v0.9.2: add Windows link-flags branch + windows-amd64 cross-compile config

Message

sokolgfx + sokolgp with SOKOLGLCORE on Windows MinGW need no extra link libs beyond what sigil-app supplies: the embedded Win32 GL loader (SOKOLUSEWIN32GLLOADER at sokolgfx.h:5556) pulls opengl32.dll dynamically via LoadLibraryA + wglGetProcAddress (sokolgfx.h:9131), and the only system import it needs is GetProcAddress from kernel32, which sigil-app already links. sokol_gfx.h's own MinGW/MSYS2 link docs confirm this explicitly (only -ld3d11 is needed extra, and only for the D3D11 backend).

Add an explicit (windows) '() branch with a comment documenting the reasoning, so a future reader doesn't "helpfully" add -lopengl32.

Add a windows-amd64 config (toolchain: 'zig, target: x86_64-windows-gnu) to match sigil-app v0.8.3. Without this, 'sigil build --config windows-amd64' silently cross-compiles for the host — the .a archive contains Linux ELF objects in a directory named windows-amd64/.

Changed

 package.sgl | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

Diff

package.sglmodified

@@ -5,7 +5,7 @@

(package

name: "sigil-graphics"

−8

version: "0.9.1"

version: "0.9.2"

description: "2D graphics, image loading, and font rendering for Sigil"

url: "https://codeberg.org/sigil/sigil-graphics"

license: "BSD-3-Clause"

@@ -21,7 +21,20 @@

name: 'release

output-dir: "build/release"

debug?: #f

−24

optimize: 2))

+24

optimize: 2)

+25

+26

;; Windows x86_64 (MinGW via zig) — built so downstream consumers

+27

;; (e.g., cinder-cantata) can produce Windows binaries from Linux.

+28

;; Mirrors the windows-amd64 config in sigil-audio and the main sigil package.

+29

(config

+30

name: 'windows-amd64

+31

output-dir: "build/windows-amd64"

+32

toolchain: 'zig

+33

target: "x86_64-windows-gnu"

+34

static?: #t

+35

debug?: #f

+36

optimize: 2

+37

features: '(release cross windows)))

dependencies: (list

(from-git url: "codeberg:sigil/sigil" package: "sigil-stdlib" version: "^0.13.0")

@@ -34,10 +47,14 @@

"src/c/graphics.c" "src/c/image.c" "src/c/font.c")

c-include-dirs: '("vendor/sokol" "vendor/stb")

native-init: "sigil__init_sigil_graphics_module"

−37

;; Platform-specific linker flags for OpenGL

+50

;; Platform-specific linker flags for OpenGL.

+51

;; Windows: sokol_gfx's GL backend loads opengl32.dll dynamically via

+52

;; LoadLibraryA + GetProcAddress (kernel32 — linked via sigil-app), so no

+53

;; extra link libs are needed beyond what sigil-app provides.

link-flags: (case (host-os)

((linux) '("-lGL"))

((darwin) '("-framework" "OpenGL" "-framework" "Metal" "-framework" "MetalKit"))

+57

((windows) '())

(else '()))))

tasks: (list