Update autotools

Makefile.am

-SUBDIRS = src tests
-ACLOCAL_AMFLAGS = -I m4
+SUBDIRS = src . tests
+#ACLOCAL_AMFLAGS = -I m4

configure.ac

 AC_PREREQ([2.69])
 AC_INIT([ttail], [0.0.1], [yann.weber@member.fsf.org])
 
-#AC_CONFIG_SRCDIR([src/ttail.c])
+AC_CONFIG_HEADERS([src/include/config.h])
+AC_CONFIG_SRCDIR([src/ttail.c])
 AC_CONFIG_MACRO_DIR([m4])
 
 # Checks for programs.
+AC_GNU_SOURCE
 AC_PROG_CC
 AM_PROG_CC_C_O 
 AC_PROG_MAKE_SET
+AC_PROG_RANLIB
 
 # Checks for libraries.
 AC_SEARCH_LIBS([dlopen], [dl dld], [], [
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_TYPE_SIZE_T
-
+#CFLAGS="$CFLAGS -I$(top_builddir)/src/include/"
 # Checks for library functions.
 AC_FUNC_MALLOC
 AC_FUNC_REALLOC
 
-AC_ARG_ENABLE([fmt_regex],
-	AS_HELP_STRING([--disable-fmt-regex], [Disable regex format detection]))
-
-AS_IF([test "x$enable_fmt_regex" != "xno"], [
-	AC_DEFINE([TTAIL_FMT_REGEX], [1],
-		[define if using regex format])
-	AC_SUBST([WANT_LIBFMT_REGEX],[1])
+AC_ARG_ENABLE([debug],[  --enable-debug turn on debugging],
+[case "${enableval}" in
+	yes) debug=true ;;
+	no)  debug=false ;;
+	*) AC_MSG_ERROR([bad value ${enableval} for --enable-debug]) ;;
+esac],[debug=false])
+AM_CONDITIONAL([DEBUG], [test x$debug = xtrue])
+
+AS_IF([test x$debug = xtrue], [
+	AX_CHECK_CFLAGS([-Wall])
+	AX_CHECK_CFLAGS([-g])
+	AX_CHECK_CFLAGS([-ggdb])
+	AX_CHECK_CFLAGS([-O0])
+],
+[
+	AX_CHECK_CFLAGS([-O2])
+	AX_CHECK_CFLAGS([-std=c99 -pedantic])
+	AX_CHECK_CFLAGS([-ansi])
+	AX_CHECK_CFLAGS([-Wall -Werror])
+	AX_CHECK_CFLAGS([-fgnu89-inline])
 ])
+AX_CHECK_CFLAGS([-D_XOPEN_SOURCE -D_GNU_SOURCE])
 
 AM_INIT_AUTOMAKE
 
-AM_CONDITIONAL([WANT_LIBFMT_REGEX], [test "x$enable_fmt_regex" != "xno"])
-
 AC_CONFIG_FILES([Makefile
 		src/Makefile
 		tests/Makefile])
-AC_CONFIG_HEADERS([src/include/config.h])
 
 AC_OUTPUT

m4/ax_check_cflags.m4

+# AX_CHECK_CFLAGS(ADDITIONAL-CFLAGS, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
+#
+# checks whether the $(CC) compiler accepts the ADDITIONAL-CFLAGS
+# if so, they are added to the CXXFLAGS
+AC_DEFUN([AX_CHECK_CFLAGS],
+[
+	AC_MSG_CHECKING([whether compiler accepts "$1"])
+	echo "int main(int argc, char** argv){ return 0; }" > conftest.c
+	if $CC $CFLAGS -o conftest.o conftest.c [$1] > /dev/null 2>&1
+	then
+	AC_MSG_RESULT([yes])
+	CFLAGS="${CFLAGS} [$1]"
+	[$2]
+	else
+	AC_MSG_RESULT([no])
+	[$3]
+	fi
+])dnl AX_CHECK_CFLAGS

src/Makefile.am

 bin_PROGRAMS = ttail
+noinst_LIBRARIES=libttail.a
 
-
-ttail_SOURCES = ttail.c dateformats.c options.c
-if WANT_LIBFMT_REGEX
-ttail_SOURCES += fmt_regex.c
-endif
-ttail_CFLAGS = -std=c99 -Wall -Werror -D_XOPEN_SOURCE -D_GNU_SOURCE -I$(top_srcdir)/src/include
+libttail_a_SOURCES = ttail.c
+ttail_SOURCES = main.c ttail.c
+#ttail_CFLAGS = @CFLAGS@