[Bug preprocessor/107691] New: libcpp configure fails on bashism

[rep.dot.nop at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107691

            Bug ID: 107691
           Summary: libcpp configure fails on bashism
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: preprocessor
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rep.dot.nop at gmail dot com
  Target Milestone: ---

New debian install, /bin/sh points to dash

/scratch/src/gcc-13.orig/libcpp/configure: line 7847: test: =: unary operator
expected

line 7847 reads
  if (test $have_valgrind_h = no \

Why those superfluous braces? Removing them fixes the shell script.