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      1 # genout.cmake.in
      2 # Generate .out from .c with awk (generic), 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(CMAKE_C_COMPILER "@CMAKE_C_COMPILER@")
     17 set(CMAKE_C_FLAGS "@CMAKE_C_FLAGS@")
     18 set(INCDIR "@CMAKE_CURRENT_BINARY_DIR@")
     19 set(PNG_PREFIX "@PNG_PREFIX@")
     20 set(PNGLIB_MAJOR "@PNGLIB_MAJOR@")
     21 set(PNGLIB_MINOR "@PNGLIB_MINOR@")
     22 set(PNGLIB_VERSION "@PNGLIB_VERSION@")
     23 set(ZLIBINCDIR "@ZLIB_INCLUDE_DIR@")
     24 
     25 get_filename_component(INPUTEXT "${INPUT}" EXT)
     26 get_filename_component(OUTPUTEXT "${OUTPUT}" EXT)
     27 get_filename_component(INPUTBASE "${INPUT}" NAME_WE)
     28 get_filename_component(OUTPUTBASE "${OUTPUT}" NAME_WE)
     29 get_filename_component(INPUTDIR "${INPUT}" PATH)
     30 get_filename_component(OUTPUTDIR "${OUTPUT}" PATH)
     31 
     32 if ("${INPUTEXT}" STREQUAL ".c" AND "${OUTPUTEXT}" STREQUAL ".out")
     33   get_filename_component(GENDIR "${OUTPUT}" PATH)
     34   file(MAKE_DIRECTORY "${GENDIR}")
     35 
     36   file(REMOVE "${OUTPUT}.tf1" "${OUTPUT}.tf2")
     37 
     38   set(INCLUDES "-I${INCDIR}")
     39   if(ZLIBINCDIR)
     40     list(APPEND INCLUDES "-I${ZLIBINCDIR}")
     41   endif()
     42 
     43   if(PNG_PREFIX)
     44     set(PNG_PREFIX_DEF "-DPNG_PREFIX=${PNG_PREFIX}")
     45   endif()
     46 
     47   execute_process(COMMAND "${CMAKE_C_COMPILER}" "-E"
     48                           ${CMAKE_C_FLAGS}
     49                           "-I${SRCDIR}"
     50                           "-I${BINDIR}"
     51                           ${INCLUDES}
     52                           "-DPNGLIB_LIBNAME=PNG${PNGLIB_MAJOR}${PNGLIB_MINOR}_0"
     53                           "-DPNGLIB_VERSION=${PNGLIB_VERSION}"
     54                           "-DSYMBOL_PREFIX=${SYMBOL_PREFIX}"
     55                           "-DPNG_NO_USE_READ_MACROS"
     56                           "-DPNG_BUILDING_SYMBOL_TABLE"
     57                           ${PNG_PREFIX_DEF}
     58                           "${INPUT}"
     59                   OUTPUT_FILE "${OUTPUT}.tf1"
     60                   WORKING_DIRECTORY "${BINDIR}"
     61                   RESULT_VARIABLE CPP_FAIL)
     62   if(CPP_FAIL)
     63     message(FATAL_ERROR "Failed to generate ${OUTPUT}.tf1")
     64   endif()
     65 
     66   execute_process(COMMAND "${AWK}" -f "${SRCDIR}/scripts/dfn.awk"
     67                           "out=${OUTPUT}.tf2" "${OUTPUT}.tf1"
     68                   WORKING_DIRECTORY "${BINDIR}"
     69                   RESULT_VARIABLE AWK_FAIL)
     70   if(AWK_FAIL)
     71     message(FATAL_ERROR "Failed to generate ${OUTPUT}.tf2")
     72   endif()
     73 
     74   file(REMOVE "${OUTPUT}.tf1")
     75   file(RENAME "${OUTPUT}.tf2" "${OUTPUT}")
     76 else()
     77   message(FATAL_ERROR "Unsupported conversion: ${INPUTEXT} to ${OUTPUTEXT}")
     78 endif()
     79