Has anybody tested that ?

Well, if the file system is case insensitive, makefile.pl will work, but MakeMaker will install makefile.pl along with the .pm

See 

$ module-starter --eumm --email email --author author --verbose --modu
+le=LowerCasedMakefilePL
Created LowerCasedMakefilePL
Created LowerCasedMakefilePL\lib
Created LowerCasedMakefilePL\lib\LowerCasedMakefilePL.pm
Created LowerCasedMakefilePL\t
Created LowerCasedMakefilePL\t\pod-coverage.t
Created LowerCasedMakefilePL\t\pod.t
Created LowerCasedMakefilePL\t\manifest.t
Created LowerCasedMakefilePL\t\boilerplate.t
Created LowerCasedMakefilePL\t\00-load.t
Created LowerCasedMakefilePL\ignore.txt
Created LowerCasedMakefilePL\Makefile.PL
Created LowerCasedMakefilePL\Changes
Created LowerCasedMakefilePL\README
Added to MANIFEST: Changes
Added to MANIFEST: ignore.txt
Added to MANIFEST: lib/LowerCasedMakefilePL.pm
Added to MANIFEST: Makefile.PL
Added to MANIFEST: MANIFEST
Added to MANIFEST: README
Added to MANIFEST: t/00-load.t
Added to MANIFEST: t/boilerplate.t
Added to MANIFEST: t/manifest.t
Added to MANIFEST: t/pod-coverage.t
Added to MANIFEST: t/pod.t
Created LowerCasedMakefilePL\MANIFEST
Created starter directories and files

$ cd LowerCasedMakefilePL

$ mv Makefile.PL makefile.pl
mv: `Makefile.PL' and `makefile.pl' are the same file

$ rename Makefile.PL makefile.pl

$ cpanm .
--> Working on .
Configuring C:/Temp/LowerCasedMakefilePL ... OK
Building and testing LowerCasedMakefilePL-0.01 ... OK
Successfully installed LowerCasedMakefilePL-0.01
1 distribution installed

$ pm-uninstall LowerCasedMakefilePL
--> Working on LowerCasedMakefilePL
LowerCasedMakefilePL is included in the distribution LowerCasedMakefil
+ePL and contains:

  c:\citrusperl\site\lib\LowerCasedMakefilePL.pm
  c:\citrusperl\site\lib\makefile.pl

Are you sure you want to uninstall LowerCasedMakefilePL? [y] y

Successfully uninstalled LowerCasedMakefilePL

You may want to rebuild man(1) entries. Try `mandb -c` if needed

$

[download]

Naturally it won't work on case sensitive filesystems

In reply to Re^2: Why Makefile.PL uses uppercase extension? by Anonymous Monk
in thread Why Makefile.PL uses uppercase extension? by Anonymous Monk

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