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Use buildprefix in a few more places

Browse source 
`installcheck` doesn't yet work, but the rest of the build can now
happen mostly inside a separate build directory.

Progress on #9342

Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
This commit is contained in:
John Ericson 2023-11-25 00:33:21 -05:00
parent a8fea5a54f
commit 52e0911302
11 changed files with 64 additions and 35 deletions
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6
Makefile
View file

@ -1,5 +1,7 @@
-include Makefile.config
clean-files += Makefile.config
include mk/build-dir.mk
-include $(buildprefix)Makefile.config
clean-files += $(buildprefix)Makefile.config
ifeq ($(ENABLE_BUILD), yes)
makefiles = \

25
doc/manual/src/contributing/hacking.md
View file

@ -146,6 +146,31 @@ $ nix build .#packages.aarch64-linux.default
Cross-compiled builds are available for ARMv6 (`armv6l-linux`) and ARMv7 (`armv7l-linux`).
Add more [system types](#system-type) to `crossSystems` in `flake.nix` to bootstrap Nix on unsupported platforms.
### Building for multiple platforms at once
It is useful to perform multiple cross and native builds on the same source tree,
for example to ensure that better support for one platform doesn't break the build for another.
In order to facilitate this, Nix has some support for being built out of tree – that is, placing build artefacts in a different directory than the source code:
1. Create a directory for the build, e.g.
```bash
mkdir build
```
2. Run the configure script from that directory, e.g.
```bash
cd build
../configure <configure flags>
```
3. Run make from the source directory, but with the build directory specified, e.g.
```bash
make builddir=build <make flags>
```
## System type
Nix uses a string with he following format to identify the *system type* or *platform* it runs on:

10
mk/build-dir.mk Normal file
View file

@ -0,0 +1,10 @@
# Initialise support for build directories.
builddir ?=
ifdef builddir
buildprefix = $(builddir)/
buildprefixrel = $(builddir)
else
buildprefix =
buildprefixrel = .
endif

11
mk/install-dirs.mk Normal file
View file

@ -0,0 +1,11 @@
# Default installation paths.
prefix ?= /usr/local
libdir ?= $(prefix)/lib
bindir ?= $(prefix)/bin
libexecdir ?= $(prefix)/libexec
datadir ?= $(prefix)/share
localstatedir ?= $(prefix)/var
sysconfdir ?= $(prefix)/etc
mandir ?= $(prefix)/share/man
DESTDIR ?=

23
mk/lib.mk
View file

@ -43,27 +43,6 @@ define newline
endef
# Default installation paths.
prefix ?= /usr/local
libdir ?= $(prefix)/lib
bindir ?= $(prefix)/bin
libexecdir ?= $(prefix)/libexec
datadir ?= $(prefix)/share
localstatedir ?= $(prefix)/var
sysconfdir ?= $(prefix)/etc
mandir ?= $(prefix)/share/man
# Initialise support for build directories.
builddir ?=
ifdef builddir
buildprefix = $(builddir)/
else
buildprefix =
endif
# Pass -fPIC if we're building dynamic libraries.
BUILD_SHARED_LIBS ?= 1
@ -94,6 +73,8 @@ ifeq ($(BUILD_DEBUG), 1)
endif
include mk/build-dir.mk
include mk/install-dirs.mk
include mk/functions.mk
include mk/tracing.mk
include mk/clean.mk

8
mk/templates.mk
View file

@ -10,10 +10,10 @@ endef
ifneq ($(MAKECMDGOALS), clean)
%.h: %.h.in
$(trace-gen) rm -f $@ && ./config.status --quiet --header=$@
$(buildprefix)%.h: %.h.in
$(trace-gen) rm -f $@ && cd $(buildprefixrel) && ./config.status --quiet --header=$(@:$(buildprefix)%=%)
%: %.in
$(trace-gen) rm -f $@ && ./config.status --quiet --file=$@
$(buildprefix)%: %.in
$(trace-gen) rm -f $@ && cd $(buildprefixrel) && ./config.status --quiet --file=$(@:$(buildprefix)%=%)
endif

2
src/libcmd/local.mk
View file

@ -12,4 +12,4 @@ libcmd_LDFLAGS = $(EDITLINE_LIBS) $(LOWDOWN_LIBS) -pthread
libcmd_LIBS = libstore libutil libexpr libmain libfetchers
$(eval $(call install-file-in, $(d)/nix-cmd.pc, $(libdir)/pkgconfig, 0644))
$(eval $(call install-file-in, $(buildprefix)$(d)/nix-cmd.pc, $(libdir)/pkgconfig, 0644))

4
src/libexpr/local.mk
View file

@ -36,7 +36,7 @@ $(d)/lexer-tab.cc $(d)/lexer-tab.hh: $(d)/lexer.l
clean-files += $(d)/parser-tab.cc $(d)/parser-tab.hh $(d)/lexer-tab.cc $(d)/lexer-tab.hh
$(eval $(call install-file-in, $(d)/nix-expr.pc, $(libdir)/pkgconfig, 0644))
$(eval $(call install-file-in, $(buildprefix)$(d)/nix-expr.pc, $(libdir)/pkgconfig, 0644))
$(foreach i, $(wildcard src/libexpr/value/*.hh), \
$(eval $(call install-file-in, $(i), $(includedir)/nix/value, 0644)))
@ -47,4 +47,4 @@ $(d)/primops.cc: $(d)/imported-drv-to-derivation.nix.gen.hh
$(d)/eval.cc: $(d)/primops/derivation.nix.gen.hh $(d)/fetchurl.nix.gen.hh $(d)/flake/call-flake.nix.gen.hh
src/libexpr/primops/fromTOML.o: ERROR_SWITCH_ENUM =
$(buildprefix)src/libexpr/primops/fromTOML.o: ERROR_SWITCH_ENUM =

2
src/libmain/local.mk
View file

@ -14,4 +14,4 @@ libmain_LIBS = libstore libutil
libmain_ALLOW_UNDEFINED = 1
$(eval $(call install-file-in, $(d)/nix-main.pc, $(libdir)/pkgconfig, 0644))
$(eval $(call install-file-in, $(buildprefix)$(d)/nix-main.pc, $(libdir)/pkgconfig, 0644))

2
src/libstore/local.mk
View file

@ -59,7 +59,7 @@ $(d)/build.cc:
clean-files += $(d)/schema.sql.gen.hh $(d)/ca-specific-schema.sql.gen.hh
$(eval $(call install-file-in, $(d)/nix-store.pc, $(libdir)/pkgconfig, 0644))
$(eval $(call install-file-in, $(buildprefix)$(d)/nix-store.pc, $(libdir)/pkgconfig, 0644))
$(foreach i, $(wildcard src/libstore/builtins/*.hh), \
$(eval $(call install-file-in, $(i), $(includedir)/nix/builtins, 0644)))

4
tests/functional/local.mk
View file

@ -140,9 +140,9 @@ ifeq ($(ENABLE_BUILD), yes)
endif
$(d)/test-libstoreconsumer.sh.test $(d)/test-libstoreconsumer.sh.test-debug: \
$(d)/test-libstoreconsumer/test-libstoreconsumer
$(buildprefix)$(d)/test-libstoreconsumer/test-libstoreconsumer
$(d)/plugins.sh.test $(d)/plugins.sh.test-debug: \
$(d)/plugins/libplugintest.$(SO_EXT)
$(buildprefix)$(d)/plugins/libplugintest.$(SO_EXT)
install-tests += $(foreach x, $(nix_tests), $(d)/$(x))