Passing -auxbase to cc1 thru gcc

Passing -auxbase to cc1 thru gcc

[Clifford Wolf]

Hi,

I'm using gcc 3.4.2 and I have the following problem with it:

Usually the -auxbase option to cc1 is autogenerated from the specs file. So
e.g. the gcc call "gcc-34 -v -fprofile-arcs demo.c" results in something
such as:

/usr/libexec/gcc/i386-unknown-linux-gnu/3.4.2/cc1 -quiet -v demo.c -quiet \
  -dumpbase demo.c -auxbase demo -version -fprofile-arcs -o /tmp/ccTzVYVe.s

The "-auxbase demo" is added from the specs file:

%{c|S:%{o*:-auxbase-strip %*}%{!o*:-auxbase %b}}%{!c:%{!S:-auxbase %b}}

So I want to set my own auxbase using something like:

	gcc-34 -v -auxbase /tmp/myprofile/demo -fprofile-arcs demo.c

But this is then converted by gcc to:

gcc-34: /tmp/myprofile/demo: No such file or directory

/usr/libexec/gcc/i386-unknown-linux-gnu/3.4.2/cc1 -quiet -v demo.c -quiet \
-dumpbase demo.c -auxbase -auxbase demo -version-fprofile-arcs -o /tmp/ccezahKk.s

So, because gcc doesn't know -auxbase it just passes it thru to cc1. But
since it doesn't know that -auxbase takes an argument, it simply thinks
that /tmp/myprofile/demo is just another source file..

Should setting -auxbase from the gcc command line be supported? (I've found
the option from reading the gcc sources - there seams to be no
documentation about it.)

Am I doing something wrong or is that a bug in gcc?

yours,
 - clifford

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[PATCH] Re: Passing -auxbase to cc1 thru gcc

[Clifford Wolf]

On Wed, Sep 22, 2004 at 04:18:00PM +0200, Clifford Wolf wrote:
> gcc-34 -v -auxbase /tmp/myprofile/demo -fprofile-arcs demo.c
> [...]

Hi,

I'm not sure whether this silence on the topic means, but here is the
rather trivial fix for the problem:

--- ./gcc/gcc.h.orig	2004-09-24 15:42:27.000000000 +0200
+++ ./gcc/gcc.h	2004-09-24 15:43:24.000000000 +0200
@@ -46,6 +46,7 @@
  (!strcmp (STR, "Tdata") || !strcmp (STR, "Ttext")	\
   || !strcmp (STR, "Tbss") || !strcmp (STR, "include")	\
   || !strcmp (STR, "imacros") || !strcmp (STR, "aux-info") \
+  || !strcmp (STR, "auxbase") || !strcmp (STR, "auxbase-strip") \
   || !strcmp (STR, "idirafter") || !strcmp (STR, "iprefix") \
   || !strcmp (STR, "iwithprefix") || !strcmp (STR, "iwithprefixbefore") \
   || !strcmp (STR, "isystem") || !strcmp (STR, "-param") \
--- ./gcc/gcc.c.orig	2004-09-24 15:44:36.000000000 +0200
+++ ./gcc/gcc.c	2004-09-24 15:48:48.000000000 +0200
@@ -765,9 +765,9 @@
 /* NB: This is shared amongst all front-ends.  */
 static const char *cc1_options =
 "%{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}}\
- %1 %{!Q:-quiet} -dumpbase %B %{d*} %{m*} %{a*}\
+ %1 %{!Q:-quiet} -dumpbase %B %{d*} %{m*}\
  %{c|S:%{o*:-auxbase-strip %*}%{!o*:-auxbase %b}}%{!c:%{!S:-auxbase %b}}\
- %{g*} %{O*} %{W*&pedantic*} %{w} %{std*} %{ansi}\
+ %{a*} %{g*} %{O*} %{W*&pedantic*} %{w} %{std*} %{ansi}\
  %{v:-version} %{pg:-p} %{p} %{f*} %{undef}\
  %{Qn:-fno-ident} %{--help:--help}\
  %{--target-help:--target-help}\

yours,
 - clifford

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To understand recursion, you must first understand recursion.