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Autotool new options : --with/--without -getrandom and --with/--without -sysgetrandom.

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Autodetect works by default for getrandom and sysgetrandom.
With the these options user can use the detected functions or ignore them.
This commit is contained in:
kkkunche 2019-08-06 14:41:23 +05:30 committed by Sebastian Pipping
parent e9db1a75c4
commit d6cd0e4769
1 changed files with 44 additions and 24 deletions
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68
expat/configure.ac
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@ -183,33 +183,53 @@ AC_LINK_IFELSE([AC_LANG_SOURCE([
AC_MSG_RESULT([yes])], AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])])]) [AC_MSG_RESULT([no])])])
AC_ARG_WITH([getrandom],
[AS_HELP_STRING([--with-getrandom],
[enforce the use of getrandom function in the system @<:@default=check@:>@])
AS_HELP_STRING([--without-getrandom],
[skip auto detect of getrandom @<:@default=check@:>@])],
[],
[with_getrandom=check])
AC_MSG_CHECKING([for getrandom (Linux 3.17+, glibc 2.25+)]) AS_IF([test "x$with_getrandom" != xno],
AC_LINK_IFELSE([AC_LANG_SOURCE([ [AC_MSG_CHECKING([for getrandom (Linux 3.17+, glibc 2.25+)])
#include <stdlib.h> /* for NULL */
#include <sys/random.h>
int main() {
return getrandom(NULL, 0U, 0U);
}
])],
[AC_DEFINE([HAVE_GETRANDOM], [1], [Define to 1 if you have the `getrandom' function.])
AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
AC_MSG_CHECKING([for syscall SYS_getrandom (Linux 3.17+)])
AC_LINK_IFELSE([AC_LANG_SOURCE([ AC_LINK_IFELSE([AC_LANG_SOURCE([
#include <stdlib.h> /* for NULL */ #include <stdlib.h> /* for NULL */
#include <unistd.h> /* for syscall */ #include <sys/random.h>
#include <sys/syscall.h> /* for SYS_getrandom */ int main() {
int main() { return getrandom(NULL, 0U, 0U);
syscall(SYS_getrandom, NULL, 0, 0); }
return 0; ])],
} [AC_DEFINE([HAVE_GETRANDOM], [1], [Define to 1 if you have the `getrandom' function.])
])], AC_MSG_RESULT([yes])],
[AC_DEFINE([HAVE_SYSCALL_GETRANDOM], [1], [Define to 1 if you have `syscall' and `SYS_getrandom'.]) [AC_MSG_RESULT([no])
AC_MSG_RESULT([yes])], AS_IF([test "x$with_getrandom" = xyes],
[AC_MSG_RESULT([no])])]) [AC_MSG_ERROR([enforced the use of getrandom --with-getrandom, but not detected])])])])
AC_ARG_WITH([sys_getrandom],
[AS_HELP_STRING([--with-sys-getrandom],
[enforce the use of syscall SYS_getrandom function in the system @<:@default=check@:>@])
AS_HELP_STRING([--without-sys-getrandom],
[skip auto detect of syscall SYS_getrandom @<:@default=check@:>@])],
[],
[with_sys_getrandom=check])
AS_IF([test "x$with_sys_getrandom" != xno],
[AC_MSG_CHECKING([for syscall SYS_getrandom (Linux 3.17+)])
AC_LINK_IFELSE([AC_LANG_SOURCE([
#include <stdlib.h> /* for NULL */
#include <unistd.h> /* for syscall */
#include <sys/syscall.h> /* for SYS_getrandom */
int main() {
syscall(SYS_getrandom, NULL, 0, 0);
return 0;
}
])],
[AC_DEFINE([HAVE_SYSCALL_GETRANDOM], [1], [Define to 1 if you have `syscall' and `SYS_getrandom'.])
AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
AS_IF([test "x$with_sys_getrandom" = xyes],
[AC_MSG_ERROR([enforced the use of syscall SYS_getrandom --with-sys-getrandom, but not detected])])])])
dnl Only needed for xmlwf: dnl Only needed for xmlwf:
AC_CHECK_HEADERS(fcntl.h unistd.h) AC_CHECK_HEADERS(fcntl.h unistd.h)