diff options
| author | Toni Uhlig <matzeton@googlemail.com> | 2020-06-22 20:49:58 +0200 |
|---|---|---|
| committer | Toni Uhlig <matzeton@googlemail.com> | 2020-06-23 00:22:33 +0200 |
| commit | 678fbcdfd6e7b87c24e83af0764afa867e0b1832 (patch) | |
| tree | 650eec387961ae486bcace1d9456ed525d242f2b /m4/ax_check_compile_flag.m4 | |
| parent | d9af1562f00d2b9ac9fe5f4e745a84164656fea1 (diff) | |
Allow -fsanitize for LLVM as well as for GCC.
* renamed --with-llvm-sanitizer to --with-sanitizer
* disable all optimisations (-O0) if --with-sanitizer set,
no functions/paramaters/variables will be optimised, improves debugging
* enable undefined behaviour sanitizer (ubsan)
* enable leak sanitizer (lsan)
* check if -fsanitize=fuzzer is available and --enable-fuzztargets set,
fail if not (only supported by clang)
* include level 3 debugging information (-g3), improves macro debugging
* disabled ubsan misaligned pointer access and lshift overflow
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
Diffstat (limited to 'm4/ax_check_compile_flag.m4')
| -rw-r--r-- | m4/ax_check_compile_flag.m4 | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/m4/ax_check_compile_flag.m4 b/m4/ax_check_compile_flag.m4 new file mode 100644 index 000000000..bd753b34d --- /dev/null +++ b/m4/ax_check_compile_flag.m4 @@ -0,0 +1,53 @@ +# =========================================================================== +# https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT]) +# +# DESCRIPTION +# +# Check whether the given FLAG works with the current language's compiler +# or gives an error. (Warnings, however, are ignored) +# +# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on +# success/failure. +# +# If EXTRA-FLAGS is defined, it is added to the current language's default +# flags (e.g. CFLAGS) when the check is done. The check is thus made with +# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to +# force the compiler to issue an error when a bad flag is given. +# +# INPUT gives an alternative input source to AC_COMPILE_IFELSE. +# +# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this +# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG. +# +# LICENSE +# +# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> +# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> +# +# Copying and distribution of this file, with or without modification, are +# permitted in any medium without royalty provided the copyright notice +# and this notice are preserved. This file is offered as-is, without any +# warranty. + +#serial 6 + +AC_DEFUN([AX_CHECK_COMPILE_FLAG], +[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF +AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl +AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [ + ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS + _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1" + AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])], + [AS_VAR_SET(CACHEVAR,[yes])], + [AS_VAR_SET(CACHEVAR,[no])]) + _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags]) +AS_VAR_IF(CACHEVAR,yes, + [m4_default([$2], :)], + [m4_default([$3], :)]) +AS_VAR_POPDEF([CACHEVAR])dnl +])dnl AX_CHECK_COMPILE_FLAGS |