Problems bootstrapping on AIX

[Jens Rehsack <rehsack%web.de@localhost>]

Hi Joerg,

I hope it's ok to mail directly to you and cc pkgsrc-users@, because you're 
the one who always answers those questions ...

Acting on your advice we bougth an xlC for AIX, and I bootstrapped again.
I got some errors, where I need some more advice how to correct them in the 
way, pkgsrc would benefit.

First, I've seen, there're independently from used compiler a lot of gcc 
warning flags used:

Index: pkgtools/bootstrap-mk-files/files/bsd.sys.mk
===================================================================
RCS file: /cvsroot/pkgsrc/pkgtools/bootstrap-mk-files/files/bsd.sys.mk,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 bsd.sys.mk
--- pkgtools/bootstrap-mk-files/files/bsd.sys.mk	14 Jul 2006 23:13:01 -0000 
1.1.1.1
+++ pkgtools/bootstrap-mk-files/files/bsd.sys.mk        26 Sep 2008 08:28:54 
-0000
@@ -4,20 +4,20 @@

 .if defined(WARNS)
 .if ${WARNS} > 0
-CFLAGS+= -Wall -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith
+#CFLAGS+= -Wall -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith
 # XXX Delete -Wuninitialized by default for now -- the compiler doesn't
 # XXX always get it right.
-CFLAGS+= -Wno-uninitialized
+#CFLAGS+= -Wno-uninitialized
 .endif
 .if ${WARNS} > 1
-CFLAGS+=-Wreturn-type -Wcast-qual -Wpointer-arith -Wwrite-strings
-CFLAGS+=-Wswitch -Wshadow
+#CFLAGS+=-Wreturn-type -Wcast-qual -Wpointer-arith -Wwrite-strings
+#CFLAGS+=-Wswitch -Wshadow
 .endif
 .endif

 .if defined(WFORMAT) && defined(FORMAT_AUDIT)
 .if ${WFORMAT} > 1
-CFLAGS+=-Wnetbsd-format-audit -Wno-format-extra-args
+#CFLAGS+=-Wnetbsd-format-audit -Wno-format-extra-args
 .endif
 .endif

Next I've seen, lang/perl5 adds -q64 to the LDFLAGS, which probably ld 
tool-wrapper should filter out. shells/bash or editors/vim or any of the 
dependencies wants to use gcc warnings even for xlc compiler and one of them 
tries to add a -Wl,-E to ld.
The question is: what would be the best way for pkgsrc on AIX: Searching 
such incompatibilities and add them to the pkgsrc created wrappers? Or would 
it better to recommend using gxlc which tries to translate gcc arguments 
into corresponding xlc ones?

Best regards,
Jens