# hints/dec_osf.sh
-#
-# How to make a DEBUGGING VERSION of perl for DECs cc compiler
-#
-# If you want to debug perl or want to send a
+# * If you want to debug perl or want to send a
# stack trace for inclusion into an bug report, call
# Configure with the additional argument -Doptimize=-g2
# or uncomment this assignment to "optimize":
# If you want both to optimise and debug with the DEC cc
# you must have -g3, e.g. "-O4 -g3", and (re)run Configure.
#
-# Note 1: gcc can always have both -g and optimisation on.
+# * gcc can always have both -g and optimisation on.
#
-# Note 2: debugging optimised code, no matter what compiler
+# * debugging optimised code, no matter what compiler
# one is using, can be surprising and confusing because of
# the optimisation tricks like code motion, code removal,
# loop unrolling, and inlining. The source code and the
# executable code simply do not agree any more while in
# mid-execution, the optimiser only cares about the results.
#
-# Note 3: Configure will automatically add the often quoted
+# * Configure will automatically add the often quoted
# -DDEBUGGING for you if the -g is specified.
#
-# Note 4: There is even more optimisation available in the new
+# * There is even more optimisation available in the new
# (GEM) DEC cc: -O5 and -fast. "man cc" will tell more about them.
# The jury is still out whether either or neither help for Perl
# and how much. Based on very quick testing, -fast boosts
# hand searching things (index, m//, s///), seems to get slower.
# Your mileage will vary.
#
-# Note 5: The -std is needed because the following compiled
+# * The -std is needed because the following compiled
# without the -std and linked with -lm
#
# #include <math.h>
# UNIX 4.0{,a} dump core: Floating point exception in the printf(),
# the y has become a signaling NaN.
#
+# * Compilation warnings like:
+#
+# "Undefined the ANSI standard macro ..."
+#
+# can be ignored, at least while compiling the POSIX extension
+# and especially if using the sfio (the latter is not a standard
+# part of Perl, never mind if it says little to you).
+#
# If using the DEC compiler we must find out the DEC compiler style:
# the style changed between Digital UNIX (aka DEC OSF/1) 3 and
# and it is called GEM. Many of the options we are going to use depend
# on the compiler style.
-# do NOT, I repeat, *NOT* take away that leading tab
+# do NOT, I repeat, *NOT* take away those leading tabs
+ # reset
+ _DEC_uname_r=
_DEC_cc_style=
+ # set
+ _DEC_uname_r=`uname -r`
+ # _DEC_cc_style set soon below
# Configure Black Magic (TM)
case "$cc" in
;;
esac
+# be nauseatingly ANSI
+case "$cc" in
+gcc) ccflags="$ccflags -ansi"
+ ;;
+*) ccflags="$ccflags -std"
+ ;;
+esac
+
+# for gcc the Configure knows about the -fpic:
+# position-independent code for dynamic loading
+
# we want optimisation
case "$optimize" in
new) optimize='-O4' ;;
old) optimize='-O2 -Olimit 3200' ;;
esac
+ ccflags="$ccflags -D_INTRINSICS"
;;
esac
;;
esac
-# all compilers are ANSI
-ccflags="$ccflags -DSTANDARD_C"
-
-# be nauseatingly ANSI
-case "$cc" in
-gcc) ccflags="$ccflags -ansi"
- ;;
-*) ccflags="$ccflags -std"
- ;;
-esac
-
# dlopen() is in libc
libswanted="`echo $libswanted | sed -e 's/ dl / /'`"
-# PW contains nothing useful for perl
+# libPW contains nothing useful for perl
libswanted="`echo $libswanted | sed -e 's/ PW / /'`"
-# bsd contains nothing used by perl that is not already in libc
+# libbsd contains nothing used by perl that is not already in libc
libswanted="`echo $libswanted | sed -e 's/ bsd / /'`"
-# c need not be separately listed
+# libc need not be separately listed
libswanted="`echo $libswanted | sed -e 's/ c / /'`"
-# dbm is already in libc (as is ndbm)
-libswanted="`echo $libswanted | sed -e 's/ dbm / /'`"
+# ndbm is already in libc
+libswanted="`echo $libswanted | sed -e 's/ ndbm / /'`"
# the basic lddlflags used always
lddlflags='-shared -expect_unresolved "*"'
-# Check if it's a CMW version of OSF1,
-# if so, do not hide the symbols.
-test `uname -s` = "MLS+" || lddlflags="$lddlflags -hidden"
+# Fancy compiler suites use optimising linker as well as compiler.
+# <spider@Orb.Nashua.NH.US>
+case "$_DEC_uname_r" in
+*[123].*) # old loader
+ lddlflags="$lddlflags -O3"
+ ;;
+*) lddlflags="$lddlflags $optimize -msym"
+ # -msym: If using a sufficiently recent /sbin/loader,
+ # keep the module symbols with the modules.
+ ;;
+esac
+# Yes, the above loses if gcc does not use the system linker.
+# If that happens, let me know about it. <jhi@iki.fi>
+
-# If debugging (-g) do not strip the objects, otherwise, strip.
+# If debugging or (old systems and doing shared)
+# then do not strip the lib, otherwise, strip.
+# As noted above the -DDEBUGGING is added automagically by Configure if -g.
case "$optimize" in
*-g*) ;; # left intentionally blank
+*) case "$_DEC_uname_r" in
+ *[123].*)
+ case "$useshrplib" in
+ false|undef|'') lddlflags="$lddlflags -s" ;;
+ esac
+ ;;
*) lddlflags="$lddlflags -s"
+ ;;
+ esac
+ ;;
esac
#
#
unset _DEC_cc_style
+unset _DEC_uname_r
#
# History:
#
+# perl5.003_28:
+#
+# 22-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
+#
+# * Restructuring Spider's suggestions.
+#
+# * Older Digital UNIXes cannot handle -Olimit ... for $lddlflags.
+#
+# * ld -s cannot be used in older Digital UNIXes when doing shared.
+#
+#
+# 21-Feb-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
+#
+# * -hidden removed.
+#
+# * -DSTANDARD_C removed.
+#
+# * -D_INTRINSICS added. (that -fast does not seem to buy much confirmed)
+#
+# * odbm not in libc, only ndbm. Therefore dbm back to $libswanted.
+#
+# * -msym for the newer runtime loaders.
+#
+# * $optimize also in $lddflags.
+#
+#
# perl5.003_27:
#
# 18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
projects / p5sagit/p5-mst-13.2.git / commitdiff