NVIDIA Jetson TX1 Kernel kernel compilation

First, the preparatory work

1. Download the latest kernel on the website Source Code :

https://developer.nvidia.com/embedded/downloads#?tx= $software, L4T-TX1

2, ubuntu16.04 compilation environment preparation:

Download two cross compiler Aarch64-linux-gnu and ARM-LINUX-GNUEABIHF, both compilers are required for cross-compilation, and can be downloaded on Linaro website: https://www.linaro.org/downloads/

3, decompression kernel source code and cross-compiler in the appropriate location:

TAR-XVJF kernel_src.tbz2

Second, kernel compilation

1. Export Environment variables

$ Export Cross_compile=<crossbin>

$ Export CROSS32CC=<CROSS32BNI>GCC

$ Export arch=arm64

2. Compile kernel file Zimage

$ make Mrproper

$ make Tegra21_defconfig

$ make Zimage

3. Compile kernel device tree components:

$ make Dtbs

4. Compile kernel modules

$ make Modules

Under all normal circumstances, the compiled target file can be obtained under ~/kernel/arch/arm64/boot. But the normal situation is always very few, the general compilation process will encounter some problems, then summarize the problems I encountered in compiling and solutions, for reference only.

Third, the compilation encountered problems to solve

1. Compile error: Prompt missing compiler-gcc6.h file

This is because the compiler AARCH64-LINUX-GNU used is 6.2.1 version, that is, GCC6 series version, view TX1 ~/include/linux/, only gcc5 the following version of the file

This problem, download complier-gcc6.h on the internet to ~/kernel/include/linux/can solve the problem.

2. Compile error: R7 cannot be used in ASM here

This error online has a solution:

Https://tls.mbed.org/kb/development/arm-thumb-error-r7-cannot-be-used-in-asm-here

Https://developer.ridgerun.com/wiki/index.php?title=Compiling_Tegra_X1_source_code#Flashing_the_board

Not much to say, directly affixed to the Git-diff

Index:kernel_source/arch/arm64/kernel/vdso32/makefile

===================================================================

---kernel_source.orig/arch/arm64/kernel/vdso32/makefile 2016-04-08 21:28:52.651992663-0600

+ + + kernel_source/arch/arm64/kernel/vdso32/makefile 2016-04-11 12:20:03.377388110-0600

@@ -11,7 +11,7 @@

Gcov_profile: = n

-ccflags-y: =-shared-fpic-fno-common-fno-builtin-march=armv7-a

+ccflags-y: =-shared-fpic-fomit-frame-pointer-fno-common-fno-builtin-march=armv7-a

Ccflags-y + =-nostdlib-wl,-soname=linux-vdso32.so.1 \

$ (Call cc-ldoption,-wl$ (comma)--hash-style=sysv)

Asflags-y: =-d__vdso32__-S

3, the new compiler GCC6 encountered "-werror=misleading-indentation"

The reason behind the GCC website is that the compiler has added many new features.

Specific reference: https://gcc.gnu.org/gcc-6/porting_to.html

But the source of this kind of things, not recommended to change the code directly, so try to avoid. Use #pragma to circumvent and add the following code to the code snippet you need to protect

#pragma GCC diagnostic push

#pragma GCC diagnostic ignored "-wmisleading-indentation" ("double quotes contain ignored errors")

/* (code for which the warning are to be disabled) */

#pragma GCC diagnostic POPs

Many of these similar problems are encountered during compilation and are modified as such.

4, make menuconfig hint: Unable to find the ncurses libraries ....

Workaround:

Sudo Apt-get Install Libncurses5-dev

Finish.