abacus: add cmake-based build system

src/CMakeLists.txt

@@ -0,0 +1,12 @@
+add_executable(abacus abacus.cc)
+target_link_libraries(abacus PRIVATE common_options)
+
+add_subdirectory(bignum)
+add_subdirectory(parse)
+
+target_link_libraries(abacus PRIVATE
+  bignum
+  parse
+)
+
+install(TARGETS abacus)

src/bignum/CMakeLists.txt

@@ -0,0 +1,9 @@
+add_library(bignum STATIC
+  bignum.cc
+  bignum.hh
+)
+target_link_libraries(bignum PRIVATE common_options)
+
+target_include_directories(bignum PUBLIC
+  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+)

src/parse/CMakeLists.txt

@@ -0,0 +1,23 @@
+find_package(BISON REQUIRED)
+find_package(FLEX REQUIRED)
+
+bison_target(parser_sources parser.yy ${CMAKE_CURRENT_BINARY_DIR}/parser.cc DEFINES_FILE ${CMAKE_CURRENT_BINARY_DIR}/parser.hh)
+flex_target(scanner_sources scanner.ll  ${CMAKE_CURRENT_BINARY_DIR}/scanner.cc)
+add_flex_bison_dependency(scanner_sources parser_sources)
+
+add_library(parse STATIC
+  parser-driver.cc
+  parser-driver.hh
+  ${BISON_parser_sources_OUTPUTS}
+  ${FLEX_scanner_sources_OUTPUTS}
+)
+target_link_libraries(parse PRIVATE common_options)
+
+target_link_libraries(parse PRIVATE
+  bignum
+)
+
+target_include_directories(parse PUBLIC
+  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+  $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>
+)