Re: [perl #34493] h2ph `extern inline' problems

[p5sagit/p5-mst-13.2.git] / INSTALL

diff --git a/INSTALL b/INSTALL
index 69b446a..fb2d5cd 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -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 +845,16 @@ 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 -Accflags=-DUSE_SITECUSTOMIZE
+
+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