+dnl Usage: LYX_FUNC_PUTENV_ARGTYPE
+dnl Checks whether putenv() takes 'char const *' or 'char *' as
+dnl argument. This is needed because Solaris 7 (wrongly?) uses 'char *',
+dnl while everybody else uses the former...
+AC_DEFUN(LYX_FUNC_PUTENV_ARGTYPE,
+[AC_MSG_CHECKING([type of argument for putenv()])
+ AC_CACHE_VAL(lyx_cv_func_putenv_arg,dnl
+ [AC_TRY_COMPILE(dnl
+[#include <cstdlib>
+extern int putenv(const char *);],,dnl
+ [lyx_cv_func_putenv_arg='char const *'],[lyx_cv_func_putenv_arg='char *'])])
+ AC_MSG_RESULT($lyx_cv_func_putenv_arg)
+ AC_DEFINE_UNQUOTED(PUTENV_TYPE_ARG,$lyx_cv_func_putenv_arg,dnl
+ [Define to the type of the argument of putenv(). Needed on Solaris 7.])])
+