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-rw-r--r--docs/BUILDING.md47
1 files changed, 25 insertions, 22 deletions
diff --git a/docs/BUILDING.md b/docs/BUILDING.md
index 4ed139c..db5d721 100644
--- a/docs/BUILDING.md
+++ b/docs/BUILDING.md
@@ -4,10 +4,9 @@ Building `bfs`
Compiling
---------
-`bfs` uses [GNU Make](https://www.gnu.org/software/make/) as its build system.
A simple invocation of
- $ make config
+ $ ./configure
$ make
should build `bfs` successfully.
@@ -18,7 +17,6 @@ For example, to use all your cores, run `make -j$(nproc)`.
| Command | Description |
|------------------|---------------------------------------------------------------|
-| `make config` | Configures the build system |
| `make` | Builds just the `bfs` binary |
| `make all` | Builds everything, including the tests (but doesn't run them) |
| `make check` | Builds everything, and runs the tests |
@@ -33,13 +31,13 @@ The configuration system provides a few shorthand flags for handy configurations
| Command | Description |
|-------------------------|-------------------------------------------------------------|
-| `make config RELEASE=y` | Build `bfs` with optimizations, LTO, and without assertions |
-| `make config ASAN=y` | Enable [AddressSanitizer] |
-| `make config LSAN=y` | Enable [LeakSanitizer] |
-| `make config MSAN=y` | Enable [MemorySanitizer] |
-| `make config TSAN=y` | Enable [ThreadSanitizer] |
-| `make config UBSAN=y` | Enable [UndefinedBehaviorSanitizer] |
-| `make config GCOV=y` | Enable [code coverage] |
+| `./configure RELEASE=y` | Build `bfs` with optimizations, LTO, and without assertions |
+| `./configure ASAN=y` | Enable [AddressSanitizer] |
+| `./configure LSAN=y` | Enable [LeakSanitizer] |
+| `./configure MSAN=y` | Enable [MemorySanitizer] |
+| `./configure TSAN=y` | Enable [ThreadSanitizer] |
+| `./configure UBSAN=y` | Enable [UndefinedBehaviorSanitizer] |
+| `./configure GCOV=y` | Enable [code coverage] |
[AddressSanitizer]: https://github.com/google/sanitizers/wiki/AddressSanitizer
[LeakSanitizer]: https://github.com/google/sanitizers/wiki/AddressSanitizerLeakSanitizer#stand-alone-mode
@@ -48,21 +46,20 @@ The configuration system provides a few shorthand flags for handy configurations
[UndefinedBehaviorSanitizer]: https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html
[code coverage]: https://gcc.gnu.org/onlinedocs/gcc/Gcov.html
-You can combine multiple profiles (e.g. `make config ASAN=y UBSAN=y`), but not all of them will work together.
+You can combine multiple profiles (e.g. `./configure ASAN=y UBSAN=y`), but not all of them will work together.
### Flags
-Other flags can be specified on the `make config` command line or in the environment.
+Other flags can be specified on the `./configure` command line or in the environment.
Here are some of the common ones; check the [`Makefile`](/Makefile) for more.
| Flag | Description |
|-------------------------------------|----------------------------------------------------|
-| `CC` | The C compiler to use, e.g. `make config CC=clang` |
+| `CC` | The C compiler to use, e.g. `./configure CC=clang` |
| `CFLAGS`<br>`EXTRA_CFLAGS` | Override/add to the default compiler flags |
| `LDFLAGS`<br>`EXTRA_LDFLAGS` | Override/add to the linker flags |
| `USE_LIBACL`<br>`USE_LIBCAP`<br>... | Enable/disable [optional dependencies] |
| `TEST_FLAGS` | `tests.sh` flags for `make check` |
-| `BUILDDIR` | The build output directory (default: `.`) |
| `DESTDIR` | The root directory for `make install` |
| `PREFIX` | The installation prefix (default: `/usr`) |
| `MANDIR` | The man page installation directory |
@@ -72,9 +69,9 @@ Here are some of the common ones; check the [`Makefile`](/Makefile) for more.
### Dependencies
`bfs` depends on some system libraries for some of its features.
-These dependencies are optional, and can be turned off in `make config` if necessary by setting the appropriate variable to `n` (e.g. `make config USE_ONIGURUMA=n`).
+These dependencies are optional, and can be turned off in `./configure` if necessary by setting the appropriate variable to `n` (e.g. `./configure USE_ONIGURUMA=n`).
-| Dependency | Platforms | `make config` flag |
+| Dependency | Platforms | `./configure` flag |
|--------------|------------|--------------------|
| [libacl] | Linux only | `USE_LIBACL` |
| [libcap] | Linux only | `USE_LIBCAP` |
@@ -90,22 +87,28 @@ These dependencies are optional, and can be turned off in `make config` if neces
### Dependency tracking
-The build system automatically tracks header dependencies with the `-M` family of compiler options (see `DEPFLAGS` in the [`Makefile`](/Makefile)).
+The build system automatically tracks header dependencies with the `-M` family of compiler options (see `DEPFLAGS` in [`build/deps.mk`](/build/deps.mk)).
So if you edit a header file, `make` will rebuild the necessary object files ensuring they don't go out of sync.
We also add a dependency on the current configuration, so you can change configurations and rebuild without having to `make clean`.
-
-We go one step further than most build systems by tracking the flags that were used for the previous compilation.
-That means you can change configurations without having to `make clean`.
For example,
- $ make config
+ $ ./configure
$ make
- $ make config RELEASE=y
+ $ ./configure RELEASE=y
$ make
will build the project in debug mode and then rebuild it in release mode.
+### Out-of-tree builds
+
+You can set up an out-of-tree build by running the `configure` script from another directory, for example:
+
+ $ mkdir out
+ $ cd out
+ $ ../configure
+ $ make
+
Testing
-------