1# hints/linux.sh 2# Original version by rsanders 3# Additional support by Kenneth Albanowski <kjahds@kjahds.com> 4# 5# ELF support by H.J. Lu <hjl@nynexst.com> 6# Additional info from Nigel Head <nhead@ESOC.bitnet> 7# and Kenneth Albanowski <kjahds@kjahds.com> 8# 9# Consolidated by Andy Dougherty <doughera@lafayette.edu> 10# 11# Updated Thu Feb 8 11:56:10 EST 1996 12 13# Updated Thu May 30 10:50:22 EDT 1996 by <doughera@lafayette.edu> 14 15# Updated Fri Jun 21 11:07:54 EDT 1996 16# NDBM support for ELF renabled by <kjahds@kjahds.com> 17 18# No version of Linux supports setuid scripts. 19d_suidsafe='undef' 20 21# Debian and Red Hat, and perhaps other vendors, provide both runtime and 22# development packages for some libraries. The runtime packages contain shared 23# libraries with version information in their names (e.g., libgdbm.so.1.7.3); 24# the development packages supplement this with versionless shared libraries 25# (e.g., libgdbm.so). 26# 27# If you want to link against such a library, you must install the development 28# version of the package. 29# 30# These packages use a -dev naming convention in both Debian and Red Hat: 31# libgdbmg1 (non-development version of GNU libc 2-linked GDBM library) 32# libgdbmg1-dev (development version of GNU libc 2-linked GDBM library) 33# So make sure that for any libraries you wish to link Perl with under 34# Debian or Red Hat you have the -dev packages installed. 35# 36# Some operating systems (e.g., Solaris 2.6) will link to a versioned shared 37# library implicitly. For example, on Solaris, `ld foo.o -lgdbm' will find an 38# appropriate version of libgdbm, if one is available; Linux, however, doesn't 39# do the implicit mapping. 40ignore_versioned_solibs='y' 41 42# BSD compatability library no longer needed 43# 'kaffe' has a /usr/lib/libnet.so which is not at all relevent for perl. 44set `echo X "$libswanted "| sed -e 's/ bsd / /' -e 's/ net / /'` 45shift 46libswanted="$*" 47 48# If you have glibc, then report the version for ./myconfig bug reporting. 49# (Configure doesn't need to know the specific version since it just uses 50# gcc to load the library for all tests.) 51# We don't use __GLIBC__ and __GLIBC_MINOR__ because they 52# are insufficiently precise to distinguish things like 53# libc-2.0.6 and libc-2.0.7. 54if test -L /lib/libc.so.6; then 55 libc=`ls -l /lib/libc.so.6 | awk '{print $NF}'` 56 libc=/lib/$libc 57fi 58 59# Configure may fail to find lstat() since it's a static/inline 60# function in <sys/stat.h>. 61d_lstat=define 62 63# The system malloc() is about as fast and as frugal as perl's. 64# Since the system malloc() has been the default since at least 65# 5.001, we might as well leave it that way. --AD 10 Jan 2002 66case "$usemymalloc" in 67'') usemymalloc='n' ;; 68esac 69 70case "$optimize" in 71'') # If we have modern enough gcc and well-supported enough CPU, 72 # crank up the optimization level. 73 case "`${cc:-gcc} -v 2>&1`" in 74 *"gcc version 2.95"*|*"gcc version 3."*) 75 case "`arch 2>&1`" in 76 i?86|ppc) optimize='-O3' ;; 77 esac 78 ;; 79 esac 80 case "$optimize" in 81 '') optimize='-O2' ;; 82 esac 83 ;; 84esac 85 86# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com> 87# for this test. 88cat >try.c <<'EOM' 89/* Test for whether ELF binaries are produced */ 90#include <fcntl.h> 91#include <stdlib.h> 92main() { 93 char buffer[4]; 94 int i=open("a.out",O_RDONLY); 95 if(i==-1) 96 exit(1); /* fail */ 97 if(read(i,&buffer[0],4)<4) 98 exit(1); /* fail */ 99 if(buffer[0] != 127 || buffer[1] != 'E' || 100 buffer[2] != 'L' || buffer[3] != 'F') 101 exit(1); /* fail */ 102 exit(0); /* succeed (yes, it's ELF) */ 103} 104EOM 105if ${cc:-gcc} try.c >/dev/null 2>&1 && $run ./a.out; then 106 cat <<'EOM' >&4 107 108You appear to have ELF support. I'll try to use it for dynamic loading. 109If dynamic loading doesn't work, read hints/linux.sh for further information. 110EOM 111 112else 113 cat <<'EOM' >&4 114 115You don't have an ELF gcc. I will use dld if possible. If you are 116using a version of DLD earlier than 3.2.6, or don't have it at all, you 117should probably upgrade. If you are forced to use 3.2.4, you should 118uncomment a couple of lines in hints/linux.sh and restart Configure so 119that shared libraries will be disallowed. 120 121EOM 122 lddlflags="-r $lddlflags" 123 # These empty values are so that Configure doesn't put in the 124 # Linux ELF values. 125 ccdlflags=' ' 126 cccdlflags=' ' 127 ccflags="-DOVR_DBL_DIG=14 $ccflags" 128 so='sa' 129 dlext='o' 130 nm_so_opt=' ' 131 ## If you are using DLD 3.2.4 which does not support shared libs, 132 ## uncomment the next two lines: 133 #ldflags="-static" 134 #so='none' 135 136 # In addition, on some systems there is a problem with perl and NDBM 137 # which causes AnyDBM and NDBM_File to lock up. This is evidenced 138 # in the tests as AnyDBM just freezing. Apparently, this only 139 # happens on a.out systems, so we disable NDBM for all a.out linux 140 # systems. If someone can suggest a more robust test 141 # that would be appreciated. 142 # 143 # More info: 144 # Date: Wed, 7 Feb 1996 03:21:04 +0900 145 # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp> 146 # 147 # I tried compiling with DBM support and sure enough things locked up 148 # just as advertised. Checking into it, I found that the lockup was 149 # during the call to dbm_open. Not *in* dbm_open -- but between the call 150 # to and the jump into. 151 # 152 # To make a long story short, making sure that the *.a and *.sa pairs of 153 # /usr/lib/lib{m,db,gdbm}.{a,sa} 154 # were perfectly in sync took care of it. 155 # 156 # This will generate a harmless Whoa There! message 157 case "$d_dbm_open" in 158 '') cat <<'EOM' >&4 159 160Disabling ndbm. This will generate a Whoa There message in Configure. 161Read hints/linux.sh for further information. 162EOM 163 # You can override this with Configure -Dd_dbm_open 164 d_dbm_open=undef 165 ;; 166 esac 167fi 168 169rm -f try.c a.out 170 171if /bin/sh -c exit; then 172 echo '' 173 echo 'You appear to have a working bash. Good.' 174else 175 cat << 'EOM' >&4 176 177*********************** Warning! ********************* 178It would appear you have a defective bash shell installed. This is likely to 179give you a failure of op/exec test #5 during the test phase of the build, 180Upgrading to a recent version (1.14.4 or later) should fix the problem. 181****************************************************** 182EOM 183 184fi 185 186# On SPARClinux, 187# The following csh consistently coredumped in the test directory 188# "/home/mikedlr/perl5.003_94/t", though not most other directories. 189 190#Name : csh Distribution: Red Hat Linux (Rembrandt) 191#Version : 5.2.6 Vendor: Red Hat Software 192#Release : 3 Build Date: Fri May 24 19:42:14 1996 193#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com 194#Group : Shells Source RPM: csh-5.2.6-3.src.rpm 195#Size : 184417 196#Description : BSD c-shell 197 198# For this reason I suggest using the much bug-fixed tcsh for globbing 199# where available. 200 201# November 2001: That warning's pretty old now and probably not so 202# relevant, especially since perl now uses File::Glob for globbing. 203# We'll still look for tcsh, but tone down the warnings. 204# Andy Dougherty, Nov. 6, 2001 205if $csh -c 'echo $version' >/dev/null 2>&1; then 206 echo 'Your csh is really tcsh. Good.' 207else 208 if xxx=`./UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then 209 echo "Found tcsh. I'll use it for globbing." 210 # We can't change Configure's setting of $csh, due to the way 211 # Configure handles $d_portable and commands found in $loclist. 212 # We can set the value for CSH in config.h by setting full_csh. 213 full_csh=$xxx 214 elif [ -f "$csh" ]; then 215 echo "Couldn't find tcsh. Csh-based globbing might be broken." 216 fi 217fi 218 219# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu> 220# Message-Id: <33EF1634.B36B6500@pobox.com> 221# 222# The DR2 of MkLinux (osname=linux,archname=ppc-linux) may need 223# special flags passed in order for dynamic loading to work. 224# instead of the recommended: 225# 226# ccdlflags='-rdynamic' 227# 228# it should be: 229# ccdlflags='-Wl,-E' 230# 231# So if your DR2 (DR3 came out summer 1998, consider upgrading) 232# has problems with dynamic loading, uncomment the 233# following three lines, make distclean, and re-Configure: 234#case "`uname -r | sed 's/^[0-9.-]*//'``arch`" in 235#'osfmach3ppc') ccdlflags='-Wl,-E' ;; 236#esac 237 238case "`uname -r`" in 239sparc-linux) 240 case "$cccdlflags" in 241 *-fpic*) cccdlflags="`echo $cccdlflags|sed 's/-fpic/-fPIC/'`" ;; 242 *) cccdlflags="$cccdlflags -fPIC" ;; 243 esac 244 ;; 245esac 246 247# This script UU/usethreads.cbu will get 'called-back' by Configure 248# after it has prompted the user for whether to use threads. 249cat > UU/usethreads.cbu <<'EOCBU' 250case "$usethreads" in 251$define|true|[yY]*) 252 ccflags="-D_REENTRANT -D_GNU_SOURCE $ccflags" 253 set `echo X "$libswanted "| sed -e 's/ c / pthread c /'` 254 shift 255 libswanted="$*" 256 257 # Somehow at least in Debian 2.2 these manage to escape 258 # the #define forest of <features.h> and <time.h> so that 259 # the hasproto macro of Configure doesn't see these protos, 260 # even with the -D_GNU_SOURCE. 261 262 d_asctime_r_proto="$define" 263 d_crypt_r_proto="$define" 264 d_ctime_r_proto="$define" 265 d_gmtime_r_proto="$define" 266 d_localtime_r_proto="$define" 267 d_random_r_proto="$define" 268 269 ;; 270esac 271EOCBU 272 273cat > UU/uselargefiles.cbu <<'EOCBU' 274# This script UU/uselargefiles.cbu will get 'called-back' by Configure 275# after it has prompted the user for whether to use large files. 276case "$uselargefiles" in 277''|$define|true|[yY]*) 278# Keep this in the left margin. 279ccflags_uselargefiles="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" 280 281 ccflags="$ccflags $ccflags_uselargefiles" 282 ;; 283esac 284EOCBU 285