use gnulib to provide the newest implementation of getopt_long()

.gitignore

@@ -27,3 +27,7 @@ m4/lt~obsolete.m4
 src/adplay
 src/config.h*
 src/.libs/
+gnulib/*.a
+gnulib/stddef.h
+gnulib/sys/
+gnulib/unistd.h

Makefile.am

@@ -1,7 +1,7 @@
-SUBDIRS = src doc
+SUBDIRS = gnulib src doc
 
-EXTRA_DIST = adplay.spec adplay.qpg
+EXTRA_DIST = adplay.spec adplay.qpg m4/gnulib/gnulib-cache.m4
 
 AUTOMAKE_OPTIONS = dist-bzip2
 
-ACLOCAL_AMFLAGS=-I m4
+ACLOCAL_AMFLAGS="-Im4" "-Im4/gnulib"

README

@@ -29,7 +29,7 @@ for any reason or you are hacking on the build system, you can run each step
 manually instead of using autoreconf:
 
 libtoolize -c -f --install
-aclocal -I m4
+aclocal -Im4 -Im4/gnulib
 autoheader
 automake -a -c
 autoconf

configure.ac

@@ -1,21 +1,24 @@
 # Tell autoconf we're compiling a C++ program using automake and libtool.
 AC_INIT([adplay],[1.9])
 AC_CONFIG_SRCDIR(src/adplay.cc)
-AC_CONFIG_FILES(Makefile src/Makefile doc/Makefile)
+AC_CONFIG_FILES(Makefile gnulib/Makefile src/Makefile doc/Makefile)
 AC_CANONICAL_TARGET
 AM_INIT_AUTOMAKE
-AC_CONFIG_MACRO_DIRS([m4])
+AC_CONFIG_MACRO_DIRS([m4 m4/gnulib])
 AC_CONFIG_HEADERS([src/config.h])
-LT_INIT
-AC_LANG(C++)
 
 # Check if we got a sane C/C++ compilation environment.
 AC_PROG_INSTALL
 AC_PROG_CC
+gl_EARLY
 AC_PROG_CXX
 AC_PROG_CPP
 AC_PROG_CXXCPP
 
+LT_INIT
+
+AC_LANG(C++)
+
 # Nothing works without these libraries...
 AC_CHECK_LIB(stdc++,main,,AC_MSG_ERROR([libstdc++ not installed]))
 PKG_CHECK_MODULES([adplug], [adplug >= 2.0],,[
@@ -24,10 +27,6 @@ I will try to do the old-style library search for which i cannot check \
 versions. Please bear in mind that i am requiring at least version 1.4.])
 AC_CHECK_LIB(adplug,main,,AC_MSG_ERROR([*** AdPlug not installed ***]))])
 
-# Check if getopt header is installed on this system
-AC_CHECK_HEADERS([getopt.h], ,
-	AC_SUBST(GETOPT_SOURCES, [getopt.c getopt1.c getopt.h]))
-
 # Save compiler flags and set up for compiling test programs
 oldlibs="$LIBS"
 oldcppflags="$CPPFLAGS"
@@ -211,6 +210,8 @@ fi
 
 AC_SUBST([drivers])
 
+gl_INIT
+
 AC_OUTPUT
 
 # Display user informative configuration output

gnulib.txt

@@ -0,0 +1,16 @@
+gnulib is a tool and library that can provide implementation of functionality not available on all operating systems and libc implementations.
+
+Adplug currently uses gnulib to provide getopt_long().
+
+To refresh to the latest version, do the following steps.
+
+* Remove the old instance 
+* clone the gnulib repository outside of the Adplug source tree (In this example it is done in the parent directory)
+* Reimport gnulib
+
+rm -Rf m4/gnulib gnulib
+pushd .
+cd ..
+git clone https://git.savannah.gnu.org/git/gnulib.git
+popd
+../gnulib/gnulib-tool --m4-base m4/gnulib/ --source-base gnulib --no-vc-files --import getopt-gnu