[commit: ghc] ghc-7.8: testsuite: disable gcc's warnings about casts of incompatible prototypes in UNREG (60d88fa)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : ghc-7.8
Link       : http://ghc.haskell.org/trac/ghc/changeset/60d88fabac11c4e2572692dc73d6842647cb59a7/ghc

>---------------------------------------------------------------

commit 60d88fabac11c4e2572692dc73d6842647cb59a7
Author: Sergei Trofimovich <slyfox at gentoo.org>
Date:   Sat Aug 23 11:01:16 2014 +0300

    testsuite: disable gcc's warnings about casts of incompatible prototypes in UNREG
    
    Haskell's 'foreign import' declaraion does not have a way
    to extress exact C prototypes (it ignores 'const' modifiers, exact pointer
    types, etc.) which leads to warnings when C backend generates calls to such
    functions:
    
        /tmp/ghc32698_0/ghc32698_10.hc:52:5:
             warning: conflicting types for built-in function ‘strlen’ [enabled by default]
             EF_(strlen);
                 ^
    
    Patch disables builtin functions for UNREG build
    to workaround test failures due to stderr mismatch.
    
    Fixes the following test failures:
        TEST="safePkg01 T5423 T7574 T3736"
    
    Signed-off-by: Sergei Trofimovich <slyfox at gentoo.org>
    (cherry picked from commit fcdd58d2ddcfd8d420adbcb3f20c1d666bc834e6)


>---------------------------------------------------------------

60d88fabac11c4e2572692dc73d6842647cb59a7
 testsuite/mk/test.mk | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/testsuite/mk/test.mk b/testsuite/mk/test.mk
index 0cc3f21..ab059bf 100644
--- a/testsuite/mk/test.mk
+++ b/testsuite/mk/test.mk
@@ -25,6 +25,13 @@ COMPILER     = ghc
 CONFIGDIR    = $(TOP)/config
 CONFIG       = $(CONFIGDIR)/$(COMPILER)
 
+ifeq "$(GhcUnregisterised)" "YES"
+    # Otherwise C backend generates many warnings about
+    # imcompatible proto casts for GCC's buitins:
+    #    memcpy, printf, strlen.
+    EXTRA_HC_OPTS += -optc-fno-builtin
+endif
+
 # TEST_HC_OPTS is passed to every invocation of TEST_HC 
 # in nested Makefiles
 TEST_HC_OPTS = -fforce-recomp -dcore-lint -dcmm-lint -dno-debug-output -no-user-$(GhcPackageDbFlag) -rtsopts $(EXTRA_HC_OPTS)