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slang v0.2.5

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@github-actions github-actions released this 29 Oct 00:01
· 56 commits to main since this release
v0.2.5
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Learn about vigilant mode.

Build speed and stack safety since v0.2.4:

  • Development builds: slangc --dev (or SLANG_DEV=1) compiles the generated C at -O0 without LTO, for edit-and-rerun loops such as zokor watch: a 21k-line service rebuilds in about 16 s instead of 73 s. Tasks start on a 32KB stack with a 16KB safepoint margin, and dev and release builds are cached apart. Not for deployment: the program uses about 1.6x the CPU.
  • Frame guards are remembered between builds (~/.cache/slang/frames/, or $SLANG_CACHE/frames/), so a rebuild compiles the C once instead of two or three times (that 21k-line service: 225 s to 73 s).
  • Generated codecs are frame-guarded: json.decode/json.encode, pg.rows_as and inspect of a wide struct (200+ fields) no longer overflow the task stack.
  • macOS: slangc builds with -flto=thin. Xcode 15's linker dropped the frame report under full LTO, so no function was guarded there.
  • Linux: functions gcc reports under a clone's name (.constprop, .isra, .part, .lto_priv) are guarded.
  • GC: result, opt and struct values with GC roots carry explicit, zeroed padding, so stale padding words are no longer scanned as possible pointers and cannot keep dead objects alive.

Install

From a tarball (relocatable: unpack anywhere and run in place). Pick
the one for your platform below; each was unpacked outside the source tree
and used to build and run a new project before this release was published.

tar -xzf slang-0.2.5-darwin-arm64.tar.gz
./slang-0.2.5-darwin-arm64/bin/slangc --version     # slangc 0.2.5

From source:

git clone https://github.com/dolphlabs/slang && cd slang
git checkout v0.2.5
sudo make install          # PREFIX=/usr/local, or ~/.local

slangc new hello && cd hello && slangc main.sl --run

Upgrading a source install: run sudo make uninstall from the old
checkout first. make install overwrites the binary but never deletes
stale runtime files.

Requirements

slangc compiles to C, so every platform needs a C compiler (cc).

you import you need
anything a C compiler
net with TLS, crypto, httpc over https OpenSSL (macOS: brew install openssl; Debian/Ubuntu: apt install libssl-dev)
sql SQLite (Debian/Ubuntu: apt install libsqlite3-dev; ships with macOS)
compress, httpc zlib (Debian/Ubuntu: apt install zlib1g-dev; ships with macOS)

The Linux tarballs are built on Ubuntu 24.04 and need glibc 2.39 or later;
on an older distribution, build from source.

SHA-256

509d074c15141bc05c139f79d8baf1c82ac6f0836dc4000530dd51b58917b37c  slang-0.2.5-darwin-arm64.tar.gz
8f64f64e5735233af053160510903579a7c2e6350eca0d0d6ccfd40b20974990  slang-0.2.5-darwin-x86_64.tar.gz
2d3e9751ad15429c921e4ff3adf7acc203c4e105e6238e26635954c577fb9b7f  slang-0.2.5-linux-aarch64.tar.gz
d7c3b8ecf63039e1c43aa12a3bce7505446a07074261007c6c47544d3dab1e8b  slang-0.2.5-linux-x86_64.tar.gz
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