2 bzip2-1.0 should compile without problems on the vast majority of
3 platforms. Using the supplied Makefile, I've built and tested it
4 myself for x86-linux, sparc-solaris, alpha-linux, x86-cygwin32 and
5 alpha-tru64unix. With makefile.msc, Visual C++ 6.0 and nmake, you can
6 build a native Win32 version too. Large file support seems to work
7 correctly on at least alpha-tru64unix and x86-cygwin32 (on Windows
10 When I say "large file" I mean a file of size 2,147,483,648 (2^31)
11 bytes or above. Many older OSs can't handle files above this size,
12 but many newer ones can. Large files are pretty huge -- most files
13 you'll encounter are not Large Files.
15 Earlier versions of bzip2 (0.1, 0.9.0, 0.9.5) compiled on a wide
16 variety of platforms without difficulty, and I hope this version will
17 continue in that tradition. However, in order to support large files,
18 I've had to include the define -D_FILE_OFFSET_BITS=64 in the Makefile.
19 This can cause problems.
21 The technique of adding -D_FILE_OFFSET_BITS=64 to get large file
22 support is, as far as I know, the Recommended Way to get correct large
23 file support. For more details, see the Large File Support
24 Specification, published by the Large File Summit, at
25 http://www.sas.com/standard/large.file/
27 As a general comment, if you get compilation errors which you think
28 are related to large file support, try removing the above define from
29 the Makefile, ie, delete the line
30 BIGFILES=-D_FILE_OFFSET_BITS=64
31 from the Makefile, and do 'make clean ; make'. This will give you a
32 version of bzip2 without large file support, which, for most
33 applications, is probably not a problem.
35 Alternatively, try some of the platform-specific hints listed below.
37 You can use the spewG.c program to generate huge files to test bzip2's
38 large file support, if you are feeling paranoid. Be aware though that
39 any compilation problems which affect bzip2 will also affect spewG.c,
43 Known problems as of 1.0pre8:
44 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
46 * HP/UX 10.20 and 11.00, using gcc (2.7.2.3 and 2.95.2): A large
47 number of warnings appear, including the following:
49 /usr/include/sys/resource.h: In function `getrlimit':
50 /usr/include/sys/resource.h:168:
51 warning: implicit declaration of function `__getrlimit64'
52 /usr/include/sys/resource.h: In function `setrlimit':
53 /usr/include/sys/resource.h:170:
54 warning: implicit declaration of function `__setrlimit64'
56 This would appear to be a problem with large file support, header
57 files and gcc. gcc may or may not give up at this point. If it
58 fails, you might be able to improve matters by adding
60 to the BIGFILES variable in the Makefile (ie, change its definition
62 BIGFILES=-D_FILE_OFFSET_BITS=64 -D__STDC_EXT__=1
64 Even if gcc does produce a binary which appears to work (ie passes
65 its self-tests), you might want to test it to see if it works properly
69 * HP/UX 10.20 and 11.00, using HP's cc compiler.
71 No specific problems for this combination, except that you'll need to
72 specify the -Ae flag, and zap the gcc-specific stuff
73 -Wall -Winline -O2 -fomit-frame-pointer -fno-strength-reduce.
74 You should retain -D_FILE_OFFSET_BITS=64 in order to get large
75 file support -- which is reported to work ok for this HP/UX + cc
81 Amazingly, there are still people out there using this venerable old
82 banger. I shouldn't be too rude -- I started life on SunOS, and
83 it was a pretty darn good OS, way back then. Anyway:
85 SunOS doesn't seem to have strerror(), so you'll have to use
86 perror(), perhaps by doing adding this (warning: UNTESTED CODE):
88 char* strerror ( int errnum )
90 if (errnum < 0 || errnum >= sys_nerr)
91 return "Unknown error";
93 return sys_errlist[errnum];
96 Or you could comment out the relevant calls to strerror; they're
97 not mission-critical. Or you could upgrade to Solaris. Ha ha ha!
98 (what?? you think I've got Bad Attitude?)
101 * Making a shared library on Solaris. (Not really a compilation
102 problem, but many people ask ...)
104 Firstly, if you have Solaris 8, either you have libbz2.so already
105 on your system, or you can install it from the Solaris CD.
107 Secondly, be aware that there are potential naming conflicts
108 between the .so file supplied with Solaris 8, and the .so file
109 which Makefile-libbz2_so will make. Makefile-libbz2_so creates
110 a .so which has the names which I intend to be "official" as
111 of version 1.0.0 and onwards. Unfortunately, the .so in
112 Solaris 8 appeared before I decided on the final names, so
113 the two libraries are incompatible. We have since communicated
114 and I hope that the problems will have been solved in the next
115 version of Solaris, whenever that might appear.
117 All that said: you might be able to get somewhere
118 by finding the line in Makefile-libbz2_so which says
120 $(CC) -shared -Wl,-soname -Wl,libbz2.so.1.0 -o libbz2.so.1.0.2 $(OBJS)
124 $(CC) -G -shared -o libbz2.so.1.0.2 -h libbz2.so.1.0 $(OBJS)
126 If gcc objects to the combination -fpic -fPIC, get rid of
127 the second one, leaving just "-fpic".
130 That's the end of the currently known compilation problems.