1 2 usage() 3 { 4 cat <<EOF 5 Usage: libpng-config [OPTION] ... 6 7 Known values for OPTION are: 8 9 --prefix print libpng prefix 10 --libdir print path to directory containing library 11 --libs print library linking information 12 --ccopts print compiler options 13 --cppflags print pre-processor flags 14 --cflags print preprocessor flags, I_opts, and compiler options 15 --I_opts print "-I" include options 16 --L_opts print linker "-L" flags for dynamic linking 17 --R_opts print dynamic linker "-R" or "-rpath" flags 18 --ldopts print linker options 19 --ldflags print linker flags (ldopts, L_opts, R_opts, and libs) 20 --static revise subsequent outputs for static linking 21 --help print this help and exit 22 --version print version information 23 EOF 24 25 exit $1 26 } 27 28 if test $# -eq 0; then 29 usage 1 30 fi 31 32 while test $# -gt 0; do 33 case "$1" in 34 35 --prefix) 36 echo ${prefix} 37 ;; 38 39 --version) 40 echo ${version} 41 exit 0 42 ;; 43 44 --help) 45 usage 0 46 ;; 47 48 --ccopts) 49 echo ${ccopts} 50 ;; 51 52 --cppflags) 53 echo ${cppflags} 54 ;; 55 56 --cflags) 57 echo ${I_opts} ${cppflags} ${ccopts} 58 ;; 59 60 --libdir) 61 echo ${libdir} 62 ;; 63 64 --libs) 65 echo ${libs} 66 ;; 67 68 --I_opts) 69 echo ${I_opts} 70 ;; 71 72 --L_opts) 73 echo ${L_opts} 74 ;; 75 76 --R_opts) 77 echo ${R_opts} 78 ;; 79 80 --ldflags) 81 echo ${ldflags} ${L_opts} ${R_opts} ${libs} 82 ;; 83 84 --static) 85 R_opts="" 86 ;; 87 88 *) 89 usage 90 exit 1 91 ;; 92 esac 93 shift 94 done 95 96 exit 0 97
