don't produce a false negative for %z with CFLAGS=-Werror

(cherry picked from commit 800012de23ef63ff6d34dd7dac99cd2291955640)

diff --git a/configure.in b/configure.in
index af717b3126272687b58a5f251ee0581d7b36386f..0ba9bea828fd653dfaa46e7ea0d16260606b6444 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -3625,12 +3625,14 @@ AC_CHECK_FUNC(vsnprintf, [],
 AC_MSG_CHECKING(printf for %z support)
 AC_TRY_RUN([
 #include <stdio.h>
+
+int
 main() {
        size_t j = 0;
        char buf[100];
        buf[0] = 0;
        sprintf(buf, "%zu", j);
-       exit(strcmp(buf, "0") != 0);
+       return ((buf[0] == '0' && buf[1] == '\0') ? 0 : 1);
 }
 ],
        [AC_MSG_RESULT(yes)],