diff options
Diffstat (limited to 'INSTALL')
| -rw-r--r-- | INSTALL | 23 |
1 files changed, 17 insertions, 6 deletions
@@ -20,7 +20,7 @@ The basic steps to build and install perl5 on a Unix system are: Each of these is explained in further detail below. For information on non-Unix systems, see the section on -L<"Porting Information"> below. +L<"Porting information"> below. =head1 DESCRIPTION @@ -616,11 +616,22 @@ In a future version of perl, these might be enabled by default. =over 4 +=item -DDEBUGGING_MSTATS + +If C<DEBUGGING_MSTATS> is defined, you can extract malloc +statistics from the Perl interpreter. The overhead this imposes is not +large (perl just twiddles integers at malloc/free/sbrk time). When you +run perl with the environment variable C<PERL_DEBUG_MSTATS> set to +either 1 or 2, the interpreter will dump statistics to stderr at exit +time and (with a value of 2) after compilation. If you install the +Devel::Peek module you can get the statistics whenever you like by +invoking its mstat() function. + =item -DEMERGENCY_SBRK -If this macro is defined, running out of memory need not be a fatal -error: a memory pool can allocated by assigning to the special -variable C<$^M>. +If C<EMERGENCY_SBRK> is defined, running out of memory need not be a +fatal error: a memory pool can allocated by assigning to the special +variable C<$^M>. See L<perlvar> for more details. =item -DPACK_MALLOC @@ -787,7 +798,7 @@ mechanism. =item Porting information -Specific information for the OS/2, Plan9, VMS and Win32 ports are in the +Specific information for the OS/2, Plan9, VMS and Win32 ports is in the corresponding subdirectories. Additional information, including a glossary of all those config.sh variables, is in the Porting subdirectory. @@ -1274,4 +1285,4 @@ from the original README by Larry Wall. =head1 LAST MODIFIED -$Id: INSTALL,v 1.3 1997/02/28 16:34:11 doughera Released $ +$Id: INSTALL,v 1.5 1997/03/08 18:15:49 doughera Released $ |