Macros

spksrc ships a small set of GNU Make helper macros in mk/spksrc.common/macros.mk. They are loaded automatically: spksrc.common.mk includes spksrc.common/macros.mk first, so the macros are available in any package Makefile that includes a spksrc entry point (spksrc.cross-cc.mk, spksrc.spk.mk, ...).

Architecture awareness is loaded early too

The same spksrc.common.mk also pulls in the parse-time toolchain pre-bootstrap (spksrc.common/stage0.mk) and the architecture classification (spksrc.common/archs.mk). That is what makes TC_GCC and the architecture groups available while a package's DEPENDS are parsed, so version- and arch-gated dependencies resolve correctly on a cold tree.

Version comparison

These compare two version strings (natural/sort -V order) and return 1 when the test is true, empty otherwise — ideal for ifeq:

Macro	True when
$(call version_le,A,B)	A ≤ B
$(call version_ge,A,B)	A ≥ B
$(call version_lt,A,B)	A < B
$(call version_gt,A,B)	A > B

# Pull a dependency only on a recent enough toolchain
ifeq ($(call version_ge,$(TC_GCC),8.5),1)
DEPENDS += python/numpy-latest
endif

# Apply a workaround on older compilers
ifeq ($(call version_lt,$(TC_GCC),5.0),1)
ADDITIONAL_CFLAGS += -std=gnu99
endif

List helpers

Macro	Purpose
$(call uniq,<list>)	Remove duplicate words, preserving order
$(call dedup,<string>,<delimiter>)	De-duplicate a delimiter-separated string, preserving order
$(call dedup-files,<files>)	Remove duplicate files (compared by md5sum), preserving order

BUILD_DEPENDS := $(call uniq,spk/$(FFMPEG_PACKAGE) $(BUILD_DEPENDS))

SPK_DEPENDS := $(call dedup,$(PYTHON_PACKAGE):$(SPK_DEPENDS),:)

See also

• Developer Guide: Makefile Variables — where these macros are commonly used
• Reference: Architectures — the architecture groups available for ifeq conditions