# hints/linux.sh
# Original version by rsanders
-# Additional dlext support by Kenneth Albanowski <kjahds@kjahds.com>
+# Additional support by Kenneth Albanowski <kjahds@kjahds.com>
#
-# First pass at ELF support by Andy Dougherty <doughera@lafcol.lafayette.edu>
-# Fri Feb 3 14:05:00 EST 1995
-# Use sh Configure -Dcc=gcc-elf to try using gcc-elf. It might work.
+# ELF support by H.J. Lu <hjl@nynexst.com>
+# Additional info from Nigel Head <nhead@ESOC.bitnet>
+# and Kenneth Albanowski <kjahds@kjahds.com>
#
+# Consolidated by Andy Dougherty <doughera@lafayette.edu>
+#
+# Updated Thu Feb 8 11:56:10 EST 1996
-ccflags='-I/usr/include/bsd'
-cppflags=' -I/usr/include/bsd'
-d_dosuid='define'
+# Updated Thu May 30 10:50:22 EDT 1996 by <doughera@lafayette.edu>
-malloctype='void *'
-usemymalloc='n'
+# Updated Fri Jun 21 11:07:54 EDT 1996
+# NDBM support for ELF renabled by <kjahds@kjahds.com>
-case "$optimize" in
-'') optimize='-O2' ;;
+# No version of Linux supports setuid scripts.
+d_suidsafe='undef'
+
+# Debian and Red Hat, and perhaps other vendors, provide both runtime and
+# development packages for some libraries. The runtime packages contain shared
+# libraries with version information in their names (e.g., libgdbm.so.1.7.3);
+# the development packages supplement this with versionless shared libraries
+# (e.g., libgdbm.so).
+#
+# If you want to link against such a library, you must install the development
+# version of the package.
+#
+# These packages use a -dev naming convention in both Debian and Red Hat:
+# libgdbmg1 (non-development version of GNU libc 2-linked GDBM library)
+# libgdbmg1-dev (development version of GNU libc 2-linked GDBM library)
+# So make sure that for any libraries you wish to link Perl with under
+# Debian or Red Hat you have the -dev packages installed.
+
+# SuSE Linux can be used as cross-compilation host for Cray XT4 Catamount/Qk.
+if test -d /opt/xt-pe
+then
+ case "`cc -V 2>&1`" in
+ *catamount*) . hints/catamount.sh; return ;;
+ esac
+fi
+
+# Some operating systems (e.g., Solaris 2.6) will link to a versioned shared
+# library implicitly. For example, on Solaris, `ld foo.o -lgdbm' will find an
+# appropriate version of libgdbm, if one is available; Linux, however, doesn't
+# do the implicit mapping.
+ignore_versioned_solibs='y'
+
+# BSD compatibility library no longer needed
+# 'kaffe' has a /usr/lib/libnet.so which is not at all relevant for perl.
+# bind causes issues with several reentrant functions
+set `echo X "$libswanted "| sed -e 's/ bsd / /' -e 's/ net / /' -e 's/ bind / /'`
+shift
+libswanted="$*"
+
+# Debian 4.0 puts ndbm in the -lgdbm_compat library.
+libswanted="$libswanted gdbm_compat"
+
+# If you have glibc, then report the version for ./myconfig bug reporting.
+# (Configure doesn't need to know the specific version since it just uses
+# gcc to load the library for all tests.)
+# We don't use __GLIBC__ and __GLIBC_MINOR__ because they
+# are insufficiently precise to distinguish things like
+# libc-2.0.6 and libc-2.0.7.
+if test -L /lib/libc.so.6; then
+ libc=`ls -l /lib/libc.so.6 | awk '{print $NF}'`
+ libc=/lib/$libc
+fi
+
+# Configure may fail to find lstat() since it's a static/inline
+# function in <sys/stat.h>.
+d_lstat=define
+
+# malloc wrap works
+case "$usemallocwrap" in
+'') usemallocwrap='define' ;;
esac
-case "$cc" in
-*cc-elf*)
- so='so'
- dlext='so'
- # Configure might not understand nm output for ELF.
- usenm=false
+# The system malloc() is about as fast and as frugal as perl's.
+# Since the system malloc() has been the default since at least
+# 5.001, we might as well leave it that way. --AD 10 Jan 2002
+case "$usemymalloc" in
+'') usemymalloc='n' ;;
+esac
+
+# Check if we're about to use Intel's ICC compiler
+case "`${cc:-cc} -V 2>&1`" in
+*"Intel(R) C++ Compiler"*|*"Intel(R) C Compiler"*)
+ # record the version, formats:
+ # icc (ICC) 10.1 20080801
+ # icpc (ICC) 10.1 20080801
+ # followed by a copyright on the second line
+ ccversion=`${cc:-cc} --version | sed -n -e 's/^icp\?c \((ICC) \)\?//p'`
+ # This is needed for Configure's prototype checks to work correctly
+ # The -mp flag is needed to pass various floating point related tests
+ # The -no-gcc flag is needed otherwise, icc pretends (poorly) to be gcc
+ ccflags="-we147 -mp -no-gcc $ccflags"
+ # Prevent relocation errors on 64bits arch
+ case "`uname -m`" in
+ *ia64*|*x86_64*)
+ cccdlflags='-fPIC'
+ ;;
+ esac
+ # If we're using ICC, we usually want the best performance
+ case "$optimize" in
+ '') optimize='-O3' ;;
+ esac
+ ;;
+*" Sun "*"C"*)
+ # Sun's C compiler, which might have a 'tag' name between
+ # 'Sun' and the 'C': Examples:
+ # cc: Sun C 5.9 Linux_i386 Patch 124871-01 2007/07/31
+ # cc: Sun Ceres C 5.10 Linux_i386 2008/07/10
+ test "$optimize" || optimize='-xO2'
+ cccdlflags='-KPIC'
+ lddlflags='-G -Bdynamic'
+ # Sun C doesn't support gcc attributes, but, in many cases, doesn't
+ # complain either. Not all cases, though.
+ d_attribute_format='undef'
+ d_attribute_malloc='undef'
+ d_attribute_nonnull='undef'
+ d_attribute_noreturn='undef'
+ d_attribute_pure='undef'
+ d_attribute_unused='undef'
+ d_attribute_warn_unused_result='undef'
;;
-*)
- lddlflags='-r'
+esac
+
+case "$optimize" in
+# use -O2 by default ; -O3 doesn't seem to bring significant benefits with gcc
+'')
+ optimize='-O2'
+ case "`uname -m`" in
+ ppc*)
+ # on ppc, it seems that gcc (at least gcc 3.3.2) isn't happy
+ # with -O2 ; so downgrade to -O1.
+ optimize='-O1'
+ ;;
+ ia64*)
+ # This architecture has had various problems with gcc's
+ # in the 3.2, 3.3, and 3.4 releases when optimized to -O2. See
+ # RT #37156 for a discussion of the problem.
+ case "`${cc:-gcc} -v 2>&1`" in
+ *"version 3.2"*|*"version 3.3"*|*"version 3.4"*)
+ ccflags="-fno-delete-null-pointer-checks $ccflags"
+ ;;
+ esac
+ ;;
+ esac
+ ;;
+esac
+
+# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com>
+# for this test.
+cat >try.c <<'EOM'
+/* Test for whether ELF binaries are produced */
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+main() {
+ char buffer[4];
+ int i=open("a.out",O_RDONLY);
+ if(i==-1)
+ exit(1); /* fail */
+ if(read(i,&buffer[0],4)<4)
+ exit(1); /* fail */
+ if(buffer[0] != 127 || buffer[1] != 'E' ||
+ buffer[2] != 'L' || buffer[3] != 'F')
+ exit(1); /* fail */
+ exit(0); /* succeed (yes, it's ELF) */
+}
+EOM
+if ${cc:-gcc} try.c >/dev/null 2>&1 && $run ./a.out; then
+ cat <<'EOM' >&4
+
+You appear to have ELF support. I'll try to use it for dynamic loading.
+If dynamic loading doesn't work, read hints/linux.sh for further information.
+EOM
+
+else
+ cat <<'EOM' >&4
+
+You don't have an ELF gcc. I will use dld if possible. If you are
+using a version of DLD earlier than 3.2.6, or don't have it at all, you
+should probably upgrade. If you are forced to use 3.2.4, you should
+uncomment a couple of lines in hints/linux.sh and restart Configure so
+that shared libraries will be disallowed.
+
+EOM
+ lddlflags="-r $lddlflags"
+ # These empty values are so that Configure doesn't put in the
+ # Linux ELF values.
+ ccdlflags=' '
+ cccdlflags=' '
+ ccflags="-DOVR_DBL_DIG=14 $ccflags"
so='sa'
dlext='o'
+ nm_so_opt=' '
## If you are using DLD 3.2.4 which does not support shared libs,
## uncomment the next two lines:
#ldflags="-static"
#so='none'
+
+ # In addition, on some systems there is a problem with perl and NDBM
+ # which causes AnyDBM and NDBM_File to lock up. This is evidenced
+ # in the tests as AnyDBM just freezing. Apparently, this only
+ # happens on a.out systems, so we disable NDBM for all a.out linux
+ # systems. If someone can suggest a more robust test
+ # that would be appreciated.
+ #
+ # More info:
+ # Date: Wed, 7 Feb 1996 03:21:04 +0900
+ # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
+ #
+ # I tried compiling with DBM support and sure enough things locked up
+ # just as advertised. Checking into it, I found that the lockup was
+ # during the call to dbm_open. Not *in* dbm_open -- but between the call
+ # to and the jump into.
+ #
+ # To make a long story short, making sure that the *.a and *.sa pairs of
+ # /usr/lib/lib{m,db,gdbm}.{a,sa}
+ # were perfectly in sync took care of it.
+ #
+ # This will generate a harmless Whoa There! message
+ case "$d_dbm_open" in
+ '') cat <<'EOM' >&4
+
+Disabling ndbm. This will generate a Whoa There message in Configure.
+Read hints/linux.sh for further information.
+EOM
+ # You can override this with Configure -Dd_dbm_open
+ d_dbm_open=undef
+ ;;
+ esac
+fi
+
+rm -f try.c a.out
+
+if /bin/sh -c exit; then
+ echo ''
+ echo 'You appear to have a working bash. Good.'
+else
+ cat << 'EOM' >&4
+
+*********************** Warning! *********************
+It would appear you have a defective bash shell installed. This is likely to
+give you a failure of op/exec test #5 during the test phase of the build,
+Upgrading to a recent version (1.14.4 or later) should fix the problem.
+******************************************************
+EOM
+
+fi
+
+# On SPARClinux,
+# The following csh consistently coredumped in the test directory
+# "/home/mikedlr/perl5.003_94/t", though not most other directories.
+
+#Name : csh Distribution: Red Hat Linux (Rembrandt)
+#Version : 5.2.6 Vendor: Red Hat Software
+#Release : 3 Build Date: Fri May 24 19:42:14 1996
+#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com
+#Group : Shells Source RPM: csh-5.2.6-3.src.rpm
+#Size : 184417
+#Description : BSD c-shell
+
+# For this reason I suggest using the much bug-fixed tcsh for globbing
+# where available.
+
+# November 2001: That warning's pretty old now and probably not so
+# relevant, especially since perl now uses File::Glob for globbing.
+# We'll still look for tcsh, but tone down the warnings.
+# Andy Dougherty, Nov. 6, 2001
+if $csh -c 'echo $version' >/dev/null 2>&1; then
+ echo 'Your csh is really tcsh. Good.'
+else
+ if xxx=`./UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then
+ echo "Found tcsh. I'll use it for globbing."
+ # We can't change Configure's setting of $csh, due to the way
+ # Configure handles $d_portable and commands found in $loclist.
+ # We can set the value for CSH in config.h by setting full_csh.
+ full_csh=$xxx
+ elif [ -f "$csh" ]; then
+ echo "Couldn't find tcsh. Csh-based globbing might be broken."
+ fi
+fi
+
+# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu>
+# Message-Id: <33EF1634.B36B6500@pobox.com>
+#
+# The DR2 of MkLinux (osname=linux,archname=ppc-linux) may need
+# special flags passed in order for dynamic loading to work.
+# instead of the recommended:
+#
+# ccdlflags='-rdynamic'
+#
+# it should be:
+# ccdlflags='-Wl,-E'
+#
+# So if your DR2 (DR3 came out summer 1998, consider upgrading)
+# has problems with dynamic loading, uncomment the
+# following three lines, make distclean, and re-Configure:
+#case "`uname -r | sed 's/^[0-9.-]*//'``arch`" in
+#'osfmach3ppc') ccdlflags='-Wl,-E' ;;
+#esac
+
+case "`uname -m`" in
+sparc*)
+ case "$cccdlflags" in
+ *-fpic*) cccdlflags="`echo $cccdlflags|sed 's/-fpic/-fPIC/'`" ;;
+ *-fPIC*) ;;
+ *) cccdlflags="$cccdlflags -fPIC" ;;
+ esac
+ ;;
+esac
+
+# SuSE8.2 has /usr/lib/libndbm* which are ld scripts rather than
+# true libraries. The scripts cause binding against static
+# version of -lgdbm which is a bad idea. So if we have 'nm'
+# make sure it can read the file
+# NI-S 2003/08/07
+if [ -r /usr/lib/libndbm.so -a -x /usr/bin/nm ] ; then
+ if /usr/bin/nm /usr/lib/libndbm.so >/dev/null 2>&1 ; then
+ echo 'Your shared -lndbm seems to be a real library.'
+ else
+ echo 'Your shared -lndbm is not a real library.'
+ set `echo X "$libswanted "| sed -e 's/ ndbm / /'`
+ shift
+ libswanted="$*"
+ fi
+fi
+
+
+# This script UU/usethreads.cbu will get 'called-back' by Configure
+# after it has prompted the user for whether to use threads.
+cat > UU/usethreads.cbu <<'EOCBU'
+if getconf GNU_LIBPTHREAD_VERSION | grep NPTL >/dev/null 2>/dev/null
+then
+ threadshavepids=""
+else
+ threadshavepids="-DTHREADS_HAVE_PIDS"
+fi
+case "$usethreads" in
+$define|true|[yY]*)
+ ccflags="-D_REENTRANT -D_GNU_SOURCE $threadshavepids $ccflags"
+ if echo $libswanted | grep -v pthread >/dev/null
+ then
+ set `echo X "$libswanted "| sed -e 's/ c / pthread c /'`
+ shift
+ libswanted="$*"
+ fi
+
+ # Somehow at least in Debian 2.2 these manage to escape
+ # the #define forest of <features.h> and <time.h> so that
+ # the hasproto macro of Configure doesn't see these protos,
+ # even with the -D_GNU_SOURCE.
+
+ d_asctime_r_proto="$define"
+ d_crypt_r_proto="$define"
+ d_ctime_r_proto="$define"
+ d_gmtime_r_proto="$define"
+ d_localtime_r_proto="$define"
+ d_random_r_proto="$define"
+
+ ;;
+esac
+EOCBU
+
+cat > UU/uselargefiles.cbu <<'EOCBU'
+# This script UU/uselargefiles.cbu will get 'called-back' by Configure
+# after it has prompted the user for whether to use large files.
+case "$uselargefiles" in
+''|$define|true|[yY]*)
+# Keep this in the left margin.
+ccflags_uselargefiles="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
+
+ ccflags="$ccflags $ccflags_uselargefiles"
+ ;;
+esac
+EOCBU
+
+# Purify fails to link Perl if a "-lc" is passed into its linker
+# due to duplicate symbols.
+case "$PURIFY" in
+$define|true|[yY]*)
+ set `echo X "$libswanted "| sed -e 's/ c / /'`
+ shift
+ libswanted="$*"
;;
esac
-cat <<EOM
+# If we are using g++ we must use nm and force ourselves to use
+# the /usr/lib/libc.a (resetting the libc below to an empty string
+# makes Configure to look for the right one) because the symbol
+# scanning tricks of Configure will crash and burn horribly.
+case "$cc" in
+*g++*) usenm=true
+ libc=''
+ ;;
+esac
-You should take a look at hints/linux.sh. There are a some lines you
-may wish to change near the bottom.
-EOM
+# If using g++, the Configure scan for dlopen() and (especially)
+# dlerror() might fail, easier just to forcibly hint them in.
+case "$cc" in
+*g++*)
+ d_dlopen='define'
+ d_dlerror='define'
+ ;;
+esac
+
+# Under some circumstances libdb can get built in such a way as to
+# need pthread explicitly linked.
+
+libdb_needs_pthread="N"
+
+if echo " $libswanted " | grep -v " pthread " >/dev/null
+then
+ if echo " $libswanted " | grep " db " >/dev/null
+ then
+ for DBDIR in $glibpth
+ do
+ DBLIB="$DBDIR/libdb.so"
+ if [ -f $DBLIB ]
+ then
+ if nm -u $DBLIB | grep pthread >/dev/null
+ then
+ if ldd $DBLIB | grep pthread >/dev/null
+ then
+ libdb_needs_pthread="N"
+ else
+ libdb_needs_pthread="Y"
+ fi
+ fi
+ fi
+ done
+ fi
+fi
+
+case "$libdb_needs_pthread" in
+ "Y")
+ libswanted="$libswanted pthread"
+ ;;
+esac
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