Re: [PATCH] configure: Escape non-numbers in version_ge()

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 2/2/21 1:43 PM, Alex Bennée wrote:
> 
> Philippe Mathieu-Daudé <philmd@redhat.com> writes:
> 
>> On Red Hat based distributions, the configure script emits various
>> warnings:
>>
>>   # ./configure
>>   Using './build' as the directory for build output
>>   ./configure: line 212: test: 2-15: integer expression expected
>>   ./configure: line 213: test: 2-15: integer expression expected
>>   ./configure: line 212: test: el8: integer expression expected
>>   ./configure: line 213: test: el8: integer expression expected
>>
>> This is produced by the gdb version check introduced in commit
>> b1863ccc957 ("configure: gate our use of GDB to 8.3.1 or above"):
>>
>>     gdb_version=$($gdb_bin --version | head -n 1)
>>     if version_ge ${gdb_version##* } 8.3.1; then
>>         echo "HAVE_GDB_BIN=$gdb_bin" >> $config_host_mak
>>     fi
>>
>> Because on RHEL/Fedora the minor version is not a plain number:
>>
>>   $ gdb --version | head -n 1
>>   GNU gdb (GDB) Fedora 9.1-7.fc32
>>
>>   $ gdb --version | head -n 1
>>   GNU gdb (GDB) Red Hat Enterprise Linux 8.2-15.el8
>>
>> Fix by only using the leading numbers, stripping the rest.
>>
>> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
>> ---
>>  configure | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/configure b/configure
>> index e85d6baf8f8..21f6530a812 100755
>> --- a/configure
>> +++ b/configure
>> @@ -205,7 +205,7 @@ version_ge () {
>>          local_first=${2-0}
>>          # 'shift 2' if $2 is set, or 'shift' if $2 is not set
>>          shift ${2:+2}
>> -        local_ver1=$*
>> +        local_ver1=$(echo $* | sed -E 's/(^[0-9]+).*/\1/')
>>          set x $local_ver2
>>          # the second argument finished, the first must be greater or equal
>>          test $# = 1 && return 0
> 
> I already have a fix that was posted in:
> 
>   Subject: [PATCH  v2 7/8] configure: make version_ge more tolerant of shady version input
>   Date: Fri, 22 Jan 2021 18:18:53 +0000
>   Message-Id: <20210122181854.23105-8-alex.bennee@linaro.org>
> 
> About to feature in the pre-PR series I'm about to post.

Oh I missed it.

Thanks,

Phil.