Enable shared libs on OpenBSD

compiler/HsVersions.h

@@ -17,7 +17,7 @@ you will screw up the layout where they are used in case expressions!
 #include "ghc_boot_platform.h"
 
 /* This macro indicates that the target OS supports ELF-like shared libraries */
-#if linux_TARGET_OS || freebsd_TARGET_OS
+#if linux_TARGET_OS || freebsd_TARGET_OS || openbsd_TARGET_OS
 #define elf_OBJ_FORMAT 1
 #endif
 

compiler/main/DriverPipeline.hs

@@ -1538,7 +1538,7 @@ linkBinary dflags o_files dep_packages = do
 
     let
         thread_opts | WayThreaded `elem` ways = [
-#if !defined(mingw32_TARGET_OS) && !defined(freebsd_TARGET_OS) && !defined(haiku_TARGET_OS)
+#if !defined(mingw32_TARGET_OS) && !defined(freebsd_TARGET_OS) && !defined(openbsd_TARGET_OS) && !defined(haiku_TARGET_OS)
                         "-lpthread"
 #endif
 #if defined(osf3_TARGET_OS)

compiler/main/StaticFlags.hs

@@ -413,6 +413,9 @@ way_details =
 	-- the problems are our fault or theirs, but it seems that using the
 	-- alternative 1:1 threading library libthr works around it:
 	  "-optl-lthr"
+#elif defined(openbsd_TARGET_OS)
+	  "-optc-pthread"
+	, "-optl-pthread"
 #elif defined(solaris2_TARGET_OS)
           "-optl-lrt"
 #endif
@@ -428,6 +431,10 @@ way_details =
 	--	with -fPIC. Labels not in the current package are assumed to be in a DLL 
 	--	different from the current one.
 	, "-fPIC"
+#elif defined(openbsd_TARGET_OS)
+	-- Without this, linking the shared libHSffi fails because
+	-- it uses pthread mutexes.
+	, "-optl-pthread"
 #endif
 	],
 

compiler/nativeGen/Platform.hs

@@ -49,6 +49,7 @@ data OS
 	| OSSolaris
 	| OSMinGW32
 	| OSFreeBSD
+	| OSOpenBSD
 	deriving (Show, Eq)
 
 
@@ -56,6 +57,7 @@ data OS
 osElfTarget :: OS -> Bool
 osElfTarget OSLinux   = True
 osElfTarget OSFreeBSD = True
+osElfTarget OSOpenBSD = True
 osElfTarget _         = False
 
 -- | This is the target platform as far as the #ifdefs are concerned.
@@ -96,6 +98,8 @@ defaultTargetOS	= OSSolaris
 defaultTargetOS	= OSMinGW32
 #elif freebsd_TARGET_OS
 defaultTargetOS	= OSFreeBSD
+#elif openbsd_TARGET_OS
+defaultTargetOS	= OSOpenBSD
 #else
 defaultTargetOS	= OSUnknown
 #endif

libffi/ghc.mk

@@ -75,6 +75,8 @@ libffi_DYNAMIC_PROG =
 ifeq "$(darwin_TARGET_OS)" "1"
 libffi_DYNAMIC_LIBS = libffi/dist-install/build/libffi$(soext) \
                       libffi/dist-install/build/libffi.5$(soext)
+else ifeq "$(openbsd_TARGET_OS)" "1"
+libffi_DYNAMIC_LIBS = libffi/dist-install/build/libffi.so.5.10
 else
 libffi_DYNAMIC_LIBS = libffi/dist-install/build/libffi.so \
                       libffi/dist-install/build/libffi.so.5

mk/config.mk.in

@@ -104,7 +104,12 @@ GhcDynamic=NO
 GhcProfiled=NO
 
 # Do we support shared libs?
-PlatformSupportsSharedLibs = $(if $(filter $(TARGETPLATFORM),i386-unknown-linux x86_64-unknown-linux i386-unknown-freebsd x86_64-unknown-freebsd i386-unknown-mingw32 i386-apple-darwin powerpc-apple-darwin),YES,NO)
+PlatformSupportsSharedLibs = $(if $(filter $(TARGETPLATFORM),\
+	i386-unknown-linux x86_64-unknown-linux \
+	i386-unknown-freebsd x86_64-unknown-freebsd \
+	i386-unknown-openbsd x86_64-unknown-openbsd \
+	i386-unknown-mingw32 \
+	i386-apple-darwin powerpc-apple-darwin),YES,NO)
 
 # Build a compiler that will build *unregisterised* libraries and
 # binaries by default.  Unregisterised code is supposed to compile and