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getconf detection: cope with new compiler messages

Browse source 
conf.sh checks for undefined symbols by parsing compiler output and
looking for strings of capital letters and underscores. Modern gcc
produces suggestions for replacement variables too, for example:

error: '_SC_CLOCKRES_MIN' undeclared here (not in a function); did you mean _POSIX_CLOCKRES_MIN?
 _SC_CLOCKRES_MIN,
 ^~~~~~~~~~~~~~~~
 _POSIX_CLOCKRES_MIN

This causes good variables to be excluded along with bad, causing differences
between the builtin and system getconf commands.

src/lib/libast/comp/conf.sh:
- Only use lines containing 'error:' and ignore everything starting
  from 'did you mean:'. (Note this scripts sets the locale to C.)

Patch from @citrus-it:
061a4b1da1
This commit is contained in:
Martijn Dekker 2021-01-15 14:50:55 +00:00
parent 649f4b047b
commit 3aa01a95ee
1 changed files with 2 additions and 1 deletions
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3
src/lib/libast/comp/conf.sh
View file

@ -833,7 +833,8 @@ unsigned int conf[] = {
[ -f $tmp.1.e ] || cp $tmp.e $tmp.1.e
snl='\
'
sed "s/[^_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789][^_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789]*/${snl}/g" $tmp.e |
grep 'error:' $tmp.e | sed "s/did you mean.*//" |
sed "s/[^_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789][^_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789]*/${snl}/g" |
grep '^[_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz][_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789]*$' |
sort -u > $tmp.n
cmp -s $tmp.n $tmp.p && break