Oops. Forgot to add this.

[perl5.git] / INSTALL

diff --git a/INSTALL b/INSTALL
index 69b446a..42ce893 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -527,7 +527,7 @@ One can still revert to the old guaranteed repeatable order (and be
 vulnerable to attack by wily crackers) by setting the environment
 variable PERL_HASH_SEED, see L<perlrun/PERL_HASH_SEED>.  Another option
 is to add -DUSE_HASH_SEED_EXPLICIT to the compilation flags (for
-example by using C<Configure -Accflags=-DUSE_HAS_SEED_EXPLICIT>), in
+example by using C<Configure -Accflags=-DUSE_HASH_SEED_EXPLICIT>), in
 which case one has to explicitly set the PERL_HASH_SEED environment
 variable to enable the security feature, or by adding -DNO_HASH_SEED to
 the compilation flags to completely disable the randomisation feature.
@@ -657,6 +657,19 @@ architecture-dependent library for your -DDEBUGGING version of perl.
 You can do this by changing all the *archlib* variables in config.sh to
 point to your new architecture-dependent library.
 
+=head3 Environment access
+
+Perl often needs to write to the program's environment, such as when C<%ENV>
+is assigned to. Many implementations of the C library function C<putenv()>
+leak memory, so where possible perl will manipulate the environment directly
+to avoid these leaks. The default is now to perform direct manipulation
+whenever perl is running as a stand alone interpreter, and to call the safe
+but potentially leaky C<putenv()> function when the perl interpreter is
+embedded in another application. You can force perl to always use C<putenv()>
+by compiling with -DPERL_USE_SAVE_PUTENV. You can force an embedded perl to
+use direct manipulation by setting C<PL_use_safe_putenv = 0;> after the
+C<perl_construct()> call.
+
 =head2 Installation Directories
 
 The installation directories can all be changed by answering the
@@ -832,6 +845,17 @@ present, at run time.  Of course, you can still search other @INC
 directories ahead of those in APPLLIB_EXP by using any of the standard
 run-time methods: $PERLLIB, $PERL5LIB, -I, use lib, etc.
 
+=item USE_SITECUSTOMIZE
+
+Run-time customization of @INC can be enabled with:
+
+       sh Configure -Dusesitecustomize
+
+Which will define USE_SITECUSTOMIZE and $Config{usesitecustomize}.
+When enabled, make perl run F<$sitelibexp/sitecustomize.pl> before
+anything else.  This script can then be set up to add additional
+entries to @INC.
+
 =item Man Pages
 
 In versions 5.005_57 and earlier, the default was to store module man