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On Nov 15, 2012, at 9:33 PM, liangh at codeaurora.org wrote: > I'm trying to link my objs with compiler-rt built runtime lib for arm. > According to the compiler-rt doc, it should be able to replace libgcc. > However, if I replace "-lgcc" with "compiler-rt.a" for a static linking, > gcc linker comp...

Hi, I'm trying to link my objs with compiler-rt built runtime lib for arm. According to the compiler-rt doc, it should be able to replace libgcc. However, if I replace "-lgcc" with "compiler-rt.a" for a static linking, gcc linker complains about undefined functions. Using "nm -g", I compared the functions in libgcc and compiler-rt.full-arm.a and found there are

Hi, I'm using compiler-rt to build the library to replace libgcc. How can I disable -lgcc being added and passed to the linker? When I use: "clang -ccc-gcc-name arm-cross-g++ hello.c -Lmypath -lmylib -v" -lgcc is always added: "...gcc/arm-none-linux-gnueabi/4.6.1/collect2 ... /tmp/hello-Pj9QxO.o -lgcc ..." How can I disable or override libgcc from the command line?

I'm using Clang, with arm-none-linux-gnueabi-g++ as a linker. Although compiler-rt replaced libgcc, we still need other libs such as libc, libm, etc. It seems libc is calling these missing functions. > > On Nov 15, 2012, at 9:33 PM, liangh at codeaurora.org wrote: >> I'm trying to link my objs with compiler-rt built runtime lib for arm. >> According to the compiler-rt doc, it should be able to replace libgcc. >> However, if I replace "-lgcc" with "compiler-rt.a" for a static linking, >>...

So, you mean I should compile libc with clang and link with compiler-rt too? But how can we expect a user of compiler-rt have a libc compiled in this way? It's a part of gcc's src code... If compiler-rt is a complete lib, it should also cover these functions, right? BTW, if libc is compiled statically, shouldn't itself already contain all functions it need? I just get confused now...

Hi guys, Thanks for all the info. Then, if, besides compiler-rt, I also need some other libs, such as libm, how do I link? Here is an example of missing functions in compiler-rt when linking: "-lstdc++ -lm --start-group -lcompiler-rt-armv7 -lgcc_eh -lc --end-group" vs. "-lstdc++ -lm --start-group -lgcc -lgcc_eh -lc --end-group" ...