build: Add basic support for MinGW hosts.

This doesn't fully work yet (the FS code in libroot_build
needs to be adapted, as some of the symlink-related calls
are not available on MinGW), but it gets much further than
the "Cygwin" target did.

build/jam/BuildSetup

@@ -242,7 +242,7 @@ HOST_UNARFLAGS		?= x ;
 
 # check the host platform compatibility
 SetPlatformCompatibilityFlagVariables HOST_PLATFORM : HOST : host
-	: linux openbsd freebsd darwin ;
+	: linux openbsd freebsd darwin mingw ;
 HOST_PLATFORM_(host)_COMPATIBLE = 1 ;
 
 if $(HOST_PLATFORM) = linux || $(HOST_PLATFORM) = freebsd
@@ -670,6 +670,7 @@ switch $(HOST_PLATFORM) {
 	case linux		: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_LINUX ;
 	case freebsd	: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_FREEBSD ;
 	case darwin		: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_DARWIN ;
+	case mingw		: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_MINGW ;
 }
 
 # define host platform 64 bit macro

build/jam/MainBuildRules

@@ -685,9 +685,9 @@ rule BuildPlatformSharedLibrary
 	if $(HOST_PLATFORM) = darwin {
 		LINKFLAGS on $(target) = [ on $(target) return $(LINKFLAGS) ]
 			-dynamic -dynamiclib -Xlinker -flat_namespace ;
-#	} else if $(HOST_PLATFORM) = cygwin {
-#		LINKFLAGS on $(target) = [ on $(target) return $(LINKFLAGS) ]
-#			-shared -Xlinker --allow-multiple-definition ;
+	} else if $(HOST_PLATFORM) = mingw {
+		LINKFLAGS on $(target) = [ on $(target) return $(LINKFLAGS) ]
+			-shared -Xlinker --allow-multiple-definition ;
 	} else {
 		LINKFLAGS on $(target) = [ on $(target) return $(LINKFLAGS) ]
 			-shared -Xlinker -soname=\"$(target:G=)\" ;

build/jam/OverriddenJamRules

@@ -322,7 +322,7 @@ rule Cc
 
 actions Cc
 {
-	$(CC) $(CCFLAGS) -c "$(2)" $(CCDEFS) $(CCHDRS) -o "$(1)" ;
+	$(CC) $(CCFLAGS) -c "$(2)" $(CCDEFS) $(CCHDRS) -o "$(1)"
 }
 
 rule C++
@@ -399,13 +399,13 @@ rule C++
 
 actions C++
 {
-	$(C++) -c "$(2)" $(C++FLAGS) $(CCDEFS) $(CCHDRS) -o "$(1)" ;
+	$(C++) -c "$(2)" $(C++FLAGS) $(CCDEFS) $(CCHDRS) -o "$(1)"
 }
 
+# Force recreation of the archive to avoid build errors caused by
+# stale dependencies after renaming or deleting object files.
 actions together Archive
 {
-	# Force recreation of the archive to avoid build errors caused by
-	# stale dependencies after renaming or deleting object files.
 	$(RM) $(<)
 	$(AR) $(<) $(>)
 }

configure

@@ -782,6 +782,7 @@ case "${platform}" in
 	Haiku)	HOST_PLATFORM=haiku_host ;;
 	Linux)	HOST_PLATFORM=linux ;;
 	OpenBSD) HOST_PLATFORM=openbsd ;;
+	MINGW*) HOST_PLATFORM=mingw ;;
 	*)		echo Unsupported platform: ${platform}
 			exit 1 ;;
 esac

headers/build/BeOSBuildCompatibility.h

@@ -1,6 +1,21 @@
 #ifndef BEOS_BUILD_COMPATIBILITY_H
 #define BEOS_BUILD_COMPATIBILITY_H
 
+// These things have to be done before anything is included
+#if defined(HAIKU_HOST_PLATFORM_MINGW)
+#define _MODE_T_
+#define _POSIX_
+typedef int mode_t;
+
+#include <stdint.h>
+#include <limits.h>
+typedef uint32_t uid_t;
+typedef uint32_t gid_t;
+
+#include <io.h>
+#define mkdir(path, mode) mkdir(path)
+#endif
+
 // DEFFILEMODE is not available on MinGW and on platforms with MUSL
 #ifndef DEFFILEMODE
 #define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
@@ -25,9 +40,12 @@ typedef unsigned long	haiku_build_addr_t;
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <sys/uio.h>
 #include <unistd.h>
 
+#if !defined(HAIKU_HOST_PLATFORM_MINGW)
+#include <sys/uio.h>
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif

headers/build/host/mingw/endian.h

@@ -0,0 +1,15 @@
+#ifndef _HAIKU_BUILD_COMPATIBILITY_MINGW_ENDIAN
+#define _HAIKU_BUILD_COMPATIBILITY_MINGW_ENDIAN
+
+
+// There's no <endian.h> in MinGW.
+
+#include <sys/param.h>
+
+#define	__LITTLE_ENDIAN	LITTLE_ENDIAN
+#define	__BIG_ENDIAN	BIG_ENDIAN
+
+#define __BYTE_ORDER BYTE_ORDER
+
+
+#endif	// _HAIKU_BUILD_COMPATIBILITY_MINGW_ENDIAN

headers/build/host/sunos/endian.h

@@ -1,22 +0,0 @@
-#ifndef _HAIKU_BUILD_COMPATIBILITY_SUNOS_ENDIAN
-#define _HAIKU_BUILD_COMPATIBILITY_SUNOS_ENDIAN
-
-// There's no <endian.h> in Solaris.
-
-#include <sys/byteorder.h>
-
-#define	__LITTLE_ENDIAN	1234
-#define	__BIG_ENDIAN	4321
-#define __PDP_ENDIAN	3412
-
-#if defined(_LITTLE_ENDIAN)
-#define	BYTE_ORDER		__LITTLE_ENDIAN
-#elif defined(_BIG_ENDIAN)
-#define	BYTE_ORDER		__BIG_ENDIAN
-#else
-#error Unable to determine byte order!
-#endif
-
-#define __BYTE_ORDER	BYTE_ORDER
-
-#endif	// _HAIKU_BUILD_COMPATIBILITY_SUNOS_ENDIAN

src/build/libroot/errors.cpp

@@ -49,7 +49,9 @@ init_error_map()
 	ADD_ERROR(ERANGE);
 	ADD_ERROR(EPROTOTYPE);
 	ADD_ERROR(EPROTONOSUPPORT);
-	ADD_ERROR(EPFNOSUPPORT);
+	#ifdef EPFNOSUPPORT
+		ADD_ERROR(EPFNOSUPPORT);
+	#endif
 	ADD_ERROR(EAFNOSUPPORT);
 	ADD_ERROR(EADDRINUSE);
 	ADD_ERROR(EADDRNOTAVAIL);
@@ -60,7 +62,9 @@ init_error_map()
 	ADD_ERROR(ECONNRESET);
 	ADD_ERROR(EISCONN);
 	ADD_ERROR(ENOTCONN);
-	ADD_ERROR(ESHUTDOWN);
+	#ifdef ESHUTDOWN
+		ADD_ERROR(ESHUTDOWN);
+	#endif
 	ADD_ERROR(ECONNREFUSED);
 	ADD_ERROR(EHOSTUNREACH);
 	ADD_ERROR(ENOPROTOOPT);
@@ -68,25 +72,41 @@ init_error_map()
 	ADD_ERROR(EINPROGRESS);
 	ADD_ERROR(EALREADY);
 	ADD_ERROR(EILSEQ);
-	ADD_ERROR(ENOMSG);
-	ADD_ERROR(ESTALE);
+	#ifdef ENOMSG
+		ADD_ERROR(ENOMSG);
+	#endif
+	#ifdef ESTALE
+		ADD_ERROR(ESTALE);
+	#endif
 	ADD_ERROR(EOVERFLOW);
 	ADD_ERROR(EMSGSIZE);
 	ADD_ERROR(EOPNOTSUPP);
 	ADD_ERROR(ENOTSOCK);
-	ADD_ERROR(EHOSTDOWN);
-	ADD_ERROR(EBADMSG);
+	#ifdef EHOSTDOWN
+		ADD_ERROR(EHOSTDOWN);
+	#endif
+	#ifdef EBADMSG
+		ADD_ERROR(EBADMSG);
+	#endif
 	#ifdef ECANCELED
 		ADD_ERROR(ECANCELED);
 	#endif
 	ADD_ERROR(EDESTADDRREQ);
-	ADD_ERROR(EDQUOT);
-	ADD_ERROR(EIDRM);
-	ADD_ERROR(EMULTIHOP);
+	#ifdef EDQUOT
+		ADD_ERROR(EDQUOT);
+	#endif
+	#ifdef EIDRM
+		ADD_ERROR(EIDRM);
+	#endif
+	#ifdef EMULTIHOP
+		ADD_ERROR(EMULTIHOP);
+	#endif
 	#ifdef ENODATA
 		ADD_ERROR(ENODATA);
 	#endif
-	ADD_ERROR(ENOLINK);
+	#ifdef ENOLINK
+		ADD_ERROR(ENOLINK);
+	#endif
 	#ifdef ENOSR
 		ADD_ERROR(ENOSR);
 	#endif
@@ -98,7 +118,9 @@ init_error_map()
 	#ifdef ETIME
 		ADD_ERROR(ETIME);
 	#endif
-	ADD_ERROR(ETXTBSY);
+	#ifdef ETXTBSY
+		ADD_ERROR(ETXTBSY);
+	#endif
 	ADD_ERROR(ENOMEM);
 	ADD_ERROR(EACCES);
 	ADD_ERROR(EINTR);

src/build/libsolv/Jamfile

@@ -33,6 +33,8 @@ switch $(HOST_PLATFORM) {
 		DEFINES += HAVE_STRCHRNUL HAVE_FUNOPEN ;
 	case darwin :
 		DEFINES += HAVE_FUNOPEN HAVE_QSORT_R ;
+	case mingw :
+		DEFINES += ;
 	case * :
 		Exit $(SUBDIR)/Jamfile: "Please add a case for your platform"
 			"($(HOST_PLATFORM))!" ;