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build: work around broken Debian GCC 8.3

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Not sure what is going on here, Gentoo's 8.4 and 7.5 are both fine so
I'm gonna call it Debian's mess-up.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
This commit is contained in:
David Lamparter 2025-01-27 22:19:24 +01:00
parent 62a0678359
commit ca2a57a67d
1 changed files with 11 additions and 0 deletions
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11
configure.ac
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@ -448,6 +448,17 @@ AH_VERBATIM([OpenBSD], [
#endif
])
dnl Debian 8.3.0-6 has a broken -Wdiscarded-qualifiers
dnl Gentoo 7.5.0 and 8.4.0 are both fine, so either it's gcc 8.3 or Debian's
dnl meddling. I'm guessing the latter. (2025-01-27 equinox)
AC_MSG_CHECKING([whether $CC is a broken Debian GCC 8.3])
if $CC -v 2>&1 | grep -q -E '^gcc.*Debian 8\.3\.'; then
AC_MSG_RESULT([yes])
CFLAGS="$CFLAGS -Wno-discarded-qualifiers"
else
AC_MSG_RESULT([no])
fi
dnl always want these CFLAGS
AC_C_FLAG([-fms-extensions], [
AC_MSG_ERROR([$CC does not support unnamed struct fields (-fms-extensions)])