bzip2-1.0.1bzip2-1.0.1

2 files changed, 165 insertions, 8 deletions

diff --git a/README b/README
index ee70649..22945a2 100644
--- a/README
+++ b/README
@@ -1,9 +1,9 @@
 
 This is the README for bzip2, a block-sorting file compressor, version
-0.9.5d.  This version is fully compatible with the previous public
-releases, bzip2-0.1pl2 and bzip2-0.9.0.
+1.0.  This version is fully compatible with the previous public
+releases, bzip2-0.1pl2, bzip2-0.9.0 and bzip2-0.9.5.
 
-bzip2-0.9.5 is distributed under a BSD-style license.  For details,
+bzip2-1.0 is distributed under a BSD-style license.  For details,
 see the file LICENSE.
 
 Complete documentation is available in Postscript form (manual.ps) or
@@ -30,15 +30,37 @@ The -n instructs make to show the commands it would execute, but
 not actually execute them.
 
 
+HOW TO BUILD -- UNIX, shared library libbz2.so.
+
+Do 'make -f Makefile-libbz2_so'.  This Makefile seems to work for
+Linux-ELF (RedHat 5.2 on an x86 box), with gcc.  I make no claims
+that it works for any other platform, though I suspect it probably
+will work for most platforms employing both ELF and gcc.
+
+bzip2-shared, a client of the shared library, is also build, but
+not self-tested.  So I suggest you also build using the normal
+Makefile, since that conducts a self-test.
+
+Important note for people upgrading .so's from 0.9.0/0.9.5 to
+version 1.0.  All the functions in the library have been renamed,
+from (eg) bzCompress to BZ2_bzCompress, to avoid namespace pollution.
+Unfortunately this means that the libbz2.so created by
+Makefile-libbz2_so will not work with any program which used an
+older version of the library.  Sorry.  I do encourage library
+clients to make the effort to upgrade to use version 1.0, since
+it is both faster and more robust than previous versions.
+
+
 HOW TO BUILD -- Windows 95, NT, DOS, Mac, etc.
 
 It's difficult for me to support compilation on all these platforms.
 My approach is to collect binaries for these platforms, and put them
-on my web page (http://www.muraroa.demon.co.uk).  Look there.  However
-(FWIW), bzip2-0.9.5 is very standard ANSI C and should compile
-unmodified with MS Visual C.  For Win32, there is one important
-caveat: in bzip2.c, you must set BZ_UNIX to 0 and BZ_LCCWIN32 to 1
-before building.
+on the master web page (http://sourceware.cygnus.com/bzip2).  Look
+there.  However (FWIW), bzip2-1.0 is very standard ANSI C and should
+compile unmodified with MS Visual C.  For Win32, there is one
+important caveat: in bzip2.c, you must set BZ_UNIX to 0 and
+BZ_LCCWIN32 to 1 before building.  If you have difficulties building,
+you might want to read README.COMPILATION.PROBLEMS.
 
 
 VALIDATION
@@ -116,6 +138,10 @@ WHAT'S NEW IN 0.9.5 ?
    * Many small improvements in file and flag handling.
    * A Y2K statement.
 
+WHAT'S NEW IN 1.0
+
+   See the CHANGES file.
+
 I hope you find bzip2 useful.  Feel free to contact me at
    jseward@acm.org
 if you have any suggestions or queries.  Many people mailed me with
@@ -137,3 +163,4 @@ Cambridge, UK
 23 August 1998 (bzip2, version 0.9.0)
  8   June 1999 (bzip2, version 0.9.5)
  4   Sept 1999 (bzip2, version 0.9.5d)
+ 5    May 2000 (bzip2, version 1.0pre8)
diff --git a/README.COMPILATION.PROBLEMS b/README.COMPILATION.PROBLEMS
new file mode 100644
index 0000000..d621ad5
--- /dev/null
+++ b/README.COMPILATION.PROBLEMS
@@ -0,0 +1,130 @@
+
+bzip2-1.0 should compile without problems on the vast majority of
+platforms.  Using the supplied Makefile, I've built and tested it
+myself for x86-linux, sparc-solaris, alpha-linux, x86-cygwin32 and
+alpha-tru64unix.  With makefile.msc, Visual C++ 6.0 and nmake, you can
+build a native Win32 version too.  Large file support seems to work
+correctly on at least alpha-tru64unix and x86-cygwin32 (on Windows
+2000).
+
+When I say "large file" I mean a file of size 2,147,483,648 (2^31)
+bytes or above.  Many older OSs can't handle files above this size,
+but many newer ones can.  Large files are pretty huge -- most files
+you'll encounter are not Large Files.
+
+Earlier versions of bzip2 (0.1, 0.9.0, 0.9.5) compiled on a wide
+variety of platforms without difficulty, and I hope this version will
+continue in that tradition.  However, in order to support large files,
+I've had to include the define -D_FILE_OFFSET_BITS=64 in the Makefile.
+This can cause problems.
+
+The technique of adding -D_FILE_OFFSET_BITS=64 to get large file
+support is, as far as I know, the Recommended Way to get correct large
+file support.  For more details, see the Large File Support
+Specification, published by the Large File Summit, at
+   http://www.sas.com/standard/large.file/
+
+As a general comment, if you get compilation errors which you think
+are related to large file support, try removing the above define from
+the Makefile, ie, delete the line
+   BIGFILES=-D_FILE_OFFSET_BITS=64 
+from the Makefile, and do 'make clean ; make'.  This will give you a
+version of bzip2 without large file support, which, for most
+applications, is probably not a problem.  
+
+Alternatively, try some of the platform-specific hints listed below.
+
+You can use the spewG.c program to generate huge files to test bzip2's
+large file support, if you are feeling paranoid.  Be aware though that
+any compilation problems which affect bzip2 will also affect spewG.c,
+alas.
+
+
+Known problems as of 1.0pre8:
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+* HP/UX 10.20 and 11.00, using gcc (2.7.2.3 and 2.95.2):  A large
+  number of warnings appear, including the following:
+
+     /usr/include/sys/resource.h: In function `getrlimit':
+     /usr/include/sys/resource.h:168: 
+        warning: implicit declaration of function `__getrlimit64'
+     /usr/include/sys/resource.h: In function `setrlimit':
+     /usr/include/sys/resource.h:170: 
+        warning: implicit declaration of function `__setrlimit64'
+
+  This would appear to be a problem with large file support, header
+  files and gcc.  gcc may or may not give up at this point.  If it
+  fails, you might be able to improve matters by adding 
+     -D__STDC_EXT__=1
+  to the BIGFILES variable in the Makefile (ie, change its definition
+  to
+     BIGFILES=-D_FILE_OFFSET_BITS=64 -D__STDC_EXT__=1
+
+  Even if gcc does produce a binary which appears to work (ie passes
+  its self-tests), you might want to test it to see if it works properly
+  on large files.
+
+
+* HP/UX 10.20 and 11.00, using HP's cc compiler.
+
+  No specific problems for this combination, except that you'll need to
+  specify the -Ae flag, and zap the gcc-specific stuff
+  -Wall -Winline -O2 -fomit-frame-pointer -fno-strength-reduce.
+  You should retain -D_FILE_OFFSET_BITS=64 in order to get large
+  file support -- which is reported to work ok for this HP/UX + cc
+  combination.
+
+
+* SunOS 4.1.X.
+
+  Amazingly, there are still people out there using this venerable old
+  banger.  I shouldn't be too rude -- I started life on SunOS, and
+  it was a pretty darn good OS, way back then.  Anyway:
+
+     SunOS doesn't seem to have strerror(), so you'll have to use
+     perror(), perhaps by doing adding this (warning: UNTESTED CODE):
+
+     char* strerror ( int errnum )
+     {
+        if (errnum < 0 || errnum >= sys_nerr)
+           return "Unknown error"; 
+        else
+           return sys_errlist[errnum];
+     }
+
+   Or you could comment out the relevant calls to strerror; they're
+   not mission-critical.  Or you could upgrade to Solaris.  Ha ha ha!
+   (what??  you think I've got Bad Attitude?) 
+
+
+* Making a shared library on Solaris.  (Not really a compilation
+  problem, but many people ask ...)  
+
+  Firstly, if you have Solaris 8, either you have libbz2.so already
+  on your system, or you can install it from the Solaris CD.  
+
+  Secondly, be aware that there are potential naming conflicts
+  between the .so file supplied with Solaris 8, and the .so file
+  which Makefile-libbz2_so will make.  Makefile-libbz2_so creates
+  a .so which has the names which I intend to be "official" as
+  of version 1.0.0 and onwards.  Unfortunately, the .so in
+  Solaris 8 appeared before I decided on the final names, so
+  the two libraries are incompatible.  We have since communicated
+  and I hope that the problems will have been solved in the next
+  version of Solaris, whenever that might appear.
+
+  All that said: you might be able to get somewhere
+  by finding the line in Makefile-libbz2_so which says
+
+  $(CC) -shared -Wl,-soname -Wl,libbz2.so.1.0 -o libbz2.so.1.0.1 $(OBJS)
+
+  and replacing with 
+
+  ($CC) -G -shared -o libbz2.so.1.0.1 -h libbz2.so.1.0 $(OBJS)
+  
+  If gcc objects to the combination -fpic -fPIC, get rid of
+  the second one, leaving just "-fpic".
+
+
+That's the end of the currently known compilation problems.