[gcc r12-3232] Fix PR 90142: contrib/download_prerequisites uses test ==

[Andrew Pinski <pinskia@gcc.gnu.org>]

https://gcc.gnu.org/g:79a017c412b412f26ec39e0ada75e247fcff5611

commit r12-3232-g79a017c412b412f26ec39e0ada75e247fcff5611
Author: Andrew Pinski <apinski@marvell.com>
Date:   Mon Aug 30 20:30:41 2021 +0000

    Fix PR 90142: contrib/download_prerequisites uses test ==
    
    Since == is not portable, it is better to use = in contrib/
    download_prerequisites.  The only place == was used is inside
    the function md5_check which is used only on Mac OS X.
    
    Tested on Mac OS X as:
    ./contrib/download_prerequisites --md5
    Both with all files having the correct checksum and one with a broken one.
    
    contrib/ChangeLog:
    
            * download_prerequisites (md5_check): Replace == inside
            test with = to be more portable.

Diff:
---
 contrib/download_prerequisites | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/contrib/download_prerequisites b/contrib/download_prerequisites
index 8f69b61f5a9..11c283ecb1a 100755
--- a/contrib/download_prerequisites
+++ b/contrib/download_prerequisites
@@ -113,7 +113,7 @@ md5_check() {
   md5_checksum_output=$(md5 -r "${file_to_check}")
   # Grab the text before the first space
   md5_checksum_detected="${md5_checksum_output%% *}"
-  [ "${md5_checksum_expected}" == "${md5_checksum_detected}" ] \
+  [ "${md5_checksum_expected}" = "${md5_checksum_detected}" ] \
     || die "Cannot verify integrity of possibly corrupted file ${file_to_check}"
   echo "${file_to_check}: OK"
 }