I tried your suggestion and I do get lots of errors.
Are these the types of errors that will "bite me in the tukas" ? 
erickn@isfe:/home/erickn/ACE> perl Makefile.PL
Checking if your kit is complete...
Looks good
Writing Makefile for ACE
erickn@isfe:/home/erickn/ACE> make CC=/usr/local/studio8/SUNWspro/bin/
+cc
cp ACE.pm blib/lib/ACE.pm
/home/utils/perl/bin/perl /home/utils/perl/lib/perl5/5.8.0/ExtUtils/xs
+ubpp  -typemap /home/utils/perl/lib/perl5/5.8.0/ExtUtils/typemap -typ
+emap typemap  ACE.xs > ACE.xsc && mv ACE.xsc ACE.c
/usr/local/studio8/SUNWspro/bin/cc -c  -I/opt/Ace750cRev1/postware/ace
+lib  -I/home/utils/perl/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BI
+TS=64 -O    -DVERSION=\"3.00\"  -DXS_VERSION=\"3.00\" -fPIC "-I/home/
+utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE"  -DSolaris64 ACE.c
cc: Warning: illegal option -fPIC
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/perlio.h", line 20
+9: syntax error before or at: __attribute__
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/perlio.h", line 20
+9: warning: old-style declaration or incorrect type for: __attribute_
+_
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/perlio.h", line 20
+9: warning: syntax error:  empty declaration
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/perlio.h", line 26
+9: syntax error before or at: __attribute__
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/perlio.h", line 26
+9: warning: old-style declaration or incorrect type for: __attribute_
+_
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/perlio.h", line 26
+9: identifier redefined: __attribute__
        current : function() returning int
        previous: function() returning int : "/home/utils/perl/lib/per
+l5/5.8.0/sun4-solaris/CORE/perlio.h", line 209
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/perlio.h", line 26
+9: warning: syntax error:  empty declaration
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/perlio.h", line 27
+3: syntax error before or at: __attribute__
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/perlio.h", line 27
+3: warning: old-style declaration or incorrect type for: __attribute_
+_
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/perlio.h", line 27
+3: identifier redefined: __attribute__
        current : function() returning int
        previous: function() returning int : "/home/utils/perl/lib/per
+l5/5.8.0/sun4-solaris/CORE/perlio.h", line 269
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/perlio.h", line 27
+3: warning: syntax error:  empty declaration
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 98:
+ syntax error before or at: __attribute__
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 98:
+ warning: old-style declaration or incorrect type for: __attribute__
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 98:
+ identifier redefined: __attribute__
        current : function() returning int
        previous: function() returning int : "/home/utils/perl/lib/per
+l5/5.8.0/sun4-solaris/CORE/perlio.h", line 273
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 102
+: warning: syntax error:  empty declaration
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 103
+: syntax error before or at: __attribute__
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 103
+: warning: old-style declaration or incorrect type for: __attribute__
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 103
+: identifier redefined: __attribute__
        current : function() returning int
        previous: function() returning int : "/home/utils/perl/lib/per
+l5/5.8.0/sun4-solaris/CORE/proto.h", line 98
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 103
+: warning: syntax error:  empty declaration
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 503
+: syntax error before or at: __attribute__
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 503
+: warning: old-style declaration or incorrect type for: __attribute__
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 503
+: identifier redefined: __attribute__
        current : function() returning int
        previous: function() returning int : "/home/utils/perl/lib/per
+l5/5.8.0/sun4-solaris/CORE/proto.h", line 103
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 503
+: warning: syntax error:  empty declaration
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 504
+: syntax error before or at: __attribute__
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 504
+: warning: old-style declaration or incorrect type for: __attribute__
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 504
+: identifier redefined: __attribute__
        current : function() returning int
        previous: function() returning int : "/home/utils/perl/lib/per
+l5/5.8.0/sun4-solaris/CORE/proto.h", line 503
"/home/utils/perl/lib/perl5/5.8.0/sun4-solaris/CORE/proto.h", line 504
+: warning: syntax error:  empty declaration
cc: acomp failed for ACE.c
*** Error code 2
make: Fatal error: Command failed for target `ACE.o'

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In reply to Re^2: How to make an XS module with a different C compiler? by mifflin
in thread How to make an XS module with a different C compiler? by mifflin

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