Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add mohitmishra786/low-level-dev-skills --skill cross-gccgit clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/mohitmishra786/low-level-dev-skills/cross-gcc)<a href="https://agentmods.dev/skills/mohitmishra786/low-level-dev-skills/cross-gcc"><img src="https://agentmods.dev/badge/skills/mohitmishra786/low-level-dev-skills/cross-gcc/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/mohitmishra786/low-level-dev-skills/cross-gcc"><img src="https://agentmods.dev/badge/skills/mohitmishra786/low-level-dev-skills/cross-gcc.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk warn
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00099 | $0.01557 |
| Opus 5 | $0.00049 | $0.00779 |
| Sonnet 5 | $0.00020 | $0.00311 |
| Haiku 4.5 | $0.00010 | $0.00156 |
Grade B, and why
cross-gcc scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
sudo apt install gcc-aarch64-linux-gnu g++-aarch64-linux-gnu binutils-aarch64-linux-gnu How it starts
The opening of the file, as written. The whole thing — 164 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cross-GCC
Purpose
Guide agents through setting up and using cross-compilation GCC toolchains: triplets, sysroots, pkg-config, QEMU-based testing, and common failure modes.
Triggers
- "How do I compile for ARM on my x86 machine?"
- "I'm getting 'wrong ELF class' or 'cannot execute binary file'"
- "How do I set up a sysroot for cross-compilation?"
- "pkg-config returns host libraries in my cross build"
- "How do I debug a cross-compiled binary with QEMU + GDB?"
Workflow
1. Understand the triplet
A GNU triplet has the form <arch>-<vendor>-<os>-<abi> (often 3 or 4 parts):
| Triplet | Target |
|---|---|
aarch64-linux-gnu |
64-bit ARM Linux (glibc) |
arm-linux-gnueabihf |
32-bit ARM Linux hard-float |
arm-none-eabi |
Bare-metal ARM (no OS) |
riscv64-linux-gnu |
64-bit RISC-V Linux |
x86_64-w64-mingw32 |
Windows (MinGW) from Linux |
mipsel-linux-gnu |
Little-endian MIPS Linux |
2. Install the toolchain
# Debian/Ubuntu
sudo apt install gcc-aarch64-linux-gnu g++-aarch64-linux-gnu binutils-aarch64-linux-gnu
# For bare-metal ARM (Cortex-M)
sudo apt install gcc-arm-none-eabi binutils-arm-none-eabi
# Verify
aarch64-linux-gnu-gcc --version
3. Basic cross-compilation
# C
aarch64-linux-gnu-gcc -O2 -o hello hello.c
# C++
aarch64-linux-gnu-g++ -O2 -std=c++17 -o hello hello.cpp
# Bare-metal (no stdlib, no OS)
arm-none-eabi-gcc -mcpu=cortex-m4 -mthumb -mfloat-abi=hard -mfpu=fpv4-sp-d16 \
-ffreestanding -nostdlib -T linker.ld -o firmware.elf startup.s main.c
4. Sysroot
A sysroot is a directory containing the target's headers and libraries. Required when your code links against target-specific libraries.
# Use a sysroot
aarch64-linux-gnu-gcc --sysroot=/path/to/aarch64-sysroot -O2 -o prog main.c
# Common sysroot sources:
# - Raspberry Pi: download from raspbian/raspios
# - Debian multiarch: debootstrap --arch arm64 bullseye /tmp/sysroot
# - Yocto/Buildroot: generated automatically in build output
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 164 lines · 99 tokens per session scan B 256b20a58f9d
cross-gcc is a skill published in the GitHub repository mohitmishra786/low-level-dev-skills (201 stars, last pushed 2mo ago), licensed MIT. It adds 99 tokens to every session and 1,557 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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