AC_LANG_CASE(
dnl[C], AC_PROG_CC_WIN32 [CFLAGS="$CFLAGS $WIN32FLAGS],
dnl [C++], [CXXFLAGS="$CXXFLAGS $WIN32FLAGS],
dnl [Fortran 77], [FFLAGS="$FFLAGS $WIN32FLAGS],
[AC_FATAL([NIah? Never heard of] _AC_LANG)])
What problem do you have? It works fine for me.
/tmp % cat configure.ac nostromo Err 1
AC_INIT
AC_LANG_CASE(
dnl[C], AC_PROG_CC_WIN32 [CFLAGS="$CFLAGS $WIN32FLAGS],
dnl [C++], [CXXFLAGS="$CXXFLAGS $WIN32FLAGS],
dnl [Fortran 77], [FFLAGS="$FFLAGS $WIN32FLAGS],
[AC_FATAL([NIah? Never heard of] _AC_LANG)])
/tmp % ace nostromo 16:35
autoconf: warning: both `configure.ac' and `configure.in' are present.
autoconf: warning: proceeding with `configure.ac'.
configure.ac:6: error: NIah? Never heard of C
configure.ac:6: the top level