diffsol-c 0.8.0

A diffsol wrapper featuring runtime scalar/matrix/solver types and a C API
Documentation 
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#!/usr/bin/make -f
# Build the Debian packages libdiffsol<soversion> and libdiffsol-dev from the crate diffsol-c.
# Run `debian/prepare.sh` first: it writes the files that depend on the crate version (control,
# changelog, soversion and the .install file of the runtime package).
#
# Cargo writes the library as libdiffsol_c.so. The packages install it as
# libdiffsol.so.<version>, with the SONAME libdiffsol.so.<soversion>, so that the names of the
# library and of the packages agree.

include /usr/share/dpkg/pkg-info.mk
include /usr/share/dpkg/architecture.mk

VERSION := $(DEB_VERSION_UPSTREAM)
SOVERSION := $(shell cat debian/soversion)
LIBDIR := usr/lib/$(DEB_HOST_MULTIARCH)

# The LLVM package of the distribution, which the library links as a shared library.
LLVM := $(shell cat debian/llvm-version)
FEATURES := diffsl-cranelift,diffsl-llvm$(LLVM)-prefer-dynamic,diffsl-external-dynamic
# llvm-sys finds LLVM with the variable LLVM_SYS_<llvm-sys major version>_PREFIX
LLVM_SYS_15 := 150
LLVM_SYS_16 := 160
LLVM_SYS_17 := 170
LLVM_SYS_18 := 181
LLVM_SYS_19 := 191
LLVM_SYS_20 := 201
LLVM_SYS_21 := 211
export LLVM_SYS_$(LLVM_SYS_$(LLVM))_PREFIX ?= /usr/lib/llvm-$(LLVM)
# bindgen (for the Enzyme bindings of diffsl) needs libclang
export LIBCLANG_PATH ?= /usr/lib/llvm-$(LLVM)/lib

# the crate is part of the workspace two directories up
export CARGO_TARGET_DIR ?= $(abspath $(CURDIR)/../../target)
# build.rs gives the library this SONAME
export DIFFSOL_SONAME := libdiffsol.so.$(SOVERSION)

%:
	dh $@

override_dh_auto_build:
	cargo build -p diffsol-c --release --features $(FEATURES)
	# llvm-sys links LLVM statically if it does not find the shared library: stop if it did
	readelf -d $(CARGO_TARGET_DIR)/release/libdiffsol_c.so | grep -q 'NEEDED.*libLLVM' \
		|| { echo "error: the library does not link libLLVM dynamically" >&2; exit 1; }

override_dh_auto_install:
	install -D -m 0644 $(CARGO_TARGET_DIR)/release/libdiffsol_c.so \
		debian/tmp/$(LIBDIR)/libdiffsol.so.$(VERSION)
	ln -s libdiffsol.so.$(VERSION) debian/tmp/$(LIBDIR)/$(DIFFSOL_SONAME)
	ln -s $(DIFFSOL_SONAME) debian/tmp/$(LIBDIR)/libdiffsol.so
	install -D -m 0644 $(CARGO_TARGET_DIR)/release/include/diffsol.h \
		debian/tmp/usr/include/diffsol.h
	mkdir -p debian/tmp/$(LIBDIR)/pkgconfig
	sed -e 's|@VERSION@|$(VERSION)|' -e 's|@LIBDIR@|/$(LIBDIR)|' debian/diffsol.pc.in \
		> debian/tmp/$(LIBDIR)/pkgconfig/diffsol.pc

# the workflow tests the installed packages; the build keeps the Cargo target directory
override_dh_auto_test:
override_dh_auto_clean:

# a release build of the library has no debug information
override_dh_strip:
	dh_strip --no-automatic-dbgsym
override_dh_dwz: