random bytes, for use in both frontend and backend. At the moment, it's only used in the backend, but the upcoming SCRAM authentication patches need strong random numbers in libpq as well. pg_strong_random() is based on, and replaces, the existing implementation in pgcrypto. It can acquire strong random numbers from a number of sources, depending on what's available: - OpenSSL RAND_bytes(), if built with OpenSSL - On Windows, the native cryptographic functions are used - /dev/urandom Unlike the current pgcrypto function, the source is chosen by configure. That makes it easier to test different implementations, and ensures that we don't accidentally fall back to a less secure implementation, if the primary source fails. All of those methods are quite reliable, it would be pretty surprising for them to fail, so we'd rather find out by failing hard. If no strong random source is available, we fall back to using erand48(), seeded from current timestamp, like PostmasterRandom() was. That isn't cryptographically secure, but allows us to still work on platforms that don't have any of the above stronger sources. Because it's not very secure, the built-in implementation is only used if explicitly requested with --disable-strong-random. This replaces the more complicated Fortuna algorithm we used to have in pgcrypto, which is unfortunate, but all modern platforms have /dev/urandom, so it doesn't seem worth the maintenance effort to keep that. pgcrypto functions that require strong random numbers will be disabled with --disable-strong-random. Original patch by Magnus Hagander, tons of further work by Michael Paquier and me. Discussion: https://www.postgresql.org/message-id/CAB7nPqRy3krN8quR9XujMVVHYtXJ0_60nqgVc6oUk8ygyVkZsA@mail.gmail.com Discussion: https://www.postgresql.org/message-id/CAB7nPqRWkNYRRPJA7-cF+LfroYV10pvjdz6GNvxk-Eee9FypKA@mail.gmail.com
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ifeq ($(enable_strong_random), yes)
OBJS += pg_strong_random.o
endif
# libpgport.a, libpgport_shlib.a, and libpgport_srv.a contain the same files
# foo.o, foo_shlib.o, and foo_srv.o are all built from foo.c
OBJS_SHLIB = $(OBJS:%.o=%_shlib.o)
OBJS_SRV = $(OBJS:%.o=%_srv.o)
all: libpgport.a libpgport_shlib.a libpgport_srv.a
# libpgport is needed by some contrib
# currently we don't install libpgport_shlib.a, maybe we should?
install: all installdirs
$(INSTALL_STLIB) libpgport.a '$(DESTDIR)$(libdir)/libpgport.a'
installdirs:
$(MKDIR_P) '$(DESTDIR)$(libdir)'
uninstall:
rm -f '$(DESTDIR)$(libdir)/libpgport.a'
libpgport.a: $(OBJS)
rm -f $@
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$(AR) $(AROPT) $@ $^
# thread.o and thread_shlib.o need PTHREAD_CFLAGS (but thread_srv.o does not)
thread.o: CFLAGS+=$(PTHREAD_CFLAGS)
thread_shlib.o: CFLAGS+=$(PTHREAD_CFLAGS)
# all versions of pg_crc32c_sse42.o need CFLAGS_SSE42
pg_crc32c_sse42.o: CFLAGS+=$(CFLAGS_SSE42)
pg_crc32c_sse42_shlib.o: CFLAGS+=$(CFLAGS_SSE42)
pg_crc32c_sse42_srv.o: CFLAGS+=$(CFLAGS_SSE42)
# all versions of pg_crc32c_armv8.o need CFLAGS_ARMV8_CRC32C
pg_crc32c_armv8.o: CFLAGS+=$(CFLAGS_ARMV8_CRC32C)
pg_crc32c_armv8_shlib.o: CFLAGS+=$(CFLAGS_ARMV8_CRC32C)
pg_crc32c_armv8_srv.o: CFLAGS+=$(CFLAGS_ARMV8_CRC32C)
#
# Shared library versions of object files
#
libpgport_shlib.a: $(OBJS_SHLIB)
rm -f $@
$(AR) $(AROPT) $@ $^
# Because this uses its own compilation rule, it doesn't use the
# dependency tracking logic from Makefile.global. To make sure that
# dependency tracking works anyway for the *_shlib.o files, depend on
# their *.o siblings as well, which do have proper dependencies. It's
# a hack that might fail someday if there is a *_shlib.o without a
# corresponding *.o, but there seems little reason for that.
%_shlib.o: %.c %.o
$(CC) $(CFLAGS) $(CFLAGS_SL) $(CPPFLAGS) -c $< -o $@
#
# Server versions of object files
#
libpgport_srv.a: $(OBJS_SRV)
rm -f $@
$(AR) $(AROPT) $@ $^
# Because this uses its own compilation rule, it doesn't use the
# dependency tracking logic from Makefile.global. To make sure that
# dependency tracking works anyway for the *_srv.o files, depend on
# their *.o siblings as well, which do have proper dependencies. It's
# a hack that might fail someday if there is a *_srv.o without a
# corresponding *.o, but it works for now (and those would probably go
# into src/backend/port/ anyway).
%_srv.o: %.c %.o
$(CC) $(CFLAGS) $(subst -DFRONTEND,, $(CPPFLAGS)) -c $< -o $@
# Dependency is to ensure that path changes propagate
path.o: path.c pg_config_paths.h
path_shlib.o: path.c pg_config_paths.h
path_srv.o: path.c pg_config_paths.h
# We create a separate file rather than put these in pg_config.h
# because many of these values come from makefiles and are not
# available to configure.
pg_config_paths.h: $(top_builddir)/src/Makefile.global
echo "#define PGBINDIR \"$(bindir)\"" >$@
echo "#define PGSHAREDIR \"$(datadir)\"" >>$@
echo "#define SYSCONFDIR \"$(sysconfdir)\"" >>$@
echo "#define INCLUDEDIR \"$(includedir)\"" >>$@
echo "#define PKGINCLUDEDIR \"$(pkgincludedir)\"" >>$@
echo "#define INCLUDEDIRSERVER \"$(includedir_server)\"" >>$@
echo "#define LIBDIR \"$(libdir)\"" >>$@
echo "#define PKGLIBDIR \"$(pkglibdir)\"" >>$@
echo "#define LOCALEDIR \"$(localedir)\"" >>$@
echo "#define DOCDIR \"$(docdir)\"" >>$@
echo "#define HTMLDIR \"$(htmldir)\"" >>$@
echo "#define MANDIR \"$(mandir)\"" >>$@
clean distclean maintainer-clean:
rm -f libpgport.a libpgport_shlib.a libpgport_srv.a
rm -f $(OBJS) $(OBJS_SHLIB) $(OBJS_SRV) pg_config_paths.h