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?RCS: $Id: dlsrc.U,v$
?RCS:
?RCS: You may redistribute only under the terms of the Artistic Licence,
?RCS: as specified in the README file that comes with the distribution.
?RCS: You may reuse parts of this distribution only within the terms of
?RCS: that same Artistic Licence; a copy of which may be found at the root
?RCS: of the source tree for dist 3.0.
?RCS:
?RCS: $Log: dlsrc.U,v $
?RCS:
?X: hpux support thanks to Jeff Okamoto <okamoto@hpcc101.corp.hp.com>
?X:
?X: To create a shared library, you must compile ALL source files in the
?X: library with +z (or possibly +Z if the library is whopping huge),
?X: then link the library with -b. Example:
?X: cc -c +z module_a.c
?X: cc -c +z module_b.c
?X: ld -b module_a.o module_b.o -o module.sl
?X:
?MAKE:usedl dlsrc dlobj dldir cccdlflags lddlflags ccdlflags \
shlibsuffix: Getfile Myread test osname sed i_dlfcn Findhdr cc
?MAKE: -pick add $@ %<
?S:usedl:
?S: This variable contains indicates if the the system supports dynamic
?S: loading of some sort. See also dlsrc and dlobj.
?S:.
?S:dlsrc:
?S: This variable contains the name of the dynamic loading file that
?S: will be used with the package.
?S:.
?S:dlobj:
?S: This variable contains the name of the dynamic loading object
?S: file that will be used with the package. This is used in Makefile.
?S:.
?S:dldir:
?S: This variable contains the directory from which to fetch dlsrc.
?S: It is up to the makefile to use it.
?S:.
?S:cccdlflags:
?S: This variable contains any special flags that might need to be
?S: passed with cc -c to compile modules to be used to create a shared
?S: library that will be used for dynamic loading. For hpux, this
?S: should be +z. It is up to the makefile to use it.
?S:.
?S:lddlflags:
?S: This variable contains any special flags that might need to be
?S: passed to ld to create a shared library suitable for dynamic
?S: loading. It is up to the makefile to use it. For hpux, it
?S: should be -b. For sunos 4.1, it is empty.
?S:.
?S:ccdlflags:
?S: This variable contains any special flags that might need to be
?S: passed to cc to link with a shared library for dynamic loading.
?S: It is up to the makefile to use it. For sunos 4.1, it should
?S: be empty.
?S:.
?S:shlibsuffix:
?S: Shared libraries are built by Makefile in the form
?S: lib/auto/xxx/xxx${shsuffix}, where xxx is
?S: the name of the library, e.g. /lib/auto/POSIX/POSIX.so
?S:.
?C:USE_DYNAMIC_LOADING ~ %<:
?C: This symbol, if defined, indicates that dynamic loading of
?C: some sort is available.
?C:.
?H:?%<:#$usedl USE_DYNAMIC_LOADING /**/
?H:.
?W:%<:dlopen
?INIT:: File to use for dynamic loading
?INIT:usedl=''
?T:xxx
?X:
?X: We select a default of 'define' for usedl if either dl_$osname.c
?X: exists or if i_dlfcn is defined (which probably means dl_sunos.c
?X: will work.)
?X:
: determine which dynamic loading, if any, to compile in
echo " "
case "$usedl" in
'') case "$i_dlfcn" in
define) dflt='y' ;;
*) dflt='n' ;;
esac
: Does a dl.c file exist for this operating system
$test -f ../ext/dl/dl_${osname}.c && dflt='y'
;;
define|y|true) dflt='y'
usedl="$define"
;;
*) dflt='n'
;;
esac
rp="Do you wish to attempt to use dynamic loading?"
. ./myread
usedl="$ans"
case "$ans" in
y*) usedl="$define"
if $test -f ../ext/dl/dl_${osname}.c ; then
dflt="ext/dl/dl_${osname}.c"
else
dflt='ext/dl/dl.c'
fi
echo "The following dynamic loading files are available:"
cd ..; ls -C ext/dl/dl*.c; cd UU
rp="Source file to use for dynamic loading"
fn="fne~"
. ./getfile
: emulate basename and dirname
xxx=`echo $ans | $sed -e 's@.*/\([^/]*\)$@\1@' -e 's@\.c$@@'`
dlobj=$xxx.o
dlsrc=$xxx.c
dldir=`echo $ans | $sed 's@\(.*\)/[^/]*$@\1@'`
case "$dldir" in
'') dldir="." ;;
*) ;;
esac
if $test -f ../$dldir/$dlsrc; then
usedl="$define"
else
echo "File $dlsrc does not exist -- ignored"
usedl="$undef"
fi
cat << EOM
Some systems may require passing special flags to $cc -c to
compile modules that will be used to create a shared library.
To use no flags, say "none".
EOM
case "$cccdlflags" in
''|' ') case "$osname" in
hpux) dflt='+z' ;;
next) dflt='none' ;;
sunos) dflt='none' ;;
*) dflt='none' ;;
esac
;;
*) dflt="$cccdlflags" ;;
esac
rp="Any special flags to pass to $cc -c to compile shared library modules?"
. ./myread
case "$ans" in
none) cccdlflags='' ;;
*) cccdlflags="$ans" ;;
esac
cat << 'EOM'
Some systems may require passing special flags to ld to
create a shared library. To use no flags, say "none".
EOM
?X: I have received one report that NeXT requires -r here.
?X: On SunOS 4.1.3, that makes the library no longer shared.
case "$lddlflags" in
''|' ') case "$osname" in
hpux) dflt='-b' ;;
next) dflt='none' ;;
sunos) dflt='none' ;;
*) dflt='none' ;;
esac
;;
*) dflt="$lddlflags" ;;
esac
rp="Any special flags to pass to ld to create a shared library?"
. ./myread
case "$ans" in
none) lddlflags='' ;;
*) lddlflags="$ans" ;;
esac
cat <<EOM
Some systems may require passing special flags to $cc to indicate that
dynamic linking will be used. To use no flags, say "none".
EOM
case "$ccdlflags" in
''|' ')
case "$osname" in
hpux) dflt='none' ;;
next) dflt='none' ;;
sunos) dflt='none' ;;
*) dflt='none' ;;
esac
;;
*) dflt="$ccdlflags"
;;
esac
rp="Any special flags to pass to $cc to use dynamic loading?"
. ./myread
case "$ans" in
none) ccdlflags='' ;;
*) ccdlflags="$ans" ;;
esac
cat <<EOM
Some systems may require using a special suffix for shared libraries.
To create the shared library for POSIX, for example, you may need to
actually build the file POSIX.so.
EOM
case "$shlibsuffix" in
'')
case "$osname" in
hpux) dflt='.sl' ;;
next) dflt='.so' ;;
sunos) dflt='.so' ;;
*) dflt='.so' ;;
esac
;;
*) dflt="$shlibsuffix"
;;
esac
rp="What is the suffix used for shared libraries?"
. ./myread
case "$ans" in
none) shlibsuffix='' ;;
*) shlibsuffix="$ans" ;;
esac
;;
?X: End of usedl=y section
*) usedl="$undef"
: These are currently not used.
dlsrc=''
dlobj=''
dldir=''
lddlflags=''
ccdlflags=''
shlibsuffix='.o'
;;
esac
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