build-sys: disable syscall fallbacks for non-linux systems

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/configure.ac b/configure.ac
index ca1c525f4572d6910cca3f720dd0963fa5e9f73d..66bfa51c4afd55f198d679ca862ecbccc4dd69be 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -27,6 +27,14 @@ esac
 AC_PROG_CC_STDC
 AC_GNU_SOURCE
 
+linux_os=no
+case ${host_os} in
+  *linux*)
+    linux_os=yes
+    ;;
+esac
+AM_CONDITIONAL([LINUX], test x$linux_os = xyes)
+
 AC_PATH_PROG(PERL, perl)
 AC_PATH_PROG(BLKID, blkid, [], [$PATH:/sbin])
 AC_PATH_PROG(VOLID, vol_id, [], [$PATH:/lib/udev])
@@ -208,9 +216,11 @@ AC_DEFUN([UTIL_CHECK_SYSCALL], [
        [syscall=_NR_$1],
        [
          syscall=no
-         case $host_cpu in
-           _UTIL_CHECK_SYSCALL_FALLBACK(m4_shift($@))
-         esac
+         if test $linux_os = yes; then
+           case $host_cpu in
+             _UTIL_CHECK_SYSCALL_FALLBACK(m4_shift($@))
+           esac
+         fi
         ])
       ])
     util_cv_syscall_$1=$syscall
@@ -294,14 +304,6 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 [AC_MSG_NOTICE([Your libc thinks that swapon has 1 arg only.])
 ])
 
-case ${host_os} in
-  *linux*)
-    AM_CONDITIONAL([LINUX], [true])
-    ;;
-  *)
-    AM_CONDITIONAL([LINUX], [false])
-    ;;
-esac
 
 dnl UTIL_SET_ARCH(ARCHNAME, PATTERN)
 dnl ---------------------------------