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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 set(PLATFORM_C_FLAGS)
     26 if(APPLE)
     27   set(CMAKE_OSX_ARCHITECTURES "@CMAKE_OSX_ARCHITECTURES@")
     28   set(CMAKE_OSX_SYSROOT "@CMAKE_OSX_SYSROOT@")
     29   if(CMAKE_OSX_ARCHITECTURES)
     30     set(PLATFORM_C_FLAGS ${PLATFORM_C_FLAGS} -arch ${CMAKE_OSX_ARCHITECTURES})
     31   endif()
     32   if(CMAKE_OSX_SYSROOT)
     33     set(PLATFORM_C_FLAGS ${PLATFORM_C_FLAGS} -isysroot ${CMAKE_OSX_SYSROOT})
     34   endif()
     35 endif()
     36 
     37 get_filename_component(INPUTEXT "${INPUT}" EXT)
     38 get_filename_component(OUTPUTEXT "${OUTPUT}" EXT)
     39 get_filename_component(INPUTBASE "${INPUT}" NAME_WE)
     40 get_filename_component(OUTPUTBASE "${OUTPUT}" NAME_WE)
     41 get_filename_component(INPUTDIR "${INPUT}" PATH)
     42 get_filename_component(OUTPUTDIR "${OUTPUT}" PATH)
     43 
     44 if ("${INPUTEXT}" STREQUAL ".c" AND "${OUTPUTEXT}" STREQUAL ".out")
     45   get_filename_component(GENDIR "${OUTPUT}" PATH)
     46   file(MAKE_DIRECTORY "${GENDIR}")
     47 
     48   file(REMOVE "${OUTPUT}.tf1" "${OUTPUT}.tf2")
     49 
     50   set(INCLUDES "-I${INCDIR}")
     51   if(ZLIBINCDIR)
     52     foreach(dir ${ZLIBINCDIR})
     53       list(APPEND INCLUDES "-I${dir}")
     54     endforeach()
     55   endif()
     56 
     57   if(PNG_PREFIX)
     58     set(PNG_PREFIX_DEF "-DPNG_PREFIX=${PNG_PREFIX}")
     59   endif()
     60 
     61   execute_process(COMMAND "${CMAKE_C_COMPILER}" "-E"
     62                           ${CMAKE_C_FLAGS}
     63                           ${PLATFORM_C_FLAGS}
     64                           "-I${SRCDIR}"
     65                           "-I${BINDIR}"
     66                           ${INCLUDES}
     67                           "-DPNGLIB_LIBNAME=PNG${PNGLIB_MAJOR}${PNGLIB_MINOR}_0"
     68                           "-DPNGLIB_VERSION=${PNGLIB_VERSION}"
     69                           "-DSYMBOL_PREFIX=${SYMBOL_PREFIX}"
     70                           "-DPNG_NO_USE_READ_MACROS"
     71                           "-DPNG_BUILDING_SYMBOL_TABLE"
     72                           ${PNG_PREFIX_DEF}
     73                           "${INPUT}"
     74                   OUTPUT_FILE "${OUTPUT}.tf1"
     75                   WORKING_DIRECTORY "${BINDIR}"
     76                   RESULT_VARIABLE CPP_FAIL)
     77   if(CPP_FAIL)
     78     message(FATAL_ERROR "Failed to generate ${OUTPUT}.tf1")
     79   endif()
     80 
     81   execute_process(COMMAND "${AWK}" -f "${SRCDIR}/scripts/dfn.awk"
     82                           "out=${OUTPUT}.tf2" "${OUTPUT}.tf1"
     83                   WORKING_DIRECTORY "${BINDIR}"
     84                   RESULT_VARIABLE AWK_FAIL)
     85   if(AWK_FAIL)
     86     message(FATAL_ERROR "Failed to generate ${OUTPUT}.tf2")
     87   endif()
     88 
     89   file(REMOVE "${OUTPUT}.tf1")
     90   file(RENAME "${OUTPUT}.tf2" "${OUTPUT}")
     91 else()
     92   message(FATAL_ERROR "Unsupported conversion: ${INPUTEXT} to ${OUTPUTEXT}")
     93 endif()
     94