libc and libstdc++
Guest
#1171653
Please in every make file script is -lc or -lstdc++ but i dont have it. I am using only arm-elf-gcc/g++ on linux. In my ARM7TDMI i don use any os only my compiled binary. Please tell me how i compile libc, libm a and libstdc++ (without any parts which need kernel (syscalls , iostreams .....)) THX
Guest
#1171654
Mirec Talasek wrote: > Please in every make file script is -lc or -lstdc++ but i dont have it. > I am using only arm-elf-gcc/g++ on linux. > In my ARM7TDMI i don use any os only my compiled binary. > > Please tell me how i compile libc, libm a and libstdc++ (without any > parts which need kernel (syscalls , iostreams .....)) There are several choices for an "embedded" libc/libm. The libc used in most precompiled free GNU arm-elf-toolchains is the newlib but there are others available too (i.e. dietlibc, uclibc). Beside the technical aspects check the licenses for the different libs. There should be several tutorials available in the net which explain how to build a cross-compiler with gcc and newlib. libstdc++ ist part of the gcc-distribution and should be build "automaticly" when enabling C++-support. (Maybe it does not build when there is no libc for the target so try to build a "cross"-libc first.) Martin Thomas Mirec Talasek wrote: > Please in every make file script is -lc or -lstdc++ but i dont have it. > I am using only arm-elf-gcc/g++ on linux. > In my ARM7TDMI i don use any os only my compiled binary. > > Please tell me how i compile libc, libm a and libstdc++ (without any > parts which need kernel (syscalls , iostreams .....)) > > THX The GNU C library assumes a Linux/Unix-like subsystem, and is not really suited to OS-less or non-Posix RTOS based embedded systems. The most common solution is to use the Newlib C library (which incidentally has fewer licence restrictions that GPL code). GNU libstdc++ will work hapilly with Newlib as its low-level runtime support. The libraries are normally build with the compiler, so it is surprising that you do not have them. Last time I built GCC for ARM I used the instructions here: http://ecos.sourceware.org/build-toolchain.html (don't worry about the "for eCOS" references, the critical thing is that it is not "for Linux". A similar pagem but which is specific to GCC 4.1.1 is at http://www.jstuber.net/lego/nxt-programming/arm-toolchain.html (oddly, these instructions have a separate build stage for Newlib, despite it being built with GCC - the eCOS instructions simply copy the library to the required location. It is possible to build Newlib separately, but the GCC configure script seems to deal with creating all the necessary architecture variations for Thumb, FPE, etc. Which I have never been able to get the Newlib script to do (perhaps because I know very little about all that configure script stuff!). With Newlib, it is your responsibility to provide the necessary low-level glue by implementing some or all of the syscall routines. The examples provided assume the existance of one of the supported ROM monitor interfaces, which may not be suitable in your case. Clifford
Guest
#1171656
Martin Thomas wrote: > Mirec Talasek wrote: >> Please in every make file script is -lc or -lstdc++ but i dont have it. >> I am using only arm-elf-gcc/g++ on linux. >> In my ARM7TDMI i don use any os only my compiled binary. >> than you very much Reply |