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 re-enabled by <kjahds@kjahds.com> 17 18# No version of Linux supports setuid scripts. 19d_suidsafe='undef' 20 21# No version of Linux needs libutil for perl. 22i_libutil='undef' 23 24# Debian and Red Hat, and perhaps other vendors, provide both runtime and 25# development packages for some libraries. The runtime packages contain shared 26# libraries with version information in their names (e.g., libgdbm.so.1.7.3); 27# the development packages supplement this with versionless shared libraries 28# (e.g., libgdbm.so). 29# 30# If you want to link against such a library, you must install the development 31# version of the package. 32# 33# These packages use a -dev naming convention in both Debian and Red Hat: 34# libgdbmg1 (non-development version of GNU libc 2-linked GDBM library) 35# libgdbmg1-dev (development version of GNU libc 2-linked GDBM library) 36# So make sure that for any libraries you wish to link Perl with under 37# Debian or Red Hat you have the -dev packages installed. 38 39# SuSE Linux can be used as cross-compilation host for Cray XT4 Catamount/Qk. 40if test -d /opt/xt-pe 41then 42 case "`cc -V 2>&1`" in 43 *catamount*) . hints/catamount.sh; return ;; 44 esac 45fi 46 47# Some operating systems (e.g., Solaris 2.6) will link to a versioned shared 48# library implicitly. For example, on Solaris, `ld foo.o -lgdbm' will find an 49# appropriate version of libgdbm, if one is available; Linux, however, doesn't 50# do the implicit mapping. 51ignore_versioned_solibs='y' 52 53# BSD compatibility library no longer needed 54# 'kaffe' has a /usr/lib/libnet.so which is not at all relevant for perl. 55# bind causes issues with several reentrant functions 56set `echo X "$libswanted "| sed -e 's/ bsd / /' -e 's/ net / /' -e 's/ bind / /'` 57shift 58libswanted="$*" 59 60# Debian 4.0 puts ndbm in the -lgdbm_compat library. 61libswanted="$libswanted gdbm_compat" 62 63# If you have glibc, then report the version for ./myconfig bug reporting. 64# (Configure doesn't need to know the specific version since it just uses 65# gcc to load the library for all tests.) 66# We don't use __GLIBC__ and __GLIBC_MINOR__ because they 67# are insufficiently precise to distinguish things like 68# libc-2.0.6 and libc-2.0.7. 69if test -L /lib/libc.so.6; then 70 libc=`ls -l /lib/libc.so.6 | awk '{print $NF}'` 71 libc=/lib/$libc 72fi 73 74# Configure may fail to find lstat() since it's a static/inline 75# function in <sys/stat.h>. 76d_lstat=define 77 78# malloc wrap works 79case "$usemallocwrap" in 80'') usemallocwrap='define' ;; 81esac 82 83# The system malloc() is about as fast and as frugal as perl's. 84# Since the system malloc() has been the default since at least 85# 5.001, we might as well leave it that way. --AD 10 Jan 2002 86case "$usemymalloc" in 87'') usemymalloc='n' ;; 88esac 89 90# Check if we're about to use Intel's ICC compiler 91case "`${cc:-cc} -V 2>&1`" in 92*"Intel(R) C++ Compiler"*|*"Intel(R) C Compiler"*) 93 # record the version, formats: 94 # icc (ICC) 10.1 20080801 95 # icpc (ICC) 10.1 20080801 96 # followed by a copyright on the second line 97 ccversion=`${cc:-cc} --version | sed -n -e 's/^icp\?c \((ICC) \)\?//p'` 98 # This is needed for Configure's prototype checks to work correctly 99 # The -mp flag is needed to pass various floating point related tests 100 # The -no-gcc flag is needed otherwise, icc pretends (poorly) to be gcc 101 ccflags="-we147 -mp -no-gcc $ccflags" 102 # Prevent relocation errors on 64bits arch 103 case "`uname -m`" in 104 *ia64*|*x86_64*) 105 cccdlflags='-fPIC' 106 ;; 107 esac 108 # If we're using ICC, we usually want the best performance 109 case "$optimize" in 110 '') optimize='-O3' ;; 111 esac 112 ;; 113*" Sun "*"C"*) 114 # Sun's C compiler, which might have a 'tag' name between 115 # 'Sun' and the 'C': Examples: 116 # cc: Sun C 5.9 Linux_i386 Patch 124871-01 2007/07/31 117 # cc: Sun Ceres C 5.10 Linux_i386 2008/07/10 118 test "$optimize" || optimize='-xO2' 119 cccdlflags='-KPIC' 120 lddlflags='-G -Bdynamic' 121 # Sun C doesn't support gcc attributes, but, in many cases, doesn't 122 # complain either. Not all cases, though. 123 d_attribute_format='undef' 124 d_attribute_malloc='undef' 125 d_attribute_nonnull='undef' 126 d_attribute_noreturn='undef' 127 d_attribute_pure='undef' 128 d_attribute_unused='undef' 129 d_attribute_warn_unused_result='undef' 130 ;; 131esac 132 133case "$optimize" in 134# use -O2 by default ; -O3 doesn't seem to bring significant benefits with gcc 135'') 136 optimize='-O2' 137 case "`uname -m`" in 138 ppc*) 139 # on ppc, it seems that gcc (at least gcc 3.3.2) isn't happy 140 # with -O2 ; so downgrade to -O1. 141 optimize='-O1' 142 ;; 143 ia64*) 144 # This architecture has had various problems with gcc's 145 # in the 3.2, 3.3, and 3.4 releases when optimized to -O2. See 146 # RT #37156 for a discussion of the problem. 147 case "`${cc:-gcc} -v 2>&1`" in 148 *"version 3.2"*|*"version 3.3"*|*"version 3.4"*) 149 ccflags="-fno-delete-null-pointer-checks $ccflags" 150 ;; 151 esac 152 ;; 153 esac 154 ;; 155esac 156 157# Ubuntu 11.04 (and later, presumably) doesn't keep most libraries 158# (such as -lm) in /lib or /usr/lib. So we have to ask gcc to tell us 159# where to look. We don't want gcc's own libraries, however, so we 160# filter those out. 161# This could be conditional on Unbuntu, but other distributions may 162# follow suit, and this scheme seems to work even on rather old gcc's. 163# This unconditionally uses gcc because even if the user is using another 164# compiler, we still need to find the math library and friends, and I don't 165# know how other compilers will cope with that situation. 166# Morever, if the user has their own gcc earlier in $PATH than the system gcc, 167# we don't want its libraries. So we try to prefer the system gcc 168# Still, as an escape hatch, allow Configure command line overrides to 169# plibpth to bypass this check. 170if [ -x /usr/bin/gcc ] ; then 171 gcc=/usr/bin/gcc 172else 173 gcc=gcc 174fi 175 176case "$plibpth" in 177'') plibpth=`LANG=C LC_ALL=C $gcc -print-search-dirs | grep libraries | 178 cut -f2- -d= | tr ':' $trnl | grep -v 'gcc' | sed -e 's:/$::'` 179 set X $plibpth # Collapse all entries on one line 180 shift 181 plibpth="$*" 182 ;; 183esac 184 185# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com> 186# for this test. 187cat >try.c <<'EOM' 188/* Test for whether ELF binaries are produced */ 189#include <fcntl.h> 190#include <stdlib.h> 191#include <unistd.h> 192main() { 193 char buffer[4]; 194 int i=open("a.out",O_RDONLY); 195 if(i==-1) 196 exit(1); /* fail */ 197 if(read(i,&buffer[0],4)<4) 198 exit(1); /* fail */ 199 if(buffer[0] != 127 || buffer[1] != 'E' || 200 buffer[2] != 'L' || buffer[3] != 'F') 201 exit(1); /* fail */ 202 exit(0); /* succeed (yes, it's ELF) */ 203} 204EOM 205if ${cc:-gcc} try.c >/dev/null 2>&1 && $run ./a.out; then 206 cat <<'EOM' >&4 207 208You appear to have ELF support. I'll try to use it for dynamic loading. 209If dynamic loading doesn't work, read hints/linux.sh for further information. 210EOM 211 212else 213 cat <<'EOM' >&4 214 215You don't have an ELF gcc. I will use dld if possible. If you are 216using a version of DLD earlier than 3.2.6, or don't have it at all, you 217should probably upgrade. If you are forced to use 3.2.4, you should 218uncomment a couple of lines in hints/linux.sh and restart Configure so 219that shared libraries will be disallowed. 220 221EOM 222 lddlflags="-r $lddlflags" 223 # These empty values are so that Configure doesn't put in the 224 # Linux ELF values. 225 ccdlflags=' ' 226 cccdlflags=' ' 227 ccflags="-DOVR_DBL_DIG=14 $ccflags" 228 so='sa' 229 dlext='o' 230 nm_so_opt=' ' 231 ## If you are using DLD 3.2.4 which does not support shared libs, 232 ## uncomment the next two lines: 233 #ldflags="-static" 234 #so='none' 235 236 # In addition, on some systems there is a problem with perl and NDBM 237 # which causes AnyDBM and NDBM_File to lock up. This is evidenced 238 # in the tests as AnyDBM just freezing. Apparently, this only 239 # happens on a.out systems, so we disable NDBM for all a.out linux 240 # systems. If someone can suggest a more robust test 241 # that would be appreciated. 242 # 243 # More info: 244 # Date: Wed, 7 Feb 1996 03:21:04 +0900 245 # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp> 246 # 247 # I tried compiling with DBM support and sure enough things locked up 248 # just as advertised. Checking into it, I found that the lockup was 249 # during the call to dbm_open. Not *in* dbm_open -- but between the call 250 # to and the jump into. 251 # 252 # To make a long story short, making sure that the *.a and *.sa pairs of 253 # /usr/lib/lib{m,db,gdbm}.{a,sa} 254 # were perfectly in sync took care of it. 255 # 256 # This will generate a harmless Whoa There! message 257 case "$d_dbm_open" in 258 '') cat <<'EOM' >&4 259 260Disabling ndbm. This will generate a Whoa There message in Configure. 261Read hints/linux.sh for further information. 262EOM 263 # You can override this with Configure -Dd_dbm_open 264 d_dbm_open=undef 265 ;; 266 esac 267fi 268 269rm -f try.c a.out 270 271if /bin/sh -c exit; then 272 echo '' 273 echo 'You appear to have a working bash. Good.' 274else 275 cat << 'EOM' >&4 276 277*********************** Warning! ********************* 278It would appear you have a defective bash shell installed. This is likely to 279give you a failure of op/exec test #5 during the test phase of the build, 280Upgrading to a recent version (1.14.4 or later) should fix the problem. 281****************************************************** 282EOM 283 284fi 285 286# On SPARClinux, 287# The following csh consistently coredumped in the test directory 288# "/home/mikedlr/perl5.003_94/t", though not most other directories. 289 290#Name : csh Distribution: Red Hat Linux (Rembrandt) 291#Version : 5.2.6 Vendor: Red Hat Software 292#Release : 3 Build Date: Fri May 24 19:42:14 1996 293#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com 294#Group : Shells Source RPM: csh-5.2.6-3.src.rpm 295#Size : 184417 296#Description : BSD c-shell 297 298# For this reason I suggest using the much bug-fixed tcsh for globbing 299# where available. 300 301# November 2001: That warning's pretty old now and probably not so 302# relevant, especially since perl now uses File::Glob for globbing. 303# We'll still look for tcsh, but tone down the warnings. 304# Andy Dougherty, Nov. 6, 2001 305if $csh -c 'echo $version' >/dev/null 2>&1; then 306 echo 'Your csh is really tcsh. Good.' 307else 308 if xxx=`./UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then 309 echo "Found tcsh. I'll use it for globbing." 310 # We can't change Configure's setting of $csh, due to the way 311 # Configure handles $d_portable and commands found in $loclist. 312 # We can set the value for CSH in config.h by setting full_csh. 313 full_csh=$xxx 314 elif [ -f "$csh" ]; then 315 echo "Couldn't find tcsh. Csh-based globbing might be broken." 316 fi 317fi 318 319# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu> 320# Message-Id: <33EF1634.B36B6500@pobox.com> 321# 322# The DR2 of MkLinux (osname=linux,archname=ppc-linux) may need 323# special flags passed in order for dynamic loading to work. 324# instead of the recommended: 325# 326# ccdlflags='-rdynamic' 327# 328# it should be: 329# ccdlflags='-Wl,-E' 330# 331# So if your DR2 (DR3 came out summer 1998, consider upgrading) 332# has problems with dynamic loading, uncomment the 333# following three lines, make distclean, and re-Configure: 334#case "`uname -r | sed 's/^[0-9.-]*//'``arch`" in 335#'osfmach3ppc') ccdlflags='-Wl,-E' ;; 336#esac 337 338case "`uname -m`" in 339sparc*) 340 case "$cccdlflags" in 341 *-fpic*) cccdlflags="`echo $cccdlflags|sed 's/-fpic/-fPIC/'`" ;; 342 *-fPIC*) ;; 343 *) cccdlflags="$cccdlflags -fPIC" ;; 344 esac 345 ;; 346esac 347 348# SuSE8.2 has /usr/lib/libndbm* which are ld scripts rather than 349# true libraries. The scripts cause binding against static 350# version of -lgdbm which is a bad idea. So if we have 'nm' 351# make sure it can read the file 352# NI-S 2003/08/07 353if [ -r /usr/lib/libndbm.so -a -x /usr/bin/nm ] ; then 354 if /usr/bin/nm /usr/lib/libndbm.so >/dev/null 2>&1 ; then 355 echo 'Your shared -lndbm seems to be a real library.' 356 else 357 echo 'Your shared -lndbm is not a real library.' 358 set `echo X "$libswanted "| sed -e 's/ ndbm / /'` 359 shift 360 libswanted="$*" 361 fi 362fi 363 364 365# This script UU/usethreads.cbu will get 'called-back' by Configure 366# after it has prompted the user for whether to use threads. 367cat > UU/usethreads.cbu <<'EOCBU' 368case "$usethreads" in 369$define|true|[yY]*) 370 ccflags="-D_REENTRANT -D_GNU_SOURCE $ccflags" 371 if echo $libswanted | grep -v pthread >/dev/null 372 then 373 set `echo X "$libswanted "| sed -e 's/ c / pthread c /'` 374 shift 375 libswanted="$*" 376 fi 377 378 # Somehow at least in Debian 2.2 these manage to escape 379 # the #define forest of <features.h> and <time.h> so that 380 # the hasproto macro of Configure doesn't see these protos, 381 # even with the -D_GNU_SOURCE. 382 383 d_asctime_r_proto="$define" 384 d_crypt_r_proto="$define" 385 d_ctime_r_proto="$define" 386 d_gmtime_r_proto="$define" 387 d_localtime_r_proto="$define" 388 d_random_r_proto="$define" 389 390 ;; 391esac 392EOCBU 393 394cat > UU/uselargefiles.cbu <<'EOCBU' 395# This script UU/uselargefiles.cbu will get 'called-back' by Configure 396# after it has prompted the user for whether to use large files. 397case "$uselargefiles" in 398''|$define|true|[yY]*) 399# Keep this in the left margin. 400ccflags_uselargefiles="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" 401 402 ccflags="$ccflags $ccflags_uselargefiles" 403 ;; 404esac 405EOCBU 406 407# Purify fails to link Perl if a "-lc" is passed into its linker 408# due to duplicate symbols. 409case "$PURIFY" in 410$define|true|[yY]*) 411 set `echo X "$libswanted "| sed -e 's/ c / /'` 412 shift 413 libswanted="$*" 414 ;; 415esac 416 417# If using g++, the Configure scan for dlopen() and (especially) 418# dlerror() might fail, easier just to forcibly hint them in. 419case "$cc" in 420*g++*) 421 d_dlopen='define' 422 d_dlerror='define' 423 ;; 424esac 425 426# Under some circumstances libdb can get built in such a way as to 427# need pthread explicitly linked. 428 429libdb_needs_pthread="N" 430 431if echo " $libswanted " | grep -v " pthread " >/dev/null 432then 433 if echo " $libswanted " | grep " db " >/dev/null 434 then 435 for DBDIR in $glibpth 436 do 437 DBLIB="$DBDIR/libdb.so" 438 if [ -f $DBLIB ] 439 then 440 if nm -u $DBLIB | grep pthread >/dev/null 441 then 442 if ldd $DBLIB | grep pthread >/dev/null 443 then 444 libdb_needs_pthread="N" 445 else 446 libdb_needs_pthread="Y" 447 fi 448 fi 449 fi 450 done 451 fi 452fi 453 454case "$libdb_needs_pthread" in 455 "Y") 456 libswanted="$libswanted pthread" 457 ;; 458esac 459