dnl ** check if it is safe to include both <time.h> and <sys/time.h>
AC_HEADER_TIME
-dnl ** how do we get a timezone name, and UTC offset ?
-AC_STRUCT_TIMEZONE
-
-dnl ** do we have altzone?
-FP_DECL_ALTZONE
-
dnl ** do we have long longs?
AC_CHECK_TYPES([long long])
AC_MSG_CHECKING(for .subsections_via_symbols)
-AC_TRY_COMPILE(,[__asm__ (".subsections_via_symbols");],
- [
- AC_MSG_RESULT(yes)
- AC_DEFINE([HAVE_SUBSECTIONS_VIA_SYMBOLS],[1],
- [Define to 1 if Apple-style dead-stripping is supported.])
+AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([], [__asm__ (".subsections_via_symbols");])],
+ [AC_MSG_RESULT(yes)
+ AC_DEFINE([HAVE_SUBSECTIONS_VIA_SYMBOLS],[1],
+ [Define to 1 if Apple-style dead-stripping is supported.])
],
- [
- AC_MSG_RESULT(no)
- AC_DEFINE([HAVE_SUBSECTIONS_VIA_SYMBOLS],[0],
- [Define to 1 if Apple-style dead-stripping is supported.])
- ])
+ [AC_MSG_RESULT(no)])
+
+dnl *** check for GNU non-executable stack note support (ELF only)
+dnl (.section .note.GNU-stack,"",@progbits)
+
+AC_MSG_CHECKING(for GNU non-executable stack support)
+AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([__asm__ (".section .note.GNU-stack,\"\",@progbits");], [0])],
+ [AC_MSG_RESULT(yes)
+ AC_DEFINE([HAVE_GNU_NONEXEC_STACK],[1],
+ [Define to 1 if GNU non-executable stack notes are supported.])
+ ],
+ [AC_MSG_RESULT(no)])
dnl ** check for librt
AC_CHECK_LIB(rt, clock_gettime)