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Merge pull request #257 from protobuf-c/edmonds/strict-warnings
Add warning flags to my_CFLAGS
This commit is contained in:
Robert Edmonds
GitHub
commit
56f4709945
26
configure.ac
26
configure.ac
@ -24,6 +24,32 @@ LT_INIT
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AC_CONFIG_HEADERS(config.h)
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AC_CONFIG_FILES([Makefile protobuf-c/libprotobuf-c.pc])
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my_CFLAGS="\
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-Wall \
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-Wchar-subscripts \
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-Wdeclaration-after-statement \
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-Wformat-security \
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-Wmissing-declarations \
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-Wmissing-prototypes \
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-Wnested-externs \
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-Wpointer-arith \
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-Wshadow \
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-Wsign-compare \
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-Wstrict-prototypes \
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-Wtype-limits \
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"
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#AX_CHECK_COMPILE_FLAG(["-Wc90-c99-compat"],
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# [my_CFLAGS="$my_CFLAGS -Wc90-c99-compat"])
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AX_CHECK_COMPILE_FLAG(["-Wc99-c11-compat"],
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[my_CFLAGS="$my_CFLAGS -Wc99-c11-compat"])
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AX_CHECK_COMPILE_FLAG(["-Werror=incompatible-pointer-types"],
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[my_CFLAGS="$my_CFLAGS -Werror=incompatible-pointer-types"])
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AX_CHECK_COMPILE_FLAG(["-Werror=int-conversion"],
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[my_CFLAGS="$my_CFLAGS -Werror=int-conversion"])
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AX_CHECK_COMPILE_FLAG(["-Wnull-dereference"],
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[my_CFLAGS="$my_CFLAGS -Wnull-dereference"])
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AC_SUBST([my_CFLAGS])
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AC_CHECK_PROGS([DOXYGEN], [doxygen])
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AM_CONDITIONAL([HAVE_DOXYGEN],
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[test -n "$DOXYGEN"])
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74
m4/ax_check_compile_flag.m4
Normal file
74
m4/ax_check_compile_flag.m4
Normal file
@ -0,0 +1,74 @@
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# ===========================================================================
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# https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
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#
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# DESCRIPTION
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#
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# Check whether the given FLAG works with the current language's compiler
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# or gives an error. (Warnings, however, are ignored)
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#
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# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
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# success/failure.
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#
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# If EXTRA-FLAGS is defined, it is added to the current language's default
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# flags (e.g. CFLAGS) when the check is done. The check is thus made with
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# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to
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# force the compiler to issue an error when a bad flag is given.
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#
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# INPUT gives an alternative input source to AC_COMPILE_IFELSE.
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#
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# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
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# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
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#
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# LICENSE
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#
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# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
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# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation, either version 3 of the License, or (at your
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# option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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# Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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# As a special exception, the respective Autoconf Macro's copyright owner
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# gives unlimited permission to copy, distribute and modify the configure
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# scripts that are the output of Autoconf when processing the Macro. You
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# need not follow the terms of the GNU General Public License when using
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# or distributing such scripts, even though portions of the text of the
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# Macro appear in them. The GNU General Public License (GPL) does govern
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# all other use of the material that constitutes the Autoconf Macro.
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#
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# This special exception to the GPL applies to versions of the Autoconf
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# Macro released by the Autoconf Archive. When you make and distribute a
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# modified version of the Autoconf Macro, you may extend this special
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# exception to the GPL to apply to your modified version as well.
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#serial 5
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AC_DEFUN([AX_CHECK_COMPILE_FLAG],
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[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
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AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
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AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
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ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
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_AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
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AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
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[AS_VAR_SET(CACHEVAR,[yes])],
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[AS_VAR_SET(CACHEVAR,[no])])
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_AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
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AS_VAR_IF(CACHEVAR,yes,
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[m4_default([$2], :)],
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[m4_default([$3], :)])
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AS_VAR_POPDEF([CACHEVAR])dnl
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])dnl AX_CHECK_COMPILE_FLAGS
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@ -3213,7 +3213,6 @@ protobuf_c_message_unpack(const ProtobufCMessageDescriptor *desc,
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unsigned max = (i_slab == which_slab) ?
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in_slab_index : (1UL << (i_slab + 4));
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ScannedMember *slab = scanned_member_slabs[i_slab];
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unsigned j;
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for (j = 0; j < max; j++) {
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if (!parse_member(slab + j, rv, allocator)) {
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