build: replace backtick command substitution with $()

This is only needed for the very oldest of non-POSIX-compatible shells. Note that this code will also only be executed on macOS, where it'd be very unlikely to run into such a shell. Followup to bitcoin#1019. See: https://github.com/koalaman/shellcheck/wiki/SC2006 Co-authored-by: Hennadii Stepanov <[email protected]>
sipa · Dec 3, 2021 · 2b7c749 · 2b7c749
1 parent 49f608d
commit 2b7c749
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/configure.ac b/configure.ac
@@ -44,7 +44,7 @@ case $host_os in
          # in expected paths because they may conflict with system files. Ask
          # Homebrew where each one is located, then adjust paths accordingly.
          if $BREW list --versions valgrind >/dev/null; then
-           valgrind_prefix=`$BREW --prefix valgrind 2>/dev/null`
+           valgrind_prefix=$($BREW --prefix valgrind 2>/dev/null)
            VALGRIND_CPPFLAGS="-I$valgrind_prefix/include"
          fi
        else