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build: disable -Wformat-truncation warning

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The warning seems questionable and overly strict.
For now, just disable it to allow building with gcc7.

    src/systemd/src/basic/time-util.c: In function ‘format_timespan’:
    src/systemd/src/basic/time-util.c:509:46: error: ‘%0*lu’ directive output between 1 and 2147483648 bytes may cause result to exceed ‘INT_MAX’ [-Werror=format-truncation=]
                                                  "%s"USEC_FMT".%0*"PRI_USEC"%s",
                                                  ^~~~
    src/systemd/src/basic/time-util.c:509:60: note: format string is defined here
                                                  "%s"USEC_FMT".%0*"PRI_USEC"%s",
    src/systemd/src/basic/time-util.c:509:46: note: directive argument in the range [0, 18446744073709551614]
                                                  "%s"USEC_FMT".%0*"PRI_USEC"%s",
                                                  ^~~~

https://mail.gnome.org/archives/networkmanager-list/2017-February/msg00001.html
This commit is contained in:
Thomas Haller 2017-02-06 14:52:51 +01:00
parent 4b9cebd8ad
commit 705e63a292
1 changed files with 1 additions and 0 deletions
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1
m4/compiler_options.m4
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@ -82,6 +82,7 @@ if test "$GCC" = "yes" -a "$set_more_warnings" != "no"; then
-Wformat-nonliteral \
-Wmissing-include-dirs \
-Wno-pragmas \
-Wno-format-truncation \
; do
dnl GCC 4.4 does not warn when checking for -Wno-* flags (https://gcc.gnu.org/wiki/FAQ#wnowarning)
_NM_COMPILER_FLAG([$(printf '%s' "$option" | sed 's/^-Wno-/-W/')], [],