shared library support for HP-UX 10

Our somewhat outdated HP-UX support (which was targeted at HP-UX 10, not 11)
does not have support for shared library initialization and finalization
functions, nor for shared library export lists.  The former was causing
compilation failures unless shared library support was disabled.

* include/k5-platform.h: Expand on init/fini comments some more.
(MAKE_FINI_FUNCTION): Add an HP-UX specific variant that defines an auxiliary
function fitting the signature of HP-UX 10 library combined
initializer/finalizer functions.

* config/lib.in (hpux10.exports): New target, constructed similar to
osf1.exports but with HP-UX 10.x linker options, no initializers, and "errno"
explicitly added to the export list.
* shlib.conf (*-*-hpux*): Combine PICFLAGS setting with SHLIB_EXPFLAGS and
LDCOMBINE setting.  Add linker option "-c hpux10.exports" to LDCOMBINE.  Set
SHLIB_EXPORT_FILE_DEP to hpux10.exports.  Set use_linker_fini_option.

ticket: new

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@17153 dc483132-0cff-0310-8789-dd5450dbe970

1 files changed, 22 insertions, 7 deletions

diff --git a/src/config/shlib.conf b/src/config/shlib.conf
index 4d09e84e4..3261b672c 100644
--- a/src/config/shlib.conf
+++ b/src/config/shlib.conf
@@ -75,27 +75,42 @@ alpha*-dec-osf*)
 # on the commandline of the linker will determine which path
 # (compiled-in or SHLIB_PATH) will be searched first.
 #
+# +I initproc routine gets called at load and unload time for
+#    shl_load calls, but appears to never be called for link-time
+#    specified libraries.
+# +e sym exports symbol and supposedly prevents other symbols
+#    from being exported, according to the man page, but the
+#    latter bit doesn't actually seem to work
+# -O +dpv should display any routines eliminated as unused, but -b
+#	  apparently turns that off
 *-*-hpux*)
-	if test "$krb5_cv_prog_gcc" = yes; then
-		PICFLAGS=-fPIC
-	else
-		PICFLAGS=+z
-	fi
 	INSTALL_SHLIB='$(INSTALL)'
 	SHLIBEXT=.sl
 	SHLIBVEXT='.$(LIBMAJOR).$(LIBMINOR)'
 	SHLIBSEXT='.$(LIBMAJOR)'
 	RPATH_FLAG='-Wl,+b,'
 	if test "$krb5_cv_prog_gcc" = yes; then
+		PICFLAGS=-fPIC
 		SHLIB_EXPFLAGS='-Wl,+s -Wl,+b,$(SHLIB_RDIRS) $(SHLIB_DIRS) $(SHLIB_EXPLIBS)'
-		LDCOMBINE='gcc -fPIC -shared -Wl,+h,lib$(LIBBASE)$(SHLIBSEXT)'
+		LDCOMBINE='gcc -fPIC -shared -Wl,+h,lib$(LIBBASE)$(SHLIBSEXT) -Wl,-c,hpux10.exports'
 	else
+		PICFLAGS=+z
 		SHLIB_EXPFLAGS='+s +b $(SHLIB_RDIRS) $(SHLIB_DIRS) $(SHLIB_EXPLIBS)'
-		LDCOMBINE='ld -b +h lib$(LIBBASE)$(SHLIBSEXT)'
+		LDCOMBINE='ld -b +h lib$(LIBBASE)$(SHLIBSEXT) -c hpux10.exports'
 	fi
 	CC_LINK_SHARED='$(CC) $(PROG_LIBPATH) -Wl,+s $(RPATH_FLAG)$(PROG_RPATH) $(CFLAGS) $(LDFLAGS)'
 	CC_LINK_STATIC='$(CC) $(PROG_LIBPATH) $(CFLAGS) $(LDFLAGS)'
 	RUN_ENV='SHLIB_PATH=`echo $(PROG_LIBPATH) | sed -e "s/-L//g" -e "s/ /:/g"`; export SHLIB_PATH;'
+	SHLIB_EXPORT_FILE_DEP=hpux10.exports
+	# Do *not* set use_linker_init_option=yes here, because in the
+	# case where the library is specified at program link time, the
+	# initialization function appears not to get called, only for
+	# shl_load.  But for finalization functions, the shl_load case
+	# is the one we care about.
+	#
+	# Not setting use_linker_init_option here should cause compilation
+	# failures if the user tries to disable delayed initialization.
+	use_linker_fini_option=yes
 	;;
 
 mips-sgi-irix6.3)	# This is a Kludge; see below