posix-aio-compat: Honour AsyncContext

[qemu.git] / configure

diff --git a/configure b/configure
index 35cf6cc8344b877c27fafb08008f9abf6578eb52..43d87c5276d90fe732eb26df3316e0ce3329f733 100755 (executable)
--- a/configure
+++ b/configure
@@ -13,10 +13,9 @@ fi
 
 TMPC="${TMPDIR1}/qemu-conf-${RANDOM}-$$-${RANDOM}.c"
 TMPO="${TMPDIR1}/qemu-conf-${RANDOM}-$$-${RANDOM}.o"
-TMPE="${TMPDIR1}/qemu-conf-${RANDOM}-$$-${RANDOM}"
-TMPD="${TMPDIR1}/qemu-conf-${RANDOM}-$$-${RANDOM}.d"
+TMPE="${TMPDIR1}/qemu-conf-${RANDOM}-$$-${RANDOM}.exe"
 
-trap "rm -f $TMPC $TMPO $TMPE $TMPD ; exit" 0 2 3 15
+trap "rm -f $TMPC $TMPO $TMPE ; exit" 0 2 3 15
 
 compile_object() {
   $cc $QEMU_CFLAGS -c -o $TMPO $TMPC > /dev/null 2> /dev/null
@@ -1570,6 +1569,36 @@ if compile_prog "" "" ; then
   eventfd=yes
 fi
 
+# check for fallocate
+fallocate=no
+cat > $TMPC << EOF
+#include <fcntl.h>
+
+int main(void)
+{
+    fallocate(0, 0, 0, 0);
+    return 0;
+}
+EOF
+if $cc $ARCH_CFLAGS -o $TMPE $TMPC 2> /dev/null ; then
+  fallocate=yes
+fi
+
+# check for dup3
+dup3=no
+cat > $TMPC << EOF
+#include <unistd.h>
+
+int main(void)
+{
+    dup3(0, 0, 0);
+    return 0;
+}
+EOF
+if $cc $ARCH_CFLAGS -o $TMPE $TMPC 2> /dev/null ; then
+  dup3=yes
+fi
+
 # Check if tools are available to build documentation.
 if test "$docs" != "no" ; then
   if test -x "`which texi2html 2>/dev/null`" -a \
@@ -1583,7 +1612,7 @@ if test "$docs" != "no" ; then
   fi
 fi
 
-# Search for bsawp_32 function
+# Search for bswap_32 function
 byteswap_h=no
 cat > $TMPC << EOF
 #include <byteswap.h>
@@ -1593,7 +1622,7 @@ if compile_prog "" "" ; then
   byteswap_h=yes
 fi
 
-# Search for bsawp_32 function
+# Search for bswap_32 function
 bswap_h=no
 cat > $TMPC << EOF
 #include <sys/endian.h>
@@ -1667,6 +1696,23 @@ if compile_prog "" "" ; then
     need_offsetof=no
 fi
 
+##########################################
+# check if the compiler understands attribute warn_unused_result
+#
+# This could be smarter, but gcc -Werror does not error out even when warning
+# about attribute warn_unused_result
+
+gcc_attribute_warn_unused_result=no
+cat > $TMPC << EOF
+#if defined(__GNUC__) && (__GNUC__ < 4) && defined(__GNUC_MINOR__) && (__GNUC__ < 4)
+#error gcc 3.3 or older
+#endif
+int main(void) { return 0;}
+EOF
+if compile_prog "" ""; then
+    gcc_attribute_warn_unused_result=yes
+fi
+
 ##########################################
 # check if we have fdatasync
 
@@ -1692,7 +1738,7 @@ QEMU_CFLAGS="-Wall -Wundef -Wendif-labels -Wwrite-strings -Wmissing-prototypes $
 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) -MMD -MP -MT \$@ $QEMU_CFLAGS"
+QEMU_CFLAGS="-I. -I\$(SRC_PATH) $QEMU_CFLAGS"
 LDFLAGS="-g $LDFLAGS"
 
 gcc_flags="-Wold-style-declaration -Wold-style-definition"
@@ -1951,6 +1997,12 @@ fi
 if test "$eventfd" = "yes" ; then
   echo "CONFIG_EVENTFD=y" >> $config_host_mak
 fi
+if test "$fallocate" = "yes" ; then
+  echo "CONFIG_FALLOCATE=y" >> $config_host_mak
+fi
+if test "$dup3" = "yes" ; then
+  echo "CONFIG_DUP3=y" >> $config_host_mak
+fi
 if test "$inotify" = "yes" ; then
   echo "CONFIG_INOTIFY=y" >> $config_host_mak
 fi
@@ -1995,6 +2047,9 @@ fi
 if test "$need_offsetof" = "yes" ; then
   echo "CONFIG_NEED_OFFSETOF=y" >> $config_host_mak
 fi
+if test "$gcc_attribute_warn_unused_result" = "yes" ; then
+  echo "CONFIG_GCC_ATTRIBUTE_WARN_UNUSED_RESULT=y" >> $config_host_mak
+fi
 if test "$fdatasync" = "yes" ; then
   echo "CONFIG_FDATASYNC=y" >> $config_host_mak
 fi