[systemd-commits] configure.ac

[David Herrmann]

 configure.ac |    1 +
 1 file changed, 1 insertion(+)

New commits:
commit 0a98d66159e474915afd6597d3aa444a698fdd2d
Author: David Herrmann <dh.herrmann at gmail.com>
Date:   Tue Feb 24 15:59:06 2015 +0100

    build: add -Wno-format-signedness
    
    gcc5 introduced this option (gcc4 silently ignores it, which is fine).
    Given that gcc5 thinks 'unsigned char'/'unsigned short' is promoted to
    'int' for var-args, stuff like this spits out warnings:
        uint8_t x;
        printf("%" PRIu8", x);
    
    gcc5 promots 'x' to 'int', instead of 'unsigned int' and thus gets a
    signedness-warnings as it expects an 'unsigned int'.
    
    glibc states otherwise: unsigneds are always promoted to 'unsigned int'.
    Until gcc and glibc figure this out, lets just ignore that warning (which
    is totally useless in its current form).

diff --git a/configure.ac b/configure.ac
index 9a2235b..22a6f17 100644
--- a/configure.ac
+++ b/configure.ac
@@ -186,6 +186,7 @@ CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
         -Wno-unused-parameter \
         -Wno-missing-field-initializers \
         -Wno-unused-result \
+        -Wno-format-signedness \
         -Werror=overflow \
         -Wdate-time \
         -Wnested-externs \