1 # gensrc.cmake.in 2 # Generate source files with awk, based upon the automake logic. 3 4 # Copyright (C) 2016 Glenn Randers-Pehrson 5 # Written by Roger Leigh, 2016 6 7 # This code is released under the libpng license. 8 # For conditions of distribution and use, see the disclaimer 9 # and license in png.h 10 11 # Variables substituted from CMakeLists.txt 12 set(SRCDIR "@CMAKE_CURRENT_SOURCE_DIR@") 13 set(BINDIR "@CMAKE_CURRENT_BINARY_DIR@") 14 15 set(AWK "@AWK@") 16 set(DFA_XTRA "@DFA_XTRA@") 17 set(PNG_PREFIX "@PNG_PREFIX@") 18 set(PNGLIB_VERSION "@PNGLIB_VERSION@") 19 20 if("${OUTPUT}" STREQUAL "scripts/pnglibconf.c") 21 # Generate scripts/pnglibconf.c 22 23 file(REMOVE "${BINDIR}/pnglibconf.tf6" "${BINDIR}/pnglibconf.tf7") 24 25 execute_process(COMMAND "${CMAKE_COMMAND}" -E echo "com ${PNGLIB_VERSION} STANDARD API DEFINITION" 26 COMMAND "${AWK}" -f "${SRCDIR}/scripts/options.awk" 27 "out=pnglibconf.tf6" "logunsupported=1" "version=search" 28 "${SRCDIR}/pngconf.h" "-" 29 "${SRCDIR}/scripts/pnglibconf.dfa" 30 WORKING_DIRECTORY "${BINDIR}" 31 RESULT_VARIABLE AWK_FAIL) 32 if(AWK_FAIL) 33 message(FATAL_ERROR "Failed to generate pnglibconf.tf6") 34 endif() 35 36 execute_process(COMMAND "${AWK}" -f "${SRCDIR}/scripts/options.awk" 37 "out=pnglibconf.tf7" "pnglibconf.tf6" 38 WORKING_DIRECTORY "${BINDIR}" 39 RESULT_VARIABLE AWK_FAIL) 40 if(AWK_FAIL) 41 message(FATAL_ERROR "Failed to generate pnglibconf.tf7") 42 endif() 43 44 file(REMOVE "pnglibconf.tf6") 45 file(MAKE_DIRECTORY "${BINDIR}/scripts") 46 file(RENAME "pnglibconf.tf7" "${BINDIR}/scripts/pnglibconf.c") 47 48 elseif ("${OUTPUT}" STREQUAL "pnglibconf.c") 49 # Generate pnglibconf.c 50 51 file(REMOVE "${BINDIR}/pnglibconf.tf4" "${BINDIR}/pnglibconf.tf5") 52 53 execute_process(COMMAND "${AWK}" -f "${SRCDIR}/scripts/options.awk" 54 out=pnglibconf.tf4 version=search 55 ${SRCDIR}/pngconf.h ${SRCDIR}/scripts/pnglibconf.dfa 56 ${SRCDIR}/pngusr.dfa ${DFA_XTRA} 57 WORKING_DIRECTORY "${BINDIR}" 58 RESULT_VARIABLE AWK_FAIL) 59 if(AWK_FAIL) 60 message(FATAL_ERROR "Failed to generate pnglibconf.tf4") 61 endif() 62 63 execute_process(COMMAND "${AWK}" -f "${SRCDIR}/scripts/options.awk" 64 out=pnglibconf.tf5 pnglibconf.tf4 65 WORKING_DIRECTORY "${BINDIR}" 66 RESULT_VARIABLE AWK_FAIL) 67 if(AWK_FAIL) 68 message(FATAL_ERROR "Failed to generate pnglibconf.tf5") 69 endif() 70 71 file(REMOVE "pnglibconf.tf4") 72 file(MAKE_DIRECTORY "${BINDIR}/scripts") 73 file(RENAME "pnglibconf.tf5" "${BINDIR}/pnglibconf.c") 74 75 elseif ("${OUTPUT}" STREQUAL "pnglibconf.h") 76 # Generate pnglibconf.h 77 78 file(REMOVE "${BINDIR}/${OUTPUT}") 79 if(PNG_PREFIX) 80 file(REMOVE "pnglibconf.tf8") 81 82 execute_process(COMMAND "${AWK}" "s==0 && NR>1{print prev} 83 s==0{prev=\$0} 84 s==1{print \"#define\", \$1, \"${PNG_PREFIX}\" \$1} 85 s==2{print \"#define ${PNG_PREFIX}png_\" \$1, \"PNG_\" \$1} 86 END{print prev}" s=0 pnglibconf.out s=1 "${BINDIR}/scripts/prefix.out" 87 s=2 "${SRCDIR}/scripts/macro.lst" 88 OUTPUT_FILE pnglibconf.tf8 89 RESULT_VARIABLE AWK_FAIL) 90 if(AWK_FAIL) 91 message(FATAL_ERROR "Failed to generate pnglibconf.tf8") 92 endif() 93 94 file(RENAME "pnglibconf.tf8" "${BINDIR}/${OUTPUT}") 95 else() 96 execute_process(COMMAND "${CMAKE_COMMAND}" -E copy "${BINDIR}/pnglibconf.out" 97 "${BINDIR}/${OUTPUT}" 98 RESULT_VARIABLE COPY_FAIL) 99 if(COPY_FAIL) 100 message(FATAL_ERROR "Failed to create pnglibconf.h") 101 endif() 102 endif() 103 104 elseif ("${OUTPUT}" STREQUAL "pngprefix.h") 105 # Generate pngprefix.h 106 107 file(REMOVE "${BINDIR}/${OUTPUT}") 108 109 if(PNG_PREFIX) 110 file(REMOVE "pngprefix.tf1") 111 112 execute_process(COMMAND "${AWK}" 113 "{print \"#define\", \$1, \"${PNG_PREFIX}\" \$1}" 114 "${BINDIR}/scripts/intprefix.out" 115 OUTPUT_FILE "pngprefix.tf1" 116 RESULT_VARIABLE AWK_FAIL) 117 if(AWK_FAIL) 118 message(FATAL_ERROR "Failed to generate pngprefix.tf1") 119 endif() 120 121 file(RENAME "pngprefix.tf1" "${BINDIR}/${OUTPUT}") 122 else() 123 file(WRITE "${BINDIR}/${OUTPUT}" "/* No libpng symbol prefix configured. */") 124 endif() 125 126 elseif("${OUTPUT}" STREQUAL "scripts/pnglibconf.h.prebuilt") 127 # Generate scripts/pnglibconf.h.prebuilt (fails build) 128 129 message(STATUS "Attempting to build scripts/pnglibconf.h.prebuilt") 130 message(STATUS "This is a machine generated file, but if you want to make") 131 message(STATUS "a new one simply build the 'genfiles' target, and copy") 132 message(STATUS "scripts/pnglibconf.out to scripts/pnglibconf.h.prebuilt") 133 message(STATUS "AND set PNG_ZLIB_VERNUM to 0 (you MUST do this)") 134 message(FATAL_ERROR "Stopping build") 135 136 else() 137 message(FATAL_ERROR "Unsupported output: ${OUTPUT}") 138 endif() 139
