Make sure the cygwin build uses gcc-3 from the gcc-core package, other version won...

diff --git a/configure.in b/configure.in
index 6fffe45b4921e1fd03d28ac84d1942ea3336a320..e1374fefbea9acb609ef17729e38d05171e4e796 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -98,12 +98,25 @@ case "$host" in
                        if test "x$host" == "x$build"; then
                                AC_DEFINE(TARGET_WIN32,1,[Target OS is Win32])
                        fi
-                       CC="gcc -mno-cygwin -g"
-                       CXX="g++ -mno-cygwin -g"
+                       #
+                       # gcc-3/g++-3 are from the gcc-core/gcc-g++ cygwin packages.
+                       # Other gcc packages will not work:
+                       # - the gcc-4 packages no longer support -mno-cygwin
+                       # - the mingw-gcc packages produce executables which depends on a libgcc<...>
+                       # dll, which means we would have to distribute that file too.
+                       #
+                       if test "x$CC" != "x"; then
+                               AC_ERROR(Don't set CC. mono can only be compiled with gcc-3 from the 'gcc-core' package)
+                       fi
+                       CC="gcc-3.exe -mno-cygwin -g"
+                       CXX="g++-3.exe -mno-cygwin -g"
                        # So libgc configure gets -mno-cygwin
                        export CC
                        export CXX
                        CFLAGS_FOR_EGLIB="$CFLAGS_FOR_EGLIB -mno-cygwin"
+
+                       # Test C compiler
+                       AC_TRY_COMPILE([int main () { return 0; }], [], [AC_ERROR(C compiler gcc-3.exe doesn't seem to work. Make you sure have the 'gcc-core' and 'gcc-g++' cygwin packages installed.)])
                else
                        target_win32=yes
                        AC_DEFINE(TARGET_WIN32,1,[Target OS is Win32/MinGW])