Alexander Barton : Change build system to support new and old GNU automake - ngIRCd GIT Updates

24 Sep 2012

Module: ngircd.git
Branch: master
Commit: 192e304b94f239de13b0f10ca01f6694fe6eea40
URL:    http://ngircd.barton.de/cgi-bin/gitweb.cgi?p=ngircd.git&a=commit;h=192e3...
Author: Alexander Barton alex@barton.de
Date:   Sun Sep 23 17:55:48 2012 +0200
Change build system to support new and old GNU automake
Starting with GNU automake 1.12, the "de-ANSI-fication support" has been
removed, which ngIRCd used to enable building itself on very old systems.
Now the problem is, that using automake >= 1.12 isn't working because of
the now unsupported M4 macros. Therefore the solution that this patch
implements is to dynamically generate the automake input files with our
own ./autogen.sh script:
configure.ng => configure.in
  Makefile.ng => Makefile.am
This is quite an ugly approach, but it works and enables us to:
1. use current automake >= 1.12 for development and "private builds",
  2. still build distribution archives using automake 1.11.x that have
     "de-ANSI-fication support" enabled in the generated Makefile's.
And if you are using Makefile's generated with a automake version newer
than 1.11.x (without "de-ANSI-fication support"), the ./configure script
warns you not to use this generated build system to generate distribution
archives.
Drawback of this patch: you MUST use our autogen.sh script, you can't call
the autoconf/automake commands directly any more; but autoreconf should
still work ...
---
.gitignore                                 |    1 +
 autogen.sh                                 |   44 +++++++++++++++++++++++-----
 configure.in => configure.ng               |   10 ++++++-
 src/ipaddr/.gitignore                      |    1 +
 src/ipaddr/{Makefile.am => Makefile.ng}    |    2 +-
 src/ngircd/.gitignore                      |    1 +
 src/ngircd/{Makefile.am => Makefile.ng}    |    2 +-
 src/portab/.gitignore                      |    1 +
 src/portab/{Makefile.am => Makefile.ng}    |    2 +-
 src/testsuite/.gitignore                   |    1 +
 src/testsuite/{Makefile.am => Makefile.ng} |    2 +-
 src/tool/.gitignore                        |    1 +
 src/tool/{Makefile.am => Makefile.ng}      |    2 +-
 13 files changed, 57 insertions(+), 13 deletions(-)

diff --git a/.gitignore b/.gitignore
index 1990041..bfa3542 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,7 @@ build-stamp-ngircd*
 config.log
 config.status
 configure
+configure.in
 configure.lineno
 cscope.out
 debian
diff --git a/autogen.sh b/autogen.sh
index cca200b..d47d750 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -16,6 +16,11 @@
 # GNU autoconf. It tries to be smart in finding the correct/usable/available
 # installed versions of these tools on your system.
 #
+# In addition, it enables or disables the "de-ANSI-fication" support of GNU
+# automake, which is supported up to autoconf 1.11.x an has been removed
+# in automake 1.12 -- make sure to use a version of automake supporting it
+# when generating distribution archives!
+#
 # The following strategy is used for each of aclocal, autoheader, automake,
 # and autoconf: first, "tool" (the regular name of the tool, e. g. "autoconf"
 # or "automake") is checked. If this fails, "tool<major><minor>" (for example
@@ -129,7 +134,7 @@ fi
# Try to detect the needed tools when no environment variable already
 # specifies one:
-echo "Searching tools ..."
+echo "Searching for required tools ..."
 [ -z "$ACLOCAL" ] && ACLOCAL=`Search aclocal 1`
 [ "$VERBOSE" = "1" ] && echo " - ACLOCAL=$ACLOCAL"
 [ -z "$AUTOHEADER" ] && AUTOHEADER=`Search autoheader 2`
@@ -139,9 +144,8 @@ echo "Searching tools ..."
 [ -z "$AUTOCONF" ] && AUTOCONF=`Search autoconf 2`
 [ "$VERBOSE" = "1" ] && echo " - AUTOCONF=$AUTOCONF"
-# Call ./configure when parameters have been passed to this script and
-# GO isn't already defined.
-[ -z "$GO" -a $# -gt 0 ] && GO=1
+[ $# -gt 0 ] && CONFIGURE_ARGS=" $@" || CONFIGURE_ARGS=""
+[ -z "$GO" -a -n "$CONFIGURE_ARGS" ] && GO=1
# Verify that all tools have been found
 [ -z "$ACLOCAL" ] && Notfound aclocal
@@ -149,10 +153,37 @@ echo "Searching tools ..."
 [ -z "$AUTOMAKE" ] && Notfound automake
 [ -z "$AUTOCONF" ] && Notfound autoconf
+AM_VERSION=`$AUTOMAKE --version | egrep -o "([0-9]+.[0-9]+.[0-9]+)"`
+ifs=$IFS; IFS="."; set $AM_VERSION; IFS=$ifs
+AM_MAJOR="$1"; AM_MINOR="$2"; AM_PATCHLEVEL="$3"
+
+AM_MAKEFILES="src/ipaddr/Makefile.ng src/ngircd/Makefile.ng src/testsuite/Makefile.ng src/tool/Makefile.ng"
+
+if [ "$AM_MAJOR" -eq "1" -a "$AM_MINOR" -lt "12" ]; then
+	# automake < 1.12 => automatic de-ANSI-fication support available
+	echo "Enabling de-ANSI-fication support (automake $AM_VERSION) ..."
+	sed -e "s|^__ng_PROTOTYPES__|AM_C_PROTOTYPES|g" configure.ng >configure.in
+	DEANSI_START=""
+	DEANSI_END=""
+else
+	# automake >= 1.12 => no de-ANSI-fication support available
+	echo "Disabling de-ANSI-fication support (automake $AM_VERSION) ..."
+	sed -e "s|^__ng_PROTOTYPES__|AC_C_PROTOTYPES|g" configure.ng >configure.in
+	DEANSI_START="#"
+	DEANSI_END="	# disabled by ./autogen.sh script"
+fi
+sed -e "s|^__ng_Makefile_am_template__|${DEANSI_START}AUTOMAKE_OPTIONS = ansi2knr${DEANSI_END}|g" \
+	src/portab/Makefile.ng >src/portab/Makefile.am
+for makefile_ng in $AM_MAKEFILES; do
+	makefile_am=`echo "$makefile_ng" | sed -e "s|.ng$|.am|g"`
+	sed -e "s|^__ng_Makefile_am_template__|${DEANSI_START}AUTOMAKE_OPTIONS = ../portab/ansi2knr${DEANSI_END}|g" \
+		$makefile_ng >$makefile_am
+done
+
 export ACLOCAL AUTOHEADER AUTOMAKE AUTOCONF
# Generate files
-echo "Generating files ..."
+echo "Generating files using GNU $AUTOCONF and $AUTOMAKE ..."
 Run $ACLOCAL && \
    Run $AUTOCONF && \
    Run $AUTOHEADER && \
@@ -164,8 +195,7 @@ if [ $? -eq 0 -a -x ./configure ]; then
    NAME=`grep PACKAGE_STRING= configure | cut -d"'" -f2`
    if [ "$GO" = "1" ]; then
    	[ -n "$PREFIX" ] && p=" --prefix=$PREFIX" || p=""
-		[ -n "$*" ] && a=" $*" || a=""
-		c="./configure${p}${a}"
+		c="./configure${p}${CONFIGURE_ARGS}"
    	echo "Okay, autogen.sh for $NAME done."
    	echo "Calling "$c" ..."
    	$c
diff --git a/configure.in b/configure.ng
similarity index 97%
rename from configure.in
rename to configure.ng
index 949a383..25654f9 100644
--- a/configure.in
+++ b/configure.ng
@@ -61,7 +61,7 @@ AC_PROG_RANLIB
AC_C_CONST
 AC_C_INLINE
-AM_C_PROTOTYPES
+__ng_PROTOTYPES__
# -- Hard coded system and compiler dependencies/features/options ... --
@@ -674,4 +674,12 @@ echo "$x_ssl_lib"
echo
+if ! grep "^AUTOMAKE_OPTIONS = ../portab/ansi2knr" src/ngircd/Makefile.am >/dev/null 2>&1; then
+	echo "WARNING:"
+	echo "This GNU automake generated build system does not support "de-ANSI-fication","
+	echo "therefore don't use it to generate "official" distribution archives!"
+	echo "(Most probably you want to use GNU automake 1.11.x for this purpose ...)"
+	echo
+fi
+
 # -eof-
diff --git a/src/ipaddr/.gitignore b/src/ipaddr/.gitignore
new file mode 100644
index 0000000..08a6d72
--- /dev/null
+++ b/src/ipaddr/.gitignore
@@ -0,0 +1 @@
+Makefile.am
diff --git a/src/ipaddr/Makefile.am b/src/ipaddr/Makefile.ng
similarity index 88%
rename from src/ipaddr/Makefile.am
rename to src/ipaddr/Makefile.ng
index 6ce299f..3d5a5db 100644
--- a/src/ipaddr/Makefile.am
+++ b/src/ipaddr/Makefile.ng
@@ -3,7 +3,7 @@
 # (c) 2008 Florian Westphal fw@strlen.de, public domain.
 #
-AUTOMAKE_OPTIONS = ../portab/ansi2knr
+__ng_Makefile_am_template__
INCLUDES = -I$(srcdir)/../portab
diff --git a/src/ngircd/.gitignore b/src/ngircd/.gitignore
index c25ba5e..d1148bf 100644
--- a/src/ngircd/.gitignore
+++ b/src/ngircd/.gitignore
@@ -1,3 +1,4 @@
+Makefile.am
 check-help
 check-version
 ngircd
diff --git a/src/ngircd/Makefile.am b/src/ngircd/Makefile.ng
similarity index 98%
rename from src/ngircd/Makefile.am
rename to src/ngircd/Makefile.ng
index 3a411a9..db3ecfe 100644
--- a/src/ngircd/Makefile.am
+++ b/src/ngircd/Makefile.ng
@@ -9,7 +9,7 @@
 # Please read the file COPYING, README and AUTHORS for more information.
 #
-AUTOMAKE_OPTIONS = ../portab/ansi2knr
+__ng_Makefile_am_template__
INCLUDES = -I$(srcdir)/../portab -I$(srcdir)/../tool -I$(srcdir)/../ipaddr
diff --git a/src/portab/.gitignore b/src/portab/.gitignore
index 839a69f..9bac6ac 100644
--- a/src/portab/.gitignore
+++ b/src/portab/.gitignore
@@ -1 +1,2 @@
+Makefile.am
 portabtest
diff --git a/src/portab/Makefile.am b/src/portab/Makefile.ng
similarity index 97%
rename from src/portab/Makefile.am
rename to src/portab/Makefile.ng
index a57ea49..5681a53 100644
--- a/src/portab/Makefile.am
+++ b/src/portab/Makefile.ng
@@ -10,7 +10,7 @@
 # der an ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS.
 #
-AUTOMAKE_OPTIONS = ansi2knr
+__ng_Makefile_am_template__
noinst_LIBRARIES = libngportab.a
diff --git a/src/testsuite/.gitignore b/src/testsuite/.gitignore
index 5884a48..b33a08f 100644
--- a/src/testsuite/.gitignore
+++ b/src/testsuite/.gitignore
@@ -1,3 +1,4 @@
+Makefile.am
 T-ngircd1
 T-ngircd2
 channel-test
diff --git a/src/testsuite/Makefile.am b/src/testsuite/Makefile.ng
similarity index 98%
rename from src/testsuite/Makefile.am
rename to src/testsuite/Makefile.ng
index 9dc76a7..fe642e8 100644
--- a/src/testsuite/Makefile.am
+++ b/src/testsuite/Makefile.ng
@@ -10,7 +10,7 @@
 # der an ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS.
 #
-AUTOMAKE_OPTIONS = ../portab/ansi2knr
+__ng_Makefile_am_template__
INCLUDES = -I$(srcdir)/../portab
diff --git a/src/tool/.gitignore b/src/tool/.gitignore
new file mode 100644
index 0000000..08a6d72
--- /dev/null
+++ b/src/tool/.gitignore
@@ -0,0 +1 @@
+Makefile.am
diff --git a/src/tool/Makefile.am b/src/tool/Makefile.ng
similarity index 94%
rename from src/tool/Makefile.am
rename to src/tool/Makefile.ng
index 8d6cda4..807f24b 100644
--- a/src/tool/Makefile.am
+++ b/src/tool/Makefile.ng
@@ -9,7 +9,7 @@
 # Please read the file COPYING, README and AUTHORS for more information.
 #
-AUTOMAKE_OPTIONS = ../portab/ansi2knr
+__ng_Makefile_am_template__
INCLUDES = -I$(srcdir)/../portab

    