So isn't GCC POSIX compliant? I mean a static build of gcc executable and nothing more (no make, awk or anything) The only thing that GCC does is read and write files The C library shouldn't be part of the equation since GCC can compile many C libraries Another compiler (besides clang) won't work since I expect C++
So what's the actual difficulty in running a program that just reads and writes files? On Sat, Apr 8, 2023 at 2:47 PM Gregory Nutt <spudan...@gmail.com> wrote: > On 4/7/2023 9:02 PM, Victor Suarez Rovere wrote: > > Hi everyone! > > Considering that NuttX is POSIX compliant, can gcc or clang be run on > NuttX? > > I was waiting to see if someone who has actually tried this would > respond. I haven't tried to build a GCC toolchain on NuttX and can't > say that it is impossible, but it certainly would be a big challenge! > > * *GCC Components*. GCC consists of several components including > binutils and several other prerequisite libraries (GMP, MPFR, MPC). > A Bash shell and GNU make would need needed too. > > * *Other dependencies*: awk, GNU make, Perl, Python3, Flex, Bison, > and perhaps automake. Maybe gzip, bzip2, and tar if you build from > tarballs. Documentation needs Texinfo. And lots of other things > that I forgot. > > * *GDB*. GDB is usually considered to be part of the toolchain too. > But it would not be possible to build GDB because it depends on > ptrace which not supported by NuttX. > > * *C Library*. GCC and C-libraries are very intimately entangled. > NuttX has its own C libary. I suspect that the integration with GCC > and the NuttX C library would be somewhat challenging as well. > > * *Other Unsupported Interfaces*. Several interfaces that depend on > an MMU (fork, full mmap) are not supported and could also be an issue. > > * FLAT build? Or Kernel build? Each has it own challenges. > > * *Delivery*. GCC normally comes as several Linux executables and > libraries that use several other shared libraries. How would you > package and deliver a GCC toolchain on NuttX? Would you build it > into the FLASH image or put it into a huge monolithic ELF executable > on some mounted volume? > > Although I cannot say it is impossible, I would not be optimistic > starting a GCC port to NuttX. I would think that a smaller, less > feature rich C compiler would be a reasonable job. >
