From mboxrd@z Thu Jan 1 00:00:00 1970 From: aduskett at gmail.com Date: Sun, 23 Jun 2019 17:23:41 -0400 Subject: [Buildroot] [PATCH v12 5/6] package/qemu: drop host kernel version check In-Reply-To: <20190623212342.41809-1-aduskett@gmail.com> References: <20190623212342.41809-1-aduskett@gmail.com> Message-ID: <20190623212342.41809-6-aduskett@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net From: Adam Duskett There is no clean way to check if a program will actually run using host-qemu, making this check too restrictive. Signed-off-by: Adam Duskett --- Changes v11 - v12: - Re-add this patch to the series as it was missing in V11. Changes v1 -> v10: - Add this patch to the series. package/qemu/qemu.mk | 22 ---------------------- 1 file changed, 22 deletions(-) diff --git a/package/qemu/qemu.mk b/package/qemu/qemu.mk index 73e0778d73..c57126b486 100644 --- a/package/qemu/qemu.mk +++ b/package/qemu/qemu.mk @@ -240,28 +240,6 @@ ifneq ($(HOST_QEMU_HOST_SYSTEM_TYPE),Linux) $(error "qemu-user can only be used on Linux hosts") endif -# kernel version as major*256 + minor -HOST_QEMU_HOST_SYSTEM_VERSION = $(shell uname -r | awk -F. '{ print $$1 * 256 + $$2 }') -HOST_QEMU_TARGET_SYSTEM_VERSION = $(shell echo $(BR2_TOOLCHAIN_HEADERS_AT_LEAST) | awk -F. '{ print $$1 * 256 + $$2 }') -HOST_QEMU_COMPARE_VERSION = $(shell test $(HOST_QEMU_HOST_SYSTEM_VERSION) -ge $(HOST_QEMU_TARGET_SYSTEM_VERSION) && echo OK) - -# -# The principle of qemu-user is that it emulates the instructions of -# the target architecture when running the binary, and then when this -# binary does a system call, it converts this system call into a -# system call on the host machine. This mechanism makes an assumption: -# that the target binary will not do system calls that do not exist on -# the host. This basically requires that the target binary should be -# built with kernel headers that are older or the same as the kernel -# version running on the host machine. -# - -ifeq ($(BR_BUILDING),y) -ifneq ($(HOST_QEMU_COMPARE_VERSION),OK) -$(error "Refusing to build qemu-user: target Linux version newer than host's.") -endif -endif # BR_BUILDING - else # BR2_PACKAGE_HOST_QEMU_LINUX_USER_MODE HOST_QEMU_OPTS += --disable-linux-user endif # BR2_PACKAGE_HOST_QEMU_LINUX_USER_MODE -- 2.21.0