Replaced obsolete autoconf and automake macros

This patch cleans up a number of obsolete constructs in the build
system, these include:
- Replacing AC_TRY_RUN with AC_RUN_IFELSE for the SOCK_CLOEXEC test
- Using AC_CONFIG_HEADERS instead of AM_CONFIG_HEADER
- Using LT_INIT with the win32-dll parameter instead of the obsolete
  AC_PROG_LIBTOOL and AC_LIBTOOL_WIN32_DLL macros
- Removing the unused and obsolete AC_TYPE_SIGNAL check
- Removing the unused alloca.h header check
- Replacing the deprecated INCLUDES macro with AM_CPPFLAGS

Signed-off-by: Gabriele Svelto <gabriele.svelto@gmail.com>

4 files changed, 19 insertions, 21 deletions

diff --git a/acinclude.m4 b/acinclude.m4
index e1429e5..51a3d5c 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -581,13 +581,15 @@ AC_DEFUN([LIBXS_CHECK_LANG_VISIBILITY], [{
           [AC_MSG_RESULT(yes) ; $1], [AC_MSG_RESULT(no) ; $2])
 }])
 
-dnl ################################################################################
-dnl # LIBXS_CHECK_SOCK_CLOEXEC([action-if-found], [action-if-not-found])           #
-dnl # Check if SOCK_CLOEXEC is supported                                           #
-dnl ################################################################################
-AC_DEFUN([LIBXS_CHECK_SOCK_CLOEXEC], [{
-    AC_MSG_CHECKING(whether SOCK_CLOEXEC is supported)
-    AC_TRY_RUN([/* SOCK_CLOEXEC test */
+###############################################################################
+# LIBXS_CHECK_SOCK_CLOEXEC([action-if-found], [action-if-not-found])          #
+# Check if SOCK_CLOEXEC is supported                                          #
+###############################################################################
+
+AC_DEFUN([LIBXS_CHECK_SOCK_CLOEXEC], [
+    AC_MSG_CHECKING([whether SOCK_CLOEXEC is supported])
+    AC_RUN_IFELSE([AC_LANG_SOURCE([[
+/* SOCK_CLOEXEC test */
 #include <sys/types.h>
 #include <sys/socket.h>
 
@@ -595,13 +597,11 @@ int main (int argc, char *argv [])
 {
     int s = socket (PF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0);
     return (s == -1);
-}
-    ],
+}        ]])],
     [AC_MSG_RESULT(yes) ; libxs_cv_sock_cloexec="yes" ; $1],
     [AC_MSG_RESULT(no)  ; libxs_cv_sock_cloexec="no"  ; $2],
-    [AC_MSG_RESULT(not during cross-compile) ; libxs_cv_sock_cloexec="no"]
-    )
-}])
+    [AC_MSG_RESULT(not during cross-compile) ; libxs_cv_sock_cloexec="no"])
+])
 
 ###############################################################################
 # LIBXS_CHECK_KQUEUE                                                          #
diff --git a/configure.ac b/configure.ac
index b602df5..decbd6c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -11,7 +11,7 @@ AC_INIT([libxs], [m4_esyscmd([./version.sh])],
 
 AC_CONFIG_AUX_DIR([config])
 AC_CONFIG_MACRO_DIR([m4])
-AM_CONFIG_HEADER([src/platform.hpp])
+AC_CONFIG_HEADERS([src/platform.hpp])
 AM_INIT_AUTOMAKE([tar-ustar dist-zip foreign])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
@@ -56,8 +56,7 @@ AC_PATH_PROG([XMLTO], [xmlto])
 AC_ARG_VAR([ASCIIDOC], [Path to asciidoc command])
 AC_PATH_PROG([ASCIIDOC], [asciidoc])
 LIBXS_CONFIG_LIBTOOL
-AC_LIBTOOL_WIN32_DLL
-AC_PROG_LIBTOOL
+LT_INIT([win32-dll])
 
 # Check whether to build a with debug symbols
 LIBXS_CHECK_ENABLE_DEBUG
@@ -459,7 +458,6 @@ AM_CONDITIONAL([BUILD_PGM], [test "x$libxs_pgm_ext" = "xyes"])
 AM_CONDITIONAL([ON_MINGW], [test "x$libxs_on_mingw32" = "xyes"])
 
 # Checks for library functions.
-AC_TYPE_SIGNAL
 AC_CHECK_FUNCS([ \
     perror \
     gettimeofday \
@@ -469,7 +467,7 @@ AC_CHECK_FUNCS([ \
     getifaddrs \
     freeifaddrs
 ])
-AC_CHECK_HEADERS([alloca.h])
+
 LIBXS_CHECK_SOCK_CLOEXEC([
     AC_DEFINE([XS_HAVE_SOCK_CLOEXEC], [1],
         [Whether SOCK_CLOEXEC is defined and functioning.])
diff --git a/perf/Makefile.am b/perf/Makefile.am
index 3a4f629..3705488 100644
--- a/perf/Makefile.am
+++ b/perf/Makefile.am
@@ -1,5 +1,5 @@
-INCLUDES = -I$(top_builddir)/include \
-           -I$(top_srcdir)/include
+AM_CPPFLAGS = -I$(top_builddir)/include \
+              -I$(top_srcdir)/include
 
 noinst_PROGRAMS = local_lat remote_lat local_thr remote_thr inproc_lat inproc_thr
 
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 47a880b..4e08ae7 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,5 +1,5 @@
-INCLUDES = -I$(top_builddir)/include \
-           -I$(top_srcdir)/include
+AM_CPPFLAGS = -I$(top_builddir)/include \
+              -I$(top_srcdir)/include
 
 LDADD = $(top_builddir)/src/libxs.la