1#! /bin/sh 2# 3# Run 'autoreconf' to build 'configure', 'Makefile.in' and other configure 4# control files. 5# 6# The first time this is run on a GIT checkout the only files that exist are 7# configure.ac and Makefile.am; all of the autotools support scripts are 8# missing. They are instantiated with autoreconf --force --install. 9# 10# For regular ("tarball") distributions all the files should exist. We do not 11# want them to be updated *under any circumstances*. It should never be 12# necessary to run autogen.sh because ./configure --enable-maintainer-mode says 13# what to do if Makefile.am or configure.ac are changed. 14# 15# It is *probably* OK to update the files on a GIT checkout, because they have 16# come from the local tools, but leave that to the user who is assumed to know 17# whether it is ok or required. 18# 19# This script is intended to work without arguments, there are, however, hidden 20# arguments (a) for use while testing the script and (b) to fix up systems that 21# have been broken. If (b) is required the script prompts for the correct 22# options. For this reason the options are *NOT* documented in the help; this 23# is deliberate; UTSL. 24# 25clean= 26maintainer= 27while test $# -gt 0 28do 29 case "$1" in 30 --maintainer) 31 maintainer=1;; 32 33 --clean) 34 clean=1;; 35 36 *) 37 exec >&2 38 echo "$0: usage: ./autogen.sh" 39 if test -d .git 40 then 41 echo " ./autogen.sh generates the configure script and" 42 echo " Makefile.in, or refreshes them after changes to Makefile.am" 43 echo " or configure.ac. You may prefer to just run autoreconf." 44 elif test -z "$maintainer" 45 then 46 echo " DO NOT RUN THIS SCRIPT." 47 echo " If you need to change Makefile.am or configure.ac then you" 48 echo " also need to run ./configure --enable-maintainer-mode and" 49 echo " use the appropriate autotools, *NOT* this script, to update" 50 echo " everything, please check the documentation of autoreconf." 51 echo " WARNING: libpng is intentionally generated with a known," 52 echo " fixed, set of autotools. It is known *NOT* to work with" 53 echo " the collection of autotools distributed on highly reputable" 54 echo " operating systems." 55 echo " Remember: autotools is GNU software, you are expected to" 56 echo " pay for support." 57 else 58 echo " You have run autogen.sh with --maintainer enabled and you" 59 echo " are not using a GIT distribution, then you have given an" 60 echo " unrecognized argument. This is not good. --maintainer" 61 echo " switches off any assumptions that you might not know what" 62 echo " you are doing." 63 fi 64 exit 1;; 65 esac 66 67 shift 68done 69# 70# First check for a set of the autotools files; if absent then this is assumed 71# to be a GIT version and the local autotools must be used. If present this 72# is a tarball distribution and the script should not be used. If partially 73# present bad things are happening. 74# 75# The autotools generated files: 76libpng_autotools_files="Makefile.in aclocal.m4 config.guess config.h.in 77 config.sub configure depcomp install-sh ltmain.sh missing\ 78 test-driver" 79# 80# Files generated by versions of configue >2.68 or automake >1.13 (i.e. later 81# versions than those required by configure.ac): 82libpng_autotools_extra="compile config.h.in~" 83# 84# These are separate because 'maintainer-clean' does not remove them. 85libpng_libtool_files="scripts/libtool.m4 scripts/ltoptions.m4\ 86 scripts/ltsugar.m4 scripts/ltversion.m4 scripts/lt~obsolete.m4" 87 88libpng_autotools_dirs="autom4te.cache" # not required 89# 90# The configure generated files: 91libpng_configure_files="Makefile config.h config.log config.status\ 92 libpng-config libpng.pc libtool stamp-h1" 93 94libpng_configure_dirs=".deps" 95# 96# We must remove the configure generated files as well as the autotools 97# generated files if autotools are regenerated because otherwise if configure 98# has been run without "--enable-maintainer-mode" make can do a partial update 99# of Makefile. These functions do the two bits of cleaning. 100clean_autotools(){ 101 rm -rf $libpng_autotools_files $libpng_libtool_files $libpng_autotools_dirs 102 rm -rf $libpng_autotools_extra 103} 104 105clean_configure(){ 106 rm -rf $libpng_configure_files $libpng_configure_dirs 107} 108# 109# Clean: remove everything (this is to help with testing) 110if test -n "$clean" 111then 112 clean_configure 113 if test -n "$maintainer" 114 then 115 clean_autotools 116 fi 117 118 exit 0 119fi 120# 121# Validate the distribution. 122libpng_autotools_file_found= 123libpng_autotools_file_missing= 124for file in $libpng_autotools_files 125do 126 if test -f "$file" 127 then 128 libpng_autotools_file_found=1 129 else 130 libpng_autotools_file_missing=1 131 fi 132done 133# 134# Presence of one of these does not *invalidate* missing, but absence 135# invalidates found. 136for file in $libpng_libtool_files 137do 138 if test ! -f "$file" 139 then 140 libpng_autotools_file_missing=1 141 fi 142done 143# 144# The cache directory doesn't matter - it will be regenerated and does not exist 145# anyway in a tarball. 146# 147# Either everything is missing or everything is there, the --maintainer option 148# just changes this so that the mode is set to generate all the files. 149mode= 150if test -z "$libpng_autotools_file_found" -o -n "$maintainer" 151then 152 mode="autoreconf" 153else 154 if test -n "$libpng_autotools_file_missing" 155 then 156 mode="broken" 157 else 158 mode="configure" 159 fi 160fi 161# 162# So: 163case "$mode" in 164 autoreconf) 165 # Clean in case configure files exist 166 clean_configure 167 clean_autotools 168 # Everything must be initialized, so use --force 169 if autoreconf --warnings=all --force --install 170 then 171 missing= 172 for file in $libpng_autotools_files 173 do 174 test -f "$file" || missing=1 175 done 176 # ignore the cache directory 177 test -z "$missing" || { 178 exec >&2 179 echo "autoreconf was run, but did not produce all the expected" 180 echo "files. It is likely that your autotools installation is" 181 echo "not compatible with that expected by libpng." 182 exit 1 183 } 184 else 185 exec >&2 186 echo "autoreconf failed: your version of autotools is incompatible" 187 echo "with this libpng version. Please use a distributed archive" 188 echo "(which includes the autotools generated files) and run configure" 189 echo "instead." 190 exit 1 191 fi;; 192 193 configure) 194 if test -d .git 195 then 196 exec >&2 197 echo "ERROR: running autoreconf on an initialized sytem" 198 echo " This is not necessary; it is only necessary to remake the" 199 echo " autotools generated files if Makefile.am or configure.ac" 200 echo " change and make does the right thing with:" 201 echo 202 echo " ./configure --enable-maintainer-mode." 203 echo 204 echo " You can run autoreconf yourself if you don't like maintainer" 205 echo " mode and you can also just run autoreconf -f -i to initialize" 206 echo " everything in the first place; this script is only for" 207 echo " compatibility with prior releases." 208 exit 1 209 else 210 exec >&2 211 echo "autogen.sh is intended only to generate 'configure' on systems" 212 echo "that do not have it. You have a complete 'configure', if you" 213 echo "need to change Makefile.am or configure.ac you also need to" 214 echo "run configure with the --enable-maintainer-mode option." 215 exit 1 216 fi;; 217 218 broken) 219 exec >&2 220 echo "Your system has a partial set of autotools generated files." 221 echo "autogen.sh is unable to proceed. The full set of files is" 222 echo "contained in the libpng 'tar' distribution archive and you do" 223 echo "not need to run autogen.sh if you use it." 224 exit 1;; 225esac 226