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1 | If you read this file _as_is_, just ignore the funny characters you |
2 | see. It is written in the POD format (see pod/perlpod.pod) which is | |
3 | specially designed to be readable as is. | |
4 | ||
5 | =head1 NAME | |
6 | ||
d66be8f9 | 7 | README.hpux - Perl version 5 on Hewlett-Packard Unix (HP-UX) systems |
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8 | |
9 | =head1 DESCRIPTION | |
10 | ||
11 | This document describes various features of HP's Unix operating system (HP-UX) | |
12 | that will affect how Perl version 5 (hereafter just Perl) is compiled and/or | |
13 | runs. | |
14 | ||
15 | =head2 Compiling Perl 5 on HP-UX | |
16 | ||
17 | When compiling Perl, the use of an ANSI C compiler is highly recommended. | |
18 | The C compiler that ships with all HP-UX systems is a K&R compiler that | |
19 | should only be used to build new kernels. | |
20 | ||
21 | Perl can be compiled with either HP's ANSI C compiler or with gcc. The | |
22 | former is recommended, as not only can it compile Perl with no difficulty, | |
23 | but also can take advantage of features listed later that require the use | |
24 | of HP compiler-specific command-line flags. | |
25 | ||
26 | If you decide to use gcc, make sure your installation is recent and complete, | |
27 | and be sure to read the Perl README file for more gcc-specific details. | |
28 | ||
29 | =head2 PA-RISC | |
30 | ||
31 | HP's current Unix systems run on its own Precision Architecture (PA-RISC) chip. | |
32 | HP-UX used to run on the Motorola MC68000 family of chips, but any machine with | |
33 | this chip in it is quite obsolete and this document will not attempt to address | |
34 | issues for compiling Perl on the Motorola chipset. | |
35 | ||
36 | The most recent version of PA-RISC at the time of this document's last update | |
37 | is 2.0. | |
38 | ||
39 | =head2 PA-RISC 1.0 | |
40 | ||
41 | The original version of PA-RISC, HP no longer sells any system with this chip. | |
42 | ||
43 | The following systems contain PA-RISC 1.0 chips: | |
44 | ||
45 | 600, 635, 645, 800, 808, 815, 822, 825, 832, 834, 835, 840, | |
46 | 842, 845, 850, 852, 855, 860, 865, 870, 890 | |
47 | ||
48 | =head2 PA-RISC 1.1 | |
49 | ||
50 | An upgrade to the PA-RISC design, it shipped for many years in many different | |
51 | system. | |
52 | ||
53 | The following systems contain with PA-RISC 1.1 chips: | |
54 | ||
55 | 705, 710, 712, 715, 720, 722, 725, 728, 730, 735, 743, 745, 747, 750, | |
56 | 755, 770, 807S, 817S, 827S, 837S, 847S, 857S, 867S, 877S, 887S, 897S, | |
57 | D200, D210, D220, D230, D250, D260, D310, D320, D330, D350, D360, D400, | |
58 | E25, E35, E45, E55, F10, F20, F30, G30, G40, G50, G60, G70, H30, H40, | |
59 | H50, H60, H70, I30, I40, I50, I60, I70, K100, K200, K210, K220, K400, | |
60 | K410, K420, T500, T520 | |
61 | ||
62 | ||
63 | =head2 PA-RISC 2.0 | |
64 | ||
65 | The most recent upgrade to the PA-RISC design, it added support for 64-bit | |
66 | integer data. | |
67 | ||
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68 | The following systems contain PA-RISC 2.0 chips (this is very likely to be |
69 | out of date): | |
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70 | |
71 | D270, D280, D370, D380, K250, K260, K370, K380, K450, K460, K570, K580, | |
72 | T600, V2200 | |
73 | ||
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74 | A complete list of models at the time the OS was built is in the file |
75 | /opt/langtools/lib/sched.models. | |
76 | The first column corresponds to the output of the "uname -m" command | |
77 | (without the leading "9000/"). | |
78 | The second column is the PA-RISC version | |
79 | and the third column is the exact chip type used. | |
80 | ||
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81 | =head2 Portability Between PA-RISC Versions |
82 | ||
83 | An executable compiled on a PA-RISC 2.0 platform will not execute on a | |
84 | PA-RISC 1.1 platform, even if they are running the same version of HP-UX. | |
85 | If you are building Perl on a PA-RISC 2.0 platform and want that Perl to | |
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86 | to also run on a PA-RISC 1.1, the compiler flags +DAportable and +DS32 |
87 | should be used. | |
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88 | |
89 | It is no longer possible to compile PA-RISC 1.0 executables on either the | |
d66be8f9 | 90 | PA-RISC 1.1 or 2.0 platforms. |
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91 | |
92 | =head2 Building Dynamic Extensions on HP-UX | |
93 | ||
94 | HP-UX supports dynamically loadable libraries (shared libraries). | |
95 | Shared libraries end with the suffix .sl. | |
96 | ||
97 | Shared libraries created on a platform using a particular PA-RISC version | |
98 | are not usable on platforms using an earlier PA-RISC version by default. | |
99 | However, this backwards compatibility may be enabled using the same | |
100 | +DAportable compiler flag (with the same PA-RISC 1.0 caveat mentioned above). | |
101 | ||
102 | To create a shared library, the following steps must be performed: | |
103 | ||
104 | 1. Compile source modules with +z or +Z flag to create a .o module | |
105 | which contains Position-Independent Code (PIC). The linker will | |
106 | tell you in the next step if +Z was needed. | |
107 | ||
108 | 2. Link the shared library using the -b flag. If the code calls | |
109 | any functions in other system libraries (e.g., libm), it must | |
110 | be included on this line. | |
111 | ||
112 | (Note that these steps are usually handled automatically by the extension's | |
113 | Makefile). | |
114 | ||
115 | If these dependent libraries are not listed at shared library creation | |
116 | time, you will get fatal "Unresolved symbol" errors at run time when the | |
117 | library is loaded. | |
118 | ||
119 | You may create a shared library that referers to another library, which | |
120 | may be either an archive library or a shared library. If it is a | |
121 | shared library, this is called a "dependent library". | |
122 | The dependent library's name is recorded in the main shared library, | |
123 | but it is not linked into the shared library. | |
124 | Instead, it is loaded when the main shared library is loaded. | |
125 | ||
126 | If the referred library is an archive library, then it is treated as a | |
127 | simple collection of .o modules (all of which must contain PIC). These | |
128 | modules are then linked into the shared library. | |
129 | ||
130 | Note that it is okay to create a library which contains a dependent library | |
131 | that is already linked into perl. | |
132 | ||
133 | It is no longer possible to link PA-RISC 1.0 shared libraries. | |
134 | ||
135 | =head2 The HP ANSI C Compiler | |
136 | ||
137 | When using this compiler to build Perl, you should make sure that | |
138 | the flag -Aa is added to the cpprun and cppstdin variables in the | |
139 | config.sh file. | |
140 | ||
141 | =head2 Using Large Files with Perl | |
142 | ||
d66be8f9 | 143 | Beginning with HP-UX version 10.20, files larger than 2GB (2^31) may be |
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144 | created and manipulated. |
145 | Three separate methods of doing this are available. | |
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146 | Of these methods, |
147 | the best method for Perl is to compile using the -D_FILE_OFFSET_BITS=64 | |
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148 | compiler flag. |
149 | This causes Perl to be compiled using structures and functions in which | |
150 | these are 64 bits wide, rather than 32 bits wide. | |
151 | ||
152 | There are only two drawbacks to this approach: | |
153 | the first is that the seek and tell functions (both the builtin version | |
154 | and the POSIX module's version) will not correctly | |
155 | function for these large files | |
d66be8f9 | 156 | (the offset arguments in seek and tell are implemented as type long). |
f2a260d6 | 157 | The second is that any extension which calls any file-manipulating C function |
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158 | will need to be recompiled using the above-mentioned -D_FILE_OFFSET_BITS=64 |
159 | flag. | |
160 | The list of functions that will need to recompiled is: | |
161 | creat, fgetpos, fopen, | |
162 | freopen, fsetpos, fstat, | |
163 | fstatvfs, fstatvfsdev, ftruncate, | |
164 | ftw, lockf, lseek, | |
165 | lstat, mmap, nftw, | |
166 | open, prealloc, stat, | |
167 | statvfs, statvfsdev, tmpfile, | |
168 | truncate, getrlimit, setrlimit | |
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169 | |
170 | =head2 Threaded Perl | |
171 | ||
172 | It is impossible to compile a version of threaded Perl on any version of | |
173 | HP-UX before 10.30, and it is strongly suggested that you be running on | |
174 | HP-UX 11.00 at least. | |
175 | ||
176 | To compile Perl with thread, add -Dusethreads to the arguments of Configure. | |
177 | Ensure that the -D_POSIX_C_SOURCE=199506L compiler flag is automatically | |
178 | added to the list of flags. Also make sure that -lpthread is listed before | |
179 | -lc in the list of libraries to link Perl with. | |
180 | ||
181 | As of the date of this document, Perl threads are not fully supported on HP-UX. | |
182 | ||
183 | =head2 64-bit Perl | |
184 | ||
185 | Beginning with HP-UX 11.00, programs compiled under HP-UX can take advantage | |
186 | of the LP64 programming environment (LP64 means Longs and Pointers are 64 bits | |
187 | wide). | |
188 | ||
189 | Work is being performed on Perl to make it 64-bit compliant on all versions | |
190 | of Unix. Once this is complete, scalar variables will be able to hold | |
191 | numbers larger than 2^32 with complete precision. | |
192 | ||
193 | As of the date of this document, Perl is not 64-bit compliant on HP-UX. | |
194 | ||
195 | Should a user wish to experiment with compiling Perl in the LP64 environment, | |
196 | the following steps must be taken: libraries must be searched only within | |
197 | /lib/pa20_64, the compiler flag +DD64 must be used, and the C library is | |
198 | now located at /lib/pa20_64/libc.sl. | |
199 | ||
200 | On the brighter side, the large file problem goes away, as longs are now | |
201 | 64 bits wide. | |
202 | ||
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203 | =head2 GDBM and Threads |
204 | ||
205 | If you attempt to compile Perl with threads on an 11.X system and also link | |
206 | in the GDBM library, then Perl will immediately core dump when it starts up. | |
207 | The only workaround at this point is to relink the GDBM library under 11.X, | |
208 | then relink it into Perl. | |
209 | ||
210 | =head2 NFS filesystems and utime(2) | |
211 | ||
212 | If you are compiling Perl on a remotely-mounted NFS filesystem, the test | |
213 | io/fs.t may fail on test #18. | |
214 | This appears to be a bug in HP-UX and no fix is currently available. | |
215 | ||
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216 | =head1 AUTHOR |
217 | ||
218 | Jeff Okamoto <okamoto@corp.hp.com> | |
219 | ||
220 | With much assistance regarding shared libraries from Marc Sabatella. | |
221 | ||
222 | =head1 DATE | |
223 | ||
d66be8f9 | 224 | Version 0.2: 1999/03/01 |
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225 | |
226 | =cut |