Avoid depending on regex-tdfa on mips, mipsel, and s390, where it fails to build.

Limit.hs

@@ -13,8 +13,12 @@ import Data.Time.Clock.POSIX
 import qualified Data.Set as S
 import qualified Data.Map as M
 import System.Path.WildMatch
+#ifdef WITH_TDFA
 import Text.Regex.TDFA
 import Text.Regex.TDFA.String
+#else
+import System.Path.WildMatch
+#endif
 
 import Common.Annex
 import qualified Annex
@@ -85,10 +89,11 @@ limitExclude :: MkLimit
 limitExclude glob = Right $ const $ return . not . matchglob glob
 
 {- Could just use wildCheckCase, but this way the regex is only compiled
- - once. Also, we use regex-TDFA because it's less buggy in its support
- - of non-unicode characters. -}
+ - once. Also, we use regex-TDFA when available, because it's less buggy
+ - in its support of non-unicode characters. -}
 matchglob :: String -> Annex.FileInfo -> Bool
 matchglob glob fi =
+#ifdef WITH_TDFA
 	case cregex of
 		Right r -> case execute r (Annex.matchFile fi) of
 			Right (Just _) -> True
@@ -97,6 +102,9 @@ matchglob glob fi =
   where
 	cregex = compile defaultCompOpt defaultExecOpt regex
 	regex = '^':wildToRegex glob
+#else
+	wildCheckCase glob (Annex.matchFile fi)
+#endif
 
 {- Adds a limit to skip files not believed to be present
  - in a specfied repository. -}

debian/changelog

@@ -7,6 +7,8 @@ git-annex (4.20130502) UNRELEASED; urgency=low
   * Disable building with the haskell threaded runtime when the assistant
     is not built. This may fix builds on s390x and sparc, which are failing
     to link -lHSrts_thr
+  * Avoid depending on regex-tdfa on mips, mipsel, and s390, where it fails
+    to build.
 
  -- Joey Hess <joeyh@debian.org>  Thu, 02 May 2013 20:39:19 -0400
 

debian/control

@@ -9,7 +9,7 @@ Build-Depends:
 	libghc-hslogger-dev,
 	libghc-pcre-light-dev,
 	libghc-sha-dev,
-	libghc-regex-tdfa-dev,
+	libghc-regex-tdfa-dev [!mips !mipsel !s390],
 	libghc-dataenc-dev,
 	libghc-utf8-string-dev,
 	libghc-hs3-dev (>= 0.5.6),

git-annex.cabal

@@ -62,6 +62,9 @@ Flag Android
 Flag TestSuite
   Description: Embed the test suite into git-annex
 
+Flag TDFA
+  Description: Use regex-tdfa for wildcards
+
 Executable git-annex
   Main-Is: git-annex.hs
   Build-Depends: MissingH, hslogger, directory, filepath,
@@ -70,7 +73,7 @@ Executable git-annex
    extensible-exceptions, dataenc, SHA, process, json,
    base (>= 4.5 && < 4.8), monad-control, transformers-base, lifted-base,
    IfElse, text, QuickCheck >= 2.1, bloomfilter, edit-distance, process,
-   SafeSemaphore, uuid, random, regex-tdfa, dlist
+   SafeSemaphore, uuid, random, dlist
   -- Need to list these because they're generated from .hsc files.
   Other-Modules: Utility.Touch Utility.Mounts
   Include-Dirs: Utility
@@ -87,6 +90,10 @@ Executable git-annex
     Build-Depends: HUnit
     CPP-Options: -DWITH_TESTSUITE
 
+  if flag(TDFA)
+    Build-Depends: regex-tdfa
+    CPP-Options: -DWITH_TDFA
+
   if flag(S3)
     Build-Depends: hS3
     CPP-Options: -DWITH_S3