build: integrate plugins build into core build

index 4592727..c1fa12e 100644
@@ -194,6 +194,27 @@ AC_ARG_ENABLE(
 )
 
 AC_ARG_ENABLE(
+	[plugin-auth-pam],
+	[AS_HELP_STRING([--disable-plugin-auth-pam], [disable auth-pam plugin @<:@default=yes@:>@])],
+	,
+	[enable_plugin_auth_pam="yes"]
+)
+
+AC_ARG_ENABLE(
+	[plugin-down-root],
+	[AS_HELP_STRING([--disable-plugin-down-root], [disable down-root plugin @<:@default=yes@:>@])],
+	,
+	[enable_plugin_down_root="yes"]
+)
+
+AC_ARG_ENABLE(
+	[pam-dlopen],
+	[AS_HELP_STRING([--enable-pam-dlopen], [dlopen libpam @<:@default=no@:>@])],
+	,
+	[enable_pam_dlopen="no"]
+)
+
+AC_ARG_ENABLE(
 	[strict],
 	[AS_HELP_STRING([--enable-strict], [enable strict compiler warnings (debugging option) @<:@default=no@:>@])],
 	,

@@ -258,6 +279,14 @@ AC_ARG_WITH(
 	[with_crypto_library="openssl"]
 )
 
+AC_ARG_WITH(
+	[plugindir],
+	[AS_HELP_STRING([--with-plugindir], [plugin directory @<:@default=LIBDIR/openvpn@:>@])],
+	,
+	[with_plugindir="\$(libdir)/openvpn/plugins"]
+)
+
+
 AC_DEFINE_UNQUOTED([TARGET_ALIAS], ["${host}"], [A string representing our host])
 case "$host" in
 	*-*-linux*)

@@ -622,6 +651,16 @@ AC_CHECK_LIB(
 )
 AC_SUBST([SELINUX_LIBS])
 
+AC_ARG_VAR([LIBPAM_CFLAGS], [C compiler flags for libpam])
+AC_ARG_VAR([LIBPAM_LIBS], [linker flags for libpam])
+if test -z "${LIBPAM_LIBS}"; then
+	AC_CHECK_LIB(
+		[pam],
+		[pam_start],
+		[LIBPAM_LIBS="-lpam"]
+	)
+fi
+
 case "${with_mem_check}" in
 	valgrind)
 		AC_CHECK_HEADER(

@@ -871,6 +910,9 @@ if test "${enable_plugins}" = "yes"; then
 	OPTIONAL_DL_LIBS="${DL_LIBS}"
 	AC_DEFINE([ENABLE_PLUGIN], [1], [Enable systemd support])
 	test "${enable_eurephia}" = "yes" && AC_DEFINE([ENABLE_EUREPHIA], [1], [Enable support for the eurephia plug-in])
+else
+	enable_plugin_auth_pam="no"
+	enable_plugin_down_root="no"
 fi
 
 if test "${enable_iproute2}" = "yes"; then

@@ -922,6 +964,17 @@ if test "${WIN32}" = "yes"; then
 	test -z "${MAN2HTML}" && AC_MSG_ERROR([man2html is required for win32])
 fi
 
+if test "${enable_plugin_auth_pam}" = "yes"; then
+	PLUGIN_AUTH_PAM_CFLAGS="${LIBPAM_CFLAGS}"
+	if test "${enable_pam_dlopen}" = "yes"; then
+		AC_DEFINE([USE_PAM_DLOPEN], [1], [dlopen libpam])
+		PLUGIN_AUTH_PAM_LIBS="${DL_LIBS}"
+	else
+		test -z "${LIBPAM_LIBS}" && AC_MSG_ERROR([libpam required but missing])
+		PLUGIN_AUTH_PAM_LIBS="${LIBPAM_LIBS}"
+	fi
+fi
+
 CONFIGURE_DEFINES="`set | grep '^enable_.*=' ; set | grep '^with_.*='`"
 AC_DEFINE_UNQUOTED([CONFIGURE_DEFINES], ["`echo ${CONFIGURE_DEFINES}`"], [Configuration settings])
 

@@ -944,10 +997,17 @@ AC_SUBST([OPTIONAL_LZO_LIBS])
 AC_SUBST([OPTIONAL_PKCS11_HELPER_CFLAGS])
 AC_SUBST([OPTIONAL_PKCS11_HELPER_LIBS])
 
+AC_SUBST([PLUGIN_AUTH_PAM_CFLAGS])
+AC_SUBST([PLUGIN_AUTH_PAM_LIBS])
+
 AM_CONDITIONAL([WIN32], [test "${WIN32}" = "yes"])
 AM_CONDITIONAL([GIT_CHECKOUT], [test "${GIT_CHECKOUT}" = "yes"])
+AM_CONDITIONAL([ENABLE_PLUGIN_AUTH_PAM], [test "${enable_plugin_auth_pam}" = "yes"])
+AM_CONDITIONAL([ENABLE_PLUGIN_DOWN_ROOT], [test "${enable_plugin_down_root}" = "yes"])
 
+plugindir="${with_plugindir}"
 sampledir="\$(docdir)/sample"
+AC_SUBST([plugindir])
 AC_SUBST([sampledir])
 
 AC_CONFIG_FILES([

@@ -964,6 +1024,9 @@ AC_CONFIG_FILES([
 	src/compat/Makefile
 	src/openvpn/Makefile
 	src/openvpnserv/Makefile
+	src/plugins/Makefile
+	src/plugins/auth-pam/Makefile
+	src/plugins/down-root/Makefile
 	tests/Makefile
 	sample/Makefile
 	doc/Makefile

73 lines not on this page · raw message

index 46687b2..d33e1ed 100644
@@ -17,8 +17,11 @@ CLEANFILES = openvpn.8.html
 dist_doc_DATA = \
 	management-notes.txt
 
+dist_noinst_DATA = \
+	README.plugins
+
 if WIN32
-dist_noinst_DATA = openvpn.8
+dist_noinst_DATA += openvpn.8
 nodist_html_DATA = openvpn.8.html
 openvpn.8.html: $(srcdir)/openvpn.8
 	$(MAN2HTML) < $(srcdir)/openvpn.8 > openvpn.8.html

47 lines not on this page · raw message

index 8e35bfc..be30c88 100644
@@ -13,6 +13,7 @@ MAINTAINERCLEANFILES = \
 	$(srcdir)/Makefile.in
 
 EXTRA_DIST = \
+	sample-plugins \
 	sample-config-files \
 	sample-windows \
 	sample-keys \

new file mode 100644
index 0000000..d8990f8
@@ -0,0 +1,16 @@
+OpenVPN plugin examples.
+
+Examples provided:
+
+simple.c -- using the --auth-user-pass-verify callback,
+            test deferred authentication.
+
+To build:
+
+  ./build simple (Linux/BSD/etc.)
+  ./winbuild simple (MinGW on Windows)
+
+To use in OpenVPN, add to config file:
+
+  plugin simple.so (Linux/BSD/etc.)
+  plugin simple.dll (MinGW on Windows)

new file mode 100755
index 0000000..0612c08
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+#
+# Build an OpenVPN plugin module on *nix.  The argument should
+# be the base name of the C source file (without the .c).
+#
+
+# This directory is where we will look for openvpn-plugin.h
+CPPFLAGS="${CPPFLAGS:--I../../../include}"
+
+CC="${CC:-gcc}"
+CFLAGS="${CFLAGS:--O2 -Wall -g}"
+
+$CC $CPPFLAGS $CFLAGS -fPIC -c $1.c && \
+$CC $CFLAGS -fPIC -shared ${LDFLAS} -Wl,-soname,$1.so -o $1.so $1.o -lc

new file mode 100755
index 0000000..a87507d
@@ -0,0 +1,6 @@
+LIBRARY   OpenVPN_PLUGIN_SAMPLE
+DESCRIPTION "Sample OpenVPN plug-in module."
+EXPORTS
+   openvpn_plugin_open_v1   @1
+   openvpn_plugin_func_v1   @2
+   openvpn_plugin_close_v1  @3

new file mode 100755
index 0000000..82927d9
@@ -0,0 +1,18 @@
+#
+# Build an OpenVPN plugin module on Windows/MinGW.
+# The argument should be the base name of the C source file
+# (without the .c).
+#
+
+# This directory is where we will look for openvpn-plugin.h
+INCLUDE="-I../../../build"
+
+CC_FLAGS="-O2 -Wall"
+
+gcc -DBUILD_DLL $CC_FLAGS $INCLUDE -c $1.c
+gcc --disable-stdcall-fixup -mdll -DBUILD_DLL -o junk.tmp -Wl,--base-file,base.tmp $1.o
+rm junk.tmp
+dlltool --dllname $1.dll --base-file base.tmp --output-exp temp.exp --input-def $1.def
+rm base.tmp
+gcc --enable-stdcall-fixup -mdll -DBUILD_DLL -o $1.dll $1.o -Wl,temp.exp
+rm temp.exp

new file mode 100755
index 0000000..bbb05f7
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+#
+# Build an OpenVPN plugin module on *nix.  The argument should
+# be the base name of the C source file (without the .c).
+#
+
+# This directory is where we will look for openvpn-plugin.h
+CPPFLAGS="${CPPFLAGS:--I../../..}"
+
+CC="${CC:-gcc}"
+CFLAGS="${CFLAGS:--O2 -Wall -g}"
+
+$CC $CPPFLAGS $CFLAGS -fPIC -c $1.c && \
+$CC $CFLAGS -fPIC -shared $LDFLAGS -Wl,-soname,$1.so -o $1.so $1.o -lc

new file mode 100755
index 0000000..decf05f
@@ -0,0 +1,18 @@
+#
+# Build an OpenVPN plugin module on Windows/MinGW.
+# The argument should be the base name of the C source file
+# (without the .c).
+#
+
+# This directory is where we will look for openvpn-plugin.h
+INCLUDE="-I../../../include"
+
+CC_FLAGS="-O2 -Wall"
+
+gcc -DBUILD_DLL $CC_FLAGS $INCLUDE -c $1.c
+gcc --disable-stdcall-fixup -mdll -DBUILD_DLL -o junk.tmp -Wl,--base-file,base.tmp $1.o
+rm junk.tmp
+dlltool --dllname $1.dll --base-file base.tmp --output-exp temp.exp --input-def $1.def
+rm base.tmp
+gcc --enable-stdcall-fixup -mdll -DBUILD_DLL -o $1.dll $1.o -Wl,temp.exp
+rm temp.exp

new file mode 100644
index 0000000..4400cd3
@@ -0,0 +1,16 @@
+OpenVPN plugin examples.
+
+Examples provided:
+
+simple.c -- using the --auth-user-pass-verify callback, verify
+            that the username/password is "foo"/"bar".
+
+To build:
+
+  ./build simple (Linux/BSD/etc.)
+  ./winbuild simple (MinGW on Windows)
+
+To use in OpenVPN, add to config file:
+
+  plugin simple.so (Linux/BSD/etc.)
+  plugin simple.dll (MinGW on Windows)

new file mode 100755
index 0000000..bbb05f7
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+#
+# Build an OpenVPN plugin module on *nix.  The argument should
+# be the base name of the C source file (without the .c).
+#
+
+# This directory is where we will look for openvpn-plugin.h
+CPPFLAGS="${CPPFLAGS:--I../../..}"
+
+CC="${CC:-gcc}"
+CFLAGS="${CFLAGS:--O2 -Wall -g}"
+
+$CC $CPPFLAGS $CFLAGS -fPIC -c $1.c && \
+$CC $CFLAGS -fPIC -shared $LDFLAGS -Wl,-soname,$1.so -o $1.so $1.o -lc

new file mode 100755
index 0000000..a87507d
@@ -0,0 +1,6 @@
+LIBRARY   OpenVPN_PLUGIN_SAMPLE
+DESCRIPTION "Sample OpenVPN plug-in module."
+EXPORTS
+   openvpn_plugin_open_v1   @1
+   openvpn_plugin_func_v1   @2
+   openvpn_plugin_close_v1  @3

new file mode 100755
index 0000000..decf05f
@@ -0,0 +1,18 @@
+#
+# Build an OpenVPN plugin module on Windows/MinGW.
+# The argument should be the base name of the C source file
+# (without the .c).
+#
+
+# This directory is where we will look for openvpn-plugin.h
+INCLUDE="-I../../../include"
+
+CC_FLAGS="-O2 -Wall"
+
+gcc -DBUILD_DLL $CC_FLAGS $INCLUDE -c $1.c
+gcc --disable-stdcall-fixup -mdll -DBUILD_DLL -o junk.tmp -Wl,--base-file,base.tmp $1.o
+rm junk.tmp
+dlltool --dllname $1.dll --base-file base.tmp --output-exp temp.exp --input-def $1.def
+rm base.tmp
+gcc --enable-stdcall-fixup -mdll -DBUILD_DLL -o $1.dll $1.o -Wl,temp.exp
+rm temp.exp

index b894977..c04468a 100644
@@ -12,7 +12,4 @@
 MAINTAINERCLEANFILES = \
 	$(srcdir)/Makefile.in
 
-EXTRA_DIST = \
-	plugins
-
-SUBDIRS = compat openvpn openvpnserv
+SUBDIRS = compat openvpn openvpnserv plugins

new file mode 100644
index 0000000..17b72b9
@@ -0,0 +1,15 @@
+#
+#  OpenVPN -- An application to securely tunnel IP networks
+#             over a single UDP port, with support for SSL/TLS-based
+#             session authentication and key exchange,
+#             packet encryption, packet authentication, and
+#             packet compression.
+#
+#  Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <[email protected]...>
+#  Copyright (C) 2006-2012 Alon Bar-Lev <[email protected]...>
+#
+
+MAINTAINERCLEANFILES = \
+	$(srcdir)/Makefile.in
+
+SUBDIRS = auth-pam down-root

47 lines not on this page · raw message

deleted file mode 100755
index c0b9c79..0000000
@@ -1,32 +0,0 @@
-#
-# Build the OpenVPN auth-pam plugin module.
-#
-
-# If PAM modules are not linked against libpam.so, set DLOPEN_PAM to 1. This
-# must be done on SUSE 9.1, at least.
-DLOPEN_PAM=0
-
-ifeq ($(DLOPEN_PAM),1)
-	LIBPAM=-ldl
-else
-	LIBPAM=-lpam
-endif
-
-# This directory is where we will look for openvpn-plugin.h
-CPPFLAGS=-I../../../include
-
-CC=gcc
-CFLAGS=-O2 -Wall
-DEFS = -DDLOPEN_PAM=$(DLOPEN_PAM)
-
-openvpn-auth-pam.so : auth-pam.o pamdl.o
-	$(CC) $(CFLAGS) -fPIC -shared $(LDFLAGS) -Wl,-soname,openvpn-auth-pam.so -o openvpn-auth-pam.so auth-pam.o pamdl.o -lc $(LIBPAM)
-
-auth-pam.o : auth-pam.c pamdl.h
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(DEFS) -fPIC -c auth-pam.c
-
-pamdl.o : pamdl.c pamdl.h
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(DEFS) -fPIC -c pamdl.c
-
-clean :
-	-rm -f *.o *.so

new file mode 100644
index 0000000..701a749
@@ -0,0 +1,27 @@
+#
+#  OpenVPN (TM) PAM Auth Plugin -- OpenVPN Plugin
+#
+#  Copyright (C) 2012      Alon Bar-Lev <[email protected]...>
+#
+
+MAINTAINERCLEANFILES = \
+	$(srcdir)/Makefile.in
+
+AM_CFLAGS = \
+	-I$(top_srcdir)/include
+	$(PLUGIN_AUTH_PAM_CFLAGS)
+
+if ENABLE_PLUGIN_AUTH_PAM
+plugin_LTLIBRARIES = openvpn-plugin-auth-pam.la
+dist_doc_DATA = README.auth-pam
+endif
+
+openvpn_plugin_auth_pam_la_SOURCES = \
+	auth-pam.c \
+	pamdl.c  pamdl.h \
+	auth-pam.exports
+openvpn_plugin_auth_pam_la_LIBADD = \
+	$(PLUGIN_AUTH_PAM_LIBS)
+openvpn_plugin_auth_pam_la_LDFLAGS = $(AM_LDFLAGS) \
+	-export-symbols "$(srcdir)/auth-pam.exports" \
+	-module -shared -avoid-version -no-undefined

74 lines not on this page · raw message

74 lines not on this page · raw message

new file mode 100644
index 0000000..b07937c
@@ -0,0 +1,4 @@
+openvpn_plugin_open_v1
+openvpn_plugin_func_v1
+openvpn_plugin_close_v1
+openvpn_plugin_abort_v1

deleted file mode 100644
index d8990f8..0000000
@@ -1,16 +0,0 @@
-OpenVPN plugin examples.
-
-Examples provided:
-
-simple.c -- using the --auth-user-pass-verify callback,
-            test deferred authentication.
-
-To build:
-
-  ./build simple (Linux/BSD/etc.)
-  ./winbuild simple (MinGW on Windows)
-
-To use in OpenVPN, add to config file:
-
-  plugin simple.so (Linux/BSD/etc.)
-  plugin simple.dll (MinGW on Windows)

deleted file mode 100755
index 0612c08..0000000
@@ -1,15 +0,0 @@
-#!/bin/sh
-
-#
-# Build an OpenVPN plugin module on *nix.  The argument should
-# be the base name of the C source file (without the .c).
-#
-
-# This directory is where we will look for openvpn-plugin.h
-CPPFLAGS="${CPPFLAGS:--I../../../include}"
-
-CC="${CC:-gcc}"
-CFLAGS="${CFLAGS:--O2 -Wall -g}"
-
-$CC $CPPFLAGS $CFLAGS -fPIC -c $1.c && \
-$CC $CFLAGS -fPIC -shared ${LDFLAS} -Wl,-soname,$1.so -o $1.so $1.o -lc

deleted file mode 100755
index a87507d..0000000
@@ -1,6 +0,0 @@
-LIBRARY   OpenVPN_PLUGIN_SAMPLE
-DESCRIPTION "Sample OpenVPN plug-in module."
-EXPORTS
-   openvpn_plugin_open_v1   @1
-   openvpn_plugin_func_v1   @2
-   openvpn_plugin_close_v1  @3

deleted file mode 100755
index 82927d9..0000000
@@ -1,18 +0,0 @@
-#
-# Build an OpenVPN plugin module on Windows/MinGW.
-# The argument should be the base name of the C source file
-# (without the .c).
-#
-
-# This directory is where we will look for openvpn-plugin.h
-INCLUDE="-I../../../build"
-
-CC_FLAGS="-O2 -Wall"
-
-gcc -DBUILD_DLL $CC_FLAGS $INCLUDE -c $1.c
-gcc --disable-stdcall-fixup -mdll -DBUILD_DLL -o junk.tmp -Wl,--base-file,base.tmp $1.o
-rm junk.tmp
-dlltool --dllname $1.dll --base-file base.tmp --output-exp temp.exp --input-def $1.def
-rm base.tmp
-gcc --enable-stdcall-fixup -mdll -DBUILD_DLL -o $1.dll $1.o -Wl,temp.exp
-rm temp.exp

deleted file mode 100755
index e66c99a..0000000
@@ -1,18 +0,0 @@
-#
-# Build the OpenVPN down-root plugin module.
-#
-
-# This directory is where we will look for openvpn-plugin.h
-CPPFLAGS=-I../../../include
-
-CC=gcc
-CFLAGS=-O2 -Wall
-
-down-root.so : down-root.o
-	$(CC) $(CFLAGS) -fPIC -shared $(LDFLAGS) -Wl,-soname,openvpn-down-root.so -o openvpn-down-root.so down-root.o -lc
-
-down-root.o : down-root.c
-	$(CC) $(CPPFLAGS) $(CFLAGS) -fPIC -c down-root.c
-
-clean :
-	-rm -f *.o *.so

new file mode 100644
index 0000000..064aa30
@@ -0,0 +1,23 @@
+#
+#  OpenVPN (TM) Down Root Plugin -- OpenVPN Plugin
+#
+#  Copyright (C) 2012      Alon Bar-Lev <[email protected]...>
+#
+
+MAINTAINERCLEANFILES = \
+	$(srcdir)/Makefile.in
+
+AM_CFLAGS = \
+	-I$(top_srcdir)/include
+
+if ENABLE_PLUGIN_DOWN_ROOT
+plugin_LTLIBRARIES = openvpn-plugin-down-root.la
+dist_doc_DATA = README.down-root
+endif
+
+openvpn_plugin_down_root_la_SOURCES = \
+	down-root.c \
+	down-root.exports
+openvpn_plugin_down_root_la_LDFLAGS = $(AM_LDFLAGS) \
+	-export-symbols "$(srcdir)/down-root.exports" \
+	-module -shared -avoid-version -no-undefined

deleted file mode 100644
index d337ffe..0000000
@@ -1,29 +0,0 @@
-down-root -- an OpenVPN Plugin Module
-
-SYNOPSIS
-
-The down-root module allows an OpenVPN configuration to
-call a down script with root privileges, even when privileges
-have been dropped using --user/--group/--chroot.
-
-This module uses a split privilege execution model which will
-fork() before OpenVPN drops root privileges, at the point where
-the --up script is usually called.  The module will then remain
-in a wait state until it receives a message from OpenVPN via
-pipe to execute the down script.  Thus, the down script will be
-run in the same execution environment as the up script.
-
-BUILD
-
-Build this module with the "make" command.  The plugin
-module will be named openvpn-down-root.so
-
-USAGE
-
-To use this module, add to your OpenVPN config file:
-
-  plugin openvpn-down-root.so "command ..."
-
-CAVEATS
-
-This module will only work on *nix systems, not Windows.

new file mode 100644
index 0000000..d337ffe
@@ -0,0 +1,29 @@
+down-root -- an OpenVPN Plugin Module
+
+SYNOPSIS
+
+The down-root module allows an OpenVPN configuration to
+call a down script with root privileges, even when privileges
+have been dropped using --user/--group/--chroot.
+
+This module uses a split privilege execution model which will
+fork() before OpenVPN drops root privileges, at the point where
+the --up script is usually called.  The module will then remain
+in a wait state until it receives a message from OpenVPN via
+pipe to execute the down script.  Thus, the down script will be
+run in the same execution environment as the up script.
+
+BUILD
+
+Build this module with the "make" command.  The plugin
+module will be named openvpn-down-root.so
+
+USAGE
+
+To use this module, add to your OpenVPN config file:
+
+  plugin openvpn-down-root.so "command ..."
+
+CAVEATS
+
+This module will only work on *nix systems, not Windows.

new file mode 100644
index 0000000..b07937c
@@ -0,0 +1,4 @@
+openvpn_plugin_open_v1
+openvpn_plugin_func_v1
+openvpn_plugin_close_v1
+openvpn_plugin_abort_v1

deleted file mode 100644
index 4400cd3..0000000
@@ -1,16 +0,0 @@
-OpenVPN plugin examples.
-
-Examples provided:
-
-simple.c -- using the --auth-user-pass-verify callback, verify
-            that the username/password is "foo"/"bar".
-
-To build:
-
-  ./build simple (Linux/BSD/etc.)
-  ./winbuild simple (MinGW on Windows)
-
-To use in OpenVPN, add to config file:
-
-  plugin simple.so (Linux/BSD/etc.)
-  plugin simple.dll (MinGW on Windows)

deleted file mode 100755
index bbb05f7..0000000
@@ -1,15 +0,0 @@
-#!/bin/sh
-
-#
-# Build an OpenVPN plugin module on *nix.  The argument should
-# be the base name of the C source file (without the .c).
-#
-
-# This directory is where we will look for openvpn-plugin.h
-CPPFLAGS="${CPPFLAGS:--I../../..}"
-
-CC="${CC:-gcc}"
-CFLAGS="${CFLAGS:--O2 -Wall -g}"
-
-$CC $CPPFLAGS $CFLAGS -fPIC -c $1.c && \
-$CC $CFLAGS -fPIC -shared $LDFLAGS -Wl,-soname,$1.so -o $1.so $1.o -lc

deleted file mode 100755
index a87507d..0000000
@@ -1,6 +0,0 @@
-LIBRARY   OpenVPN_PLUGIN_SAMPLE
-DESCRIPTION "Sample OpenVPN plug-in module."
-EXPORTS
-   openvpn_plugin_open_v1   @1
-   openvpn_plugin_func_v1   @2
-   openvpn_plugin_close_v1  @3

deleted file mode 100755
index decf05f..0000000
@@ -1,18 +0,0 @@
-#
-# Build an OpenVPN plugin module on Windows/MinGW.
-# The argument should be the base name of the C source file
-# (without the .c).
-#
-
-# This directory is where we will look for openvpn-plugin.h
-INCLUDE="-I../../../include"
-
-CC_FLAGS="-O2 -Wall"
-
-gcc -DBUILD_DLL $CC_FLAGS $INCLUDE -c $1.c
-gcc --disable-stdcall-fixup -mdll -DBUILD_DLL -o junk.tmp -Wl,--base-file,base.tmp $1.o
-rm junk.tmp
-dlltool --dllname $1.dll --base-file base.tmp --output-exp temp.exp --input-def $1.def
-rm base.tmp
-gcc --enable-stdcall-fixup -mdll -DBUILD_DLL -o $1.dll $1.o -Wl,temp.exp
-rm temp.exp