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Avoid core dumps resulting from humongous array indices
[perl5.git] / hints / aix.sh
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1# hints/aix.sh
2# AIX 3.x.x hints thanks to Wayne Scott <wscott@ichips.intel.com>
3# AIX 4.1 hints thanks to Christopher Chan-Nui <channui@austin.ibm.com>.
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4# AIX 4.1 pthreading by Christopher Chan-Nui <channui@austin.ibm.com> and
5# Jarkko Hietaniemi <jhi@iki.fi>.
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6# Merged on Mon Feb 6 10:22:35 EST 1995 by
7# Andy Dougherty <doughera@lafcol.lafayette.edu>
8
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9#
10# Contact dfavor@corridor.com for any of the following:
11#
12# - AIX 43x and above support
13# - gcc + threads support
14# - socks support
15#
16# Apr 99 changes:
17#
18# - use nm in AIX 43x and above
19# - gcc + threads now builds
29209bc5 20# [(added support for socks) Jul 99 SOCKS support rewritten]
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21#
22# Notes:
23#
24# - shared libperl support is tricky. if ever libperl.a ends up
25# in /usr/local/lib/* it can override any subsequent builds of
26# that same perl release. to make sure you know where the shared
27# libperl.a is coming from do a 'dump -Hv perl' and check all the
28# library search paths in the loader header.
29#
30# it would be nice to warn the user if a libperl.a exists that is
31# going to override the current build, but that would be complex.
32#
33# better yet, a solid fix for this situation should be developed.
34#
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35
36# Configure finds setrgid and setruid, but they're useless. The man
37# pages state:
38# setrgid: The EPERM error code is always returned.
39# setruid: The EPERM error code is always returned. Processes cannot
40# reset only their real user IDs.
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41d_setrgid='undef'
42d_setruid='undef'
1aef975c 43
5f3774a9 44alignbytes=8
a5f75d66 45
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46case "$usemymalloc" in
47'') usemymalloc='n' ;;
48esac
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49
50# Intuiting the existence of system calls under AIX is difficult,
51# at best; the safest technique is to find them empirically.
52
53# AIX 4.3.* and above default to using nm for symbol extraction
54case "$osvers" in
55 3.*|4.1.*|4.2.*)
56 usenm='undef'
57 ;;
58 *)
59 usenm='true'
60 ;;
61esac
cc628cc3 62
3c321fdc 63so="a"
549a6b10 64dlext="o"
3c321fdc 65
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66# Trying to set this breaks the POSIX.c compilation
67
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68# Make setsockopt work correctly. See man page.
69# ccflags='-D_BSD=44'
70
71# uname -m output is too specific and not appropriate here
72case "$archname" in
73'') archname="$osname" ;;
74esac
75
76case "$osvers" in
773*) d_fchmod=undef
fc2c2f48 78 ccflags="$ccflags -D_ALL_SOURCE"
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79 ;;
80*) # These hints at least work for 4.x, possibly other systems too.
fc2c2f48 81 ccflags="$ccflags -D_ALL_SOURCE -D_ANSI_C_SOURCE -D_POSIX_SOURCE"
80589958 82 case "$cc" in
83 *gcc*) ;;
86959918 84 *) ccflags="$ccflags -qmaxmem=16384" ;;
80589958 85 esac
1aef975c 86 nm_opt='-B'
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87 ;;
88esac
89
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90# These functions don't work like Perl expects them to.
91d_setregid='undef'
92d_setreuid='undef'
93
1aef975c 94# Changes for dynamic linking by Wayne Scott <wscott@ichips.intel.com>
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95#
96# Tell perl which symbols to export for dynamic linking.
4633a7c4 97case "$cc" in
5f9d9a17 98*gcc*) ccdlflags='-Xlinker' ;;
4633a7c4 99esac
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100# the required -bE:$installarchlib/CORE/perl.exp is added by
101# libperl.U (Configure) later.
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102
103# The first 3 options would not be needed if dynamic libs. could be linked
104# with the compiler instead of ld.
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105# -bI:$(PERL_INC)/perl.exp Read the exported symbols from the perl binary
106# -bE:$(BASEEXT).exp Export these symbols. This file contains only one
107# symbol: boot_$(EXP) can it be auto-generated?
c07a80fd 108case "$osvers" in
1093*)
5b877257 110 lddlflags="$lddlflags -H512 -T512 -bhalt:4 -bM:SRE -bI:$(PERL_INC)/perl.exp -bE:$(BASEEXT).exp -e _nostart -lc"
c07a80fd 111 ;;
112*)
5b877257 113 lddlflags="$lddlflags -bhalt:4 -bM:SRE -bI:$(PERL_INC)/perl.exp -bE:$(BASEEXT).exp -b noentry -lc"
b691c02f 114 ;;
c07a80fd 115esac
52e1cb5e 116
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117# This script UU/usethreads.cbu will get 'called-back' by Configure
118# after it has prompted the user for whether to use threads.
119cat > UU/usethreads.cbu <<'EOCBU'
120case "$usethreads" in
121$define|true|[yY]*)
122 ccflags="$ccflags -DNEED_PTHREAD_INIT"
123 case "$cc" in
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124 gcc) ;;
125 cc_r) ;;
126 cc|xlc_r)
127 echo >&4 "Switching cc to cc_r because of POSIX threads."
128 # xlc_r has been known to produce buggy code in AIX 4.3.2.
129 # (e.g. pragma/overload core dumps)
130 # --jhi@iki.fi
131 cc=cc_r
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132 if test ! -e /bin/cc_r; then
133 cat >&4 <<EOM
134For pthreads you should use the AIX C compiler cc_r.
135But I cannot find it in /bin.
136Cannot continue, aborting.
137EOM
138 fi
104d25b7 139 ;;
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140 '')
141 cc=cc_r
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142 ;;
143 *)
144 cat >&4 <<EOM
bbc711f9 145For pthreads you should use the AIX C compiler cc_r.
549a6b10 146(now your compiler was set to '$cc')
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147Cannot continue, aborting.
148EOM
149 exit 1
150 ;;
151 esac
152
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153 # Add the POSIX threads library and the re-entrant libc to lddflags.
154 set `echo X "$lddlflags"| sed -e 's/ -lc$/ -lpthreads -lc_r/'`
155 shift
156 lddlflags="$*"
104d25b7 157
5b877257 158 # Add the POSIX threads library and the re-entrant libc to libswanted.
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159 # Make sure the c_r library is before the c library or
160 # make will fail.
bbc711f9 161 set `echo X "$libswanted "| sed -e 's/ c / pthreads c_r /'`
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162 shift
163 libswanted="$*"
164 ;;
165esac
166EOCBU
fa9667c9 167
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168# This script UU/use64bits.cbu will get 'called-back' by Configure
169# after it has prompted the user for whether to use 64 bits.
170cat > UU/use64bits.cbu <<'EOCBU'
171case "$use64bits" in
172$define|true|[yY]*)
173 case "`uname -r`" in
174 3.*|4.[012].*)
175 cat >&4 <<EOM
176AIX `uname -r` does not support 64-bit interfaces.
177You should upgrade to at least AIX 4.3.
178EOM
179 exit 1
180 ;;
181 esac
182 ccflags="$ccflags `getconf XBS5_LPBIG_OFFBIG_CFLAGS`"
183 ccflags="$ccflags -DUSE_LONG_LONG"
184 ldflags="$ldflags `getconf XBS5_LPBIG_OFFBIG_LDFLAGS`"
185 libswanted="$libswanted `getconf XBS5_LPBIG_OFFBIG_LIBS`"
186 # When a 64-bit cc becomes available $archname64
187 # may need setting so that $archname gets it attached.
188 ;;
189esac
190EOCBU
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191
192# EOF