community/ghc: fix testsuite on Alpine Linux

- Add `MAKEFLAGS= ` hack to work around failing `+PYTHON`
- Add "stat too good" results for Alpine x64
- Increase tolerancy for two "stat not good enough" tests
- Add a few more patches from mainline
- Require gnu grep to fix T13340 & T7014
- Skip T2615 and T10458 (unresolved linking issues)

Some tests should be investigated, particularly
- T9630 (+22% memory allocation)
- T10458: linking issue
- T2615: linker script issue
- T12600: broken pipe with grep .. | head -n 1 (replaced by grep -m 1)

Hopefully we can get rid of the MAKEFLAGS hack once Hadrian is used.

1 files changed, 95 insertions, 0 deletions

diff --git a/community/ghc/0001-testsuite-Ensure-that-ffi005-output-order-is-predict.patch b/community/ghc/0001-testsuite-Ensure-that-ffi005-output-order-is-predict.patch
new file mode 100644
index 0000000000..ba72fbaf51
--- /dev/null
+++ b/community/ghc/0001-testsuite-Ensure-that-ffi005-output-order-is-predict.patch
@@ -0,0 +1,95 @@
+From e647752e7b99c2fb198b652bc00c531cf31878cf Mon Sep 17 00:00:00 2001
+From: Ben Gamari <ben@smart-cactus.org>
+Date: Tue, 11 Jun 2019 13:09:55 -0400
+Subject: testsuite: Ensure that ffi005 output order is predictable
+
+The libc output buffer wasn't being flushed, making the order
+system-depedent.
+---
+ testsuite/tests/ffi/should_run/all.T         | 4 ++--
+ testsuite/tests/ffi/should_run/ffi005.hs     | 7 +++++--
+ testsuite/tests/ffi/should_run/ffi005.stdout | 4 ++--
+ testsuite/tests/ffi/should_run/ffi005_c.c    | 5 +++++
+ 4 files changed, 14 insertions(+), 6 deletions(-)
+ create mode 100644 testsuite/tests/ffi/should_run/ffi005_c.c
+
+diff --git a/testsuite/tests/ffi/should_run/all.T b/testsuite/tests/ffi/should_run/all.T
+index fa78c56b80..1a85e8ac66 100644
+--- a/testsuite/tests/ffi/should_run/all.T
++++ b/testsuite/tests/ffi/should_run/all.T
+@@ -28,11 +28,11 @@ test('ffi004', skip, compile_and_run, [''])
+ # On x86, the test suffers from floating-point differences due to the
+ # use of 80-bit internal precision when using the native code generator.
+ #
+-test('ffi005', [ omit_ways(prof_ways), 
++test('ffi005', [ omit_ways(prof_ways + ['ghci']),
+                  when(arch('i386'), skip),
+                  when(platform('i386-apple-darwin'), expect_broken(4105)),
+                  exit_code(3) ],
+-               compile_and_run, [''])
++               compile_and_run, ['ffi005_c.c'])
+ 
+ test('ffi006', normal, compile_and_run, [''])
+ 
+diff --git a/testsuite/tests/ffi/should_run/ffi005.hs b/testsuite/tests/ffi/should_run/ffi005.hs
+index 9c17441954..85437a422f 100644
+--- a/testsuite/tests/ffi/should_run/ffi005.hs
++++ b/testsuite/tests/ffi/should_run/ffi005.hs
+@@ -20,10 +20,12 @@ main = do
+ --  putStrLn $ "errno == " ++ show err
+ 
+   putStrLn "\nTesting puts (and withString)"
+-  withCString "Test successful" puts
++  hFlush stdout
++  withCString "Test puts successful" puts
++  flushStdout  -- Flush the libc output buffer
+ 
+   putStrLn "\nTesting peekArray0"
+-  s <- withCString "Test successful" (peekArray0 (castCharToCChar '\0'))
++  s <- withCString "Test peekArray0 successful" (peekArray0 (castCharToCChar '\0'))
+   putStr (map castCCharToChar s)
+ 
+ -- disabled due to use of non-portable constants in arguments to open:
+@@ -71,6 +73,7 @@ withBuffer sz m = do
+   return s
+ 
+ foreign import ccall puts :: CString -> IO CInt
++foreign import ccall "flush_stdout" flushStdout :: IO ()
+ 
+ -- foreign import ccall "open" open'  :: CString -> CInt -> IO CInt
+ -- foreign import ccall "open" open2' :: CString -> CInt -> CInt -> IO CInt
+diff --git a/testsuite/tests/ffi/should_run/ffi005.stdout b/testsuite/tests/ffi/should_run/ffi005.stdout
+index bc0a137514..bc29221ccf 100644
+--- a/testsuite/tests/ffi/should_run/ffi005.stdout
++++ b/testsuite/tests/ffi/should_run/ffi005.stdout
+@@ -3,9 +3,10 @@ Testing sin==mysin (should return lots of Trues)
+ [True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True]
+ 
+ Testing puts (and withString)
++Test puts successful
+ 
+ Testing peekArray0
+-Test successful
++Test peekArray0 successful
+ Testing sin==dynamic_sin (should return lots of Trues)
+ [True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True]
+ 
+@@ -16,4 +17,3 @@ Testing sin==Id wrapped_sin (should return lots of Trues)
+ [True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True,True]
+ 
+ Testing exit
+-Test successful
+diff --git a/testsuite/tests/ffi/should_run/ffi005_c.c b/testsuite/tests/ffi/should_run/ffi005_c.c
+new file mode 100644
+index 0000000000..e5a88e1b4e
+--- /dev/null
++++ b/testsuite/tests/ffi/should_run/ffi005_c.c
+@@ -0,0 +1,5 @@
++#include <stdio.h>
++void flush_stdout(void)
++{
++    fflush(stdout);
++}
+-- 
+2.17.1
+