The stack setup
command¶
stack setup [GHC_VERSION] [--[no-]reinstall] [--ghc-bindist URL]
[--ghcjs-boot-options GHCJS_BOOT] [--[no-]ghcjs-boot-clean]
stack setup
attempts to install a version of GHC.
By default:
-
the version of GHC is the one required by the project. Specify the version of GHC as an argument to attempt to install a different version of GHC. For example
stack setup 9.4.4
will attempt to install GHC 9.4.4; and -
an attempt to install is made only if the version of GHC is not already available to Stack. Pass the flag
--reinstall
(disabled by default) to attempt to install the version of GHC regardless of whether it is already available to Stack.
Pass the option --ghc-bindist <url>
to specify the URL of the GHC to be
downloaded and installed. This option requires the use of the --ghc-variant
option specifying a custom GHC variant. For further information about the
--ghc-variant
option, see the see the
YAML configuration documentation.
If Stack is configured not to install GHC (install-ghc: false
or passing the
--no-install-ghc
flag) then stack setup
will warn that the flag and the
command are inconsistent and take no action.
A particular binary distribution of GHC will depend on certain libraries, which need to be available.
There are many different Linux distributions and different versions of a particular Linux distribution. One Linux distribution/version may make available different libraries to another Linux distribution/version.
In attempting to identify the particular binary distribution of GHC that is required on Linux, Stack will refer to the presence or absence of certain libraries or the versions of those libraries.
For example, Stack 2.9.3 considers:
-
if
libgmp.so.3
orlibgmp.so.10
is present. These files are provided by different versions of the GNU Multiple Precision Arithmetic Library. -
if
libncursesw.so.6
is present. This file is provided by a shared library for terminal handling with wide character support. -
if
libtinfo.so.5
orlibtinfo.so.6
is present. These files are provided by different versions of a shared low-level terminfo library for terminal handling.
Stack 2.9.3 uses ghc-build
:
tinfo6
to indicatelibgmp.so.10
andlibtinfo.so.6
are presentncurses6
to indicatelibgmp.so.10
andlibncursesw.so.6
are presentgmp4
to indicatelibgmp.so.3
is present
GHC also depends on libc6
, the
GNU C Library (glibc). The GNU C
Library is designed to be backwards compatible.
By default, versions of Stack up to 2.9.3 associate the tinfo6
build with
the 'Fedora 33' binary distribution of GHC 9.4.1 to 9.4.4. Those binary
distributions require versions of libc6
that are compatible with
libc6
2.32.
For Linux distributions/versions that provide versions of libc6
that are
not compatible with libc6
2.32 but are compatible with libc6
2.28, the
'Debian 10' binary distributions of GHC 9.4.1 to 9.4.4 may be a viable
alternative. They can be specified using a setup-info
key in a Stack
YAML configuration file (global or project-level), as follows:
setup-info:
ghc:
linux64-tinfo6:
9.4.1:
url: "https://downloads.haskell.org/~ghc/9.4.1/ghc-9.4.1-x86_64-deb10-linux.tar.xz"
content-length: 186574068
sha1: 7e885cae97fbf893d8d3e41e19131a6c73264941
sha256: dcbff828b14a59d01d3fda68bb01b9cbc3a321a0c013905f436df5627128aa58
9.4.2:
url: "https://downloads.haskell.org/~ghc/9.4.2/ghc-9.4.2-x86_64-deb10-linux.tar.xz"
content-length: 184995132
sha1: 004f5aec6ab60ca95ddd78fa2b99d6d7657e6a06
sha256: 5bf34ef70a2b824d45e525f09690c76707b7f01698962e425e8fd78b94ea9174
9.4.3:
url: "https://downloads.haskell.org/~ghc/9.4.3/ghc-9.4.3-x86_64-deb10-linux.tar.xz"
content-length: 184837364
sha1: 28a94f2da6077d725a7d72f48bc909cf9f2444e3
sha256: 940ac2b1770dc63b5f3f38f829bfe69f4a572d6b26cd93094cdd99d5300b5067
9.4.4:
url: "https://downloads.haskell.org/~ghc/9.4.4/ghc-9.4.4-x86_64-deb10-linux.tar.xz"
content-length: 187207372
sha1: e8b22f0c2b523e368a7df557e8ee915c42790cb9
sha256: a3ecd2426bb519d6fdad05904c386f1c74b433f07722b0d1ef606c23159ade2d
Examples of such Linux distributions/versions are Debian 10 itself,
Debian 11 (libc6
2.31), and Ubuntu 20.04 (libc6
2.31).