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# SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
# SPDX-FileCopyrightText: Bradley M. Bell <bradbell@seanet.com>
# SPDX-FileContributor: 2003-25 Bradley M. Bell
# ----------------------------------------------------------------------------
# compile_source_test(defined_ok source variable)
#
# defined_ok (in)
# If this is true, it is OK for variable to be defined on input
# (it will be replaced). Otherwise it is a fatal error if variable
# is defined on input.
#
# source: (in)
# contains the source for the program that will be compiled and linked.
#
# variable: (out)
# Upon return, the value of this variable is 1 (0) if the program compiles
# and links (does not compile and link).
#
# CMAKE_REQUIRED_name (in)
# For name equal to DEFINITIONS, INCLUDES, LIBRARIES, FLAGS, the variable
# CMAKE_REQUIRED_name is an input to routine; see CHECK_CXX_SOURCE_COMPILES
# documentation.
#
MACRO(compile_source_test defined_ok source variable)
#
#
# check that variable is not yet defined
IF( NOT ${defined_ok} )
IF( DEFINED ${variable} )
MESSAGE(FATAL_ERROR
"compile_source_test: ${variable} is defined before expected"
)
ENDIF( DEFINED ${variable} )
ENDIF( NOT ${defined_ok} )
#
SET(CMAKE_REQUIRED_DEFINITIONS "" )
SET(CMAKE_REQUIRED_INCLUDES "" )
SET(CMAKE_REQUIRED_LIBRARIES "" )
IF( cppad_cxx_flags )
SET(CMAKE_REQUIRED_FLAGS "${cppad_cxx_flags} ${CMAKE_CXX_FLAGS}" )
ELSE( cppad_cxx_flags )
SET(CMAKE_REQUIRED_FLAGS "" )
ENDIF( cppad_cxx_flags )
#
# check that source code compiles
CHECK_CXX_SOURCE_COMPILES("${source}" ${variable} )
#
# change result varialbe to 0 (1) for fail (succeed).
IF( ${variable} )
SET(${variable} 1)
ELSE( ${variable} )
SET(${variable} 0)
ENDIF( ${variable} )
#
# check that varialbe is defined
IF( NOT DEFINED ${variable} )
MESSAGE(FATAL_ERROR
"compile_source_test: error in CMake script."
)
ENDIF( NOT DEFINED ${variable} )
#
MESSAGE(STATUS "${variable} = ${${variable}}" )
ENDMACRO( compile_source_test )
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