diff options
Diffstat (limited to 'lib/replace/repdir.m4')
| -rw-r--r-- | lib/replace/repdir.m4 | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/lib/replace/repdir.m4 b/lib/replace/repdir.m4 new file mode 100644 index 0000000000..f53a4c2974 --- /dev/null +++ b/lib/replace/repdir.m4 @@ -0,0 +1,78 @@ +AC_CACHE_CHECK([for broken readdir],libreplace_cv_READDIR_NEEDED,[ + AC_TRY_RUN([ +#define test_readdir_os2_delete main +#include "$libreplacedir/test/os2_delete.c"], + [libreplace_cv_READDIR_NEEDED=no], + [libreplace_cv_READDIR_NEEDED=yes], + [libreplace_cv_READDIR_NEEDED="assuming not"]) +]) + +# +# try to replace with getdirentries() if needed +# +if test x"$libreplace_cv_READDIR_NEEDED" = x"yes"; then +AC_CHECK_FUNCS(getdirentries) +AC_VERIFY_C_PROTOTYPE([long telldir(const DIR *dir)], + [ + return 0; + ],[ + AC_DEFINE(TELLDIR_TAKES_CONST_DIR, 1, [Whether telldir takes a const pointer]) + ],[],[ + #include <dirent.h> + ]) + +AC_VERIFY_C_PROTOTYPE([int seekdir(DIR *dir, long ofs)], + [ + return 0; + ],[ + AC_DEFINE(SEEKDIR_RETURNS_INT, 1, [Whether seekdir returns an int]) + ],[],[ + #include <dirent.h> + ]) +AC_CACHE_CHECK([for replacing readdir using getdirentries()],libreplace_cv_READDIR_GETDIRENTRIES,[ + AC_TRY_RUN([ +#define _LIBREPLACE_REPLACE_H +#include "$libreplacedir/repdir_getdirentries.c" +#define test_readdir_os2_delete main +#include "$libreplacedir/test/os2_delete.c"], + [libreplace_cv_READDIR_GETDIRENTRIES=yes], + [libreplace_cv_READDIR_GETDIRENTRIES=no]) +]) +fi +if test x"$libreplace_cv_READDIR_GETDIRENTRIES" = x"yes"; then + AC_DEFINE(REPLACE_READDIR,1,[replace readdir]) + AC_DEFINE(REPLACE_READDIR_GETDIRENTRIES,1,[replace readdir using getdirentries()]) + LIBREPLACEOBJ="${LIBREPLACEOBJ} repdir_getdirentries.o" + libreplace_cv_READDIR_NEEDED=no +fi + +# +# try to replace with getdents() if needed +# +if test x"$libreplace_cv_READDIR_NEEDED" = x"yes"; then +AC_CHECK_FUNCS(getdents) +AC_CACHE_CHECK([for replacing readdir using getdents()],libreplace_cv_READDIR_GETDENTS,[ + AC_TRY_RUN([ +#define _LIBREPLACE_REPLACE_H +#error _donot_use_getdents_replacement_anymore +#include "$libreplacedir/repdir_getdents.c" +#define test_readdir_os2_delete main +#include "$libreplacedir/test/os2_delete.c"], + [libreplace_cv_READDIR_GETDENTS=yes], + [libreplace_cv_READDIR_GETDENTS=no]) +]) +fi +if test x"$libreplace_cv_READDIR_GETDENTS" = x"yes"; then + AC_DEFINE(REPLACE_READDIR,1,[replace readdir]) + AC_DEFINE(REPLACE_READDIR_GETDENTS,1,[replace readdir using getdents()]) + LIBREPLACEOBJ="${LIBREPLACEOBJ} repdir_getdents.o" + libreplace_cv_READDIR_NEEDED=no +fi + +AC_MSG_CHECKING([a usable readdir()]) +if test x"$libreplace_cv_READDIR_NEEDED" = x"yes"; then + AC_MSG_RESULT(no) + AC_MSG_WARN([the provided readdir() is broken]) +else + AC_MSG_RESULT(yes) +fi |