I downloaded JBossTools-ALL-linux-gtk-x86_64-3.0.3.v200910211631N-H194-GA.zip and I tried to install it on linux system.

I was unable to generate rpm files from file .spec (rpmbuild -tb ) in the section %files.
The error I get is:
"errore: Due file su di una riga: /opt/six/share/eclipse/plugins/org.mozilla.xulrunner.carbon.macosx_1.8.1.3-20070904/xulrunner/plugins/Default
errore: Il file deve iniziare con "/": Plugin.plugin"
The problem seems to be the presence of a folder named "Default Plugin.plugin" inside the "plugins\org.mozilla.xulrunner.carbon.macosx_1.8.1.3-20070904\xulrunner\plugins" folder. I suppose folder's name causes the problem. I removed this folder and the generation of rpm completed without errors.
I do not understand the necessity of such folder that seems relative to MAC OS, considering that the plugin is for linux environment.
Here is the .spec file I used:

1. ---- !!!!! DO NOT EDIT THE FOLOWING CCA 20 LINES !!!!! ----

%define six_root /opt/six
%define __check_files %

{nil}

Summary: Prodotto per la configurazione
Name:eclipse
Version: 3.0
Release: 1
License: xxx
Group: SIX
Source: eclipse.tgz
Buildroot: %{_tmppath}/%

{name}%{version}%{release}
Vendor: xxx
Distribution: xxx
Packager: xxxx
AutoReqProv:No

#############################
Provides: eclipse
###### ridefinisce la macro per i diritti di default
%define inst_root %{six_root}/share
%define inst_plugin_inside %{inst_root}/pluginInsideEclipse
%define inst_plugin_outside %{inst_root}/pluginOutsideEclipse
####
%prep
%setup -c -n %{name}

%install

1. crea la bulidroot se non esiste
   [ ! -d % {buildroot} ] && mkdir -p %{buildroot}
2. crea la dir dove fare l'installazione se non esiste
   [ ! -d % {buildroot}%{inst_root} ] && mkdir -p %{buildroot}

   %

   {inst_root}
   # Copio i file nella build root
   for I in noarch; do
   [ ! -d $I ] && continue;
   /bin/cp -a $I/* %{buildroot}%{inst_root}

   /
   done
   unset I
   cd %

   {buildroot}%{inst_root}
   # Scompatto il file .tar.gz nella inst_root
   for I in $(ls *.tar.gz); do
   [ ! -f $I ] && continue;
   gtar xzvf $I
   # elimino i file. tar.gz dalla inst_root
   rm -f $I
   done
   unset I
   cd %{buildroot}

   %

   {inst_plugin_inside}
   # Scompatto i file .zip nella inst_root/pluginInsideEclipse da usare per i plugins che non hanno cartella eclipse
   for I in $(ls *.zip); do
   [ ! -f $I ] && continue;
   unzip -q -o -u $I -d %{buildroot}%{inst_root}/%{name}
   done
   unset I
   cd %{buildroot}%{inst_plugin_outside}
   # Scompatto i file .zip nella inst_root/pluginOutsideEclipse per i plugins che hanno cartella eclipse
   for I in $(ls *.zip); do
   [ ! -f $I ] && continue;
   unzip -q -o -u $I -d %{buildroot}%{inst_root}
   done
   unset I
   
   # Rimozione delle cartelle che contengono i plugin
   rm -rf %{buildroot}%{inst_plugin_inside}

   rm -rf %

   {buildroot}%{inst_plugin_outside}
   # crea lista dei files
   %{six_root}/bin/rpmhelper -f %{buildroot}

   > %{_builddir}/%

   {name}/%{name}

   .files

3. Clean
   %clean
   [ % {buildroot} != "/" ] && rm -rf %{buildroot}

   [ %{_builddir}/%

   {name} != "/" ] && rm -rf %{_builddir}/%{name}

   rm -f %{_sourcedir}/%

   {name}.tgz
   # definisce lista di file da istallare
   %files -f %{_builddir}/%{name}

   /%

   {name}

   .files
   %description
   Istallazione ambiente eclipse e relativi plugin.