updating README.macosx to reflect current systems.

1 files changed, 47 insertions, 29 deletions

diff --git a/README.macosx b/README.macosx
index 0501b1ff64..71913523ff 100644
--- a/README.macosx
+++ b/README.macosx
@@ -10,9 +10,9 @@ perlmacosx - Perl under Mac OS X
 
 This document briefly describes Perl under Mac OS X.
 
-  curl http://www.cpan.org/src/perl-5.12.3.tar.gz > perl-5.12.3.tar.gz 
-  tar -xzf perl-5.12.3.tar.gz 
-  cd perl-5.12.3
+  curl http://www.cpan.org/src/perl-5.18.0.tar.gz > perl-5.18.0.tar.gz
+  tar -xzf perl-5.18.0.tar.gz
+  cd perl-5.18.0
   ./Configure -des -Dprefix=/usr/local/
   make
   make test
@@ -20,13 +20,23 @@ This document briefly describes Perl under Mac OS X.
 
 =head1 DESCRIPTION
 
-The latest Perl release (5.12.3 as of this writing) builds without changes
+The latest Perl release (5.18.0 as of this writing) builds without changes
 under all versions of Mac OS X from 10.3 "Panther" onwards. 
 
-In order to build your own version of Perl you will need 'make'
-this is part of the Apples developer tools (you only need the 'unix tools'),
-usually supplied with Mac OS install DVDs. You do not need the latest 
-version of Xcode (which is now charged for) in order to install make.
+In order to build your own version of Perl you will need 'make',
+which is part of Apple's developer tools - also known as Xcode. From
+Mac OS X 10.7 "Lion" onwards, it can be downloaded separately as the
+'Command Line Tools' bundle directly from L<https://developer.apple.com/downloads/>
+(you will need a free account to log in), or as a part of the Xcode suite,
+freely available at the App Store. Xcode is a pretty big app, so
+unless you already have it or really want it, you are advised to get the
+'Command Line Tools' bundle separately from the link above. If you want
+to do it from within Xcode, go to Xcode -> Preferences -> Downloads and
+select the 'Command Line Tools' option.
+
+Between Mac OS X 10.3 "Panther" and 10.6 "Snow Leopard", the 'Command
+Line Tools' bundle was called 'unix tools', and was usually supplied
+with Mac OS install DVDs.
 
 Earlier Mac OS X releases (10.2 "Jaguar" and older) did not include a
 completely thread-safe libc, so threading is not fully supported. Also,
@@ -53,9 +63,18 @@ on a file server and used by many Macs.
 
 First, export the path to the SDK into the build environment:
 
-    export SDK=/Developer/SDKs/MacOSX10.3.9.sdk
+    export SDK=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk
 
-Use an SDK by exporting some additions to Perl's 'ccflags' and '..flags'
+Please make sure the SDK version (i.e. the numbers right before '.sdk')
+matches your system's (in this case, Mac OS X 10.8 "Mountain Lion"), as it is
+possible to have more than one SDK installed. Also make sure the path exists
+in your system, and if it doesn't please make sure the SDK is properly
+installed, as it should come with the 'Command Line Tools' bundle mentioned
+above. Finally, if you have an older Mac OS X (10.6 "Snow Leopard" and below)
+running Xcode 4.2 or lower, the SDK path might be something like
+C<'/Developer/SDKs/MacOSX10.3.9.sdk'>.
+
+You can use the SDK by exporting some additions to Perl's 'ccflags' and '..flags'
 config variables:
 
     ./Configure -Accflags="-nostdinc -B$SDK/usr/include/gcc \
@@ -66,11 +85,18 @@ config variables:
 
 =head2 Universal Binary support
 
-To compile perl as a universal binary (built for both ppc and intel), export
-the SDK variable as above, selecting the 10.4u SDK:
+Note: From Mac OS X 10.6 "Snow Leopard" onwards, Apple only supports
+Intel-based hardware. This means you can safely skip this section unless
+you have an older Apple computer running on ppc or wish to create a perl
+binary with backwards compatibility.
+
+You can compile perl as a universal binary (built for both ppc and intel).
+In Mac OS X 10.4 "Tiger", you must export the 'u' variant of the SDK:
 
     export SDK=/Developer/SDKs/MacOSX10.4u.sdk
 
+Mac OS X 10.5 "Leopard" and above do not require the 'u' variant.
+
 In addition to the compiler flags used to select the SDK, also add the flags
 for creating a universal binary:
 
@@ -80,12 +106,6 @@ for creating a universal binary:
                 -Aldflags="-arch i686 -arch ppc -Wl,-syslibroot,$SDK" \
                 -de
 
-In Leopard (MacOSX 10.5.6 at the time of this writing) you must use the 10.5 SDK:
-
-    export SDK=/Developer/SDKs/MacOSX10.5.sdk
-
-You can use the same compiler flags you would use with the 10.4u SDK.
-
 Keep in mind that these compiler and linker settings will also be used when
 building CPAN modules. For XS modules to be compiled as a universal binary, any
 libraries it links to must also be universal binaries. The system libraries that
@@ -136,17 +156,15 @@ need to go to a great deal of effort to obtain the information needed
 for pre-binding.
 
 You can override the default and build a shared libperl if you wish
-(S<Configure ... -Duseshrplib>), but the load time on pre-10.4 OS
-releases will be greater than either the static library, or Apple's
-pre-bound dynamic library.
-
-With 10.4 "Tiger" and newer, Apple has all but eliminated the performance
-penalty for non-prebound libraries.
+(S<Configure ... -Duseshrplib>).
 
+With Mac OS X 10.4 "Tiger" and newer, there is almost no performance
+penalty for non-prebound libraries. Earlier releases will suffer a greater
+load time than either the static library, or Apple's pre-bound dynamic library.
 
 =head2 Updating Apple's Perl
 
-In a word - don't, at least without a *very* good reason. Your scripts
+In a word - don't, at least not without a *very* good reason. Your scripts
 can just as easily begin with "#!/usr/local/bin/perl" as with
 "#!/usr/bin/perl". Scripts supplied by Apple and other third parties as
 part of installation packages and such have generally only been tested
@@ -247,10 +265,10 @@ reinstall the entire OS.
 =head1 AUTHOR
 
 This README was written by Sherm Pendley E<lt>sherm@dot-app.orgE<gt>,
-and subsequently updated by Dominic Dunlop E<lt>domo@computer.orgE<gt>.
-The "Starting From Scratch" recipe was contributed by John Montbriand
-E<lt>montbriand@apple.comE<gt>.
+and subsequently updated by Dominic Dunlop E<lt>domo@computer.orgE<gt>
+and Breno G. de Oliveira E<lt>garu@cpan.orgE<gt>. The "Starting From Scratch"
+recipe was contributed by John Montbriand E<lt>montbriand@apple.comE<gt>.
 
 =head1 DATE
 
-Last modified 2006-02-24.
+Last modified 2013-04-29.