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#
# Generate version numbers and configure header files
#
# Copyright 1998-2025 by Bill Spitzak and others.
#
# This library is free software. Distribution and use rights are outlined in
# the file "COPYING" which should have been included with this file. If this
# file is missing or damaged, see the license at:
#
# https://www.fltk.org/COPYING.php
#
# Please see the following page on how to report bugs and issues:
#
# https://www.fltk.org/bugs.php
#
#######################################################################
# Calculate limits and check FL_ABI_VERSION syntax
#######################################################################
# Initialize FL_ABI_VERSION
set(FL_ABI_VERSION "${FLTK_ABI_VERSION}")
# These are the limits (min/max) FL_ABI_VERSION is allowed to have
math(EXPR abi_version_min "${FLTK_VERSION_MAJOR} * 10000 + ${FLTK_VERSION_MINOR} * 100")
math(EXPR abi_version_max "${abi_version_min} + ${FLTK_VERSION_PATCH} + 1")
if(FL_ABI_VERSION STREQUAL "")
# no version set, silently use default
set(FL_ABI_VERSION "${abi_version_min}")
else()
# check syntax of reuested ABI version (five digits)
string(REGEX MATCH "[1-9][0-9][0-9][0-9][0-9]" reg_match "${FL_ABI_VERSION}")
if(NOT reg_match STREQUAL "${FL_ABI_VERSION}")
message(STATUS "FLTK_ABI_VERSION \"${FLTK_ABI_VERSION}\" is invalid. Using default = ${abi_version_min}")
set(FL_ABI_VERSION "${abi_version_min}")
endif()
# check minor version (first three numbers must match)
string(SUBSTRING "${abi_version_min}" 0 3 abi_version_minor)
string(SUBSTRING "${FL_ABI_VERSION}" 0 3 abi_version_temp)
if(NOT abi_version_temp STREQUAL ${abi_version_minor})
set(FL_ABI_VERSION "${abi_version_min}")
message(STATUS "FLTK_ABI_VERSION \"${FLTK_ABI_VERSION}\" doesn't match minor version. Using default = ${abi_version_min}")
set(FL_ABI_VERSION "${abi_version_min}")
endif()
endif()
if(FL_ABI_VERSION STRLESS ${abi_version_min})
# should never happen
set(FL_ABI_VERSION "${abi_version_min}")
elseif(FL_ABI_VERSION STRGREATER ${abi_version_max})
# accept w/o warning
set(FL_ABI_VERSION "${abi_version_max}")
endif()
# reset all temporary variables
unset(abi_version_min)
unset(abi_version_max)
unset(abi_version_minor)
unset(abi_version_temp)
unset(reg_match)
#######################################################################
# configure the header file "FL/fl_config.h" in the build tree
#######################################################################
configure_file(
${CMAKE_CURRENT_SOURCE_DIR}/fl_config.h.in
${CMAKE_CURRENT_BINARY_DIR}/FL/fl_config.h
@ONLY
)
#######################################################################
# generate the header file "config.h" in the build tree
#######################################################################
# prepare some variables for config.h
if(IS_ABSOLUTE "${FLTK_DATADIR}")
set(PREFIX_DATA "${FLTK_DATADIR}/fltk")
else(IS_ABSOLUTE "${FLTK_DATADIR}")
set(PREFIX_DATA "${CMAKE_INSTALL_PREFIX}/${FLTK_DATADIR}/fltk")
endif(IS_ABSOLUTE "${FLTK_DATADIR}")
if(IS_ABSOLUTE "${FLTK_DOCDIR}")
set(PREFIX_DOC "${FLTK_DOCDIR}/fltk")
else(IS_ABSOLUTE "${FLTK_DOCDIR}")
set(PREFIX_DOC "${CMAKE_INSTALL_PREFIX}/${FLTK_DOCDIR}/fltk")
endif(IS_ABSOLUTE "${FLTK_DOCDIR}")
set(CONFIG_H_IN config.h.in)
set(CONFIG_H config.h)
# generate the header file
configure_file(
"${CMAKE_CURRENT_SOURCE_DIR}/${CONFIG_H_IN}"
"${CMAKE_CURRENT_BINARY_DIR}/${CONFIG_H}"
@ONLY
)
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