autogen.sh - platform/external/libpng - Gitiles

 #! /bin/sh
 #
 # Run 'autoreconf' to build 'configure', 'Makefile.in' and other configure
 # control files.
 #
 # The first time this is run on a GIT checkout the only files that exist are
 # configure.ac and Makefile.am; all of the autotools support scripts are
 # missing.  They are instantiated with autoreconf --force --install.
 #
 # For regular ("tarball") distributions all the files should exist.  We do not
 # want them to be updated *under any circumstances*.  It should never be
 # necessary to run autogen.sh because ./configure --enable-maintainer-mode says
 # what to do if Makefile.am or configure.ac are changed.
 #
 # It is *probably* OK to update the files on a GIT checkout, because they have
 # come from the local tools, but leave that to the user who is assumed to know
 # whether it is ok or required.
 #
 # This script is intended to work without arguments, there are, however, hidden
 # arguments (a) for use while testing the script and (b) to fix up systems that
 # have been broken.  If (b) is required the script prompts for the correct
 # options.  For this reason the options are *NOT* documented in the help; this
 # is deliberate; UTSL.
 #
 clean=
 maintainer=
 while test $# -gt 0
 do
    case "$1" in
       --maintainer)
          maintainer=1;;

       --clean)
          clean=1;;

       *)
          exec >&2
          echo "$0: usage: ./autogen.sh"
          if test -d .git
          then
             echo "  ./autogen.sh generates the configure script and"
             echo "  Makefile.in, or refreshes them after changes to Makefile.am"
             echo "  or configure.ac.  You may prefer to just run autoreconf."
          elif test -z "$maintainer"
          then
             echo "  DO NOT RUN THIS SCRIPT."
             echo "  If you need to change Makefile.am or configure.ac then you"
             echo "  also need to run ./configure --enable-maintainer-mode and"
             echo "  use the appropriate autotools, *NOT* this script, to update"
             echo "  everything, please check the documentation of autoreconf."
             echo "  WARNING: libpng is intentionally generated with a known,"
             echo "  fixed, set of autotools.  It is known *NOT* to work with"
             echo "  the collection of autotools distributed on highly reputable"
             echo "  operating systems."
             echo "  Remember: autotools is GNU software, you are expected to"
             echo "  pay for support."
          else
             echo "  You have run autogen.sh with --maintainer enabled and you"
             echo "  are not using a GIT distribution, then you have given an"
             echo "  unrecognized argument.  This is not good. --maintainer"
             echo "  switches off any assumptions that you might not know what"
             echo "  you are doing."
          fi
          exit 1;;
    esac

    shift
 done
 #
 # First check for a set of the autotools files; if absent then this is assumed
 # to be a GIT version and the local autotools must be used.  If present this
 # is a tarball distribution and the script should not be used.  If partially
 # present bad things are happening.
 #
 # The autotools generated files:
 libpng_autotools_files="Makefile.in aclocal.m4 config.guess config.h.in\
    config.sub configure depcomp install-sh ltmain.sh missing test-driver"
 #
 # Files generated by versions of configue >2.68 or automake >1.13 (i.e. later
 # versions than those required by configure.ac):
 libpng_autotools_extra="compile"
 #
 # These are separate because 'maintainer-clean' does not remove them.
 libpng_libtool_files="scripts/libtool.m4 scripts/ltoptions.m4\
    scripts/ltsugar.m4 scripts/ltversion.m4 scripts/lt~obsolete.m4"

 libpng_autotools_dirs="autom4te.cache" # not required
 #
 # The configure generated files:
 libpng_configure_files="Makefile config.h config.log config.status\
    libpng-config libpng.pc libtool stamp-h1"

 libpng_configure_dirs=".deps"
 #
 # We must remove the configure generated files as well as the autotools
 # generated files if autotools are regenerated because otherwise if configure
 # has been run without "--enable-maintainer-mode" make can do a partial update
 # of Makefile.  These functions do the two bits of cleaning.
 clean_autotools(){
    rm -rf $libpng_autotools_files $libpng_libtool_files $libpng_autotools_dirs
    rm -rf $libpng_autotools_extra
 }

 clean_configure(){
    rm -rf $libpng_configure_files $libpng_configure_dirs
 }
 #
 # Clean: remove everything (this is to help with testing)
 if test -n "$clean"
 then
    clean_configure
    if test -n "$maintainer"
    then
       clean_autotools
    fi

    exit 0
 fi
 #
 # Validate the distribution.
 libpng_autotools_file_found=
 libpng_autotools_file_missing=
 for file in $libpng_autotools_files
 do
    if test -f  "$file"
    then
       libpng_autotools_file_found=1
    else
       libpng_autotools_file_missing=1
    fi
 done
 #
 # Presence of one of these does not *invalidate* missing, but absence
 # invalidates found.
 for file in $libpng_libtool_files
 do
    if test ! -f "$file"
    then
       libpng_autotools_file_missing=1
    fi
 done
 #
 # The cache directory doesn't matter - it will be regenerated and does not exist
 # anyway in a tarball.
 #
 # Either everything is missing or everything is there, the --maintainer option
 # just changes this so that the mode is set to generate all the files.
 mode=
 if test -z "$libpng_autotools_file_found" -o -n "$maintainer"
 then
    mode="autoreconf"
 else
    if test -n "$libpng_autotools_file_missing"
    then
       mode="broken"
    else
       mode="configure"
    fi
 fi
 #
 # So:
 case "$mode" in
    autoreconf)
       # Clean in case configure files exist
       clean_configure
       clean_autotools
       # Everything must be initialized, so use --force
       if autoreconf --warnings=all --force --install
       then
          missing=
          for file in $libpng_autotools_files
          do
             test -f "$file" || missing=1
          done
          # ignore the cache directory
          test -z "$missing" || {
             exec >&2
             echo "autoreconf was run, but did not produce all the expected"
             echo "files.  It is likely that your autotools installation is"
             echo "not compatible with that expected by libpng."
             exit 1
          }
       else
          exec >&2
          echo "autoreconf failed: your version of autotools is incompatible"
          echo "with this libpng version.  Please use a distributed archive"
          echo "(which includes the autotools generated files) and run configure"
          echo "instead."
          exit 1
       fi;;

    configure)
       if test -d .git
       then
          exec >&2
          echo "ERROR: running autoreconf on an initialized sytem"
          echo "  This is not necessary; it is only necessary to remake the"
          echo "  autotools generated files if Makefile.am or configure.ac"
          echo "  change and make does the right thing with:"
          echo
          echo "     ./configure --enable-maintainer-mode."
          echo
          echo "  You can run autoreconf yourself if you don't like maintainer"
          echo "  mode and you can also just run autoreconf -f -i to initialize"
          echo "  everything in the first place; this script is only for"
          echo "  compatibility with prior releases."
          exit 1
       else
          exec >&2
          echo "autogen.sh is intended only to generate 'configure' on systems"
          echo "that do not have it.  You have a complete 'configure', if you"
          echo "need to change Makefile.am or configure.ac you also need to"
          echo "run configure with the --enable-maintainer-mode option."
          exit 1
       fi;;

    broken)
       exec >&2
       echo "Your system has a partial set of autotools generated files."
       echo "autogen.sh is unable to proceed.  The full set of files is"
       echo "contained in the libpng 'tar' distribution archive and you do"
       echo "not need to run autogen.sh if you use it."
       exit 1;;
 esac
	#! /bin/sh
	#
	# Run 'autoreconf' to build 'configure', 'Makefile.in' and other configure
	# control files.
	#
	# The first time this is run on a GIT checkout the only files that exist are
	# configure.ac and Makefile.am; all of the autotools support scripts are
	# missing. They are instantiated with autoreconf --force --install.
	#
	# For regular ("tarball") distributions all the files should exist. We do not
	# want them to be updated under any circumstances. It should never be
	# necessary to run autogen.sh because ./configure --enable-maintainer-mode says
	# what to do if Makefile.am or configure.ac are changed.
	#
	# It is probably OK to update the files on a GIT checkout, because they have
	# come from the local tools, but leave that to the user who is assumed to know
	# whether it is ok or required.
	#
	# This script is intended to work without arguments, there are, however, hidden
	# arguments (a) for use while testing the script and (b) to fix up systems that
	# have been broken. If (b) is required the script prompts for the correct
	# options. For this reason the options are NOT documented in the help; this
	# is deliberate; UTSL.
	#
	clean=
	maintainer=
	while test $# -gt 0
	do
	case "$1" in
	--maintainer)
	maintainer=1;;

	--clean)
	clean=1;;

	*)
	exec >&2
	echo "$0: usage: ./autogen.sh"
	if test -d .git
	then
	echo " ./autogen.sh generates the configure script and"
	echo " Makefile.in, or refreshes them after changes to Makefile.am"
	echo " or configure.ac. You may prefer to just run autoreconf."
	elif test -z "$maintainer"
	then
	echo " DO NOT RUN THIS SCRIPT."
	echo " If you need to change Makefile.am or configure.ac then you"
	echo " also need to run ./configure --enable-maintainer-mode and"
	echo " use the appropriate autotools, NOT this script, to update"
	echo " everything, please check the documentation of autoreconf."
	echo " WARNING: libpng is intentionally generated with a known,"
	echo " fixed, set of autotools. It is known NOT to work with"
	echo " the collection of autotools distributed on highly reputable"
	echo " operating systems."
	echo " Remember: autotools is GNU software, you are expected to"
	echo " pay for support."
	else
	echo " You have run autogen.sh with --maintainer enabled and you"
	echo " are not using a GIT distribution, then you have given an"
	echo " unrecognized argument. This is not good. --maintainer"
	echo " switches off any assumptions that you might not know what"
	echo " you are doing."
	fi
	exit 1;;
	esac

	shift
	done
	#
	# First check for a set of the autotools files; if absent then this is assumed
	# to be a GIT version and the local autotools must be used. If present this
	# is a tarball distribution and the script should not be used. If partially
	# present bad things are happening.
	#
	# The autotools generated files:
	libpng_autotools_files="Makefile.in aclocal.m4 config.guess config.h.in\
	config.sub configure depcomp install-sh ltmain.sh missing test-driver"
	#
	# Files generated by versions of configue >2.68 or automake >1.13 (i.e. later
	# versions than those required by configure.ac):
	libpng_autotools_extra="compile"
	#
	# These are separate because 'maintainer-clean' does not remove them.
	libpng_libtool_files="scripts/libtool.m4 scripts/ltoptions.m4\
	scripts/ltsugar.m4 scripts/ltversion.m4 scripts/lt~obsolete.m4"

	libpng_autotools_dirs="autom4te.cache" # not required
	#
	# The configure generated files:
	libpng_configure_files="Makefile config.h config.log config.status\
	libpng-config libpng.pc libtool stamp-h1"

	libpng_configure_dirs=".deps"
	#
	# We must remove the configure generated files as well as the autotools
	# generated files if autotools are regenerated because otherwise if configure
	# has been run without "--enable-maintainer-mode" make can do a partial update
	# of Makefile. These functions do the two bits of cleaning.
	clean_autotools(){
	rm -rf $libpng_autotools_files $libpng_libtool_files $libpng_autotools_dirs
	rm -rf $libpng_autotools_extra
	}

	clean_configure(){
	rm -rf $libpng_configure_files $libpng_configure_dirs
	}
	#
	# Clean: remove everything (this is to help with testing)
	if test -n "$clean"
	then
	clean_configure
	if test -n "$maintainer"
	then
	clean_autotools
	fi

	exit 0
	fi
	#
	# Validate the distribution.
	libpng_autotools_file_found=
	libpng_autotools_file_missing=
	for file in $libpng_autotools_files
	do
	if test -f "$file"
	then
	libpng_autotools_file_found=1
	else
	libpng_autotools_file_missing=1
	fi
	done
	#
	# Presence of one of these does not invalidate missing, but absence
	# invalidates found.
	for file in $libpng_libtool_files
	do
	if test ! -f "$file"
	then
	libpng_autotools_file_missing=1
	fi
	done
	#
	# The cache directory doesn't matter - it will be regenerated and does not exist
	# anyway in a tarball.
	#
	# Either everything is missing or everything is there, the --maintainer option
	# just changes this so that the mode is set to generate all the files.
	mode=
	if test -z "$libpng_autotools_file_found" -o -n "$maintainer"
	then
	mode="autoreconf"
	else
	if test -n "$libpng_autotools_file_missing"
	then
	mode="broken"
	else
	mode="configure"
	fi
	fi
	#
	# So:
	case "$mode" in
	autoreconf)
	# Clean in case configure files exist
	clean_configure
	clean_autotools
	# Everything must be initialized, so use --force
	if autoreconf --warnings=all --force --install
	then
	missing=
	for file in $libpng_autotools_files
	do
	test -f "$file" \|\| missing=1
	done
	# ignore the cache directory
	test -z "$missing" \|\| {
	exec >&2
	echo "autoreconf was run, but did not produce all the expected"
	echo "files. It is likely that your autotools installation is"
	echo "not compatible with that expected by libpng."
	exit 1
	}
	else
	exec >&2
	echo "autoreconf failed: your version of autotools is incompatible"
	echo "with this libpng version. Please use a distributed archive"
	echo "(which includes the autotools generated files) and run configure"
	echo "instead."
	exit 1
	fi;;

	configure)
	if test -d .git
	then
	exec >&2
	echo "ERROR: running autoreconf on an initialized sytem"
	echo " This is not necessary; it is only necessary to remake the"
	echo " autotools generated files if Makefile.am or configure.ac"
	echo " change and make does the right thing with:"
	echo
	echo " ./configure --enable-maintainer-mode."
	echo
	echo " You can run autoreconf yourself if you don't like maintainer"
	echo " mode and you can also just run autoreconf -f -i to initialize"
	echo " everything in the first place; this script is only for"
	echo " compatibility with prior releases."
	exit 1
	else
	exec >&2
	echo "autogen.sh is intended only to generate 'configure' on systems"
	echo "that do not have it. You have a complete 'configure', if you"
	echo "need to change Makefile.am or configure.ac you also need to"
	echo "run configure with the --enable-maintainer-mode option."
	exit 1
	fi;;

	broken)
	exec >&2
	echo "Your system has a partial set of autotools generated files."
	echo "autogen.sh is unable to proceed. The full set of files is"
	echo "contained in the libpng 'tar' distribution archive and you do"
	echo "not need to run autogen.sh if you use it."
	exit 1;;
	esac