# hints/linux.sh
# Original version by rsanders
# Additional support by Kenneth Albanowski <kjahds@kjahds.com>
#
# 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
# Updated Thu May 30 10:50:22 EDT 1996 by <doughera@lafayette.edu>
# Updated Fri Jun 21 11:07:54 EDT 1996
# NDBM support for ELF re-enabled by <kjahds@kjahds.com>
# No version of Linux supports setuid scripts.
d_suidsafe='undef'
# No version of Linux needs libutil for perl.
i_libutil='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 "`${cc:-cc} -V 2>&1`" in
*catamount*) . hints/catamount.sh; return ;;
esac
fi
# Some operating systems (e.g., Solaris 2.6) will link to a versioned shared
# library implicitly. For example, on Solaris, `ld foo.o -lgdbm' will find an
# appropriate version of libgdbm, if one is available; Linux, however, doesn't
# do the implicit mapping.
ignore_versioned_solibs='y'
# BSD compatibility library no longer needed
# 'kaffe' has a /usr/lib/libnet.so which is not at all relevant for perl.
# bind causes issues with several reentrant functions
set `echo X "$libswanted "| sed -e 's/ bsd / /' -e 's/ net / /' -e 's/ bind / /'`
shift
libswanted="$*"
# Debian 4.0 puts ndbm in the -lgdbm_compat library.
echo $libs
if echo " $libswanted " | grep -q ' gdbm '; then
# Only add if gdbm is in libswanted.
libswanted="$libswanted gdbm_compat"
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 "$usemallocwrap" in
'') usemallocwrap='define' ;;
esac
# The system malloc() is about as fast and as frugal as perl's.
# Since the system malloc() has been the default since at least
# 5.001, we might as well leave it that way. --AD 10 Jan 2002
case "$usemymalloc" in
'') usemymalloc='n' ;;
esac
uname_minus_m="`$run uname -m 2>/dev/null`"
uname_minus_m="${uname_minus_m:-"$targetarch"}"
# Check if we're about to use Intel's ICC compiler
case "`${cc:-cc} -V 2>&1`" in
*"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_minus_m" in
*ia64*|*x86_64*)
cccdlflags='-fPIC'
;;
esac
# If we're using ICC, we usually want the best performance
case "$optimize" in
'') optimize='-O3' ;;
esac
;;
# the new Intel C/C++ compiler, LLVM based, replaces ICC which
# is no longer maintained from around October 2023
*"Intel(R) oneAPI DPC++/C++ Compiler"*)
# version from end of first line, like:
# Intel(R) oneAPI DPC++/C++ Compiler 2024.1.0 (2024.1.0.20240308)
ccversion=`${cc:-cc} --version | sed -n -e 's/^Intel.*(\(.*\))/\1/p'`
# If we're using ICX, we usually want the best performance
case "$optimize" in
'') optimize='-O3' ;;
esac
# fp-model defaults to "fast" which mis-handles NaNs
ccflags="-fp-model=precise $ccflags"
;;
*" Sun "*"C"*)
# Sun's C compiler, which might have a 'tag' name between
# 'Sun' and the 'C': Examples:
# cc: Sun C 5.9 Linux_i386 Patch 124871-01 2007/07/31
# cc: Sun Ceres C 5.10 Linux_i386 2008/07/10
# cc: Studio 12.6 Sun C 5.15 Linux_i386 2017/05/30
# GH #21535 - apparent optimization bug in workshop cc
test "$optimize" || optimize='-O1'
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'
case "$cc" in
*c99) # Without -Xa c99 errors on some Linux system headers
# in particular zero sized arrays at the end of structs
case "$ccflags" in
*-Xa*) ;;
*) ccflags="$ccflags -Xa" ;;
esac
;;
esac
;;
esac
case "$optimize" in
# use -O2 by default ; -O3 doesn't seem to bring significant benefits with gcc
'')
optimize='-O2'
case "$uname_minus_m" in
ppc*)
# on ppc, it seems that gcc (at least gcc 3.3.2) isn't happy
# with -O2 ; so downgrade to -O1.
optimize='-O1'
;;
ia64*)
# This architecture has had various problems with gcc's
# in the 3.2, 3.3, and 3.4 releases when optimized to -O2. See
# RT #37156 for a discussion of the problem.
case "`${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
# Ubuntu 11.04 (and later, presumably) doesn't keep most libraries
# (such as -lm) in /lib or /usr/lib. So we have to ask gcc to tell us
# where to look. We don't want gcc's own libraries, however, so we
# filter those out.
# This could be conditional on Ubuntu, but other distributions may
# follow suit, and this scheme seems to work even on rather old gcc's.
# This unconditionally uses gcc because even if the user is using another
# compiler, we still need to find the math library and friends, and I don't
# know how other compilers will cope with that situation.
# Morever, if the user has their own gcc earlier in $PATH than the system gcc,
# we don't want its libraries. So we try to prefer the system gcc
# Still, as an escape hatch, allow Configure command line overrides to
# plibpth to bypass this check.
if [ -x /usr/bin/gcc ] ; then
gcc=/usr/bin/gcc
# clang also provides -print-search-dirs
elif ${cc:-cc} --version 2>/dev/null | grep -q -e '^clang version' -e ' clang version'; then
gcc=${cc:-cc}
else
gcc=gcc
fi
case "$plibpth" in
'') plibpth=`LANG=C LC_ALL=C $gcc $ccflags $ldflags -print-search-dirs | grep libraries |
cut -f2- -d= | tr ':' $trnl | grep -v 'gcc' | sed -e 's:/$::'`
set X $plibpth # Collapse all entries on one line
shift
plibpth="$*"
;;
esac
# For the musl libc, perl should #define _GNU_SOURCE. Otherwise, some
# available functions, like memem, won't be used. See the discussion in
# [perl #133760]. musl doesn't offer an easy way to identify it, but,
# at least on alpine linux, the ldd --version output contains the
# string 'musl.'
case `ldd --version 2>&1` in
musl*) ccflags="$ccflags -D_GNU_SOURCE" ;;
*) ;;
esac
# libquadmath is sometimes installed as gcc internal library,
# so contrary to our usual policy of *not* looking at gcc internal
# directories we now *do* look at them, in case they contain
# the quadmath library.
# XXX This may apply to other gcc internal libraries, if such exist.
# XXX This could be at Configure level, but then the $gcc is messy.
case "$usequadmath" in
"$define")
for d in `LANG=C LC_ALL=C $gcc $ccflags $ldflags -print-search-dirs | grep libraries | cut -f2- -d= | tr ':' $trnl | grep 'gcc' | sed -e 's:/$::'`
do
case `ls $d/*libquadmath*$so* 2>/dev/null` in
$d/*libquadmath*$so*) xlibpth="$xlibpth $d" ;;
esac
done
;;
esac
case "$libc" in
'')
# 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.
for p in $plibpth
do
for trylib in libc.so.6 libc.so
do
if $test -e $p/$trylib; then
libc=`ls -l $p/$trylib | awk '{print $NF}'`
if $test "X$libc" != X; then
break
fi
fi
done
if $test "X$libc" != X; then
break
fi
done
;;
esac
if ${sh:-/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_minus_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
case "$nm" in
'') ;;
*)
for p in $plibpth
do
if $test -r $p/libndbm.so; then
if $nm $p/libndbm.so >/dev/null 2>&1 ; then
echo 'Your shared -lndbm seems to be a real library.'
_libndbm_real=1
break
fi
fi
done
if $test "X$_libndbm_real" = X; then
echo 'Your shared -lndbm is not a real library.'
set `echo X "$libswanted "| sed -e 's/ ndbm / /'`
shift
libswanted="$*"
fi
;;
esac
# Linux on Synology.
if [ -f /etc/synoinfo.conf -a -d /usr/syno ]; then
# Tested on Synology DS213 and DS413
# OS version info in /etc.defaults/VERSION
# Synology DS213 running DSM 4.3-3810-0 (2013-11-06)
# CPU model Marvell Kirkwood mv6282 ARMv5te
# Linux 2.6.32.12 #3810 Wed Nov 6 05:13:41 CST 2013 armv5tel GNU/Linux
# Synology DS413 running DSM 4.3-3810-0 (2013-11-06)
# CPU model Freescale QorIQ P1022 ppc (e500v2)
# linux 2.6.32.12 #3810 ppc GNU/Linux
# All development stuff installed with ipkg is in /opt
if [ "$LANG" = "" -o "$LANG" = "C" ]; then
echo 'Your LANG is safe'
else
echo 'Please set $LANG to "C". All other $LANG settings will cause havoc' >&4
LANG=C
fi
echo 'Setting up to use /opt/*' >&4
locincpth="/opt/include $locincpth"
libpth="/opt/lib $libpth"
libspth="/opt/lib $libspth"
loclibpth="/opt/lib $loclibpth"
# POSIX will not link without the pthread lib
libswanted="$libswanted pthread"
echo "$libswanted" >&4
fi
# This script UU/usethreads.cbu will get 'called-back' by Configure
# after it has prompted the user for whether to use threads.
cat > UU/usethreads.cbu <<'EOCBU'
case "$usethreads" in
$define|true|[yY]*)
ccflags="-D_REENTRANT -D_GNU_SOURCE $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="$*"
;;
esac
# If using g++, the Configure scan for dlopen() and (especially)
# dlerror() might fail, easier just to forcibly hint them in.
case "$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:-nm} -u $DBLIB 2>/dev/null | 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