Check for the msi* build requirements in configure.in + update README.cross.

Change-Id: I0da3e604ebd0665c5405174957d852677195126b

README.cross

@@ -93,6 +93,16 @@ zypper in mingw32-cross-gcc mingw32-cross-gcc-c++ mingw32-python-devel \
     mingw32-libcppunit-devel mingw32-libredland mingw32-libredland-devel \
     mingw32-libmythes mingw32-libmythes-devel
 
+You also need wine, ideally:
+
+zypper ar http://download.opensuse.org/repositories/Emulators:/Wine/<your_os>/Emulators:Wine.repo
+
+zypper in wine wine-devel wine-devel-32bit
+
+And in order to be able to use 'winegcc -m32', also
+
+zypper in glibc-devel-32bit gcc-32bit
+
 There might be more that are missing, please read carefully what autogen.sh
 tells you, and either remove one of the --with-system-*, or install the
 missing dependency.

configure.in

@@ -74,8 +74,6 @@ else
 fi
 AC_SUBST(CROSS_COMPILING)
 
-AC_PATH_PROG(WINEGCC, winegcc)
-
 AC_PROG_EGREP
 # AC_PROG_EGREP doesn't set GREP on all systems as well
 AC_PATH_PROG(GREP, grep)
@@ -2366,6 +2364,24 @@ if test "$_os" != "WINNT" -o "$WITH_MINGW" = "yes"; then
     AC_PROG_CC
 fi
 
+dnl We need winegcc when building MinGW build to be able to cross-build msi tools
+AC_PATH_PROG(WINEGCC, winegcc)
+if test "$WITH_MINGW" = "yes" ; then
+    if test "$WINEGCC" = ""; then
+        AC_MSG_ERROR([winegcc was not found, please install wine-devel, or wine-devel-32bit])
+    fi
+    CC_save="$CC"
+    CC="$WINEGCC -m32"
+    AC_LINK_IFELSE([AC_LANG_PROGRAM([
+#include <stdio.h>
+        ],[
+printf ("hello world\n");
+        ])],,
+        [AC_MSG_ERROR([winegcc cannot build 32bit binaries, please install glibc-devel-32bit and gcc-32bit])]
+    )
+    CC="$CC_save"
+fi
+
 COMPATH=`dirname "$CC"`
 if test "$COMPATH" = "."; then
     AC_PATH_PROGS(COMPATH, $CC)

setup_native/source/win32/wintools/makecab/makefile.mk

@@ -27,7 +27,7 @@ TARGET=sn_makecab
 $(BIN)/makecab.exe.so: $(BIN)/makecab.exe
 
 $(BIN)/makecab.exe:
-	$(WINEGCC) -o $(BIN)/makecab.exe makecab.c parseddf.c -mconsole -lmsi 
+	$(WINEGCC) -o $(BIN)/makecab.exe makecab.c parseddf.c -m32 -mconsole -lmsi
 
 # --- Targets --------------------------------------------------------------
 

setup_native/source/win32/wintools/msidb/makefile.mk

@@ -27,7 +27,7 @@ TARGET=sn_msidb
 $(BIN)/msidb.exe.so: $(BIN)/msidb.exe
 
 $(BIN)/msidb.exe:
-	$(WINEGCC) -o $(BIN)/msidb.exe msidb.c -municode -lmsi 
+	$(WINEGCC) -o $(BIN)/msidb.exe msidb.c -m32 -municode -lmsi
 
 # --- Targets --------------------------------------------------------------
 

setup_native/source/win32/wintools/msiinfo/makefile.mk

@@ -27,7 +27,7 @@ TARGET=sn_msiinfo
 $(BIN)/msiinfo.exe.so: $(BIN)/msiinfo.exe
 
 $(BIN)/msiinfo.exe:
-	$(WINEGCC) -o $(BIN)/msiinfo.exe msiinfo.c -mconsole -municode -lmsi 
+	$(WINEGCC) -o $(BIN)/msiinfo.exe msiinfo.c -m32 -mconsole -municode -lmsi
 
 # --- Targets --------------------------------------------------------------
 

setup_native/source/win32/wintools/msimsp/makefile.mk

@@ -27,7 +27,7 @@ TARGET=sn_msimsp
 $(BIN)/msimsp.exe.so: $(BIN)/msimsp.exe
 
 $(BIN)/msimsp.exe:
-	$(WINEGCC) -o $(BIN)/msimsp.exe msimsp.c -mconsole -lmsi 
+	$(WINEGCC) -o $(BIN)/msimsp.exe msimsp.c -m32 -mconsole -lmsi
 
 # --- Targets --------------------------------------------------------------
 

setup_native/source/win32/wintools/msitran/makefile.mk

@@ -27,7 +27,7 @@ TARGET=sn_msitran
 $(BIN)/msitran.exe.so: $(BIN)/msitran.exe
 
 $(BIN)/msitran.exe:
-	$(WINEGCC) -o $(BIN)/msitran.exe msitran.c -mconsole -lmsi 
+	$(WINEGCC) -o $(BIN)/msitran.exe msitran.c -m32 -mconsole -lmsi
 
 # --- Targets --------------------------------------------------------------