mtklinux_linux内核和 MTK 内核有什么区别

Ⅰ Yocto编译杰发或MTK的linux或android时的几个问题

编译问题1（audiomanager_7.0.bb的do_configure报错）：

错误：CMake Error at Plugins/PluginCommandInterfaceCAPI/cmake/CommonAPI.cmake:352 (message):

|   Failed to generate files from FIDL:

手动执行一下：

$ commonapi-generator-linux-x86 -ll verbose -sk Default -d . /data/linux/hz_rs28_bm/sources/神燃build/tmp/work/armv7a-vfp-neon-poky-linux-gnueabi/audiomanager/7.0-r1/audiomanager-7.0/Plugins/PluginCommandInterfaceCAPI/fidl/CommandInterface.fidl

-bash: /data/linux/hz_rs28_bm/sources/src/build/tools/commonapi_tool/commonapi-generator/commonapi-generator-linux-x86: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory

解决（需要安装32位的glibc库和32位java jre环境）：

$ sudo yum install glibc.i686

$ sudo yum install java-1.8.0-openjdk.i686

$ sudo ln -s /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.i386/jre/bin/java /bin/java

$ java -version    （保证是32位的java）

编译问题2（perl_5.20.0.bb的do_package报错）：

错误：ERROR: obj failed with exit code 256 (cmd was ‘arm-poky-linux-gnueabi-obj’ –only-keep-debug

… generate_uudmap: File format not recognized

解决（tar在1.29版本之后需要exclude在路径的前面）：

sources/meta/poky/bitbake/lib/bb/fetch2/bzr.py

tar_flags = “–exclude ‘.bzr’ –exclude ‘.bzrtags'”

修改成：

tar_flags = “–exclude=’.bzr’ –exclude=’.bzrtags'”

sources/meta/poky/bitbake/lib/bb/fetch2/cvs.py

tar_flags = “–exclude ‘CVS'”

修改成：

tar_flags = “–exclude=’CVS'”

sources/meta/poky/bitbake/游轮虚lib/bb/fetch2/repo.py

tar_flags = “–exclude ‘.repo’ –exclude ‘.git'”

修改成：

tar_flags = “–exclude=’.repo’ –exclude=’.git'”

sources/meta/poky/bitbake/lib/bb/fetch2/svn.py

tar_flags = “–exclude ‘桐颤.svn'”

修改成：

tar_flags = “–exclude=’.svn'”

sources/meta/poky/meta/recipes-devtools/quilt/quilt-0.63.inc

tar -cf – bin/ –exclude \*.in | ( cd ${D}${PTEST_PATH} && tar -xf – )

tar -cf – compat/ –exclude \*.in | ( cd ${D}${PTEST_PATH} && tar -xf – )

tar -cf – quilt/ –exclude \*.in | ( cd ${D}${PTEST_PATH} && tar -xf – )

tar -cf – test/ –exclude mail.test –exclude delete.test | ( cd ${D}${PTEST_PATH} && tar -xf – )

修改成：

        tar -c –exclude=\*.in bin/ | ( cd ${D}${PTEST_PATH} && tar -xf – )

        tar -c –exclude=\*.in compat/ | ( cd ${D}${PTEST_PATH} && tar -xf – )

        tar -c –exclude=\*.in quilt/ | ( cd ${D}${PTEST_PATH} && tar -xf – )

        tar -c –exclude=mail.test –exclude=delete.test test/ | ( cd ${D}${PTEST_PATH} && tar -xf – && chmod 777 test)

sources/meta/poky/meta/recipes-extended/sed/sed-4.2.2/sed-add-ptest.patch

+       cd $(BUILDDIR); tar -cf – $(TESTDIR) –exclude *.o | ( cd $(DESTDIR) && tar -xf – )

修改成：

+       cd $(BUILDDIR); tar -c –exclude=*.o $(TESTDIR) | ( cd $(DESTDIR) && tar -xf – )

sources/meta/poky/meta/recipes-support/attr/acl.inc

tar -cf – test/ –exclude nfs | ( cd ${D}${PTEST_PATH} && tar -xf – )

修改成：

tar -c –exclude=nfs test/ | ( cd ${D}${PTEST_PATH} && tar -xf – )

sources/meta/poky/meta/recipes-support/attr/attr.inc

tar -cf – test/ –exclude ext | ( cd ${D}${PTEST_PATH} && tar -xf – )

修改成：

tar -c –exclude=ext test/ | ( cd ${D}${PTEST_PATH} && tar -xf – )

sources/meta/poky/meta/recipes-devtools/perl/perl-ptest.inc

tar -cf – * –exclude \*.o –exclude libperl.so –exclude Makefile –exclude makefile –exclude hostperl \

–exclude miniperl –exclude generate_uudmap –exclude patches | ( cd ${D}${PTEST_PATH} && tar -xf – )

修改成：

        tar -c –exclude=\*.o –exclude=libperl.so –exclude=Makefile –exclude=makefile –exclude=hostperl \

                –exclude=miniperl –exclude=generate_uudmap –exclude=patches * | ( cd ${D}${PTEST_PATH} && tar -x )

编译问题3（libunwind_1.1.bb的do_compile报错）：

错误：make[1]: latex2man: Command not found

解决：

$ sudo yum install texlive-tetex

$ sudo rpm -ivh ~/latex2man-1.18-2.noarch.rpm

编译问题3（qt5-app_1.0.bb的do_compile报错）：

错误（有一批类似的错误）：ld: cannot find -lgtest

解决：

$ vi atc_linux/application/btate/btate.pro

equals(MY_BUILD_SYSTEM, atc) {

    LIBS += -L $(DA_LIBDIR)/lib -lgtest -lpthread -lbluetoothclient -lglobalbus -lappobj -lapputils

} else {

    LIBS += -L$(DA_TOP)/application/lib -L$(DA_TOP)/../../sources/build/tmp/work/armv7a-vfp-neon-poky-linux-gnueabi/atc-binarys/1.0-r0/image/usr/lib -lgtest -lpthread -lbluetoothclient -l

globalbus -lappobj -lapputils

}

$ vi atc_linux/application/gps/gps_bin.pro

equals(MY_BUILD_SYSTEM, atc) {

    LIBS += -L $(DA_LIBDIR)/lib  -lapputils  -lglobalbus -lappobj -lgps

} else {

    LIBS += -L$(DA_TOP)/application/lib -L$(DA_TOP)/../../sources/build/tmp/work/armv7a-vfp-neon-poky-linux-gnueabi/gpsd/3.10-r0/gpsd-3.10/ -lapputils  -lglobalbus -lappobj -lgps

}

$ vi atc_linux/application/dvr/dvr_bin.pro

equals(MY_BUILD_SYSTEM, atc) {

        LIBS    += -L${DA_TOP}/lib/lib/ -ldvr -ludev -lsurface_atc -lglobalbus -lappobj -lapputils -lstorage_atc -lgps

} else {

        LIBS    += -L${DA_TOP}/application/lib -L$(DA_TOP)/../../sources/build/tmp/work/armv7a-vfp-neon-poky-linux-gnueabi/gpsd/3.10-r0/gpsd-3.10/ -ldvr -ludev -lsurface_atc -lglobalbus –

lappobj -lapputils -lstorage_atc -lgps

}

$ vi atc_linux/application/dvr/dvr_bin.pro

INCLUDEPATH +=  ${DA_TOP}/kernel/kernel-3.18/drivers/ \

                ../common/  \

                ../utils/   \

                ../appobj/include/          \

                ../globalbus/include/       \

                ../appcommon/include/       \

                ../storage_atc/             \

                ../dvr/gps/             \

                ../gps/include/         \

                ../gps/includeex/       \

编译问题4（makall报错）：

报错：./makall: line 169: mkisofs: command not found

解决：$ sudo yum install mkisofs

编译问题5（修改ac83xx_systemd_defconfig再编译时报错）：

报错：Applying patch remove-selinux-android.patch

patching file system/extras/ext4_utils/make_ext4fs.c

Hunk #1 FAILED at 62.

1 out of 1 hunk FAILED — rejects in file system/extras/ext4_utils/make_ext4fs.c

解决：

$ vi sources/meta/meta-atc/recipes-devtools/android-tools/android-tools_5.1.1.r37.bb

在里面做个假的do_patch()，bitbake会优先使用本bb文件的do_patch()函数。

do_patch(){

}

编译问题6（修改ac83xx_systemd_defconfig再编译时报错）：

报错：sources/build/tmp/work/armv7a-vfp-neon-poky-linux-gnueabi/qtbase/5.5.0+gitAUTOINC+c619d2daac-r0/git/src/corelib/tools/qregexp.cpp:3947:1: internal compiler error: in add_stores, at var-tracking.c:6000

解决：

$ cd sources/meta/poky/meta/recipes-devtools/gcc/gcc-4.9/

$ wget http://openlinux.windriver.com/overc/sources/core2_64/gcc-4.9.2-r0.1/0062-gcc-var-tracking.c-backport-from-gcc-trunk-r212178.patch

$ vi sources/meta/poky/meta/recipes-devtools/gcc/gcc-4.9.inc

    file://0058-gcc-r212171.patch \

    file://0059-gcc-PR-rtl-optimization-63348.patch \

    file://target-gcc-includedir.patch \

    file://0062-gcc-var-tracking.c-backport-from-gcc-trunk-r212178.patch \

其实就是这个文件：

$ cat 0062-gcc-var-tracking.c-backport-from-gcc-trunk-r212178.patch

From Mon Sep 17 00:00:00 2001

From: =?UTF-8?q?Stefan=20M=C3=BCller-Klieser?= <[email protected]>

Date: Tue, 7 Apr 2015 16:15:11 +0200

Subject: [PATCH] gcc/var-tracking.c: backport from gcc trunk r212178

MIME-Version: 1.0

Content-Type: text/plain; charset=UTF-8

Content-Transfer-Encoding: 8bit

resolves a bug seen on cortexa8 building qt5 libraries.

2014-06-30 Joseph Myers <[email protected]>

* var-tracking.c (add_stores): Return instead of asserting if old

and new values for conditional store are the same.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@212178 138bc75d-0d04-0410-961f-82ee72b054a4

Signed-off-by: Stefan Müller-Klieser <[email protected]>

---

gcc/var-tracking.c | 3 ++-

1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/var-tracking.c b/gcc/var-tracking.c

index 65d8285..7c38910 100644

--- a/gcc/var-tracking.c

+++ b/gcc/var-tracking.c

@@ -5997,7 +5997,8 @@ add_stores (rtx loc, const_rtx expr, void *cuip)

{

cselib_val *oval = cselib_lookup (oloc, GET_MODE (oloc), 0, VOIDmode);

- gcc_assert (oval != v);

+ if (oval == v)

+ return;

gcc_assert (REG_P (oloc) || MEM_P (oloc));

if (oval && !cselib_preserved_value_p (oval))

--

1.9.1

编译问题7（修改ac83xx_systemd_defconfig再编译时报错）：

报错：libevdev/1.2.2-r0/libevdev-1.2.2/test/test-main.c:24:19: fatal error: check.h: No such file or directory

解决：

$ vi meta/poky/meta/recipes-support/libevdev/libevdev_1.2.2.bb

LIC_FILES_CHKSUM = “file://COPYING;md5= \

                    file://libevdev/libevdev.h;endline=21;md5=″

DEPENDS += “libcheck”

SRC_URI = “ http://www.freedesktop.org/software/libevdev/ ${BP}.tar.xz”

编译问题8（修改ac83xx_systemd_defconfig再编译时报错）：

报错：python报错： ‘do_rootfs’, lineno: 17, function

Exception: CalledProcessError: Command ‘[‘’, ‘-ks’, …

解决：没有实际问题，重新编译一次即可，可能是机器太忙导致超时，或者某个命令执行不成功。

编译问题9（preuboot编译工具问题）：

报错：make: armv7a-mediatek451_001_vfp-linux-gnueabi-gcc: Command not found

解决：

$ vi atc_linux/bootloader/preuboot/Makefile

#CROSS_COMPILE  :=armv7a-mediatek451_001_vfp-linux-gnueabi-

CROSS_COMPILE  :=arm-poky-linux-gnueabi-

$ vi ../../atc_linux/bootloader/preuboot/driver/mmc/include/linux/list.h

#ifndef NULL

   #define NULL 0

#endif

Ⅱ linux内核和 MTK 内核有什么区别

首先我纠正一个问题，Linux内核是指操作系统的内核，其主要是针对硬件的大多数操作。Mtk内核：市场上很多Mtk芯片都是arm架构然后集成一些显卡过着视频硬解芯片的集成解决方案。按照严格上的定义Mtk内核不能与Linux的内核进行比照。因为会产生一下误区。
1.Mtk平台往大了说也算是单片机（微控制器）的一种，广泛应用于嵌入式平台,如手机，mp3，mp4，模拟游戏机等等。所以Mtk是硬件。Linux是软件。
2.Linux内核泛指开源内核，现在很多Linux的衍生系统都是接受了Linux的开源协议，但是很多衍生系统又具有自己不开放的部分核心源码，就造成了Linux系统的衍生系统很多，故Linux内核再大多数时候指代的是纯Linux开源码的内核系，请注意，此处为系统。

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