The RANGE-operator will do the trick here:
use strict;

while (<DATA>) {
    print if m/^SOURCES/ .. m/^RECURSIVE_TARGETS/ and not m/^RECURSIVE
+_TARGETS/;
}


__DATA__
YACCCOMPILE = $(YACC) $(YFLAGS) $(AM_YFLAGS)
LTYACCCOMPILE = $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS)         
+  \
        --mode=compile $(YACC) $(YFLAGS) $(AM_YFLAGS)
YLWRAP = $(top_srcdir)/ylwrap

SOURCES = $(libpiuserland_la_SOURCES) $(pilot_addresses_SOURCES)      
+  \
        $(pilot_clip_SOURCES) $(pilot_csd_SOURCES)                    
+  \
        $(pilot_debugsh_SOURCES) $(pilot_dedupe_SOURCES)              
+  \
        $(pilot_dlpsh_SOURCES) $(pilot_file_SOURCES)                  
+  \
        $(pilot_foto_SOURCES) $(pilot_foto_treo600_SOURCES)           
+  \
        $(pilot_foto_treo650_SOURCES) $(pilot_getram_SOURCES)         
+  \
        $(pilot_getrom_SOURCES) $(pilot_getromtoken_SOURCES)          
+  \
        $(pilot_hinotes_SOURCES) $(pilot_install_datebook_SOURCES)    
+  \
        $(pilot_install_expenses_SOURCES)                             
+  \
        $(pilot_install_hinote_SOURCES) $(pilot_install_memo_SOURCES) 
+  \
        $(pilot_install_netsync_SOURCES) $(pilot_install_todo_SOURCES)
+  \
        $(pilot_install_todos_SOURCES) $(pilot_install_user_SOURCES)  
+  \
        $(pilot_memos_SOURCES) $(pilot_nredir_SOURCES)                
+  \
        $(pilot_read_expenses_SOURCES) $(pilot_read_ical_SOURCES)     
+  \
        $(pilot_read_notepad_SOURCES) $(pilot_read_palmpix_SOURCES)   
+  \
        $(pilot_read_screenshot_SOURCES) $(pilot_read_todos_SOURCES)  
+  \
        $(pilot_read_veo_SOURCES) $(pilot_reminders_SOURCES)          
+  \
        $(pilot_schlep_SOURCES) $(pilot_wav_SOURCES)                  
+  \
        $(pilot_xfer_SOURCES)

RECURSIVE_TARGETS = all-recursive check-recursive dvi-recursive       
+  \
        html-recursive info-recursive install-data-recursive          
+  \
        install-dvi-recursive install-exec-recursive                  
+  \
        install-html-recursive install-info-recursive                 
+  \
        install-pdf-recursive install-ps-recursive install-recursive  
+  \
        installcheck-recursive installdirs-recursive pdf-recursive    
+  \
        ps-recursive uninstall-recursive

[download]

CountZero

A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James

In reply to Re: Reading "slices" out of a file at known start markers by CountZero
in thread Reading "slices" out of a file at known start markers by hacker

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