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The gcc man page states that specifying Neon as part of the fpu setting
has no effect, unless the -funsafe-math-optimizations is also specified,
because Neon is not compliant with IEEE 754:
```
If the selected floating-point hardware includes the NEON extension
(e.g. -mfpu=neon), note that floating-point operations are not
generated by GCC's auto-vectorization pass unless
-funsafe-math-optimizations is also specified. This is because NEON
hardware does not fully implement the IEEE 754 standard for
floating-point arithmetic (in particular denormal values are treated
as zero), so the use of NEON instructions may lead to a loss of
precision.
```
-funsafe-math-optimizations must be explictly specified per package to
really use NEON as FPU, but it's something that is left to the user as
well as setting BR2_ARM_FPU_NEON_VFPV4. This way the default
BR2_ARM_FPU_VFPV4D16 is used as previously. So let's revert the
offending patch.
This reverts commit 23329364e2.
Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
53 lines
1.6 KiB
Plaintext
53 lines
1.6 KiB
Plaintext
# Architecture
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BR2_arm=y
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BR2_cortex_a7=y
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# Linux headers same as kernel, a 5.14 series
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BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_14=y
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# System configuration
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BR2_TARGET_GENERIC_HOSTNAME="A33-olinuxino"
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BR2_TARGET_GENERIC_ISSUE="Welcome to A33 OLinuXino!"
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BR2_TARGET_GENERIC_GETTY=y
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BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"
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# Bootloaders
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BR2_TARGET_UBOOT=y
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BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
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BR2_TARGET_UBOOT_CUSTOM_VERSION=y
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BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2021.10"
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BR2_TARGET_UBOOT_BOARD_DEFCONFIG="A33-OLinuXino"
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BR2_TARGET_UBOOT_NEEDS_DTC=y
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BR2_TARGET_UBOOT_NEEDS_PYTHON3=y
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BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y
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BR2_TARGET_UBOOT_NEEDS_OPENSSL=y
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BR2_TARGET_UBOOT_FORMAT_BIN=y
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BR2_TARGET_UBOOT_SPL=y
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BR2_TARGET_UBOOT_SPL_NAME="u-boot-sunxi-with-spl.bin"
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BR2_PACKAGE_HOST_UBOOT_TOOLS=y
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BR2_PACKAGE_HOST_UBOOT_TOOLS_BOOT_SCRIPT=y
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BR2_PACKAGE_HOST_UBOOT_TOOLS_BOOT_SCRIPT_SOURCE="board/olimex/a33_olinuxino/boot.cmd"
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# Kernel
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BR2_LINUX_KERNEL=y
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BR2_LINUX_KERNEL_CUSTOM_VERSION=y
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BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.14.13"
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BR2_LINUX_KERNEL_USE_DEFCONFIG=y
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BR2_LINUX_KERNEL_DEFCONFIG="sunxi"
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BR2_LINUX_KERNEL_DTS_SUPPORT=y
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BR2_LINUX_KERNEL_INTREE_DTS_NAME="sun8i-a33-olinuxino"
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BR2_LINUX_KERNEL_INSTALL_TARGET=y
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# Filesystem
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BR2_TARGET_ROOTFS_EXT2=y
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BR2_TARGET_ROOTFS_EXT2_4=y
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BR2_ROOTFS_POST_BUILD_SCRIPT="board/olimex/a33_olinuxino/post-build.sh"
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BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
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BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/olimex/a33_olinuxino/genimage.cfg"
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# Additional tools
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BR2_PACKAGE_HOST_DOSFSTOOLS=y
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BR2_PACKAGE_HOST_GENIMAGE=y
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BR2_PACKAGE_HOST_UBOOT_TOOLS=y
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BR2_PACKAGE_HOST_MTOOLS=y
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