Remove all references to -mno-cygwin

We shouldn't need it, as we don't call cygwin's gcc, and it was causing
problems with the nightly builders passing it to GHC.

aclocal.m4

@@ -56,38 +56,6 @@ AC_DEFUN([FP_EVAL_STDERR],
 ])# FP_EVAL_STDERR
 
 
-# FP_CHECK_FLAG(FLAG, [ACTION-IF-SUPPORTED], [ACTION-IF-NOT-SUPPORTED])
-# ---------------------------------------------------------------------
-# Check to see whether the compiler for the current language supports a
-# particular option.
-#
-# Implementation note: When given an unkown option, GCC issues an warning on
-# stderr only, but returns an exit value of 0 nevertheless. Consequently we have
-# to check stderr *and* the exit value.
-#
-# Used by ghc.
-AC_DEFUN([FP_CHECK_FLAG],
-[AC_LANG_COMPILER_REQUIRE()dnl
-AC_LANG_CASE([C],          [fp_compiler="$CC"  m4_pushdef([fp_Flags], [CFLAGS])],
-             [C++],        [fp_compiler="$CXX" m4_pushdef([fp_Flags], [CXXFLAGS])],
-             [Fortran 77], [fp_compiler="$F77" m4_pushdef([fp_Flags], [FFLAGS])])
-m4_pushdef([fp_Cache], [fp_cv_[]fp_Flags[]AS_TR_SH([$1])])[]dnl
-AC_CACHE_CHECK([whether $fp_compiler accepts $1], [fp_Cache],
-[AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
-fp_save_flags="$fp_Flags"
-fp_Flags="$fp_Flags $1"
-fp_Cache=no
-if FP_EVAL_STDERR([$ac_compile conftest.$ac_ext]) >/dev/null; then
-  test -s conftest.err || fp_Cache=yes
-fi
-fp_Flags="$fp_save_flags"
-rm -f conftest.err conftest.$ac_ext])
-AS_IF([test $fp_Cache = yes], [$2], [$3])[]dnl
-m4_popdef([fp_Cache])[]dnl
-m4_popdef([fp_Flags])[]dnl
-])# FP_CHECK_FLAG
-
-
 # FP_PROG_CONTEXT_DIFF
 # --------------------
 # Figure out how to do context diffs. Sets the output variable ContextDiffCmd.

compiler/main/DynFlags.hs

@@ -1901,7 +1901,6 @@ machdepCCOpts _dflags
                sta = opt_Static
            in
                     ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
---                    , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
                       ],
                       [ "-fno-defer-pop",
                         "-fomit-frame-pointer",

configure.ac

@@ -917,10 +917,6 @@ AC_PROG_CPP
 dnl ** Without optimization some INLINE trickery fails for GHCi
 SRC_CC_OPTS="-O"
 
-dnl ** Try to add -mno-cygwin to the C compiler options
-FP_CHECK_FLAG([-mno-cygwin], [
-SRC_CC_OPTS="-mno-cygwin $SRC_CC_OPTS"
-CPPFLAGS="-mno-cygwin $CPPFLAGS"])
 AC_SUBST(SRC_CC_OPTS)
 
 dnl ** figure out how to do context diffs

distrib/configure-bin.ac

@@ -53,11 +53,6 @@ i[[3456]]86-*-cygwin*)
 	TargetPlatform=i386-unknown-cygwin32;;
 i[[3456]]86-*-mingw32*)
 	exeext='.exe'
-	# We assume you're using mingw32 via the gcc that comes
-	# with cygwin, and not the native port, so let's augment
-	# the gcc command-line used here with -mno-cygwin -mwin32
-	# to arrange for good things to happen.
-	CFLAGS="-mno-cygwin -mwin32 $CFLAGS"
 	TargetPlatform=i386-unknown-mingw32
 	;;
 i[[3456]]86-apple-darwin*)

driver/ghci/ghci.c

@@ -18,7 +18,7 @@
  * To compile:
  *
  *   MSVC:    cl /o ghci.exe /c ghciwrap.c
- *   mingw:   gcc -mno-cygwin -o ghci.exe ghciwrap.c
+ *   mingw:   gcc -o ghci.exe ghciwrap.c
  *
  * If you want to associate your own icon with the wrapper,
  * here's how to do it:
@@ -35,7 +35,7 @@
  *   * Add the resulting .res file to the link line of the wrapper:
  *
  *     MSVC:    cl /o ghci.exe /c ghciwrap.c ghci.res
- *     mingw:   gcc -mno-cygwin -o ghci.exe ghciwrap.c ghci.res
+ *     mingw:   gcc -o ghci.exe ghciwrap.c ghci.res
  *
  */
 

mk/bootstrap.mk

@@ -39,10 +39,6 @@ PLATFORM_CC_OPTS += -static
 PLATFORM_HC_BOOT_CC_OPTS += -finhibit-size-directive
 endif
 
-ifeq "$(mingw32_TARGET_OS)" "1"
-PLATFORM_CC_OPTS += -mno-cygwin
-endif
-
 ifeq "$(alpha_TARGET_ARCH)" "1"
 PLATFORM_CC_OPTS += -static -w
 PLATFORM_HC_BOOT_CC_OPTS += -mieee

mk/config.mk.in

@@ -700,7 +700,7 @@ SRC_LINT_OPTS		+= -axz -DLINT $(SRC_CPP_OPTS)
 WAY$(_way)_LINT_OPTS	+= WAY$(_way)_CPP_OPTS
 
 # Default fptools options for dllwrap.
-SRC_BLD_DLL_OPTS += -mno-cygwin --target=i386-mingw32
+SRC_BLD_DLL_OPTS += --target=i386-mingw32
 
 # Flags for CPP when running GreenCard on .pgc files
 GC_CPP_OPTS += -P -E -x c -traditional -D__GLASGOW_HASKELL__

utils/lndir/Makefile

@@ -15,7 +15,3 @@ DESTDIR=$(INSTBINDIR)
 
 include $(TOP)/mk/target.mk
 
-# Win32: cygwin supports symlinks, so make sure we
-#        don't feed in the mingw flags here. In other
-#        words, lndir.exe is a cygwin-based app.
-CC_OPTS := $(filter-out -mno-cygwin,$(CC_OPTS))