kc3-lang/libpng/scripts/gensrc.cmake.in

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• Hash : acfd50ae
  Author :
  Date : 2023-12-11T20:51:06
  

  cmake: Clean up functions, string operations, regular expressions, etc.
  
  Remove the inclusion of the external module `CMakeParseArguments`.
  Function argument parsing became a first-class feature in CMake 3.5.
  
  Delete the function `find_symbol_prefix`. It is no longer used.
  
  Use variables instead of strings in string operations where possible.
  Prevent CMake from getting confused by string values that might be
  accidentally identical to unrelated keywords.
  
  Clean up spurious `.*` sequences in regex matching operations.
  
  Rephrase a comment.
  

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• scripts/gensrc.cmake.in

• # gensrc.cmake.in
  # Generate source files with awk, based upon the automake logic.
  
  # Copyright (c) 2022-2023 Cosmin Truta
  # Copyright (c) 2016 Glenn Randers-Pehrson
  # Written by Roger Leigh, 2016
  
  # This code is released under the libpng license.
  # For conditions of distribution and use, see the disclaimer
  # and license in png.h
  
  # Variables substituted from CMakeLists.txt
  set(SRCDIR "@CMAKE_CURRENT_SOURCE_DIR@")
  set(BINDIR "@CMAKE_CURRENT_BINARY_DIR@")
  
  set(AWK "@AWK@")
  set(DFA_XTRA "@DFA_XTRA@")
  set(PNG_PREFIX "@PNG_PREFIX@")
  set(PNGLIB_VERSION "@PNGLIB_VERSION@")
  
  if(OUTPUT STREQUAL "scripts/pnglibconf.c")
    # Generate scripts/pnglibconf.c
  
    file(REMOVE "${BINDIR}/pnglibconf.tf6" "${BINDIR}/pnglibconf.tf7")
  
    execute_process(COMMAND "${CMAKE_COMMAND}" -E echo "com ${PNGLIB_VERSION} STANDARD API DEFINITION"
                    COMMAND "${AWK}" -f "${SRCDIR}/scripts/options.awk"
                            "out=pnglibconf.tf6" "logunsupported=1" "version=search"
                            "${SRCDIR}/pngconf.h" "-"
                            "${SRCDIR}/scripts/pnglibconf.dfa"
                    WORKING_DIRECTORY "${BINDIR}"
                    RESULT_VARIABLE AWK_FAIL)
    if(AWK_FAIL)
      message(FATAL_ERROR "Failed to generate pnglibconf.tf6")
    endif()
  
    execute_process(COMMAND "${AWK}" -f "${SRCDIR}/scripts/options.awk"
                    "out=pnglibconf.tf7" "pnglibconf.tf6"
                    WORKING_DIRECTORY "${BINDIR}"
                    RESULT_VARIABLE AWK_FAIL)
    if(AWK_FAIL)
      message(FATAL_ERROR "Failed to generate pnglibconf.tf7")
    endif()
  
    file(REMOVE "pnglibconf.tf6")
    file(MAKE_DIRECTORY "${BINDIR}/scripts")
    file(RENAME "pnglibconf.tf7" "${BINDIR}/scripts/pnglibconf.c")
  
  elseif(OUTPUT STREQUAL "pnglibconf.c")
    # Generate pnglibconf.c
  
    file(REMOVE "${BINDIR}/pnglibconf.tf4" "${BINDIR}/pnglibconf.tf5")
  
    execute_process(COMMAND "${AWK}" -f "${SRCDIR}/scripts/options.awk"
                    out=pnglibconf.tf4 version=search
                    ${SRCDIR}/pngconf.h ${SRCDIR}/scripts/pnglibconf.dfa
                    ${SRCDIR}/pngusr.dfa ${DFA_XTRA}
                    WORKING_DIRECTORY "${BINDIR}"
                    RESULT_VARIABLE AWK_FAIL)
    if(AWK_FAIL)
      message(FATAL_ERROR "Failed to generate pnglibconf.tf4")
    endif()
  
    execute_process(COMMAND "${AWK}" -f "${SRCDIR}/scripts/options.awk"
                    out=pnglibconf.tf5 pnglibconf.tf4
                    WORKING_DIRECTORY "${BINDIR}"
                    RESULT_VARIABLE AWK_FAIL)
    if(AWK_FAIL)
      message(FATAL_ERROR "Failed to generate pnglibconf.tf5")
    endif()
  
    file(REMOVE "pnglibconf.tf4")
    file(MAKE_DIRECTORY "${BINDIR}/scripts")
    file(RENAME "pnglibconf.tf5" "${BINDIR}/pnglibconf.c")
  
  elseif(OUTPUT STREQUAL "pnglibconf.h")
    # Generate pnglibconf.h
  
    file(REMOVE "${BINDIR}/${OUTPUT}")
    if(PNG_PREFIX)
      file(REMOVE "pnglibconf.tf8")
  
      execute_process(COMMAND "${AWK}" "s==0 && NR>1{print prev}
                               s==0{prev=\$0}
                               s==1{print \"#define\", \$1, \"${PNG_PREFIX}\" \$1}
                               s==2{print \"#define ${PNG_PREFIX}png_\" \$1, \"PNG_\" \$1}
                               END{print prev}" s=0 pnglibconf.out s=1 "${BINDIR}/scripts/prefix.out"
                               s=2 "${SRCDIR}/scripts/macro.lst"
                      OUTPUT_FILE pnglibconf.tf8
                      RESULT_VARIABLE AWK_FAIL)
      if(AWK_FAIL)
        message(FATAL_ERROR "Failed to generate pnglibconf.tf8")
      endif()
  
      file(RENAME "pnglibconf.tf8" "${BINDIR}/${OUTPUT}")
    else()
      execute_process(COMMAND "${CMAKE_COMMAND}" -E copy "${BINDIR}/pnglibconf.out"
                                                         "${BINDIR}/${OUTPUT}"
                      RESULT_VARIABLE COPY_FAIL)
      if(COPY_FAIL)
        message(FATAL_ERROR "Failed to create pnglibconf.h")
      endif()
    endif()
  
  elseif(OUTPUT STREQUAL "pngprefix.h")
    # Generate pngprefix.h
  
    file(REMOVE "${BINDIR}/${OUTPUT}")
  
    if(PNG_PREFIX)
      file(REMOVE "pngprefix.tf1")
  
      execute_process(COMMAND "${AWK}"
                              "{print \"#define\", \$1, \"${PNG_PREFIX}\" \$1}"
                              "${BINDIR}/scripts/intprefix.out"
                      OUTPUT_FILE "pngprefix.tf1"
                      RESULT_VARIABLE AWK_FAIL)
      if(AWK_FAIL)
        message(FATAL_ERROR "Failed to generate pngprefix.tf1")
      endif()
  
      file(RENAME "pngprefix.tf1" "${BINDIR}/${OUTPUT}")
    else()
      file(WRITE "${BINDIR}/${OUTPUT}" "/* No libpng symbol prefix configured. */")
    endif()
  
  elseif(OUTPUT STREQUAL "scripts/pnglibconf.h.prebuilt")
    # Generate scripts/pnglibconf.h.prebuilt (fails build)
  
    message(STATUS "Attempting to build scripts/pnglibconf.h.prebuilt")
    message(STATUS "This is a machine generated file, but if you want to make")
    message(STATUS "a new one simply build the 'png_genfiles' target, and copy")
    message(STATUS "scripts/pnglibconf.out to scripts/pnglibconf.h.prebuilt")
    message(STATUS "AND set PNG_ZLIB_VERNUM to 0 (you MUST do this)")
    message(FATAL_ERROR "Stopping build")
  
  else()
    message(FATAL_ERROR "Unsupported output: ${OUTPUT}")
  endif()
  

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