autoconf: remove fuzzing option

Use Cmake for fuzzing.

Makefile.am

 ACLOCAL_AMFLAGS = -I m4
-if AEC_FUZZING
-  FUZZDIR = fuzzing
-endif
-SUBDIRS = src tests $(FUZZDIR)
+SUBDIRS = src tests
 EXTRA_DIST = doc/patent.txt CMakeLists.txt cmake/config.h.in \
 cmake/macros.cmake README.md README.SZIP CHANGELOG.md Copyright.txt data
 

configure.ac

@@ -12,7 +12,6 @@ AM_INIT_AUTOMAKE([foreign])
 AM_MAINTAINER_MODE([enable])
 
 AC_PROG_CC_C99
-AC_PROG_CXX
 
 AC_HEADER_STDC
 
@@ -31,23 +30,5 @@ AC_CHECK_DECLS(__builtin_clzll)
 
 AM_EXTRA_RECURSIVE_TARGETS([bench benc bdec])
 
-AC_ARG_ENABLE([fuzzing],
-  AS_HELP_STRING([--enable-fuzzing], [Enable fuzzing of libaec]))
-
-AS_IF([test "x$enable_fuzzing" = "xyes"], [
-  AX_COMPILER_VENDOR
-  AS_IF([test "x$ax_cv_c_compiler_vendor" = "xclang"], [
-    AC_LANG_PUSH([C++])
-    AX_COMPILER_VENDOR
-    AC_LANG_POP([C++])
-    AS_IF([test "x$ax_cv_cxx_compiler_vendor" = "xclang"], [], [
-      AC_MSG_ERROR([You need to build with Clang as CXX for fuzzing to work])
-    ])
-  ], [
-    AC_MSG_ERROR([You need to build with Clang as CC for fuzzing to work])
-  ])
-])
-AM_CONDITIONAL([AEC_FUZZING], [test x$enable_fuzzing = xyes])
-
-AC_CONFIG_FILES([Makefile src/Makefile tests/Makefile fuzzing/Makefile])
+AC_CONFIG_FILES([Makefile src/Makefile tests/Makefile])
 AC_OUTPUT

fuzzing/Makefile.am

-FUZZING_FLAGS = -g -fsanitize=address \
--fsanitize-coverage=trace-pc-guard,indirect-calls,edge
-noinst_LIBRARIES = libaec_fuzz.a
-libaec_fuzz_a_SOURCES = $(top_srcdir)/src/encode.c \
-$(top_srcdir)/src/encode_accessors.c \
-$(top_srcdir)/src/decode.c \
-$(top_srcdir)/src/encode.h \
-$(top_srcdir)/src/encode_accessors.h \
-$(top_srcdir)/src/decode.h
-libaec_fuzz_a_CFLAGS = $(FUZZING_FLAGS)
-aec_fuzz_SOURCES = fuzz_target.cc
-aec_fuzz_CXXFLAGS = $(FUZZING_FLAGS)
-aec_fuzz_LDFLAGS = -fsanitize=address -lFuzzer
-aec_fuzz_LDADD = libaec_fuzz.a
-noinst_PROGRAMS = aec_fuzz
-EXTRA_DIST = CMakeLists.txt

m4/m4_ax_compiler_vendor.m4

-# ===========================================================================
-#    https://www.gnu.org/software/autoconf-archive/ax_compiler_vendor.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_COMPILER_VENDOR
-#
-# DESCRIPTION
-#
-#   Determine the vendor of the C/C++ compiler, e.g., gnu, intel, ibm, sun,
-#   hp, borland, comeau, dec, cray, kai, lcc, metrowerks, sgi, microsoft,
-#   watcom, etc. The vendor is returned in the cache variable
-#   $ax_cv_c_compiler_vendor for C and $ax_cv_cxx_compiler_vendor for C++.
-#
-# LICENSE
-#
-#   Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
-#   Copyright (c) 2008 Matteo Frigo
-#
-#   This program is free software: you can redistribute it and/or modify it
-#   under the terms of the GNU General Public License as published by the
-#   Free Software Foundation, either version 3 of the License, or (at your
-#   option) any later version.
-#
-#   This program is distributed in the hope that it will be useful, but
-#   WITHOUT ANY WARRANTY; without even the implied warranty of
-#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-#   Public License for more details.
-#
-#   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <https://www.gnu.org/licenses/>.
-#
-#   As a special exception, the respective Autoconf Macro's copyright owner
-#   gives unlimited permission to copy, distribute and modify the configure
-#   scripts that are the output of Autoconf when processing the Macro. You
-#   need not follow the terms of the GNU General Public License when using
-#   or distributing such scripts, even though portions of the text of the
-#   Macro appear in them. The GNU General Public License (GPL) does govern
-#   all other use of the material that constitutes the Autoconf Macro.
-#
-#   This special exception to the GPL applies to versions of the Autoconf
-#   Macro released by the Autoconf Archive. When you make and distribute a
-#   modified version of the Autoconf Macro, you may extend this special
-#   exception to the GPL to apply to your modified version as well.
-
-#serial 16
-
-AC_DEFUN([AX_COMPILER_VENDOR],
-[AC_CACHE_CHECK([for _AC_LANG compiler vendor], ax_cv_[]_AC_LANG_ABBREV[]_compiler_vendor,
-  dnl Please add if possible support to ax_compiler_version.m4
-  [# note: don't check for gcc first since some other compilers define __GNUC__
-  vendors="intel:     __ICC,__ECC,__INTEL_COMPILER
-           ibm:       __xlc__,__xlC__,__IBMC__,__IBMCPP__
-           pathscale: __PATHCC__,__PATHSCALE__
-           clang:     __clang__
-           cray:      _CRAYC
-           fujitsu:   __FUJITSU
-           gnu:       __GNUC__
-           sun:       __SUNPRO_C,__SUNPRO_CC
-           hp:        __HP_cc,__HP_aCC
-           dec:       __DECC,__DECCXX,__DECC_VER,__DECCXX_VER
-           borland:   __BORLANDC__,__CODEGEARC__,__TURBOC__
-           comeau:    __COMO__
-           kai:       __KCC
-           lcc:       __LCC__
-           sgi:       __sgi,sgi
-           microsoft: _MSC_VER
-           metrowerks: __MWERKS__
-           watcom:    __WATCOMC__
-           portland:  __PGI
-	   tcc:       __TINYC__
-           unknown:   UNKNOWN"
-  for ventest in $vendors; do
-    case $ventest in
-      *:) vendor=$ventest; continue ;;
-      *)  vencpp="defined("`echo $ventest | sed 's/,/) || defined(/g'`")" ;;
-    esac
-    AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,[
-      #if !($vencpp)
-        thisisanerror;
-      #endif
-    ])], [break])
-  done
-  ax_cv_[]_AC_LANG_ABBREV[]_compiler_vendor=`echo $vendor | cut -d: -f1`
- ])
-])