configure: remove boolean variables for targets

Just use $targetos always.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

configure

@@ -374,45 +374,14 @@ fi
 
 # OS specific
 
-mingw32="no"
-bsd="no"
-linux="no"
-solaris="no"
 case $targetos in
 windows)
-  mingw32="yes"
   plugins="no"
   pie="no"
 ;;
-gnu/kfreebsd)
-  bsd="yes"
-;;
-freebsd)
-  bsd="yes"
-  # needed for kinfo_getvmmap(3) in libutil.h
-;;
-dragonfly)
-  bsd="yes"
-;;
-netbsd)
-  bsd="yes"
-;;
-openbsd)
-  bsd="yes"
-;;
-darwin)
-  bsd="yes"
-  darwin="yes"
-;;
-sunos)
-  solaris="yes"
-;;
 haiku)
   pie="no"
 ;;
-linux)
-  linux="yes"
-;;
 esac
 
 if test ! -z "$cpu" ; then
@@ -627,7 +596,7 @@ do
     fi
 done
 
-if test "$mingw32" = "yes" ; then
+if test "$targetos" = "windows" ; then
   EXESUF=".exe"
   prefix="/qemu"
   bindir=""
@@ -809,7 +778,7 @@ for opt do
   ;;
   --enable-download) download="enabled"; git_submodules_action=update;
   ;;
-  --enable-plugins) if test "$mingw32" = "yes"; then
+  --enable-plugins) if test "$targetos" = "windows"; then
                         error_exit "TCG plugins not currently supported on Windows platforms"
                     else
                         plugins="yes"
@@ -1080,7 +1049,7 @@ fi
 # by default.  Only enable by default for git builds
 if test -z "$werror" ; then
     if test -e "$source_path/.git" && \
-        { test "$linux" = "yes" || test "$mingw32" = "yes"; }; then
+        { test "$targetos" = linux || test "$targetos" = "windows"; }; then
         werror="yes"
     else
         werror="no"
@@ -1718,7 +1687,7 @@ echo all: >> $config_host_mak
 if test "$debug_tcg" = "yes" ; then
   echo "CONFIG_DEBUG_TCG=y" >> $config_host_mak
 fi
-if test "$mingw32" = "yes" ; then
+if test "$targetos" = "windows"; then
   echo "CONFIG_WIN32=y" >> $config_host_mak
   echo "QEMU_GA_MANUFACTURER=${QEMU_GA_MANUFACTURER-QEMU}" >> $config_host_mak
   echo "QEMU_GA_DISTRO=${QEMU_GA_DISTRO-Linux}" >> $config_host_mak
@@ -1727,24 +1696,26 @@ else
   echo "CONFIG_POSIX=y" >> $config_host_mak
 fi
 
-if test "$linux" = "yes" ; then
+if test "$targetos" = "linux" ; then
   echo "CONFIG_LINUX=y" >> $config_host_mak
 fi
 
-if test "$darwin" = "yes" ; then
+if test "$targetos" = "darwin" ; then
   echo "CONFIG_DARWIN=y" >> $config_host_mak
 fi
 
-if test "$solaris" = "yes" ; then
+if test "$targetos" = "sunos" ; then
   echo "CONFIG_SOLARIS=y" >> $config_host_mak
 fi
 echo "SRC_PATH=$source_path" >> $config_host_mak
 echo "TARGET_DIRS=$target_list" >> $config_host_mak
 
 # XXX: suppress that
-if [ "$bsd" = "yes" ] ; then
-  echo "CONFIG_BSD=y" >> $config_host_mak
-fi
+case $targetos in
+  gnu/kfreebsd | freebsd | dragonfly | netbsd | openbsd | darwin)
+    echo "CONFIG_BSD=y" >> $config_host_mak
+    ;;
+esac
 
 if test "$plugins" = "yes" ; then
     echo "CONFIG_PLUGIN=y" >> $config_host_mak
@@ -1774,7 +1745,7 @@ echo "CC=$cc" >> $config_host_mak
 echo "EXESUF=$EXESUF" >> $config_host_mak
 
 # use included Linux headers for KVM architectures
-if test "$linux" = "yes" && test -n "$linux_arch"; then
+if test "$targetos" = "linux" && test -n "$linux_arch"; then
   symlink "$source_path/linux-headers/asm-$linux_arch" linux-headers/asm
 fi