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 # 25 clean= 26 maintainer= 27 while test $# -gt 0 28 do 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 68 done 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: 76 libpng_autotools_files="Makefile.in aclocal.m4 config.guess config.h.in\ 77 config.sub configure depcomp install-sh ltmain.sh missing test-driver" 78 # 79 # Files generated by versions of configue >2.68 or automake >1.13 (i.e. later 80 # versions than those required by configure.ac): 81 libpng_autotools_extra="compile" 82 # 83 # These are separate because 'maintainer-clean' does not remove them. 84 libpng_libtool_files="scripts/libtool.m4 scripts/ltoptions.m4\ 85 scripts/ltsugar.m4 scripts/ltversion.m4 scripts/lt~obsolete.m4" 86 87 libpng_autotools_dirs="autom4te.cache" # not required 88 # 89 # The configure generated files: 90 libpng_configure_files="Makefile config.h config.log config.status\ 91 libpng-config libpng.pc libtool stamp-h1" 92 93 libpng_configure_dirs=".deps" 94 # 95 # We must remove the configure generated files as well as the autotools 96 # generated files if autotools are regenerated because otherwise if configure 97 # has been run without "--enable-maintainer-mode" make can do a partial update 98 # of Makefile. These functions do the two bits of cleaning. 99 clean_autotools(){ 100 rm -rf $libpng_autotools_files $libpng_libtool_files $libpng_autotools_dirs 101 rm -rf $libpng_autotools_extra 102 } 103 104 clean_configure(){ 105 rm -rf $libpng_configure_files $libpng_configure_dirs 106 } 107 # 108 # Clean: remove everything (this is to help with testing) 109 if test -n "$clean" 110 then 111 clean_configure 112 if test -n "$maintainer" 113 then 114 clean_autotools 115 fi 116 117 exit 0 118 fi 119 # 120 # Validate the distribution. 121 libpng_autotools_file_found= 122 libpng_autotools_file_missing= 123 for file in $libpng_autotools_files 124 do 125 if test -f "$file" 126 then 127 libpng_autotools_file_found=1 128 else 129 libpng_autotools_file_missing=1 130 fi 131 done 132 # 133 # Presence of one of these does not *invalidate* missing, but absence 134 # invalidates found. 135 for file in $libpng_libtool_files 136 do 137 if test ! -f "$file" 138 then 139 libpng_autotools_file_missing=1 140 fi 141 done 142 # 143 # The cache directory doesn't matter - it will be regenerated and does not exist 144 # anyway in a tarball. 145 # 146 # Either everything is missing or everything is there, the --maintainer option 147 # just changes this so that the mode is set to generate all the files. 148 mode= 149 if test -z "$libpng_autotools_file_found" -o -n "$maintainer" 150 then 151 mode="autoreconf" 152 else 153 if test -n "$libpng_autotools_file_missing" 154 then 155 mode="broken" 156 else 157 mode="configure" 158 fi 159 fi 160 # 161 # So: 162 case "$mode" in 163 autoreconf) 164 # Clean in case configure files exist 165 clean_configure 166 clean_autotools 167 # Everything must be initialized, so use --force 168 if autoreconf --warnings=all --force --install 169 then 170 missing= 171 for file in $libpng_autotools_files 172 do 173 test -f "$file" || missing=1 174 done 175 # ignore the cache directory 176 test -z "$missing" || { 177 exec >&2 178 echo "autoreconf was run, but did not produce all the expected" 179 echo "files. It is likely that your autotools installation is" 180 echo "not compatible with that expected by libpng." 181 exit 1 182 } 183 else 184 exec >&2 185 echo "autoreconf failed: your version of autotools is incompatible" 186 echo "with this libpng version. Please use a distributed archive" 187 echo "(which includes the autotools generated files) and run configure" 188 echo "instead." 189 exit 1 190 fi;; 191 192 configure) 193 if test -d .git 194 then 195 exec >&2 196 echo "ERROR: running autoreconf on an initialized sytem" 197 echo " This is not necessary; it is only necessary to remake the" 198 echo " autotools generated files if Makefile.am or configure.ac" 199 echo " change and make does the right thing with:" 200 echo 201 echo " ./configure --enable-maintainer-mode." 202 echo 203 echo " You can run autoreconf yourself if you don't like maintainer" 204 echo " mode and you can also just run autoreconf -f -i to initialize" 205 echo " everything in the first place; this script is only for" 206 echo " compatibility with prior releases." 207 exit 1 208 else 209 exec >&2 210 echo "autogen.sh is intended only to generate 'configure' on systems" 211 echo "that do not have it. You have a complete 'configure', if you" 212 echo "need to change Makefile.am or configure.ac you also need to" 213 echo "run configure with the --enable-maintainer-mode option." 214 exit 1 215 fi;; 216 217 broken) 218 exec >&2 219 echo "Your system has a partial set of autotools generated files." 220 echo "autogen.sh is unable to proceed. The full set of files is" 221 echo "contained in the libpng 'tar' distribution archive and you do" 222 echo "not need to run autogen.sh if you use it." 223 exit 1;; 224 esac 225
