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# gensrc.cmake.in
# Generate source files with awk, based upon the automake logic.
# 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 '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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