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Apply OS checks to host platform, not build

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Previously, the build system used uname(1) output when it wanted to
check the operating system it was being built for, which meant that it
didn't take into-account cross-compilation when the build and host
operating systems were different.

To fix this, instead of consulting uname output, we consult the host
triple, specifically the third "kernel" part.

For "kernel"s with stable ABIs, like Linux or Cygwin, we can use a
simple ifeq to test whether we're compiling for that system, but for
other platforms, like Darwin, FreeBSD, or Solaris, we have to use a
more complicated check to take into account the version numbers at the
end of the "kernel"s.  I couldn't find a way to just strip these
version numbers in GNU Make without shelling out, which would be even
more ugly IMO.  Because these checks differ between kernels, and the
patsubst ones are quite fiddly, I've added variables for each host OS
we might want to check to make them easier to reuse.
This commit is contained in:
Alyssa Ross 2021-06-01 07:58:21 +00:00
parent 8e6ee1b9e9
commit 4f80464645
No known key found for this signature in database
GPG key ID: F9DBED4859B271C0
13 changed files with 48 additions and 27 deletions
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1
Makefile.config.in
View file

@ -1,3 +1,4 @@
HOST_OS = @host_os@
AR = @AR@
BDW_GC_LIBS = @BDW_GC_LIBS@
BOOST_LDFLAGS = @BOOST_LDFLAGS@

2
misc/launchd/local.mk
View file

@ -1,4 +1,4 @@
ifeq ($(OS), Darwin)
ifdef HOST_DARWIN
$(eval $(call install-data-in, $(d)/org.nixos.nix-daemon.plist, $(prefix)/Library/LaunchDaemons))

2
misc/systemd/local.mk
View file

@ -1,4 +1,4 @@
ifeq ($(OS), Linux)
ifdef HOST_LINUX
$(foreach n, nix-daemon.socket nix-daemon.service, $(eval $(call install-file-in, $(d)/$(n), $(prefix)/lib/systemd/system, 0644)))

2
misc/upstart/local.mk
View file

@ -1,4 +1,4 @@
ifeq ($(OS), Linux)
ifdef HOST_LINUX
$(foreach n, nix-daemon.conf, $(eval $(call install-file-in, $(d)/$(n), $(sysconfdir)/init, 0644)))

27
mk/lib.mk
View file

@ -10,8 +10,25 @@ bin-scripts :=
noinst-scripts :=
man-pages :=
install-tests :=
OS = $(shell uname -s)
ifdef HOST_OS
HOST_KERNEL = $(firstword $(subst -, ,$(HOST_OS)))
ifeq ($(HOST_KERNEL), cygwin)
HOST_CYGWIN = 1
endif
ifeq ($(patsubst darwin%,,$(HOST_KERNEL)),)
HOST_DARWIN = 1
endif
ifeq ($(patsubst freebsd%,,$(HOST_KERNEL)),)
HOST_FREEBSD = 1
endif
ifeq ($(HOST_KERNEL), linux)
HOST_LINUX = 1
endif
ifeq ($(patsubst solaris%,,$(HOST_KERNEL)),)
HOST_SOLARIS = 1
endif
endif
# Hack to define a literal space.
space :=
@ -50,16 +67,16 @@ endif
BUILD_SHARED_LIBS ?= 1
ifeq ($(BUILD_SHARED_LIBS), 1)
ifeq (CYGWIN,$(findstring CYGWIN,$(OS)))
ifdef HOST_CYGWIN
GLOBAL_CFLAGS += -U__STRICT_ANSI__ -D_GNU_SOURCE
GLOBAL_CXXFLAGS += -U__STRICT_ANSI__ -D_GNU_SOURCE
else
GLOBAL_CFLAGS += -fPIC
GLOBAL_CXXFLAGS += -fPIC
endif
ifneq ($(OS), Darwin)
ifneq ($(OS), SunOS)
ifneq ($(OS), FreeBSD)
ifndef HOST_DARWIN
ifndef HOST_SOLARIS
ifndef HOST_FREEBSD
GLOBAL_LDFLAGS += -Wl,--no-copy-dt-needed-entries
endif
endif

18
mk/libraries.mk
View file

@ -1,9 +1,9 @@
libs-list :=
ifeq ($(OS), Darwin)
ifdef HOST_DARWIN
SO_EXT = dylib
else
ifeq (CYGWIN,$(findstring CYGWIN,$(OS)))
ifdef HOST_CYGWIN
SO_EXT = dll
else
SO_EXT = so
@ -59,7 +59,7 @@ define build-library
$(1)_OBJS := $$(addprefix $(buildprefix), $$(addsuffix .o, $$(basename $$(_srcs))))
_libs := $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_PATH))
ifeq (CYGWIN,$(findstring CYGWIN,$(OS)))
ifdef HOST_CYGWIN
$(1)_INSTALL_DIR ?= $$(bindir)
else
$(1)_INSTALL_DIR ?= $$(libdir)
@ -73,18 +73,18 @@ define build-library
ifeq ($(BUILD_SHARED_LIBS), 1)
ifdef $(1)_ALLOW_UNDEFINED
ifeq ($(OS), Darwin)
ifdef HOST_DARWIN
$(1)_LDFLAGS += -undefined suppress -flat_namespace
endif
else
ifneq ($(OS), Darwin)
ifneq (CYGWIN,$(findstring CYGWIN,$(OS)))
ifndef HOST_DARWIN
ifndef HOST_CYGWIN
$(1)_LDFLAGS += -Wl,-z,defs
endif
endif
endif
ifneq ($(OS), Darwin)
ifndef HOST_DARWIN
$(1)_LDFLAGS += -Wl,-soname=$$($(1)_NAME).$(SO_EXT)
endif
@ -93,7 +93,7 @@ define build-library
$$($(1)_PATH): $$($(1)_OBJS) $$(_libs) | $$(_d)/
$$(trace-ld) $(CXX) -o $$(abspath $$@) -shared $$(LDFLAGS) $$(GLOBAL_LDFLAGS) $$($(1)_OBJS) $$($(1)_LDFLAGS) $$($(1)_LDFLAGS_PROPAGATED) $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_LDFLAGS_USE)) $$($(1)_LDFLAGS_UNINSTALLED)
ifneq ($(OS), Darwin)
ifndef HOST_DARWIN
$(1)_LDFLAGS_USE += -Wl,-rpath,$$(abspath $$(_d))
endif
$(1)_LDFLAGS_USE += -L$$(_d) -l$$(patsubst lib%,%,$$(strip $$($(1)_NAME)))
@ -108,7 +108,7 @@ define build-library
$$(trace-ld) $(CXX) -o $$@ -shared $$(LDFLAGS) $$(GLOBAL_LDFLAGS) $$($(1)_OBJS) $$($(1)_LDFLAGS) $$($(1)_LDFLAGS_PROPAGATED) $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_LDFLAGS_USE_INSTALLED))
$(1)_LDFLAGS_USE_INSTALLED += -L$$(DESTDIR)$$($(1)_INSTALL_DIR) -l$$(patsubst lib%,%,$$(strip $$($(1)_NAME)))
ifneq ($(OS), Darwin)
ifndef HOST_DARWIN
ifeq ($(SET_RPATH_TO_LIBS), 1)
$(1)_LDFLAGS_USE_INSTALLED += -Wl,-rpath,$$($(1)_INSTALL_DIR)
else

8
nix-rust/local.mk
View file

@ -11,12 +11,12 @@ libnixrust_INSTALL_PATH := $(libdir)/libnixrust.$(SO_EXT)
libnixrust_LDFLAGS_USE := -L$(d)/target/$(RUST_DIR) -lnixrust
libnixrust_LDFLAGS_USE_INSTALLED := -L$(libdir) -lnixrust
ifeq ($(OS), Linux)
ifdef HOST_LINUX
libnixrust_LDFLAGS_USE += -ldl
libnixrust_LDFLAGS_USE_INSTALLED += -ldl
endif
ifeq ($(OS), Darwin)
ifdef HOST_DARWIN
libnixrust_BUILD_FLAGS = NIX_LDFLAGS="-undefined dynamic_lookup"
else
libnixrust_LDFLAGS_USE += -Wl,-rpath,$(abspath $(d)/target/$(RUST_DIR))
@ -31,7 +31,7 @@ $(libnixrust_PATH): $(call rwildcard, $(d)/src, *.rs) $(d)/Cargo.toml
$(libnixrust_INSTALL_PATH): $(libnixrust_PATH)
$(target-gen) cp $^ $@
ifeq ($(OS), Darwin)
ifdef HOST_DARWIN
install_name_tool -id $@ $@
endif
@ -40,7 +40,7 @@ clean: clean-rust
clean-rust:
$(suppress) rm -rfv nix-rust/target
ifneq ($(OS), Darwin)
ifndef HOST_DARWIN
check: rust-tests
rust-tests:

1
perl/Makefile.config.in
View file

@ -1,3 +1,4 @@
HOST_OS = @host_os@
CC = @CC@
CFLAGS = @CFLAGS@
CXX = @CXX@

2
perl/configure.ac
View file

@ -7,6 +7,8 @@ CXXFLAGS=
AC_PROG_CC
AC_PROG_CXX
AC_CANONICAL_HOST
# Use 64-bit file system calls so that we can support files > 2 GiB.
AC_SYS_LARGEFILE

2
perl/local.mk
View file

@ -28,7 +28,7 @@ Store_CXXFLAGS = \
Store_LDFLAGS := $(SODIUM_LIBS) $(NIX_LIBS)
ifeq (CYGWIN,$(findstring CYGWIN,$(OS)))
ifdef HOST_CYGWIN
archlib = $(shell perl -E 'use Config; print $$Config{archlib};')
libperl = $(shell perl -E 'use Config; print $$Config{libperl};')
Store_LDFLAGS += $(shell find ${archlib} -name ${libperl})

2
src/libexpr/local.mk
View file

@ -16,7 +16,7 @@ libexpr_CXXFLAGS += -I src/libutil -I src/libstore -I src/libfetchers -I src/lib
libexpr_LIBS = libutil libstore libfetchers
libexpr_LDFLAGS = -lboost_context
ifeq ($(OS), Linux)
ifdef HOST_LINUX
libexpr_LDFLAGS += -ldl
endif

6
src/libstore/local.mk
View file

@ -9,11 +9,11 @@ libstore_SOURCES := $(wildcard $(d)/*.cc $(d)/builtins/*.cc $(d)/build/*.cc)
libstore_LIBS = libutil
libstore_LDFLAGS = $(SQLITE3_LIBS) -lbz2 $(LIBCURL_LIBS) $(SODIUM_LIBS) -pthread
ifeq ($(OS), Linux)
ifdef HOST_LINUX
libstore_LDFLAGS += -ldl
endif
ifeq ($(OS), Darwin)
ifdef HOST_DARWIN
libstore_FILES = sandbox-defaults.sb sandbox-minimal.sb sandbox-network.sb
endif
@ -23,7 +23,7 @@ ifeq ($(ENABLE_S3), 1)
libstore_LDFLAGS += -laws-cpp-sdk-transfer -laws-cpp-sdk-s3 -laws-cpp-sdk-core
endif
ifeq ($(OS), SunOS)
ifdef HOST_SOLARIS
libstore_LDFLAGS += -lsocket
endif

2
src/resolve-system-dependencies/local.mk
View file

@ -1,4 +1,4 @@
ifeq ($(OS), Darwin)
ifdef HOST_DARWIN
programs += resolve-system-dependencies
endif