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Fail CMake build if make-generated files are found #1482

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Merged
merged 1 commit into from
Oct 17, 2017
Merged

Fail CMake build if make-generated files are found #1482

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19 changes: 17 additions & 2 deletions src/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -30,13 +30,23 @@ endif(DOXYGEN_FOUND)

# Add a bison target named 'parser'.
macro(generic_bison name)
set(bison_header "${name}_y.tab.h")
if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${bison_header}")
message(FATAL_ERROR "Generated file ${bison_header} found in source tree. If you previously built with `make`, run `make clean` and try again")
endif()

set(bison_source "${name}_y.tab.cpp")
if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${bison_source}")
message(FATAL_ERROR "Generated file ${bison_source} found in source tree. If you previously built with `make`, run `make clean` and try again")
endif()

bison_target(
parser
"${CMAKE_CURRENT_SOURCE_DIR}/parser.y"
"${CMAKE_CURRENT_BINARY_DIR}/${name}_y.tab.cpp"
"${CMAKE_CURRENT_BINARY_DIR}/${bison_source}"
COMPILE_FLAGS "-pyy${name}"
)
set(renamed_parser_header "${CMAKE_CURRENT_BINARY_DIR}/${name}_y.tab.h")
set(renamed_parser_header "${CMAKE_CURRENT_BINARY_DIR}/${bison_header}")
add_custom_command(OUTPUT "${renamed_parser_header}"
COMMAND "${CMAKE_COMMAND}" -E copy "${BISON_parser_OUTPUT_HEADER}" "${renamed_parser_header}"
MAIN_DEPENDENCY "${BISON_parser_OUTPUT_HEADER}"
Expand All @@ -47,6 +57,11 @@ endmacro(generic_bison)

# Add a flex target named 'scanner'
macro(generic_flex name)
set(flex_source "${name}_lex.yy.cpp")
if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${flex_source}")
message(FATAL_ERROR "Generated file ${flex_source} found in source tree. If you previously built with `make`, run `make clean` and try again")
endif()

flex_target(
scanner
"${CMAKE_CURRENT_SOURCE_DIR}/scanner.l"
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