Don't leak file descriptors

[qemu.git] / configure

diff --git a/configure b/configure
index dca5a430f60c143786c6f3b6421684785c721ef0..ef15948d7fd3361d0885e3c9cf1fdb8df0737a66 100755 (executable)
--- a/configure
+++ b/configure
@@ -91,6 +91,26 @@ ar="${cross_prefix}${ar}"
 objcopy="${cross_prefix}${objcopy}"
 ld="${cross_prefix}${ld}"
 
+# default flags for all hosts
+QEMU_CFLAGS="-fno-strict-aliasing $QEMU_CFLAGS"
+CFLAGS="-g $CFLAGS"
+QEMU_CFLAGS="-Wall -Wundef -Wendif-labels -Wwrite-strings -Wmissing-prototypes $QEMU_CFLAGS"
+QEMU_CFLAGS="-Wstrict-prototypes -Wredundant-decls $QEMU_CFLAGS"
+QEMU_CFLAGS="-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE $QEMU_CFLAGS"
+QEMU_CFLAGS="-U_FORTIFY_SOURCE $QEMU_CFLAGS"
+QEMU_CFLAGS="-I. -I\$(SRC_PATH) $QEMU_CFLAGS"
+LDFLAGS="-g $LDFLAGS"
+
+gcc_flags="-Wold-style-declaration -Wold-style-definition"
+cat > $TMPC << EOF
+int main(void) { }
+EOF
+for flag in $gcc_flags; do
+    if compile_prog "$QEMU_CFLAGS" "$flag" ; then
+       QEMU_CFLAGS="$flag $QEMU_CFLAGS"
+    fi
+done
+
 # check that the C compiler works.
 cat > $TMPC <<EOF
 int main(void) {}
@@ -1550,6 +1570,23 @@ if compile_prog "" "" ; then
   pipe2=yes
 fi
 
+# check if accept4 is there
+accept4=no
+cat > $TMPC << EOF
+#define _GNU_SOURCE
+#include <sys/socket.h>
+#include <stddef.h>
+
+int main(void)
+{
+    accept4(0, NULL, NULL, SOCK_CLOEXEC);
+    return 0;
+}
+EOF
+if compile_prog "" "" ; then
+  accept4=yes
+fi
+
 # check if tee/splice is there. vmsplice was added same time.
 splice=no
 cat > $TMPC << EOF
@@ -1596,7 +1633,7 @@ int main(void)
     return 0;
 }
 EOF
-if compile_prog "" "" ; then
+if compile_prog "$ARCH_CFLAGS" "" ; then
   fallocate=yes
 fi
 
@@ -1744,28 +1781,9 @@ fi
 # End of CC checks
 # After here, no more $cc or $ld runs
 
-# default flags for all hosts
-QEMU_CFLAGS="-fno-strict-aliasing $QEMU_CFLAGS"
-CFLAGS="-g $CFLAGS"
 if test "$debug" = "no" ; then
   CFLAGS="-O2 $CFLAGS"
 fi
-QEMU_CFLAGS="-Wall -Wundef -Wendif-labels -Wwrite-strings -Wmissing-prototypes $QEMU_CFLAGS"
-QEMU_CFLAGS="-Wstrict-prototypes -Wredundant-decls $QEMU_CFLAGS"
-QEMU_CFLAGS="-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE $QEMU_CFLAGS"
-QEMU_CFLAGS="-U_FORTIFY_SOURCE $QEMU_CFLAGS"
-QEMU_CFLAGS="-I. -I\$(SRC_PATH) $QEMU_CFLAGS"
-LDFLAGS="-g $LDFLAGS"
-
-gcc_flags="-Wold-style-declaration -Wold-style-definition"
-cat > $TMPC << EOF
-int main(void) { }
-EOF
-for flag in $gcc_flags; do
-    if compile_prog "$QEMU_CFLAGS" "$flag" ; then
-       QEMU_CFLAGS="$flag $QEMU_CFLAGS"
-    fi
-done
 
 # Consult white-list to determine whether to enable werror
 # by default.  Only enable by default for git builds
@@ -2013,6 +2031,9 @@ fi
 if test "$pipe2" = "yes" ; then
   echo "CONFIG_PIPE2=y" >> $config_host_mak
 fi
+if test "$accept4" = "yes" ; then
+  echo "CONFIG_ACCEPT4=y" >> $config_host_mak
+fi
 if test "$splice" = "yes" ; then
   echo "CONFIG_SPLICE=y" >> $config_host_mak
 fi