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Hi, I got a toolchain with gcc-4.1.0/glibc-2.4/binutils-2.16.91.0.7 by using crossgcc. It has a litte difference with the old version. Here are some questions. 1. How to support multiple abi? It can compile application with -mabi=aapcs. This can be observed with "arm-iwmmxt-linux-gnueabi-objdum -p a.out | grep private", the result is private flags = 4000002: [Version4 EABI] [has entry point] I suppose the toolchain should support old abi and the default is eabi. The test case shows the result with and without -mabi=aapcs is the same. But I cannot get an old abi object file. I cannot use -mabi=apcs option. I can use -mapcs, but the result is the same as -mabi=aapcs. How should I support multiple abi to the gcc-4.1.0/glibc-2.4 toolchain. 2. Which floating point is used? I ever used objdump to see private flags in binary file show the floating point format. But from item 1 we cannot know it. I checked the binutils source file, seems FPA used, but I'm not sure. 3. How to modify gcc specs? I remembered there is a specs file which can control some behaviours of gcc. But following output shows the new toolchain uses built-in specs. Can I still modify gcc specs? $ arm-iwmmxt-linux-gnueabi-gcc -v Using built-in specs. Target: arm-iwmmxt-linux-gnueabi Configured with: /home/test/gcc41-glibc24-binu216/build/arm-iwmmxt-linux-gnueabi/gcc-4.1.0-glibc-2.4/gcc-4.1.0/configure --target=arm-iwmmxt-linux-gnueabi --host=i686-host_pc-linux-gnu --prefix=/usr/local/bridge/arm-iwmmxt-linux-gnueabi --with-cpu=iwmmxt --with-float=soft --enable-cxx-flags=-msoft-float --with-headers=/usr/local/bridge/arm-iwmmxt-linux-gnueabi/arm-iwmmxt-linux-gnueabi/include --with-local-prefix=/usr/local/bridge/arm-iwmmxt-linux-gnueabi/arm-iwmmxt-linux-gnueabi --disable-nls --enable-threads=posix --enable-symvers=gnu --enable-__cxa_atexit --enable-languages=c,c++ --enable-shared --enable-c99 --enable-long-long Thread model: posix gcc version 4.1.0 -- best regards, -Bridge -- For unsubscribe information see http://sourceware.org/lists.html#faq
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