configure.ac

AC_INIT([tfs], [0.1.0-prerelease])
AM_INIT_AUTOMAKE([foreign subdir-objects])
AM_SILENT_RULES([yes])

LT_INIT([disable-static])

AC_PROG_CC

AC_ARG_ENABLE([fuzz-testing], AS_HELP_STRING([--enable-fuzz-testing], ["Enable fuzz testing (requires Clang 6 or later)"]), [
   AC_MSG_CHECKING([whether $CC accepts -fsanitize=fuzzer])
   tmp_saved_flags=$[]_AC_LANG_PREFIX[]FLAGS
   _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS -fsanitize=fuzzer"
   AC_LINK_IFELSE([AC_LANG_PROGRAM()],
       [
        AC_MSG_RESULT(yes)
        SANITIZERS="-fsanitize=fuzzer"
        fuzzer=yes],
        AC_MSG_RESULT(no)
       AC_MSG_FAILURE([-fsanitize=fuzzer not supported (Required with --enable-fuzz-testing)]))
   _AC_LANG_PREFIX[]FLAGS=$tmp_saved_flags
], [SANITIZERS=""
    fuzzer=no])
AM_CONDITIONAL([FUZZER_ENABLED], test "x$fuzzer" = "xyes")
AC_SUBST([SANITIZERS])

EXTRA_WARNINGS="-Wno-tautological-constant-out-of-range-compare"
AC_SUBST([EXTRA_WARNINGS])

AC_ARG_VAR([RAGEL], [Ragel generator command])
AC_ARG_VAR([RAGELFLAGS], [Ragel generator flags])
AC_PATH_PROG([RAGEL], [ragel], [true])
AM_CONDITIONAL([HAVE_RAGEL], test "$RAGEL" != "true")

AC_OUTPUT([Makefile])

AC_MSG_RESULT([
Configuration:

C compiler: $CC
CFLAGS: $CFLAGS

Host: $host
Extra warnings: $EXTRA_WARNINGS
Extra libs: $EXTRA_LIBS
Extra ld flags: $EXTRA_LDFLAGS

Ragel: $RAGEL
Ragel flags: $RAGELFLAGS])