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CMake: Support building without re2c

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This commit is contained in:
Jan Niklas Hasse 2019-05-10 17:03:20 +02:00
parent ec6e7c7a77
commit 691b821c90
1 changed files with 15 additions and 9 deletions
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24
CMakeLists.txt
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@ -7,15 +7,21 @@ else()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated -fdiagnostics-color")
endif()
# the depfile parser and ninja lexers are generated using re2c.
function(re2c IN OUT)
add_custom_command(DEPENDS ${IN} OUTPUT ${OUT}
COMMAND re2c -b -i --no-generation-date -o ${OUT} ${IN}
)
endfunction()
re2c(${CMAKE_SOURCE_DIR}/src/depfile_parser.in.cc ${CMAKE_BINARY_DIR}/depfile_parser.cc)
re2c(${CMAKE_SOURCE_DIR}/src/lexer.in.cc ${CMAKE_BINARY_DIR}/lexer.cc)
add_library(libninja-re2c OBJECT ${CMAKE_BINARY_DIR}/depfile_parser.cc ${CMAKE_BINARY_DIR}/lexer.cc)
find_program(RE2C re2c)
if(RE2C)
# the depfile parser and ninja lexers are generated using re2c.
function(re2c IN OUT)
add_custom_command(DEPENDS ${IN} OUTPUT ${OUT}
COMMAND ${RE2C} -b -i --no-generation-date -o ${OUT} ${IN}
)
endfunction()
re2c(${CMAKE_SOURCE_DIR}/src/depfile_parser.in.cc ${CMAKE_BINARY_DIR}/depfile_parser.cc)
re2c(${CMAKE_SOURCE_DIR}/src/lexer.in.cc ${CMAKE_BINARY_DIR}/lexer.cc)
add_library(libninja-re2c OBJECT ${CMAKE_BINARY_DIR}/depfile_parser.cc ${CMAKE_BINARY_DIR}/lexer.cc)
else()
message(WARNING "re2c was not found; changes to src/*.in.cc will not affect your build.")
add_library(libninja-re2c OBJECT src/depfile_parser.cc src/lexer.cc)
endif()
target_include_directories(libninja-re2c PRIVATE src)
# Core source files all build into ninja library.