[PATCH stable-2.15] Hide TH "Loading package" messages when compiling GHC <7.10

['Brian Foley' via ganeti-devel]

These are mostly noise and the number of messages makes it hard to see
what's being compiled. See https://ghc.haskell.org/trac/ghc/ticket/7863

NB The build process already requires bash and the bash-specific
set -o pipefile.

Signed-off-by: Brian Foley <bpfo...@google.com>
---
 Makefile.am | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index 8910b08..b0bf0aa 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1392,13 +1392,17 @@ $(HASKELL_PACKAGE_VERSIONS_FILE): Makefile ganeti.cabal 
\
 # are created in the `%.$(HTEST_SUFFIX)_o` rule.
 test/hs/%.o: $(HASKELL_PACKAGE_VERSIONS_FILE)
        @echo '[GHC|test]: $@ <- test/hs/$^'
-       @$(GHC) -c $(HFLAGS) -itest/hs $(HFLAGS_DYNAMIC) \
-               $(HEXTRA_COMBINED) $(@:%.o=%.hs)
+       @set -o pipefail ; \
+       $(GHC) -c $(HFLAGS) -itest/hs $(HFLAGS_DYNAMIC) \
+               $(HEXTRA_COMBINED) $(@:%.o=%.hs) | \
+               sed '/^Loading package /d'
 
 %.o: $(HASKELL_PACKAGE_VERSIONS_FILE)
        @echo '[GHC]: $@ <- $^'
-       @$(GHC) -c $(HFLAGS) $(HFLAGS_DYNAMIC) \
-               $(HEXTRA_COMBINED) $(@:%.o=%.hs)
+       @set -o pipefail ; \
+       $(GHC) -c $(HFLAGS) $(HFLAGS_DYNAMIC) \
+               $(HEXTRA_COMBINED) $(@:%.o=%.hs) | \
+               sed '/^Loading package /d'
 
 # For TH+profiling we need to compile twice: Once without profiling,
 # and then once with profiling. See
@@ -1406,10 +1410,12 @@ test/hs/%.o: $(HASKELL_PACKAGE_VERSIONS_FILE)
 if HPROFILE
 %.$(HPROF_SUFFIX)_o: %.o
        @echo '[GHC|prof]: $@ <- $^'
-       @$(GHC) -c $(HFLAGS) \
+       @set -o pipefail ; \
+       $(GHC) -c $(HFLAGS) \
          $(HPROFFLAGS) \
                $(HEXTRA_COMBINED) \
-               $(@:%.$(HPROF_SUFFIX)_o=%.hs)
+               $(@:%.$(HPROF_SUFFIX)_o=%.hs) | \
+               sed '/^Loading package /d'
 endif
 
 # We depend on the non-test .o file here because we need the corresponding .so
@@ -1418,8 +1424,10 @@ endif
 # rule).
 %.$(HTEST_SUFFIX)_o: %.o
        @echo '[GHC|test]: $@ <- $^'
-       @$(GHC) -c $(HTEST_FLAGS) \
-               $(HEXTRA_COMBINED) $(@:%.$(HTEST_SUFFIX)_o=%.hs)
+       @set -o pipefail ; \
+       $(GHC) -c $(HTEST_FLAGS) \
+               $(HEXTRA_COMBINED) $(@:%.$(HTEST_SUFFIX)_o=%.hs) | \
+               sed '/^Loading package /d'
 
 %.hi: %.o ;
 %.$(HTEST_SUFFIX)_hi: %.$(HTEST_SUFFIX)_o ;
-- 
1.9.1