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Have CMAKE parse conditional lines in KERNEL files 

Supports ifeq and ifneq, but requires both to have an else branch
This commit is contained in:
Martin Kroeker 2020-04-27 15:20:03 +02:00 committed by GitHub
parent 955d73127f
commit e7bbdfdf84
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1 changed files with 47 additions and 0 deletions
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47
cmake/utils.cmake
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@ -15,10 +15,33 @@ endfunction ()
# Reads a Makefile into CMake vars.
macro(ParseMakefileVars MAKEFILE_IN)
message(STATUS "Reading vars from ${MAKEFILE_IN}...")
set (IfElse 0)
set (ElseSeen 0)
file(STRINGS ${MAKEFILE_IN} makefile_contents)
foreach (makefile_line ${makefile_contents})
#message(STATUS "parsing ${makefile_line}")
if (${IfElse} GREATER 0)
string(REGEX MATCH "endif[ \t]*" line_match "${makefile_line}")
if (NOT "${line_match}" STREQUAL "")
# message(STATUS "ENDIF ${makefile_line}")
set (IfElse 0)
set (ElseSeen 0)
continue ()
endif ()
string(REGEX MATCH "else[ \t]*" line_match "${makefile_line}")
if (NOT "${line_match}" STREQUAL "")
# message(STATUS "ELSE ${makefile_line}")
set (ElseSeen 1)
continue ()
endif()
if ( (${IfElse} EQUAL 2 AND ${ElseSeen} EQUAL 0) OR ( ${IfElse} EQUAL 1 AND ${ElseSeen} EQUAL 1))
# message(STATUS "skipping ${makefile_line}")
continue ()
endif ()
endif ()
string(REGEX MATCH "([0-9_a-zA-Z]+)[ \t]*=[ \t]*(.+)$" line_match "${makefile_line}")
if (NOT "${line_match}" STREQUAL "")
#message(STATUS "match on ${line_match}")
set(var_name ${CMAKE_MATCH_1})
set(var_value ${CMAKE_MATCH_2})
# check for Makefile variables in the string, e.g. $(TSUFFIX)
@ -33,7 +56,31 @@ macro(ParseMakefileVars MAKEFILE_IN)
else ()
string(REGEX MATCH "include \\$\\(KERNELDIR\\)/(.+)$" line_match "${makefile_line}")
if (NOT "${line_match}" STREQUAL "")
#message(STATUS "match on include ${line_match}")
ParseMakefileVars(${KERNELDIR}/${CMAKE_MATCH_1})
else ()
# message(STATUS "unmatched line ${line_match}")
string(REGEX MATCH "ifeq \\(\\$\\(([_A-Z]+)\\),[ \t]*([0-9_A-Z]+)\\)" line_match "${makefile_line}")
if (NOT "${line_match}" STREQUAL "")
# message(STATUS "IFEQ: ${line_match} first: ${CMAKE_MATCH_1} second: ${CMAKE_MATCH_2}")
if (${${CMAKE_MATCH_1}} STREQUAL ${CMAKE_MATCH_2})
# message (STATUS "condition is true")
set (IfElse 1)
else ()
set (IfElse 2)
endif ()
else ()
string(REGEX MATCH "ifneq \\(\\$\\(([_A-Z]+)\\),[ \t]*([0-9_A-Z]+)\\)" line_match "${makefile_line}")
if (NOT "${line_match}" STREQUAL "")
# message(STATUS "IFNEQ: ${line_match} first: ${CMAKE_MATCH_1} second: ${CMAKE_MATCH_2}")
if (NOT ( ${${CMAKE_MATCH_1}} STREQUAL ${CMAKE_MATCH_2}))
message (STATUS "condition is true")
set (IfElse 1)
else ()
set (IfElse 2)
endif ()
endif ()
endif ()
endif ()
endif ()
endforeach ()