I have regstapped r187893 with the following patch
[karma] gcc/darwin_buildw% diff -up ../_gcc_clean/libcpp/lex.c
../work/libcpp/lex.c
--- ../_gcc_clean/libcpp/lex.c 2012-05-25 08:54:05.000000000 +0200
+++ ../work/libcpp/lex.c 2012-05-27 13:25:08.000000000 +0200
@@ -592,7 +592,8 @@ search_line_fast (const uchar *s, const
union {
vc v;
- unsigned long l[N];
+ /* Statically assert that N is 2 or 4. */
+ unsigned long l[(N == 2 || N == 4) ? N : -1];
} u;
unsigned long l, i = 0;
without related regression.
> You can simply rename the 'l' array to the error you want to output, so you
> get an error like:
>
> error: size of array 'the_vector_size_has_to_be_the_size_of_2_or_4_long' is
> negative
I am not convinced that will help anyone trying to extend the actual
implementation for an altivec platform with N != 2 or 4 (though I
seriously doubt that'll append). May be the comment could be made
more explicit along the line
"Generates "error: size of array 'l' is negative" at compile time
if the vector size is not equal to be the size of 2 or 4 long"
(feel free to convert Frenglish to native English).
Dominique
