Fix string corruption with (??{}) and PERL_NO_COW

[perl5.git] / README.tru64

diff --git a/README.tru64 b/README.tru64
index d203ded..8f7e9b9 100644 (file)
--- a/README.tru64
+++ b/README.tru64
@@ -4,7 +4,7 @@ designed to be readable as is.
 
 =head1 NAME
 
-README.tru64 - Perl version 5 on Tru64 (formerly known as Digital UNIX formerly known as DEC OSF/1) systems
+perltru64 - Perl version 5 on Tru64 (formerly known as Digital UNIX formerly known as DEC OSF/1) systems
 
 =head1 DESCRIPTION
 
@@ -34,6 +34,19 @@ lowered that.  The configuration process of Perl checks for too low
 process limits, and lowers the optimization for the toke.c if
 necessary, and also gives advice on how to raise the process limits.
 
+Also, Configure might abort with
+
+    Build a threading Perl? [n]
+    Configure[2437]: Syntax error at line 1 : 'config.sh' is not expected.
+
+This indicates that Configure is being run with a broken Korn shell
+(even though you think you are using a Bourne shell by using
+"sh Configure" or "./Configure").  The Korn shell bug has been reported
+to Compaq as of February 1999 but in the meanwhile, the reason ksh is
+being used is that you have the environment variable BIN_SH set to
+'xpg4'.  This causes /bin/sh to delegate its duties to /bin/posix/sh
+(a ksh).  Unset the environment variable and rerun Configure.
+
 =head2 Using Large Files with Perl on Tru64
 
 In Tru64 Perl is automatically able to use large files, that is,
@@ -50,6 +63,11 @@ Perl threading is going to work only in Tru64 4.0 and newer releases,
 older operating releases like 3.2 aren't probably going to work
 properly with threads.
 
+In Tru64 V5 (at least V5.1A, V5.1B) you cannot build threaded Perl with gcc
+because the system header <pthread.h> explicitly checks for supported
+C compilers, gcc (at least 3.2.2) not being one of them.  But the
+system C compiler should work just fine.
+
 =head2 Long Doubles on Tru64
 
 You cannot Configure Perl to use long doubles unless you have at least
@@ -88,7 +106,7 @@ and then using the BerkeleyDB module from CPAN instead of DB_File.
 The BerkeleyDB works with Berkeley DB versions 2.* or greater.
 
 The Berkeley DB 4.1.25 has been tested with Tru64 V5.1A and found
-to work.  The latest Berkeley DB can be found from F<http://www.sleepycat.com>.
+to work.  The latest Berkeley DB can be found from L<http://www.sleepycat.com>.
 
 =head2 64-bit Perl on Tru64
 
@@ -102,13 +120,15 @@ since pointers are automatically 64-bit wide.
 When compiling Perl in Tru64 you may (depending on the compiler
 release) see two warnings like this
 
-    cc: Warning: numeric.c, line 104: In this statement, floating-point overflow occurs in evaluating the expression "1.8e308". (floatoverfl)
+    cc: Warning: numeric.c, line 104: In this statement, floating-point
+    overflow occurs in evaluating the expression "1.8e308". (floatoverfl)
         return HUGE_VAL;
     -----------^
 
 and when compiling the POSIX extension
 
-    cc: Warning: const-c.inc, line 2007: In this statement, floating-point overflow occurs in evaluating the expression "1.8e308". (floatoverfl)
+    cc: Warning: const-c.inc, line 2007: In this statement, floating-point
+    overflow occurs in evaluating the expression "1.8e308". (floatoverfl)
                 return HUGE_VAL;
     -------------------^