1############################################################# 2# when compiling on Win32 we have to add the option 3# -fnative-struct for gcc2 or 4# --mms-bitfields for gcc3 5# parts from glib configure.in 6 7dnl AC_GCC_MSNATIVE_STRUCT 8dnl test if gcc supports option for MSnative struct 9dnl 10AC_DEFUN(AC_GCC_MSNATIVE_STRUCT, 11[dnl 12dnl Add ms native struct gcc option to CFLAGS if available 13dnl 14dnl if test x"$glib_native_win32" = xyes; then 15 AC_CHECK_HEADERS(windows.h, 16 [ 17 if test x"$GCC" = xyes; then 18 msnative_struct='' 19 AC_MSG_CHECKING([how to get MSVC-compatible struct packing]) 20 if test -z "$ac_cv_prog_CC"; then 21 our_gcc="$CC" 22 else 23 our_gcc="$ac_cv_prog_CC" 24 fi 25 case `$our_gcc --version | sed -e 's,\..*,.,' -e q` in 26 2.) 27 if $our_gcc -v --help 2>/dev/null | grep fnative-struct >/dev/null; then 28 msnative_struct='-fnative-struct' 29 fi 30 ;; 31 *) 32 if $our_gcc -v --help 2>/dev/null | grep ms-bitfields >/dev/null; then 33 msnative_struct='-mms-bitfields' 34 fi 35 ;; 36 esac 37 if test x"$msnative_struct" = x ; then 38 AC_MSG_RESULT([no way]) 39 AC_MSG_WARN([produced libraries might be incompatible with MSVC-compiled code]) 40 else 41 CFLAGS="$CFLAGS $msnative_struct" 42 AC_MSG_RESULT([${msnative_struct}]) 43 fi 44 fi 45dnl fi 46 ]) 47]) 48 49