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glibc for ARM with VFP hard float


Hi All,

First I would like to say big thanks to Yann for the great tool he made! It
really saves a lot of time!

Now my questions:
I managed to create a toolchain for ARM with hard floating point support.
But when I disassembled the libm.so.6 I saw that it uses <__aeabi_ddiv>
<__aeabi_dmul> etc calls instead of native floating point instructions. The
code for these <__aeabi_...> is in libc.so.6 and it does not use hard
floating point instructions, but it rather looks like a software emulation.

Am I missing something from the configuration, which is listed below?

Isn't CT_ARCH_FLOAT_HW=y and CT_ARCH_FPU="vfp" enough to create libm.so and
libc.so, which would use native floating point insructions?

Thanks in advance.

Adel

My .config is as follows:

#
# Automatically generated make config: don't edit
# crosstool-NG version: 1.5.2
# Tue Jan  5 15:31:46 2010
#

#
# Paths and misc options
#

#
# crosstool-NG behavior
#
# CT_OBSOLETE is not set
# CT_EXPERIMENTAL is not set
# CT_DEBUG_CT is not set

#
# Paths
#
CT_LOCAL_TARBALLS_DIR="${HOME}/src"
CT_SAVE_TARBALLS=y
CT_WORK_DIR="${CT_TOP_DIR}/targets"
CT_PREFIX_DIR="${HOME}/x-tools/${CT_TARGET}"
CT_INSTALL_DIR="${CT_PREFIX_DIR}"
CT_REMOVE_DOCS=y
CT_INSTALL_DIR_RO=y

#
# Downloading
#
# CT_FORBID_DOWNLOAD is not set
# CT_FORCE_DOWNLOAD is not set
# CT_USE_MIRROR is not set
CT_CONNECT_TIMEOUT=100
# CT_ONLY_DOWNLOAD is not set

#
# Extracting
#
# CT_FORCE_EXTRACT is not set
CT_OVERIDE_CONFIG_GUESS_SUB=y
# CT_ONLY_EXTRACT is not set
CT_PATCH_BUNDLED=y
# CT_PATCH_LOCAL is not set
# CT_PATCH_BUNDLED_LOCAL is not set
# CT_PATCH_LOCAL_BUNDLED is not set
# CT_PATCH_BUNDLED_FALLBACK_LOCAL is not set
# CT_PATCH_LOCAL_FALLBACK_BUNDLED is not set
CT_PATCH_ORDER="bundled"
# CT_PATCH_SINGLE is not set
# CT_PATCH_USE_LOCAL is not set

#
# Build behavior
#
CT_PARALLEL_JOBS=1
CT_LOAD=0
CT_NICE=0
CT_USE_PIPES=y
# CT_CONFIG_SHELL_SH is not set
# CT_CONFIG_SHELL_ASH is not set
CT_CONFIG_SHELL_BASH=y
# CT_CONFIG_SHELL_CUSTOM is not set
CT_CONFIG_SHELL="bash"

#
# Logging
#
# CT_LOG_ERROR is not set
# CT_LOG_WARN is not set
# CT_LOG_INFO is not set
# CT_LOG_EXTRA is not set
# CT_LOG_DEBUG is not set
CT_LOG_ALL=y
CT_LOG_LEVEL_MAX="ALL"
# CT_LOG_SEE_TOOLS_WARN is not set
CT_LOG_TO_FILE=y
CT_LOG_FILE_COMPRESS=y

#
# Target options
#
CT_ARCH="arm"
# CT_ARCH_64 is not set
# CT_ARCH_SUPPORTS_BOTH_MMU is not set
CT_ARCH_SUPPORTS_BOTH_ENDIAN=y
CT_ARCH_SUPPORT_ARCH=y
# CT_ARCH_SUPPORT_ABI is not set
CT_ARCH_SUPPORT_CPU=y
CT_ARCH_SUPPORT_TUNE=y
CT_ARCH_SUPPORT_FPU=y
# CT_ARCH_DEFAULT_HAS_MMU is not set
# CT_ARCH_DEFAULT_BE is not set
CT_ARCH_DEFAULT_LE=y
CT_ARCH_ARCH=""
CT_ARCH_CPU="arm1176jzf-s"
CT_ARCH_TUNE=""
CT_ARCH_FPU="vfp"
# CT_ARCH_BE is not set
CT_ARCH_LE=y
CT_ARCH_FLOAT_HW=y
# CT_ARCH_FLOAT_SW is not set
CT_TARGET_CFLAGS=""
CT_TARGET_LDFLAGS=""

#
# General target options
#
# CT_ARCH_alpha is not set
CT_ARCH_arm=y
# CT_ARCH_avr32 is not set
# CT_ARCH_ia64 is not set
# CT_ARCH_mips is not set
# CT_ARCH_powerpc64 is not set
# CT_ARCH_powerpc is not set
# CT_ARCH_sh is not set
# CT_ARCH_x86_64 is not set
# CT_ARCH_x86 is not set
CT_ARCH_ARM_EABI=y
CT_ARCH_USE_MMU=y

#
# Target optimisations
#

#
# Toolchain options
#

#
# General toolchain options
#
CT_USE_SYSROOT=y
CT_SYSROOT_DIR_PREFIX=""

#
# Tuple completion and aliasing
#
CT_TARGET_VENDOR="unknown"
CT_TARGET_ALIAS_SED_EXPR=""
CT_TARGET_ALIAS=""

#
# Toolchain type
#
# CT_NATIVE is not set
CT_CROSS=y
# CT_CROSS_NATIVE is not set
# CT_CANADIAN is not set
CT_TOOLCHAIN_TYPE="cross"

#
# Build system
#
CT_BUILD=""
CT_BUILD_PREFIX=""
CT_BUILD_SUFFIX=""

#
# Operating System
#
# CT_BARE_METAL is not set
CT_KERNEL_SUPPORTS_SHARED_LIBS=y
CT_KERNEL="linux"
CT_KERNEL_VERSION="2.6.28.10"
# CT_KERNEL_bare_metal is not set
CT_KERNEL_linux=y
CT_KERNEL_LINUX_INSTALL=y
CT_KERNEL_LINUX_INSTALL_CHECK=y
# CT_KERNEL_V_2_6_31_1 is not set
# CT_KERNEL_V_2_6_31 is not set
# CT_KERNEL_V_3_6_30_8 is not set
# CT_KERNEL_V_3_6_30_7 is not set
# CT_KERNEL_V_2_6_30_6 is not set
# CT_KERNEL_V_2_6_30_5 is not set
# CT_KERNEL_V_2_6_30_4 is not set
# CT_KERNEL_V_2_6_30_3 is not set
# CT_KERNEL_V_2_6_30_2 is not set
# CT_KERNEL_V_2_6_30_1 is not set
# CT_KERNEL_V_2_6_30 is not set
# CT_KERNEL_V_2_6_29_6 is not set
CT_KERNEL_V_2_6_28_10=y
# CT_KERNEL_V_2_6_27_35 is not set
# CT_KERNEL_V_2_6_26_8 is not set
# CT_KERNEL_V_2_6_25_20 is not set
# CT_KERNEL_V_2_6_24_7 is not set
# CT_KERNEL_V_2_6_23_17 is not set
# CT_KERNEL_V_2_6_22_19 is not set
# CT_KERNEL_V_2_6_21_7 is not set
# CT_KERNEL_V_2_6_20_21 is not set
# CT_KERNEL_V_2_6_19_7 is not set
# CT_KERNEL_V_2_6_18_8 is not set
# CT_KERNEL_V_select is not set
CT_KERNEL_LINUX_VERBOSITY_0=y
# CT_KERNEL_LINUX_VERBOSITY_1 is not set
# CT_KERNEL_LINUX_VERBOSITY_2 is not set
CT_KERNEL_LINUX_VERBOSE_LEVEL=0
# CT_KERNEL_LINUX_USE_CUSTOM_HEADERS is not set

#
# Common kernel options
#
CT_SHARED_LIBS=y

#
# Binary utilities
#
CT_ARCH_BINFMT_ELF=y
# CT_ARCH_BINFMT_FLAT is not set

#
# GNU binutils
#
CT_BINUTILS_VERSION="2.19.1"
# CT_BINUTILS_V_2_19_51_0_2 is not set
# CT_BINUTILS_V_2_19_51_0_1 is not set
# CT_BINUTILS_V_2_19_50_0_1 is not set
CT_BINUTILS_V_2_19_1=y
# CT_BINUTILS_V_2_19 is not set
# CT_BINUTILS_V_2_18_93 is not set
# CT_BINUTILS_V_2_18_92 is not set
# CT_BINUTILS_V_2_18_91 is not set
# CT_BINUTILS_V_2_18_90 is not set
# CT_BINUTILS_V_2_18_50_0_9 is not set
# CT_BINUTILS_V_2_18_50_0_8 is not set
# CT_BINUTILS_V_2_18_50_0_7 is not set
# CT_BINUTILS_V_2_18_50_0_6 is not set
# CT_BINUTILS_V_2_18_50_0_4 is not set
# CT_BINUTILS_V_2_18 is not set
# CT_BINUTILS_V_2_17 is not set
# CT_BINUTILS_V_2_16_1 is not set
# CT_BINUTILS_V_2_15 is not set
# CT_BINUTILS_V_2_14 is not set
CT_BINUTILS_EXTRA_CONFIG=""
CT_BINUTILS_FOR_TARGET=y
CT_BINUTILS_FOR_TARGET_IBERTY=y
CT_BINUTILS_FOR_TARGET_BFD=y

#
# C compiler
#
CT_CC="gcc"
CT_CC_VERSION="4.3.2"
CT_CC_gcc=y
# CT_CC_V_4_4_1 is not set
# CT_CC_V_4_4_0 is not set
# CT_CC_V_4_3_4 is not set
# CT_CC_V_4_3_3 is not set
CT_CC_V_4_3_2=y
# CT_CC_V_4_3_1 is not set
# CT_CC_V_4_3_0 is not set
# CT_CC_V_4_2_4 is not set
# CT_CC_V_4_2_3 is not set
# CT_CC_V_4_2_2 is not set
# CT_CC_V_4_2_1 is not set
# CT_CC_V_4_2_0 is not set
# CT_CC_V_4_1_2 is not set
# CT_CC_V_4_1_1 is not set
# CT_CC_V_4_1_0 is not set
# CT_CC_V_4_0_4 is not set
# CT_CC_V_4_0_3 is not set
# CT_CC_V_4_0_2 is not set
# CT_CC_V_4_0_1 is not set
# CT_CC_V_4_0_0 is not set
# CT_CC_V_3_4_6 is not set
# CT_CC_V_3_3_6 is not set
# CT_CC_V_3_2_3 is not set
CT_CC_GCC_4_3_or_later=y
# CT_CC_GCC_4_4_or_later is not set
CT_CC_CXA_ATEXIT=y
CT_CC_SJLJ_EXCEPTIONS_CONFIGURE=y
# CT_CC_SJLJ_EXCEPTIONS_USE is not set
# CT_CC_SJLJ_EXCEPTIONS_DONT_USE is not set
CT_CC_ENABLE_CXX_FLAGS=""
CT_CC_CORE_EXTRA_CONFIG=""
CT_CC_EXTRA_CONFIG=""
CT_CC_PKGVERSION="crosstool-NG-${CT_VERSION}"
CT_CC_BUGURL=""
CT_CC_SUPPORT_CXX=y
CT_CC_SUPPORT_FORTRAN=y
CT_CC_SUPPORT_JAVA=y
CT_CC_SUPPORT_ADA=y
CT_CC_SUPPORT_OBJC=y
CT_CC_SUPPORT_OBJCXX=y

#
# Additional supported languages:
#
CT_CC_LANG_CXX=y
# CT_CC_LANG_FORTRAN is not set
# CT_CC_LANG_JAVA is not set
CT_LIBC="glibc"

#
# C-library
#
CT_LIBC_VERSION="2.6.1"
# CT_LIBC_eglibc is not set
CT_LIBC_glibc=y
# CT_LIBC_newlib is not set
# CT_LIBC_uClibc is not set
# CT_LIBC_V_2_9 is not set
# CT_LIBC_V_2_8 is not set
# CT_LIBC_V_2_7 is not set
CT_LIBC_V_2_6_1=y
# CT_LIBC_V_2_6 is not set
# CT_LIBC_V_2_5_1 is not set
# CT_LIBC_V_2_5 is not set
# CT_LIBC_V_2_3_6 is not set
# CT_LIBC_GLIBC_2_8_or_later is not set
CT_LIBC_GLIBC_TARBALL=y
# CT_LIBC_GLIBC_CVS is not set

#
# glibc/eglibc common options
#
CT_LIBC_GLIBC_EXTRA_CONFIG=""
CT_LIBC_GLIBC_CONFIGPARMS=""
CT_LIBC_GLIBC_EXTRA_CFLAGS=""
CT_LIBC_EXTRA_CC_ARGS=""
CT_LIBC_GLIBC_USE_PORTS=y
CT_LIBC_ADDONS_LIST=""
# CT_LIBC_GLIBC_KERNEL_VERSION_NONE is not set
CT_LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS=y
# CT_LIBC_GLIBC_KERNEL_VERSION_CHOSEN is not set
CT_LIBC_GLIBC_MIN_KERNEL="2.6.28.10"

#
# Common C library options
#
CT_LIBC_SUPPORT_NPTL=y
CT_LIBC_SUPPORT_LINUXTHREADS=y
CT_THREADS="nptl"
CT_THREADS_NPTL=y
# CT_THREADS_LINUXTHREADS is not set
# CT_THREADS_NONE is not set

#
# Debug facilities
#
# CT_DEBUG_dmalloc is not set
# CT_DEBUG_duma is not set
CT_DEBUG_gdb=y
CT_GDB_CROSS=y
# CT_GDB_CROSS_STATIC is not set
# CT_GDB_NATIVE is not set
CT_GDB_GDBSERVER=y
CT_GDB_GDBSERVER_STATIC=y
CT_GDB_V_6_8=y
# CT_GDB_V_6_7_1 is not set
# CT_GDB_V_6_7 is not set
# CT_GDB_V_6_6 is not set
# CT_GDB_V_6_5 is not set
# CT_GDB_V_6_4 is not set
# CT_GDB_V_snapshot is not set
CT_GDB_VERSION="6.8"
# CT_DEBUG_ltrace is not set
# CT_DEBUG_strace is not set

#
# Tools facilities
#
# CT_TOOL_libelf is not set
# CT_TOOL_sstrip is not set

#
# Companion libraries
#
CT_WRAPPER_NEEDED=y
CT_GMP_MPFR=y
CT_GMP_V_4_3_1=y
# CT_GMP_V_4_3_0 is not set
# CT_GMP_V_4_2_4 is not set
# CT_GMP_V_4_2_2 is not set
CT_GMP_VERSION="4.3.1"
CT_MPFR_V_2_4_1=y
# CT_MPFR_V_2_4_0 is not set
# CT_MPFR_V_2_3_2 is not set
# CT_MPFR_V_2_3_1 is not set
CT_MPFR_VERSION="2.4.1"
# CT_PPL_CLOOG_MPC is not set

#
# Companion libraries common options
#
# CT_COMP_LIBS_CHECK is not set
# CT_COMP_LIBS_TARGET is not set
CT_TOOLS_WRAPPER_SCRIPT=y
# CT_TOOLS_WRAPPER_EXEC is not set
CT_TOOLS_WRAPPER="script" 
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