How do I install the Methodology Sdcc Vanilla skill?

Run npx skillmds@latest add z88dk/methodology-sdcc-vanilla in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Methodology Sdcc Vanilla safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Methodology Sdcc Vanilla?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Methodology Sdcc Vanilla free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Methodology Sdcc Vanilla?

z88dk (@z88dk) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Methodology Sdcc Vanilla by z88dk — Agent Skill

Name: Methodology Sdcc Vanilla
Author: z88dk

Methodology Sdcc Vanilla

Vanilla upstream SDCC (not zsdcc) benchmark recipes: /usr/local/bin/sdcc, svn pin vs --version #NNNN, makebin -p, map-sum size, support/benchmarks/*/sdcc. Use when remesuring SDCC rows, tagging 4.6.0 #16608, or comparing stock SDCC to z88dk-zsdcc. Do not use for -compiler=sdcc / zsdcc patch work.

z88dk e0a0bb1 3.5 KB Updated Sep 17, 2026

File contents

Methodology — vanilla SDCC benches

Vanilla SDCC is stock upstream sdcc. It is not bin/z88dk-zsdcc.

	Vanilla	zsdcc
Binary	`/usr/local/bin/sdcc` (or PATH `sdcc`)	`bin/z88dk-zsdcc` via `zcc -compiler=sdcc`
ABI	`__sdcccall(1)` (stock)	ABI 0 (`src/zsdcc/sdcc-z88dk.patch`)
C / float	SDCC’s own	z88dk classic or newlib
Published tag	`SDCC 4.6.0 #16608 Linux`	`zsdcc 4.6.0 #16639`
Recipes	`support/benchmarks/<bench>/sdcc/readme.txt`	`z88dk-classic/` / `z88dk-new/`

Never put a vanilla number in a Z88DK/SDCC wiki row. Never put a zsdcc number in an sdcc/ RESULT block.

zsdcc pin and patch: skill compiler-zsdcc. TIMER house rules: methodology-measure.

Pin vs banner

Upstream checkout is svn r16639 (4.6.0 final). ChangeLog $Revision$ is often 16608. sdcc --version prints #16608 unless you patch ChangeLog (do not patch a vanilla tree).

Publish the banner (#16608). In notes you may say “checkout r16639”.

Host tree

Preferred peer of z88dk: /data/sdcc (or ../sdcc from the z88dk root).

svn checkout -r 16639 https://svn.code.sf.net/p/sdcc/code/trunk/sdcc /data/sdcc

Configure with unused ports off. --disable-f8-port leaves f8l on. Also pass --disable-f8l-port or the build asks for sdasf8.

Do not apply src/zsdcc/sdcc-z88dk.patch to this tree. After a patch dry-run, revert:

svn revert -R ChangeLog src/SDCCasm.c src/SDCCglue.c src/SDCCmain.c \
  src/SDCCopt.c src/z80/main.c src/z80/peep.c

Keyword-only ChangeLog may need a check that $Revision$ is back to 16608.

Compile and size

From each sdcc/readme.txt (z80):

sdcc -mz80 -DSTATIC -DTIMER --max-allocs-per-node200000 foo.c -o foo.ihx
makebin -p foo.ihx foo.bin

makebin -p needs the output path. Do not use hex2bin.

TIMER labels are __asm__("TIMER_START:");. The optimiser warns z80instructionSize(); ignore that.

Size = sum of map sections in that readme (CODE + HEADER* + …). It is not the z88dk .bin “bytes less page zero” rule.

Ticks: z88dk-ticks -mz80 foo.bin -start <hex> -end <hex> -counter 999999999999. Resolve addresses from .sym / .map as the readme shows. CPU flag before the binary.

Publish

Update sdcc/readme.txt RESULT and the parent summary row for SDCC (not Z88DK/SDCC).
Date the block. Tag SDCC 4.6.0 #16608 Linux (or the live banner).
Wiki Benchmarks.md SDCC rows only. No vanilla SDCC in Classic--Maths-Libraries.md.
Do not stage wiki-*.md.

Known traps

Item	Action
`sort-equ-5000`	Stock K&R qsort on equals is O(n²). May not finish. Publish “did not finish”. Do not hang ticks for hours.
Equals / ordered 20	Still publish if they complete.
4.6.0 vs 4.2.0	Vanilla 4.6.0 is often slower on float/long than old 4.2.0 archive rows. Replace the archive row. Do not keep both.
hung `z88dk-ticks`	Wrong CPU flag, or counter too small. Kill the process.

compiler-zsdcc, methodology-measure, tool-ticks
Product recipes: support/benchmarks/*/sdcc/readme.txt

---name: methodology-sdcc-vanilladescription: Vanilla upstream SDCC (not zsdcc) benchmark recipes: /usr/local/bin/sdcc, svn pin vs --version #NNNN, makebin -p, map-sum size, support/benchmarks/*/sdcc. Use when remesuring SDCC rows, tagging 4.6.0 #16608, or comparing stock SDCC to z88dk-zsdcc. Do not use for -compiler=sdcc / zsdcc patch work.---# Methodology — vanilla SDCC benches**Vanilla SDCC** is stock upstream `sdcc`. It is **not** `bin/z88dk-zsdcc`.| | Vanilla | zsdcc ||--|---------|--------|| Binary | `/usr/local/bin/sdcc` (or PATH `sdcc`) | `bin/z88dk-zsdcc` via `zcc -compiler=sdcc` || ABI | `__sdcccall(1)` (stock) | ABI **0** (`src/zsdcc/sdcc-z88dk.patch`) || C / float | SDCC’s own | z88dk classic or newlib || Published tag | `SDCC 4.6.0 #16608 Linux` | `zsdcc 4.6.0 #16639` || Recipes | `support/benchmarks/<bench>/sdcc/readme.txt` | `z88dk-classic/` / `z88dk-new/` |Never put a vanilla number in a Z88DK/SDCC wiki row. Never put a zsdcc number in an `sdcc/` RESULT block.zsdcc pin and patch: skill **`compiler-zsdcc`**. TIMER house rules: **`methodology-measure`**.## Pin vs bannerUpstream checkout is svn **r16639** (4.6.0 final). `ChangeLog` `$Revision$` is often **16608**. `sdcc --version` prints `#16608` unless you patch ChangeLog (do **not** patch a vanilla tree).Publish the **banner** (`#16608`). In notes you may say “checkout r16639”.## Host treePreferred peer of z88dk: `/data/sdcc` (or `../sdcc` from the z88dk root).```bashsvn checkout -r 16639 https://svn.code.sf.net/p/sdcc/code/trunk/sdcc /data/sdcc```Configure with unused ports off. **`--disable-f8-port` leaves f8l on.** Also pass `--disable-f8l-port` or the build asks for `sdasf8`.**Do not apply** `src/zsdcc/sdcc-z88dk.patch` to this tree. After a patch dry-run, revert:```bashsvn revert -R ChangeLog src/SDCCasm.c src/SDCCglue.c src/SDCCmain.c \ src/SDCCopt.c src/z80/main.c src/z80/peep.c```Keyword-only `ChangeLog` may need a check that `$Revision$` is back to 16608.## Compile and sizeFrom each `sdcc/readme.txt` (z80):```bashsdcc -mz80 -DSTATIC -DTIMER --max-allocs-per-node200000 foo.c -o foo.ihxmakebin -p foo.ihx foo.bin````makebin -p` needs the **output** path. Do not use `hex2bin`.TIMER labels are `__asm__("TIMER_START:");`. The optimiser warns `z80instructionSize()`; ignore that.**Size** = sum of map sections in that readme (CODE + HEADER* + …). It is not the z88dk `.bin` “bytes less page zero” rule.**Ticks:** `z88dk-ticks -mz80 foo.bin -start <hex> -end <hex> -counter 999999999999`. Resolve addresses from `.sym` / `.map` as the readme shows. CPU flag **before** the binary.## Publish- Update `sdcc/readme.txt` RESULT and the parent summary row for **SDCC** (not Z88DK/SDCC).- Date the block. Tag `SDCC 4.6.0 #16608 Linux` (or the live banner).- Wiki `Benchmarks.md` SDCC rows only. No vanilla SDCC in `Classic--Maths-Libraries.md`.- Do not stage `wiki-*.md`.## Known traps| Item | Action ||------|--------|| `sort-equ-5000` | Stock K&R qsort on equals is O(n²). May not finish. Publish “did not finish”. Do not hang ticks for hours. || Equals / ordered 20 | Still publish if they complete. || 4.6.0 vs 4.2.0 | Vanilla 4.6.0 is often slower on float/long than old 4.2.0 archive rows. Replace the archive row. Do not keep both. || hung `z88dk-ticks` | Wrong CPU flag, or counter too small. Kill the process. |## Related- `compiler-zsdcc`, `methodology-measure`, `tool-ticks`- Product recipes: `support/benchmarks/*/sdcc/readme.txt`

Frequently asked questions