[sr #110312] 2.69b: broken AC_PROG_LEX macro

[Tomasz Kłoczko]

URL:
  <https://savannah.gnu.org/support/?110312>

                 Summary: 2.69b: broken AC_PROG_LEX macro
                 Project: Autoconf
            Submitted by: kloczek
            Submitted on: Tue 15 Sep 2020 08:14:18 PM UTC
                Category: None
                Priority: 5 - Normal
                Severity: 3 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
        Operating System: None

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Details:

Looks like AC_PROG_LEX on testing is trying to link with liblex and on that it
fails when GNU flex is installed:

```
checking for flex... flex
checking for lex output file root... lex.yy
checking for lex library... not found
configure: error: required lex library not found
```
All because glu flex provides only libfl.

$ rpm -ql flex| grep lib64
/usr/lib64/libfl.a





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