bump MSRV from 1.54.0 to 1.87.0 (rust)

linux/build

@@ -101,7 +101,7 @@ fi
 rustc_version="$(rustc --version)"
 semver=( ${rustc_version//./ } )
 version="${semver[1]}.${semver[2]}.${semver[3]}"
-MSRV="1.54.0"
+MSRV="1.87.0"
 if [ "$(printf '%s\n' "$MSRV" "$version" | sort -V | head -n1)" = "$MSRV" ]; then
     echo "rustc >= MSRV(${MSRV})"
 else

linux/configure.ac

@@ -104,7 +104,7 @@ if test "x$with_rust" = "xyes" ; then
     AS_IF([test "$RUSTC" = "notfound"], [AC_MSG_ERROR([rustc is required])])
 
     rustc_version=$(rustc --version)
-    MSRV="1.54.0"
+    MSRV="1.87.0"
     AX_COMPARE_VERSION($rustc_version, [ge], [$MSRV],
       [AC_MSG_RESULT(rustc >= $MSRV)],
       [AC_MSG_ERROR([Minimum supported rust version(MSRV) is $MSRV, please upgrade rust])])