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cairo: fix a few "wrong" defaults (#49415)

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Having variants all conditional leaves a lot more degree of freedom to clingo,
and slows down the search.

If variants have inconsistent defaults, we might end up with multiple, equally 
sub-optimal solutions. Sometimes this creates a "plateau" in the search space.

Remove conditional boolean variants that can't be activated, since this just increases
the complexity of the model.

If 4 variants have to be all active / inactive together, it's better to use a single requires, 
than to explode it into multiple statements dealing with a single variant at a time.

Signed-off-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>
This commit is contained in:
Massimiliano Culpo 2025-03-11 17:05:23 +01:00 committed by GitHub
parent cb4d3a9fc2
commit 9875a0e807
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GPG Key ID: B5690EEEBB952194
1 changed files with 37 additions and 90 deletions
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127
var/spack/repos/builtin/packages/cairo/package.py
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@ -45,14 +45,18 @@ class Cairo(AutotoolsPackage, MesonPackage):
variant("X", default=False, description="Build with X11 support")
variant("gobject", default=False, description="Enable cairo's gobject functions feature")
variant("svg", default=False, description="Enable cairo's SVG functions feature")
variant("png", default=False, description="Enable cairo's PNG functions feature")
# doesn't exist @1.17.8: but kept as compatibility
variant("pdf", default=False, description="Enable cairo's PDF surface backend feature")
variant("ft", default=False, description="Enable cairo's FreeType font backend feature")
variant("fc", default=False, description="Enable cairo's Fontconfig font backend feature")
# variants and build system depends for the autotools builds
with when("build_system=autotools"):
variant("png", default=False, description="Enable cairo's PNG functions feature")
variant("svg", default=False, description="Enable cairo's SVG functions feature")
variant("pic", default=True, description="Enable position-independent code (PIC)")
variant("pdf", default=False, description="Enable cairo's PDF surface backend feature")
variant("ft", default=False, description="Enable cairo's FreeType font backend feature")
variant("fc", default=False, description="Enable cairo's Fontconfig font backend feature")
# seems to be an older cairo limitation as cairo@1.18.2 seems to build fine against libpng
conflicts("+png", when="platform=darwin")
@ -74,71 +78,23 @@ class Cairo(AutotoolsPackage, MesonPackage):
# https://gitlab.freedesktop.org/cairo/cairo/-/blob/1.18.2/meson_options.txt
with when("build_system=meson"):
variant("dwrite", default=False, description="Microsoft Windows DWrite font backend")
# doesn't exist @1.17.8: but kept as compatibility
variant(
"pdf",
default=False,
description="""+pdf is combined into +zlib now, kept seperate for compatibility.
+pdf implies +zlib now. Please use the updated variants""",
)
# svg is combined into png now, kept seperate for compatibility
variant(
"svg",
default=False,
description="""+svg is combined into +png now, kept seperate for compatibility.
+svg implies +png now. Please use the updated variants""",
)
# meson seems to have assumptions about what is enabled/disabled
# these four compile best if +variant in unison, otherwise various errors happen
# if these aren't in sync. It is easier to have a sane default. conflicts below
# to try to protect known incompatibilities
variant("png", default=True, description="Enable cairo's PNG and SVG functions feature")
variant("ft", default=True, description="Enable cairo's FreeType font backend feature")
variant("fc", default=True, description="Enable cairo's Fontconfig font backend feature")
variant(
"zlib",
default=True,
default=False,
description="Enable cairo's script, ps, pdf, xml functions feature",
)
variant("quartz", default=False, description="Enable cairo's Quartz functions feature")
variant("tee", default=False, description="Enable cairo's tee functions feature")
# not in spack
variant(
"spectre",
default=False,
description="Not available. Enable cairo's spectre functions feature",
)
# (bfd might be too old) with binutils 2.43.1 on macos
# so not sure how this is supposed to work
variant(
"symbol-lookup",
default=False,
description="Not available. Enable cairo's symbol lookup functions feature",
)
# not currently supported variants
conflicts("+spectre", msg="Not currently supported")
conflicts("+symbol-lookup", msg="Not currently supported")
# meson seems to have assumptions about what is enabled/disabled
# so this protects against incompatible combinations
conflicts("~zlib+png", msg="+png requires +zlib")
conflicts("~ft+fc", msg="+fc requires +ft")
conflicts("+ft~fc", msg="+ft requires +fc")
conflicts("+ft+fc~zlib", msg="+fc+ft requires +zlib")
conflicts("+fc+ft~png+zlib", msg="+ft+fc+zlib requires +png")
# +pdf implies zlib now
requires("+zlib", when="+pdf")
requires("~zlib", when="~pdf", msg="+pdf implies +zlib now")
# +svg implies png now
requires("+svg", when="+png")
requires("~png", when="~svg", msg="+svg implies +png now")
requires(
"~zlib~ft~fc~png~pdf",
"+zlib+ft+fc+png+pdf",
policy="one_of",
msg="these variants must be activated, or deactivated, together",
)
# https://gitlab.freedesktop.org/cairo/cairo/-/blob/1.18.2/meson.build?ref_type=tags#L2
depends_on("meson@1.3.0:", type="build")
@ -146,19 +102,16 @@ class Cairo(AutotoolsPackage, MesonPackage):
# both autotools and meson need this for auto discovery of depends
depends_on("pkgconfig", type="build")
# non build system specific depends
# versions that use (the old) autotools build
with when("@:1.17.4"):
depends_on("pixman@0.36.0:", when="@1.17.2:")
depends_on("freetype", when="+ft")
depends_on("fontconfig@2.10.91:", when="+fc")
depends_on("libpng", when="+png")
depends_on("glib")
# non build system specific dependencies
depends_on("freetype", when="+ft")
depends_on("libpng", when="+png")
depends_on("glib")
depends_on("pixman@0.36.0:", when="@1.17.2:")
depends_on("fontconfig@2.10.91:", when="+fc")
# non build system specific depends
# versions that use (the new) meson build
with when("@1.18.0:"):
depends_on("binutils", when="+symbol-lookup")
depends_on("freetype@2.13.0:", when="+ft")
depends_on("libpng@1.4.0:", when="+png")
depends_on("glib@2.14:", when="+gobject")
@ -200,27 +153,21 @@ def enable_or_disable(self, feature_name, variant=None):
)
def meson_args(self):
args = []
args.append(self.enable_or_disable("dwrite"))
args.append(self.enable_or_disable("fontconfig", variant="ft"))
args.append(self.enable_or_disable("freetype", variant="fc"))
args.append(self.enable_or_disable("png"))
args.append(self.enable_or_disable("quartz"))
args.append(self.enable_or_disable("tee"))
args.append(self.enable_or_disable("xcb"))
args.append(self.enable_or_disable("xlib", variant="X"))
args.append(self.enable_or_disable("xlib-xcb", variant="X"))
args.append(self.enable_or_disable("zlib"))
args.append(self.enable_or_disable("glib", variant="gobject"))
args.append(self.enable_or_disable("spectre"))
args.append(self.enable_or_disable("symbol-lookup"))
args = [
self.enable_or_disable("dwrite"),
self.enable_or_disable("fontconfig", variant="ft"),
self.enable_or_disable("freetype", variant="fc"),
self.enable_or_disable("png"),
self.enable_or_disable("quartz"),
self.enable_or_disable("tee"),
self.enable_or_disable("xcb"),
self.enable_or_disable("xlib", variant="X"),
self.enable_or_disable("xlib-xcb", variant="X"),
self.enable_or_disable("zlib"),
self.enable_or_disable("glib", variant="gobject"),
"-Dspectre=disabled",
"-Dsymbol-lookup=disabled",
]
return args