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Add -Wold-style-definition and -Wdeclaration-after-statement to the list 

of warnings we enable by default; we'll move them if they break any
builds in non-fixable ways.

Add -Wmissing-prototypes and -Wmissing-declarations to the list of
things we don't enable by default, and explain why those, and
-Wstrict-prototypes can't be used.

Also explain why we check for clang before checking whether we can
enable -fexcess-precision=fast.

svn path=/trunk/; revision=37219
This commit is contained in:
Guy Harris 2011-05-17 22:24:26 +00:00
parent 747a964aef
commit e902f33d18
1 changed files with 17 additions and 2 deletions
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19
configure.in
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@ -329,7 +329,6 @@ AC_ARG_ENABLE(extra-gcc-checks,
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Waddress)
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Warray-bounds)
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Wattributes)
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Wdeclaration-after-statement)
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Wdiv-by-zero)
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Wformat-security)
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Wignored-qualifiers)
@ -343,7 +342,14 @@ AC_ARG_ENABLE(extra-gcc-checks,
# for now.
#
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Wwrite-strings)
#
# GLib blocks this for now.
#
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Wstrict-prototypes)
#
# All the registration functions block these for now.
#
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Wmissing-prototypes)
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Wmissing-declarations)
#
# epan/dissectors/packet-afs.c blocks this one for now.
@ -364,7 +370,16 @@ AC_WIRESHARK_GCC_CFLAGS_CHECK(-Wno-pointer-sign)
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Warray-bounds)
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Wcast-align)
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Wformat-security)
# Use the faster pre gcc 4.5 floating point precision
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Wold-style-definition)
AC_WIRESHARK_GCC_CFLAGS_CHECK(-Wdeclaration-after-statement)
#
# Use the faster pre gcc 4.5 floating point precision if available;
# clang doesn't error out on -f options that it doesn't know about,
# it just warns and ignores them, so this check doesn't cause us
# to omit -fexcess-precision=fast, which produces a pile of
# annoying warnings.
#
if test "x$CC" != "xclang" ; then
AC_WIRESHARK_GCC_CFLAGS_CHECK(-fexcess-precision=fast)
fi