Use autoconf/automake to configure and make ppp

This change brings in autoconf/automake scripts to configure the ppp project. Current change doesn't eliminate the previous build system, but the new script autogen.sh will overwrite configure, and generate the basic Makefile.in and Makefile files.

Features can now be enabled by command line:

  * Microsoft Extensions,
    - MSCHAP
    - MPPE
    - MS LAN Manager support
  * IPXCP protocol
  * CBCP protocol
  * PAM support
  * EAP-TLS support
  * EAP-SRP support
  * Max session lifetime by byte count
  * Plugins
  * Packet activity filter support
  * Multilink
  * IPv6 support

Control linkage with
  * OpenSSL (-lssl -lcrypto)
  * systemd (-lsystemd)
  * libatm (-latm)
  * libsrp (-lsrp)
  * pam (-lpam)

Also, the configure script is made sensitive to features of OpenSSL. Like the presence or absence of DES, SHA, MD4 and MD5 crypto support. In the cases where either of these are missing, the support will be directly compiled into pppd and plugins.

In addition, package maintainers can now control the installation paths with standard --prefix=, or --localstatedir=, or --sysconfdir= to configure. On top of that, they can now control the following directories:
  * runtime directory w/--with-runtime-dir
  * logfile directory w/--with-logfile-dir
  * plugin directory w/--with-plugin-dir

In the case where automake isn't the right solution, namely: SunOS kernel module build, the original Makefile infrastructure is preserved and reused.

Care was taken to only cosmetically touchup the source files in this change. This means:
  * Insert HAVE_CONFIG_H and include config.h in all .c files.
  * Change HAS_SHADOW to HAVE_SHADOW_H
  * Change HAVE_LOGWTMP to HAVE_UTMP_H
  * Introduce HAVE_CRYPT_H into the source code where appropriate
  * Added ifdef MPPE where appropriate
  * USE_SRP required a few changes as it didn't compile
  * Touchup some compile warning in pppstats directory on SunOS

Introduced a new pppdconf.h file that exports the appropriate defines to a module that wants to provide a module that pppd can dynamically load. This will define/undef features like MPPE, CHAPMS such that the project doesn't have to guess what features pppd is compiled with.

Signed-off-by: Eivind Næss <[email protected]>

Author: enaess

.github/workflows/solaris.yaml

@@ -12,6 +12,6 @@ jobs:
       with:
         run: |
           pkg update
-          pkg install gcc
-          ./configure
+          pkg install gcc automake autoconf libtool
+          ./autogen.sh CFLAGS="-Wno-deprecated-declarations"
           make

.github/workflows/ubuntu.yaml

@@ -0,0 +1,24 @@
+name: Build and Test
+on: [push, pull_request]
+
+jobs:
+  build_and_test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: install required packages
+      run: sudo DEBIAN_FRONTEND=noninteractive apt-get -y -qq install build-essential autoconf automake pkg-config libtool m4 autoconf-archive libssl-dev libatm1-dev libpcap-dev
+
+    - name: configure
+      run: ./autogen.sh --enable-multilink --enable-ipxcp
+
+    - name: build
+      run: make V=1 CFLAGS="-O2 -g -Wno-unused-result"
+
+    - name: check
+      run: make check
+
+    - name: distcheck
+      run: make distcheck DISTCHECK_CONFIGURE_FLAGS="--enable-multilink --enable-ipxcp"

AUTHORS

@@ -0,0 +1,7 @@
+The pppd Project
+https://github.com/ppp-project/ppp
+
+Primary Author of this package:
+Linux			Paul Mackerras <[email protected]>
+Solaris			James Carlson <[email protected]>
+

COPYING

@@ -0,0 +1,7 @@
+Copyrights:
+***********
+
+All of the code can be freely used and redistributed.  The individual
+source files each have their own copyright and permission notice.
+Pppd, pppstats and pppdump are under BSD-style notices.  Some of the
+pppd plugins are GPL'd.  Chat is public domain.

ChangeLog

@@ -0,0 +1,4 @@
+2021-07-11  Eivind Naess <[email protected]>
+
+	Introduction of Autotools to pppd project
+

Makefile.am

@@ -0,0 +1,77 @@
+ACLOCAL_AMFLAGS="-Im4"
+
+SUBDIRS = chat contrib pppd pppstats pppdump
+
+if WITH_PLUGINS
+SUBDIRS += pppd/plugins
+endif
+
+DIST_SUBDIRS = $(SUBDIRS) common include modules scripts
+
+#
+# *HACK*
+#   This is to work around the kernel module for PPP on Sun Solaris
+if SUNOS
+all-am:
+	(cd solaris ; make -f Makefile)
+
+clean-generic:
+	(cd solaris ; make -f Makefile clean)
+
+install-am:
+	(cd solaris ; make -f Makefile install)
+endif
+
+sampledir = $(sysconfdir)/@PACKAGE@
+
+sample_DATA = \
+    etc.ppp/options \
+    etc.ppp/chap-secrets \
+    etc.ppp/pap-secrets \
+    etc.ppp/eaptls-server \
+    etc.ppp/eaptls-client \
+    etc.ppp/openssl.cnf
+
+EXTRA_README = \
+    Changes-2.3 \
+    FAQ \
+    README \
+    README.cbcp \
+    README.eap-srp \
+    README.eap-tls \
+    README.linux \
+    README.MPPE \
+    README.MSCHAP80 \
+    README.MSCHAP81 \
+    README.pppoe \
+    README.pppol2tp \
+    README.pwfd \
+    README.sol2 \
+    PLUGINS \
+    SETUP \
+    Submitting-patches.md
+
+EXTRA_SOLARIS = \
+    solaris/Makedefs \
+    solaris/Makedefs.gcc \
+    solaris/Makedefs.sol2 \
+    solaris/Makefile.sol2 \
+    solaris/Makefile.sol2-64 \
+    solaris/Makefile.sol2-64x \
+    solaris/Makefile.sol2gcc \
+    solaris/Makefile.sol2gcc-64 \
+    solaris/Makefile.sol2gcc-64x \
+    solaris/Makefile.top \
+    solaris/ppp_ahdlc.c \
+    solaris/ppp_ahdlc_mod.c \
+    solaris/ppp.c \
+    solaris/ppp_comp.c \
+    solaris/ppp_comp_mod.c \
+    solaris/ppp.conf \
+    solaris/ppp_mod.c \
+    solaris/ppp_mod.h
+
+EXTRA_DIST= \
+    $(sample_DATA) \
+    $(EXTRA_README) \
+    $(EXTRA_SOLARIS)