From: Philippe Waroquiers <philippe.waroquiers@skynet.be>
Date: Sat, 17 Aug 2019 16:27:22 +0000 (+0200)
Subject: Fix compilation problem when __NR_preadv2 __NR_pwritev2 are undefined
X-Git-Tag: VALGRIND_3_16_0~233
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4b39d3343762c53419cf16118c74e0004f900e32;p=thirdparty%2Fvalgrind.git

Fix compilation problem when __NR_preadv2 __NR_pwritev2 are undefined

check_preadv2_pwritev2.c: In function ‘main’:
check_preadv2_pwritev2.c:12:12: error: ‘__NR_preadv2’ undeclared (first use in this function)
    syscall(__NR_preadv2, 0, NULL, 0, 0, 0);
            ^
check_preadv2_pwritev2.c:12:12: note: each undeclared identifier is reported only once for each function it appears in
check_preadv2_pwritev2.c:15:12: error: ‘__NR_pwritev2’ undeclared (first use in this function)
    syscall(__NR_pwritev2, 0, NULL, 0, 0, 0);
---

diff --git a/memcheck/tests/linux/check_preadv2_pwritev2.c b/memcheck/tests/linux/check_preadv2_pwritev2.c
index 5333679e9d..a91caa6426 100644
--- a/memcheck/tests/linux/check_preadv2_pwritev2.c
+++ b/memcheck/tests/linux/check_preadv2_pwritev2.c
@@ -5,15 +5,23 @@
 
 int main(int argc, char **argv)
 {
-   errno = 0;
    int has_preadv2 = 0;
    int has_pwritev2 = 0;
-
+#if defined(__NR_preadv2)
+   errno = 0;
    syscall(__NR_preadv2, 0, NULL, 0, 0, 0);
    has_preadv2 = errno != ENOSYS;
+#else
+   has_preadv2 = 0;
+#endif
 
+#if defined(__NR_pwritev2)
+   errno = 0;
    syscall(__NR_pwritev2, 0, NULL, 0, 0, 0);
    has_pwritev2 = errno != ENOSYS;
+#else
+   has_pwritev2 = 0;
+#endif
 
    return !(has_preadv2 && has_pwritev2);
 }