Why does GHC run version 7.10.3 instead of 8.6.2?
I am new to Haskell (as in, have yet to write a single line of Haskell code). I recently downloaded GHC version 8.6.2 on Ubuntu 16.04 via the ppa:hvr/ghc. However, when I run
$ ghc --version
I get
The Glorious Glasgow Haskell Compilation System, version 7.10.3
I can run version 8.6.2 using the command
$ /opt/ghc/bin/ghc-8.6.2 --version
so I assume this is normal behaviour. However, I don't understand why it automatically runs version 7.10.3. Additionally, is there a way I can change it so that the ghc command will automatically run the latest version installed?
I did try searching for answers previously, but was unable to find any. Any explanations / help would be appreciated.
haskell ghc
asked Nov 20 '18 at 6:17
addieaddie
83
add a comment |
I am new to Haskell (as in, have yet to write a single line of Haskell code). I recently downloaded GHC version 8.6.2 on Ubuntu 16.04 via the ppa:hvr/ghc. However, when I run
$ ghc --version
I get
The Glorious Glasgow Haskell Compilation System, version 7.10.3
I can run version 8.6.2 using the command
$ /opt/ghc/bin/ghc-8.6.2 --version
so I assume this is normal behaviour. However, I don't understand why it automatically runs version 7.10.3. Additionally, is there a way I can change it so that the ghc command will automatically run the latest version installed?
I did try searching for answers previously, but was unable to find any. Any explanations / help would be appreciated.
haskell ghc
asked Nov 20 '18 at 6:17
addieaddie
83
1
It will run whichever comes first in your$PATH. Adjust your$PATH, so that /opt/ghc/bin comes first or uninstall the other GHC.
– sepp2k
Nov 20 '18 at 6:29
Do you have/opt/ghc/bin/:directory listed in the$PATHvariable..? If not you have an earlier version of GHC already installed in one of the directories listed under$PATHvariable.
– Redu
Nov 20 '18 at 6:32
Runwhich -a ghc; you should get back multiple paths.
– chepner
Nov 20 '18 at 14:08
add a comment |
I am new to Haskell (as in, have yet to write a single line of Haskell code). I recently downloaded GHC version 8.6.2 on Ubuntu 16.04 via the ppa:hvr/ghc. However, when I run
$ ghc --version
I get
The Glorious Glasgow Haskell Compilation System, version 7.10.3
I can run version 8.6.2 using the command
$ /opt/ghc/bin/ghc-8.6.2 --version
so I assume this is normal behaviour. However, I don't understand why it automatically runs version 7.10.3. Additionally, is there a way I can change it so that the ghc command will automatically run the latest version installed?
I did try searching for answers previously, but was unable to find any. Any explanations / help would be appreciated.
haskell ghc
asked Nov 20 '18 at 6:17
addieaddie
83
I am new to Haskell (as in, have yet to write a single line of Haskell code). I recently downloaded GHC version 8.6.2 on Ubuntu 16.04 via the ppa:hvr/ghc. However, when I run
$ ghc --version
I get
The Glorious Glasgow Haskell Compilation System, version 7.10.3
I can run version 8.6.2 using the command
$ /opt/ghc/bin/ghc-8.6.2 --version
so I assume this is normal behaviour. However, I don't understand why it automatically runs version 7.10.3. Additionally, is there a way I can change it so that the ghc command will automatically run the latest version installed?
I did try searching for answers previously, but was unable to find any. Any explanations / help would be appreciated.
haskell ghc
haskell ghc
asked Nov 20 '18 at 6:17
addieaddie
83
asked Nov 20 '18 at 6:17
addieaddie
83
asked Nov 20 '18 at 6:17
addieaddie
83
asked Nov 20 '18 at 6:17
addieaddie
83
asked Nov 20 '18 at 6:17
addieaddie
83
83
1
It will run whichever comes first in your$PATH. Adjust your$PATH, so that /opt/ghc/bin comes first or uninstall the other GHC.
– sepp2k
Nov 20 '18 at 6:29
Do you have/opt/ghc/bin/:directory listed in the$PATHvariable..? If not you have an earlier version of GHC already installed in one of the directories listed under$PATHvariable.
– Redu
Nov 20 '18 at 6:32
Runwhich -a ghc; you should get back multiple paths.
– chepner
Nov 20 '18 at 14:08
add a comment |
1
It will run whichever comes first in your$PATH. Adjust your$PATH, so that /opt/ghc/bin comes first or uninstall the other GHC.
– sepp2k
Nov 20 '18 at 6:29
Do you have/opt/ghc/bin/:directory listed in the$PATHvariable..? If not you have an earlier version of GHC already installed in one of the directories listed under$PATHvariable.
– Redu
Nov 20 '18 at 6:32
Runwhich -a ghc; you should get back multiple paths.
– chepner
Nov 20 '18 at 14:08
1
1
It will run whichever comes first in your
$PATH. Adjust your $PATH, so that /opt/ghc/bin comes first or uninstall the other GHC.– sepp2k
Nov 20 '18 at 6:29
It will run whichever comes first in your
$PATH. Adjust your $PATH, so that /opt/ghc/bin comes first or uninstall the other GHC.– sepp2k
Nov 20 '18 at 6:29
Do you have
/opt/ghc/bin/: directory listed in the $PATH variable..? If not you have an earlier version of GHC already installed in one of the directories listed under $PATH variable.– Redu
Nov 20 '18 at 6:32
Do you have
/opt/ghc/bin/: directory listed in the $PATH variable..? If not you have an earlier version of GHC already installed in one of the directories listed under $PATH variable.– Redu
Nov 20 '18 at 6:32
Run
which -a ghc; you should get back multiple paths.– chepner
Nov 20 '18 at 14:08
Run
which -a ghc; you should get back multiple paths.– chepner
Nov 20 '18 at 14:08
add a comment |
1 Answer
1
active
oldest
votes
You seem to have a misunderstanding about ghc, system administration, or both.
GHC ships as individual versions of the compiler - just as gcc or any other compiler I can think of. If you run the ghc 8.6.2 binary then it will report version 8.6.2. If you run some unknown ghc and ask it for the version, as you did with just $ ghc --version, then you'll see the results from the first ghc binary in the path. You can even find out which binary using which ghc and ls -l $(which ghc).
So you seem to have multiple GHC binaries installed. Again, this is something to do with your administration of this system. I suggest you:
- Go through and remove any previously installed GHC binaries from apt etc
- Set a path to include the HVR PPA ghc you just installed. For example, edit
$HOME/.bashrcif you use bash and addPATH=/opt/ghc/bin:$PATHto the end of the file.
answered Nov 20 '18 at 6:46
Thomas M. DuBuissonThomas M. DuBuisson
55.5k689153
add a comment |
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You seem to have a misunderstanding about ghc, system administration, or both.
GHC ships as individual versions of the compiler - just as gcc or any other compiler I can think of. If you run the ghc 8.6.2 binary then it will report version 8.6.2. If you run some unknown ghc and ask it for the version, as you did with just $ ghc --version, then you'll see the results from the first ghc binary in the path. You can even find out which binary using which ghc and ls -l $(which ghc).
So you seem to have multiple GHC binaries installed. Again, this is something to do with your administration of this system. I suggest you:
- Go through and remove any previously installed GHC binaries from apt etc
- Set a path to include the HVR PPA ghc you just installed. For example, edit
$HOME/.bashrcif you use bash and addPATH=/opt/ghc/bin:$PATHto the end of the file.
answered Nov 20 '18 at 6:46
Thomas M. DuBuissonThomas M. DuBuisson
55.5k689153
add a comment |
You seem to have a misunderstanding about ghc, system administration, or both.
GHC ships as individual versions of the compiler - just as gcc or any other compiler I can think of. If you run the ghc 8.6.2 binary then it will report version 8.6.2. If you run some unknown ghc and ask it for the version, as you did with just $ ghc --version, then you'll see the results from the first ghc binary in the path. You can even find out which binary using which ghc and ls -l $(which ghc).
So you seem to have multiple GHC binaries installed. Again, this is something to do with your administration of this system. I suggest you:
- Go through and remove any previously installed GHC binaries from apt etc
- Set a path to include the HVR PPA ghc you just installed. For example, edit
$HOME/.bashrcif you use bash and addPATH=/opt/ghc/bin:$PATHto the end of the file.
answered Nov 20 '18 at 6:46
Thomas M. DuBuissonThomas M. DuBuisson
55.5k689153
add a comment |
You seem to have a misunderstanding about ghc, system administration, or both.
GHC ships as individual versions of the compiler - just as gcc or any other compiler I can think of. If you run the ghc 8.6.2 binary then it will report version 8.6.2. If you run some unknown ghc and ask it for the version, as you did with just $ ghc --version, then you'll see the results from the first ghc binary in the path. You can even find out which binary using which ghc and ls -l $(which ghc).
So you seem to have multiple GHC binaries installed. Again, this is something to do with your administration of this system. I suggest you:
- Go through and remove any previously installed GHC binaries from apt etc
- Set a path to include the HVR PPA ghc you just installed. For example, edit
$HOME/.bashrcif you use bash and addPATH=/opt/ghc/bin:$PATHto the end of the file.
answered Nov 20 '18 at 6:46
Thomas M. DuBuissonThomas M. DuBuisson
55.5k689153
You seem to have a misunderstanding about ghc, system administration, or both.
GHC ships as individual versions of the compiler - just as gcc or any other compiler I can think of. If you run the ghc 8.6.2 binary then it will report version 8.6.2. If you run some unknown ghc and ask it for the version, as you did with just $ ghc --version, then you'll see the results from the first ghc binary in the path. You can even find out which binary using which ghc and ls -l $(which ghc).
So you seem to have multiple GHC binaries installed. Again, this is something to do with your administration of this system. I suggest you:
- Go through and remove any previously installed GHC binaries from apt etc
- Set a path to include the HVR PPA ghc you just installed. For example, edit
$HOME/.bashrcif you use bash and addPATH=/opt/ghc/bin:$PATHto the end of the file.
answered Nov 20 '18 at 6:46
Thomas M. DuBuissonThomas M. DuBuisson
55.5k689153
answered Nov 20 '18 at 6:46
Thomas M. DuBuissonThomas M. DuBuisson
55.5k689153
answered Nov 20 '18 at 6:46
Thomas M. DuBuissonThomas M. DuBuisson
55.5k689153
answered Nov 20 '18 at 6:46
Thomas M. DuBuissonThomas M. DuBuisson
55.5k689153
55.5k689153
add a comment |
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1
It will run whichever comes first in your
$PATH. Adjust your$PATH, so that /opt/ghc/bin comes first or uninstall the other GHC.– sepp2k
Nov 20 '18 at 6:29
Do you have
/opt/ghc/bin/:directory listed in the$PATHvariable..? If not you have an earlier version of GHC already installed in one of the directories listed under$PATHvariable.– Redu
Nov 20 '18 at 6:32
Run
which -a ghc; you should get back multiple paths.– chepner
Nov 20 '18 at 14:08