On 5 August 2014 15:17, Daniel Neis <danieln...@gmail.com> wrote: > Hello, > > i am trying to develop a GCC frontend using flex and bison as lexer/parser. > > i've read several documentation (the list below and also the gccint.info) > > * https://github.com/rabishah/Mini-C-Compiler-using-Flex-And-Yacc/ > * http://www.tldp.org/HOWTO/GCC-Frontend-HOWTO.html > * https://gcc.gnu.org/wiki/WritingANewFrontEnd > * https://gcc.gnu.org/ml/gcc-patches/2006-06/msg00648.html > * https://gcc.gnu.org/wiki/FrontEnd/skeleton > * http://blog.lxgcc.net/wp-content/uploads/2011/03/GCC_frontend.pdf > * http://cobolforgcc.sourceforge.net/cobol_14.html#SEC96 > * https://gcc.gnu.org/onlinedocs/gccint/Parsing-pass.html#Parsing-pass > > but still having some problems to make it work. > > the code is on github: > > https://github.com/danielneis/gcc-neis-frontend > > the project compiles and generates my compiler "neis1". it is a valid > elf and i can run it with --help and it shows me the help. > > I am testing it with a simple .c file like this: > > int main() { > return 0; > } > > ~/bin$ ./gcc -x neis /home/neis/test.c > /usr/lib/x86_64-linux-gnu/crt1.o: In function `_start': > /home/aurel32/glibc/glibc-2.19/csu/../sysdeps/x86_64/start.S:118: > undefined reference to `main' > collect2: error: ld returned 1 exit status > > > I think I may be missing some part of code generation with generic, > but could not find any references... > > Any thoughts? >
I couldn't see any reference to cgraph_finalize_function nor finalize_compilation_unit. So it looks like you are not sending any code to the backend to be compiled. This is a nice point of reference for a skeleton front-end. https://github.com/giuseppe/gccbrainfuck Regards Iain
