Commit 4d4d0770 authored by Sergei Trofimovich's avatar Sergei Trofimovich

systools: fix gcc version detecton on non-english locale

Summary:
ghc runs 'gcc -v' to check if we run under vanilla gcc
or disaguised clang by checking for string

    "gcc version <something>"

But this check does not always work as gcc has that string
localized via gettext mechanism:

    (some gcc's locale strings)
    be.po-msgstr "версія gcc %s\n"
    da.po-msgstr "GCC version %s\n"
    de.po-msgstr "gcc-Version %s %s\n"
    el.po-msgstr "έκδοση gcc %s\n"
    ...

To ping gcc to English locale we now override environment
variable with 'LANGUAGE=en' value.

Fixes Issue #8825
Signed-off-by: default avatarSergei Trofimovich <slyfox@gentoo.org>

Test Plan: validate

Reviewers: austin

Reviewed By: austin

Subscribers: simonmar, ezyang, carter

Differential Revision: https://phabricator.haskell.org/D185

GHC Trac Issues: #8825
parent 9711f78f
......@@ -492,6 +492,51 @@ readCreateProcess proc = do
return (ex, output)
readProcessEnvWithExitCode
:: String -- ^ program path
-> [String] -- ^ program args
-> [(String, String)] -- ^ environment to override
-> IO (ExitCode, String, String) -- ^ (exit_code, stdout, stderr)
readProcessEnvWithExitCode prog args env_update = do
current_env <- getEnvironment
let new_env = env_update ++ [ (k, v)
| let overriden_keys = map fst env_update
, (k, v) <- current_env
, k `notElem` overriden_keys
]
p = proc prog args
(_stdin, Just stdoh, Just stdeh, pid) <-
createProcess p{ std_out = CreatePipe
, std_err = CreatePipe
, env = Just new_env
}
outMVar <- newEmptyMVar
errMVar <- newEmptyMVar
_ <- forkIO $ do
stdo <- hGetContents stdoh
_ <- evaluate (length stdo)
putMVar outMVar stdo
_ <- forkIO $ do
stde <- hGetContents stdeh
_ <- evaluate (length stde)
putMVar errMVar stde
out <- takeMVar outMVar
hClose stdoh
err <- takeMVar errMVar
hClose stdeh
ex <- waitForProcess pid
return (ex, out, err)
-- Don't let gcc localize version info string, #8825
en_locale_env :: [(String, String)]
en_locale_env = [("LANGUAGE", "en")]
-- If the -B<dir> option is set, add <dir> to PATH. This works around
-- a bug in gcc on Windows Vista where it can't find its auxiliary
......@@ -746,8 +791,9 @@ getLinkerInfo' dflags = do
_ -> do
-- In practice, we use the compiler as the linker here. Pass
-- -Wl,--version to get linker version info.
(exitc, stdo, stde) <- readProcessWithExitCode pgm
["-Wl,--version"] ""
(exitc, stdo, stde) <- readProcessEnvWithExitCode pgm
["-Wl,--version"]
en_locale_env
-- Split the output by lines to make certain kinds
-- of processing easier. In particular, 'clang' and 'gcc'
-- have slightly different outputs for '-Wl,--version', but
......@@ -802,7 +848,8 @@ getCompilerInfo' dflags = do
-- Process the executable call
info <- catchIO (do
(exitc, stdo, stde) <- readProcessWithExitCode pgm ["-v"] ""
(exitc, stdo, stde) <-
readProcessEnvWithExitCode pgm ["-v"] en_locale_env
-- Split the output by lines to make certain kinds
-- of processing easier.
parseCompilerInfo (lines stdo) (lines stde) exitc
......@@ -952,7 +999,8 @@ readElfSection _dflags section exe = do
prog = "readelf"
args = [Option "-p", Option section, FileOption "" exe]
--
r <- readProcessWithExitCode prog (filter notNull (map showOpt args)) ""
r <- readProcessEnvWithExitCode prog (filter notNull (map showOpt args))
en_locale_env
case r of
(ExitSuccess, out, _err) -> return (doFilter (lines out))
_ -> return Nothing
......
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