1 glibc-2.28 did hide loff_t indef system-specific macros:
2 https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=663e7d784977f6b15c0cab73f754f9f39c9c0c2c
4 This caused build failure:
5 ../include/reiserfs_lib.h:300:55: error: unknown type name 'loff_t'; did you mean 'off_t'?
7 Re-enable extensions to pull loff_t back.
9 https://bugs.gentoo.org/663930
12 @@ -23,2 +23,4 @@ AC_PROG_MAKE_SET
14 +dnl pull in loff_t from glibc
15 +AC_USE_SYSTEM_EXTENSIONS