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| author | Mark Wielaard <mark@klomp.org> | 2023-02-21 13:12:38 +0100 |
|---|---|---|
| committer | Mark Wielaard <mark@klomp.org> | 2023-02-21 13:12:38 +0100 |
| commit | c9c055a6949702af57e46f4eac3355d4a4f94c5d (patch) | |
| tree | c3abb1ef850c9515c1f7749528e70adfc3644a44 | |
| parent | eb79a7bd87adc51dae77eb8d5ec37ad58ec71feb (diff) | |
| download | elfutils-c9c055a6949702af57e46f4eac3355d4a4f94c5d.tar.gz | |
configure: Check for and -Wuse-after-free=3 when available
gcc already includes -Wuse-after-free=2 in -Wall. -Wuse-after-free=3
also warns for indeterminate pointers in equality expressions.
Signed-off-by: Mark Wielaard <mark@klomp.org>
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | config/ChangeLog | 5 | ||||
| -rw-r--r-- | config/eu.am | 8 | ||||
| -rw-r--r-- | configure.ac | 11 |
4 files changed, 27 insertions, 1 deletions
@@ -1,3 +1,7 @@ +2023-02-21 Mark Wielaard <mark@klomp.org> + + * configure.ac: Check for -Wuse-after-free=3 + 2023-02-15 Mark Wielaard <mark@klomp.org> * configure.ac: Error out when demangler is enabled, but diff --git a/config/ChangeLog b/config/ChangeLog index c63caa0c..ce1f74f6 100644 --- a/config/ChangeLog +++ b/config/ChangeLog @@ -1,3 +1,8 @@ +2023-02-21 Mark Wielaard <mark@klomp.org> + + * eu.am (USE_AFTER_FREE3_WARNING): Define. + (AM_CFLAGS): Use USE_AFTER_FREE3_WARNING. + 2022-10-02 Mark Wielaard <mark@klomp.org> * elfutils.spec.in: Update for 0.188. diff --git a/config/eu.am b/config/eu.am index c3cefe7e..e6c241f9 100644 --- a/config/eu.am +++ b/config/eu.am @@ -1,6 +1,7 @@ ## Common automake fragments for elfutils subdirectory makefiles. ## ## Copyright (C) 2010, 2014, 2016 Red Hat, Inc. +## Copyright (C) 2023, Mark J. Wielaard <mark@klomp.org> ## ## This file is part of elfutils. ## @@ -87,10 +88,17 @@ else NO_PACKED_NOT_ALIGNED_WARNING= endif +if HAVE_USE_AFTER_FREE3_WARNING +USE_AFTER_FREE3_WARNING=-Wuse-after-free=3 +else +USE_AFTER_FREE3_WARNING= +endif + AM_CFLAGS = -std=gnu99 -Wall -Wshadow -Wformat=2 \ -Wold-style-definition -Wstrict-prototypes $(TRAMPOLINES_WARNING) \ $(LOGICAL_OP_WARNING) $(DUPLICATED_COND_WARNING) \ $(NULL_DEREFERENCE_WARNING) $(IMPLICIT_FALLTHROUGH_WARNING) \ + $(USE_AFTER_FREE3_WARNING) \ $(if $($(*F)_no_Werror),,-Werror) \ $(if $($(*F)_no_Wunused),,-Wunused -Wextra) \ $(if $($(*F)_no_Wstack_usage),,$(STACK_USAGE_WARNING)) \ diff --git a/configure.ac b/configure.ac index 4c8a4c31..142a89f6 100644 --- a/configure.ac +++ b/configure.ac @@ -2,7 +2,7 @@ dnl Process this file with autoconf to produce a configure script. dnl Configure input file for elfutils. -*-autoconf-*- dnl dnl Copyright (C) 1996-2019 Red Hat, Inc. -dnl Copyright (C) 2022 Mark J. Wielaard <mark@klomp.org> +dnl Copyright (C) 2022, 2023 Mark J. Wielaard <mark@klomp.org> dnl dnl This file is part of elfutils. dnl @@ -618,6 +618,15 @@ CFLAGS="$old_CFLAGS"]) AM_CONDITIONAL(HAVE_NO_PACKED_NOT_ALIGNED_WARNING, [test "x$ac_cv_no_packed_not_aligned" != "xno"]) +AC_CACHE_CHECK([whether the compiler accepts -Wuse-after-free=3], ac_cv_use_after_free3, [dnl +old_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -Wuse-after-free=3 -Werror" +AC_COMPILE_IFELSE([AC_LANG_SOURCE([])], + ac_cv_use_after_free3=yes, ac_cv_use_after_free3=no) +CFLAGS="$old_CFLAGS"]) +AM_CONDITIONAL(HAVE_USE_AFTER_FREE3_WARNING, + [test "x$ac_cv_use_after_free3" != "xno"]) + AC_CACHE_CHECK([whether the compiler accepts -fno-addrsig], ac_cv_fno_addrsig, [dnl old_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -fno-addrsig -Werror" |