support for cross building Qt for MinGW (win32-g++) on Unix

This changeset provides the basis for targetting win32-g++ on Unix using
the configure shell script:
   support added to the configure script itself
   support added to relevant config.tests
   support added to mingw makefile generator in qmake
   new makespec: unsupported/win32-g++-cross
The makespec is based on the win32-g++ makespec.

Merge-request: 2407
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

7 files changed, 24 insertions, 5 deletions

diff --git a/config.tests/unix/compile.test b/config.tests/unix/compile.test
index 67a4636..99ebfd2 100755
--- a/config.tests/unix/compile.test
+++ b/config.tests/unix/compile.test
@@ -65,8 +65,10 @@ test -d "$OUTDIR/$TEST" || mkdir -p "$OUTDIR/$TEST"
 cd "$OUTDIR/$TEST"
 
 test -r Makefile && $MAKE distclean >/dev/null 2>&1
+# Make sure output from possible previous tests is gone
+rm -f "$EXE" "${EXE}.exe"
 
-"$OUTDIR/bin/qmake" -nocache -spec "$QMKSPEC" "CONFIG+=$QMAKE_CONFIG" "LIBS*=$LFLAGS" "LIBS+=$MAC_ARCH_LFLAGS" "INCLUDEPATH*=$INCLUDEPATH" "QMAKE_CXXFLAGS*=$CXXFLAGS" "QMAKE_CXXFLAGS+=$MAC_ARCH_CXXFLAGS" "$SRCDIR/$TEST/$EXE.pro" -o "$OUTDIR/$TEST/Makefile"
+"$OUTDIR/bin/qmake" -nocache -spec "$QMKSPEC" "CONFIG+=$QMAKE_CONFIG" "CONFIG-=debug_and_release" "LIBS*=$LFLAGS" "LIBS+=$MAC_ARCH_LFLAGS" "INCLUDEPATH*=$INCLUDEPATH" "QMAKE_CXXFLAGS*=$CXXFLAGS" "QMAKE_CXXFLAGS+=$MAC_ARCH_CXXFLAGS" "$SRCDIR/$TEST/$EXE.pro" -o "$OUTDIR/$TEST/Makefile"
 
 if [ "$VERBOSE" = "yes" ]; then
     $MAKE
@@ -74,7 +76,7 @@ else
     $MAKE >/dev/null 2>&1
 fi
 
-[ -x "$EXE" ] && SUCCESS=yes
+( [ -x "$EXE" ] || [ -x "${EXE}.exe" ] ) && SUCCESS=yes
 
 # done
 if [ "$SUCCESS" != "yes" ]; then
diff --git a/config.tests/unix/getaddrinfo/getaddrinfotest.cpp b/config.tests/unix/getaddrinfo/getaddrinfotest.cpp
index 0c482cc..df6ae10 100644
--- a/config.tests/unix/getaddrinfo/getaddrinfotest.cpp
+++ b/config.tests/unix/getaddrinfo/getaddrinfotest.cpp
@@ -42,9 +42,16 @@
 /* Sample program for configure to test for getaddrinfo on the unix
      platform. we check for all structures and functions required. */
 
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef __MINGW32__
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#else
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netdb.h>
+#endif
 
 int main()
 {
diff --git a/config.tests/unix/iconv/iconv.pro b/config.tests/unix/iconv/iconv.pro
index 8cdc776..d642da2 100644
--- a/config.tests/unix/iconv/iconv.pro
+++ b/config.tests/unix/iconv/iconv.pro
@@ -1,3 +1,3 @@
 SOURCES = iconv.cpp
 CONFIG -= qt dylib app_bundle
-mac:LIBS += -liconv
+mac|win32-g++*:LIBS += -liconv
diff --git a/config.tests/unix/ipv6/ipv6test.cpp b/config.tests/unix/ipv6/ipv6test.cpp
index 4fb27f2..4243f2d 100644
--- a/config.tests/unix/ipv6/ipv6test.cpp
+++ b/config.tests/unix/ipv6/ipv6test.cpp
@@ -46,9 +46,14 @@ platforms. We check for the required IPv6 data structures. */
 #define _HPUX_SOURCE
 #endif
 
+#ifdef __MINGW32__
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#else
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
+#endif
 
 int main()
 {
diff --git a/config.tests/unix/odbc/odbc.cpp b/config.tests/unix/odbc/odbc.cpp
index 32602c0..98f3571 100644
--- a/config.tests/unix/odbc/odbc.cpp
+++ b/config.tests/unix/odbc/odbc.cpp
@@ -39,6 +39,9 @@
 **
 ****************************************************************************/
 
+#ifdef __MINGW32__
+#include <windows.h>
+#endif
 #include <sql.h>
 #include <sqlext.h>
 
diff --git a/config.tests/unix/odbc/odbc.pro b/config.tests/unix/odbc/odbc.pro
index c588ede..06a548f 100644
--- a/config.tests/unix/odbc/odbc.pro
+++ b/config.tests/unix/odbc/odbc.pro
@@ -1,4 +1,5 @@
 SOURCES = odbc.cpp
 CONFIG -= qt dylib
 mac:CONFIG -= app_bundle
-LIBS += -lodbc
+win32-g++*:LIBS += -lodbc32
+else:LIBS += -lodbc
diff --git a/config.tests/x11/opengl/opengl.pro b/config.tests/x11/opengl/opengl.pro
index 432bd8d..5fd41d3 100644
--- a/config.tests/x11/opengl/opengl.pro
+++ b/config.tests/x11/opengl/opengl.pro
@@ -7,4 +7,5 @@ for(p, QMAKE_LIBDIR_OPENGL) {
 }
 
 CONFIG -= qt
-LIBS += -lGL -lGLU
+win32-g++*:LIBS += -lopengl32
+else:LIBS += -lGL -lGLU