build.ninja

cxxflags = -g -Wall -std=c++14 -I. 
cflags = -g -Wall -std=c99 -I. 
lflags =  -lm -lstdc++ -lc
libs = 
rule cxx
  command = g++ $cxxflags -c $in -o $out
rule cc
  command = gcc $cflags -c $in -o $out
rule cl
  command = gcc -o $out $in $libs $lflags
rule ocb
  command = objcopy -O binary $in $out
rule cdb
  command = ninja -t compdb cc cxx > cc_preexp.json
rule cdb_e
  command = cat cc_preexp.json | ./expand_compdb.py > compile_commands.json
rule cscf
  command = find . -regex ".*\(\.c\|\.h\|.cpp\|.hpp\)$$" -and -not -type d $
      > $out
rule cscdb
  command = cscope -bq
build cc_preexp.json: cdb
build compile_commands.json: cdb_e cc_preexp.json
build cscope.files: cscf
build cscope.in.out cscope.po.out cscope.out: cscdb cscope.files
build ./etree.o: cxx ./etree.cpp
build ./main.o: cxx ./main.cpp
build main.elf: cl ./etree.o ./main.o
build main.bin: ocb main.elf