[PATCH] test-lib.sh: use awk instead of expr for a POSIX non integer check

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Restrict the glibc version to a single version number and compare it
arithmetically against the base glibc version to avoid accidentally
matching against "2.3" and better supporting versions like "2.34.9000"

Signed-off-by: Carlo Marcelo Arenas Belón <carenas@xxxxxxxxx>
---
 t/test-lib.sh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/t/test-lib.sh b/t/test-lib.sh
index 8e59c58e7e7..f624f87eb81 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -518,9 +518,9 @@ else
 	setup_malloc_check () {
 		MALLOC_CHECK_=3	MALLOC_PERTURB_=165
 		export MALLOC_CHECK_ MALLOC_PERTURB_
-		if _GLIBC_VERSION=$(getconf GNU_LIBC_VERSION 2>/dev/null) &&
-		   _GLIBC_VERSION=${_GLIBC_VERSION#"glibc "} &&
-		   expr 2.34 \<= "$_GLIBC_VERSION" >/dev/null
+		local _GLIBC_VERSION=$(getconf GNU_LIBC_VERSION 2>/dev/null)
+		if echo "$_GLIBC_VERSION" | cut -d. -f1-2 |
+			awk '{ if ($2 - 2.34 < 0) exit 1 }'
 		then
 			g=
 			LD_PRELOAD="libc_malloc_debug.so.0"
-- 
2.35.1.505.g27486cd1b2d




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