2017年8月6日 · I am using as and gcc to assemble and create executables of ARM assembly programs, as recommended by this tutorial, as follows: Given an assembly source file, program.s, I run: as -o program.o program.s Then: gcc -o program program.o However, running gcc on the assembly source directly like so: gcc -o program program.s yields the same result.

2011年5月11日 · Here is an excellent doc.. Tool chains have a loose name convention like arch [-vendor] [-os] - eabi. arch - refers to target architecture (which in our case is ARM) vendor - refers to toolchain supplier os - refers to the target operating system eabi - refers to Embedded Application Binary Interface

Use the command line arm-eabi-gcc-4.7 -O2 -S -o - foo.c and add the switches for your platform (such as -mcpu=arm7tdmi for example). The command will print the generated assembly code on STDOUT. The command will print the generated assembly code on STDOUT.

2014年9月23日 · arm-linux-gcc should support all the flags and options of gcc, so all the generic stuff is same as compared to gcc. So you can use the gcc documentation on official GNU website. For something specific you can use the documentation of the specific compiler.

2018年11月5日 · Is there a way to get gcc to output the available -march=arch options? I'm getting build errors (tried -march=x86_64) and I don't know what my options are. The compiler I'm using is a proprietary

2012年8月10日 · @ahcox: ARM recommends that all compiler vendors targeting the Cortex-M3 series support those intrinsics, but can't force them; I would expect that GCC should support them, but I don't really know. As for other processors, I know the Cortex-M0 does not support those operations, but I would expect more advanced processors to do so.

2014年8月6日 · I'm working on a cortex-m3 board with a bare-metal toolchain without libc. I implemented memcpy which copies data byte-to-byte but it's too slow. In GCC manual, it says it provides __builtin_memcp...

2018年10月18日 · The "v" is important in ARM in telling the difference between a specific ARM core model vs. an ISA version. Remember that someone looking at a program that prints this string will just the see one string on their machine, not the whole table that makes it clear it could have been "ARM6T2" (which is more clearly just a corruption of ARMv6T2, not ...

From gcc doc:-mthumb-marm Select between generating code that executes in ARM and Thumb states. The default for most configurations is to generate code that executes in ARM state, but the default can be changed by configuring GCC with the --with-mode=state configure option.

2012年6月16日 · I am working on performance optimizations of ARM C/C++ code, compiled with GCC. CPU is Tegra 3. As I know flags -mthumb means generating old 16-bit Thumb instructions. On different tests, I have 10-15% performance increase with -marm against -mthumb. Is -mthumb used only for compatibility and for performance, while -marm is generally better?