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I am using gcc-3.3.3-glibc-2.3.2-linux-2.6.8 from crosstool-0.28-rc37 for ARM9.
export KERNELCONFIG=`pwd`/arm.config export TARGET=arm-softfloat-linux-gnu export TARGET_CFLAGS="-O" export GCC_EXTRA_CONFIG="--with-float=soft" export GLIBC_EXTRA_CONFIG="--without-fp" export BINUTILS_DIR=binutils-2.15 export GCC_DIR=gcc-3.3.3 export GLIBC_DIR=glibc-2.3.2 export LINUX_DIR=linux-2.6.8 export GLIBCTHREADS_FILENAME=glibc-linuxthreads-2.3.2
Do I have to pass -msoft-float when compiling applications with floating point operations? Or is this flag on by default?
I dunno. You might need to ask the arm-linux folks, who are better steeped in this than the crossgcc folks...
How do I know if floating point operations are realy handle by the softfloat functions and not by the kernel emulator?
Do an objdump of your code and see if it's using floating-point instructions? - Dan
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