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|
# Hadrian for Make users
## tl;dr
For GHC hackers already used to the Make build system, here is what you need to
know:
- You can still boot and configure yourself.
- Use `hadrian/build.{sh, bat}` instead of `make`. It supports `-j`. This build
script will from now on be referred to as simply `build`.
- Add the `-c` flag if you want hadrian to boot and configure the source tree
for you.
- Build products are not in `inplace` anymore, but `_build` by default. Your
stage 2 GHC would then be at `_build/stage1/bin/ghc` (because it's built by
the stage 1 compiler).
- The build root is configurable with `--build-root` or `-o`.
- You can pick the build flavour with `--flavour=X` where X is `perf`, `prof`,
etc.
- You can run tests with `build test`, and specific ones by adding
`--only="T12345 T11223"` for example.
- GHCs built by Hadrian are relocatable on Windows, Linux, OS X and FreeBSD.
This means you can move the `<build root>/stage1/{lib, bin}` directories
around and GHC will still happily work, as long as both directories stay next
to each other.
Of particular interest is the `--build-root/-o` option, which is often useful to
work on different things or build GHC in different ways, from the same
directory/GHC checkout, without having to sacrifice the build artifacts every
time you fire up a build. This is not possible with the Make build system.
## Equivalent commands
- Building a complete stage 2 compiler with its libraries, default flavour
``` sh
# Make
make
# Hadrian
build
```
- Building with many cores
``` sh
# Make
make -j8
# Hadrian
build -j8
```
- Bulding a stage 1 or 2 GHC executable
``` sh
# Make
make inplace/bin/ghc-stage1
make inplace/bin/ghc-stage2
# Hadrian
build stage1:exe:ghc-bin # using the simple target name
build _build/stage0/bin/ghc # OR using the actual path
build stage2:exe:ghc-bin # simple target
build _build/stage1/bin/ghc # OR actual path
```
- Building and registering a library with the stage 2 compiler
``` sh
# Make
make inplace/lib/package.conf.d/text-1.2.3.0.conf
# Hadrian
build stage2:lib:text # simple target
build _build/stage1/lib/package.conf.d/text-1.2.3.0.conf # OR actual path
```
- Building with a particular flavour (e.g `quickest`)
``` sh
# Make
echo "BuildFlavour=quickest" >> mk/build.mk
make
# Hadrian
build --flavour=quickest
```
- Building with `integer-simple` as the integer library
``` sh
# Make
echo "INTEGER_LIBRARY=integer-simple" >> mk/build.mk
make
# Hadrian
build --integer-simple
```
- Freezing the stage 1 GHC compiler
``` sh
# Make
echo "stage=2" >> mk/build.mk
make
# Hadrian
build --freeze1
```
- Running the testsuite
``` sh
# Make
make test # (1)
make test TEST=plugins01 # (2)
make test TEST="plugins01 plugins02" # (3)
# Hadrian
build test # equivalent to (1)
build test --only=plugins01 # equivalent to (2)
TEST=plugins01 build test # equivalent to (2)
build test --only="plugins01 plugins02" # equivalent to (3)
TEST="plugins01 plugins02" build test # equivalent to (3)
TEST=plugins01 build test --only=plugins02 # equivalent to (3)
```
As illustrated in the examples above, you can use the `TEST` environment
variable, the `--only=...` flag or even both to restrict your testsuite run
to some (usually small) subset of the testsuite.
See [the docs for the test rules](./testsuite.md) if you want to know about
all the options that hadrian supports and what they correspond to in the Make
build system.
- Generate the `platformConstants` file to be used for stage 1/2 GHC
``` sh
# Make
make inplace/lib/platformConstants
# Hadrian
build _build/stage0/lib/platformConstants
build _build/stage1/lib/platformConstants
```
- Build a static library for base with the stage 1 compiler
``` sh
# Make
make libraries/base/dist-install/build/libHSbase-4.12.0.0.a
# Hadrian
build _build/stage1/libraries/base/build/libHSbase-4.12.0.0.a
```
- Generate haddocks, user guide, etc
``` sh
# Make
make docs
# Hadrian
build docs
```
- Running nofib
``` sh
# Make
cd nofib; make clean; make boot; make 2>&1 | tee nofib-log
# Hadrian
build nofib # builds the compiler and everything we need if necessary, too
```
|
