Mercurial > hg > octave-kai > gnulib-hg
changeset 1075:54893e13ca01
.
| author | Jim Meyering <jim@meyering.net> |
|---|---|
| date | Sun, 26 Oct 1997 03:52:27 +0000 |
| parents | e41c2c187966 |
| children | 4e68c3fdb9ec |
| files | m4/malloc.m4 |
| diffstat | 1 files changed, 33 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
new file mode 100644 --- /dev/null +++ b/m4/malloc.m4 @@ -0,0 +1,33 @@ +#serial 1 + +dnl From Jim Meyering. +dnl Determine whether malloc accepts 0 as its argument. +dnl If it doesn't, arrange to use the replacement function. +dnl +dnl If you use this macro in a package, you should +dnl add the following two lines to acconfig.h: +dnl /* Define to rpl_malloc if the replacement function should be used. */ +dnl #undef malloc +dnl + +AC_DEFUN(jm_FUNC_MALLOC, +[ + AC_CACHE_CHECK([for working malloc], jm_cv_func_working_malloc, + [AC_TRY_RUN([ + char *malloc (); + int + main () + { + exit (malloc (0) ? 0 : 1); + } + ], + jm_cv_func_working_malloc=yes, + jm_cv_func_working_malloc=no, + dnl When crosscompiling, assume malloc is broken. + jm_cv_func_working_malloc=no) + ]) + if test $jm_cv_func_working_malloc = no; then + LIBOBJS="$LIBOBJS malloc.o" + AC_DEFINE_UNQUOTED(malloc, rpl_malloc) + fi +])