Commit 2a3d521318533bb1d0535b989be578b4f5c5ff1a
2024-03-14T01:56:36
build: Do not rely on internal autoconf ac_cv_sys_file_offset_bits variable This is an internal implementation detail from AC_SYS_LARGEFILE, which happened to change with autoconf 2.72. Instead compute our own size for off_t. Closes: #28
diff --git a/m4/libbsd-large.m4 b/m4/libbsd-large.m4
index dc00c6e..213f2cb 100644
--- a/m4/libbsd-large.m4
+++ b/m4/libbsd-large.m4
@@ -43,7 +43,17 @@ AC_DEFUN([LIBBSD_SYS_TIME64], [
])
LIBBSD_SELECT_ABI([time64], [explicit time64 time_t support])
- AS_IF([test $ac_cv_sys_file_offset_bits -eq 64 && \
+ AC_CHECK_SIZEOF([off_t], [], [[
+#define _FILE_OFFSET_BITS 64
+#include <sys/types.h>
+]])
+ AS_IF([test $ac_cv_sizeof_off_t = 8], [
+ libbsd_sys_has_lfs=1
+ ], [
+ libbsd_sys_has_lfs=0
+ ])
+
+ AS_IF([test $libbsd_sys_has_lfs -eq 1 && \
test $libbsd_sys_time_bits -eq 32 && \
test $ac_cv_sizeof_time_t -eq 8], [
AC_DEFINE([_TIME_BITS], [64], [Enable 64-bit time_t support])