diff options
Diffstat (limited to 'm4/ax_check_funcs_comp.m4')
| -rw-r--r-- | m4/ax_check_funcs_comp.m4 | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/m4/ax_check_funcs_comp.m4 b/m4/ax_check_funcs_comp.m4 new file mode 100644 index 000000000000..d8b3cc243c49 --- /dev/null +++ b/m4/ax_check_funcs_comp.m4 @@ -0,0 +1,32 @@ +dnl Like AC_CHECK_FUNCS, but allows the function definition to be +dnl a macro. This allows for detection of functions which are renamed +dnl with macros to something other than the name we are testing with. +AC_DEFUN([AX_CHECK_FUNCS_COMP],[ + dnl This is magic to make autoheader pick up the config.h.in templates + dnl automatically. This uses macros which are probably not public + dnl (not documented anyway) but this works at least with Automake 2.59. + AC_FOREACH([AX_Func], [$1], + [AH_TEMPLATE(AS_TR_CPP(HAVE_[]AX_Func), + [Define to 1 if you have the `]AX_Func[' function or macro.])])dnl + for ax_func in $1; do + ax_fname=`echo $ax_func | sed "s/@<:@^a-zA-Z0-9_@:>@/_/g"` + ax_symbolname=`echo $ax_func | sed "s/@<:@^a-zA-Z0-9_@:>@/_/g" | tr "@<:@a-z@:>@" "@<:@A-Z@:>@"` + AC_CACHE_CHECK([for $ax_func], ax_cv_func_${ax_fname}, [ + AC_LINK_IFELSE( + [ AC_LANG_PROGRAM( + [$4 +void *foo = $ax_func; +], + [ return foo != $ax_func; ])], + [ eval "ax_cv_func_${ax_fname}=\"yes\"" ], + [ eval "ax_cv_func_${ax_fname}=\"no\"" ])]) + if eval "test \"\${ax_cv_func_${ax_fname}}\" = \"yes\""; then + AC_DEFINE_UNQUOTED(HAVE_${ax_symbolname}, 1, + [Define to 1 if you have the $ax_func() function.]) + $2 + else + true + $3 + fi + done +])dnl |