* [Qemu-devel] [PATCH 1/3] configure: Provide and use convenience error reporting function
2013-03-14 15:25 [Qemu-devel] [PATCH 0/3] configure: fix coroutine backend selection logic Peter Maydell
@ 2013-03-14 15:25 ` Peter Maydell
2013-03-14 15:25 ` [Qemu-devel] [PATCH 2/3] configure: Move upper() up so it's available earlier Peter Maydell
2013-03-14 15:25 ` [Qemu-devel] [PATCH 3/3] configure: Don't fall back to gthread coroutine backend Peter Maydell
2 siblings, 0 replies; 6+ messages in thread
From: Peter Maydell @ 2013-03-14 15:25 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, patches
Provide a convenience function for reporting an error and exiting,
and update various places in the configure script to use it.
This allows us to be a little more consistent about how format
our error messages and makes the calling code shorter.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
configure | 193 ++++++++++++++++++++++++-------------------------------------
1 file changed, 75 insertions(+), 118 deletions(-)
diff --git a/configure b/configure
index a382ff2..c674d39 100755
--- a/configure
+++ b/configure
@@ -27,6 +27,17 @@ printf " '%s'" "$0" "$@" >> config.log
echo >> config.log
echo "#" >> config.log
+error_exit() {
+ echo
+ echo "ERROR: $1"
+ while test -n "$2"; do
+ echo " $2"
+ shift
+ done
+ echo
+ exit 1
+}
+
do_cc() {
# Run the compiler, capturing its output to the log.
echo $cc "$@" >> config.log
@@ -46,11 +57,10 @@ do_cc() {
esac
echo $cc -Werror "$@" >> config.log
$cc -Werror "$@" >> config.log 2>&1 && return $?
- echo "ERROR: configure test passed without -Werror but failed with -Werror."
- echo "This is probably a bug in the configure script. The failing command"
- echo "will be at the bottom of config.log."
- echo "You can run configure with --disable-werror to bypass this check."
- exit 1
+ error_exit "configure test passed without -Werror but failed with -Werror." \
+ "This is probably a bug in the configure script. The failing command" \
+ "will be at the bottom of config.log." \
+ "You can run configure with --disable-werror to bypass this check."
}
compile_object() {
@@ -494,11 +504,10 @@ SunOS)
LDFLAGS="-L/opt/SUNWspro/prod/lib -R/opt/SUNWspro/prod/lib $LDFLAGS"
LIBS="-lsunmath $LIBS"
else
- echo "QEMU will not link correctly on Solaris 8/X86 or 9/x86 without"
- echo "libsunmath from the Sun Studio compilers tools, due to a lack of"
- echo "C99 math features in libm.so in Solaris 8/x86 and Solaris 9/x86"
- echo "Studio 11 can be downloaded from www.sun.com."
- exit 1
+ error_exit "QEMU will not link correctly on Solaris 8/X86 or 9/x86 without" \
+ "libsunmath from the Sun Studio compilers tools, due to a lack of" \
+ "C99 math features in libm.so in Solaris 8/x86 and Solaris 9/x86" \
+ "Studio 11 can be downloaded from www.sun.com."
fi
fi
fi
@@ -1176,8 +1185,7 @@ if test "$ARCH" = "unknown"; then
echo "Unsupported CPU = $cpu, will use TCG with TCI (experimental)"
ARCH=tci
else
- echo "Unsupported CPU = $cpu, try --enable-tcg-interpreter"
- exit 1
+ error_exit "Unsupported CPU = $cpu, try --enable-tcg-interpreter"
fi
fi
@@ -1189,8 +1197,7 @@ EOF
if compile_object ; then
: C compiler works ok
else
- echo "ERROR: \"$cc\" either does not exist or does not work"
- exit 1
+ error_exit "\"$cc\" either does not exist or does not work"
fi
# Consult white-list to determine whether to enable werror
@@ -1245,8 +1252,7 @@ fi
if test "$static" = "yes" ; then
if test "$pie" = "yes" ; then
- echo "static and pie are mutually incompatible"
- exit 1
+ error_exit "static and pie are mutually incompatible"
else
pie="no"
fi
@@ -1285,8 +1291,7 @@ EOF
fi
else
if test "$pie" = "yes"; then
- echo "PIE not available due to missing toolchain support"
- exit 1
+ error_exit "PIE not available due to missing toolchain support"
else
echo "Disabling PIE due to missing toolchain support"
pie="no"
@@ -1301,40 +1306,36 @@ if test "$solaris" = "yes" ; then
if has $install; then
:
else
- echo "Solaris install program not found. Use --install=/usr/ucb/install or"
- echo "install fileutils from www.blastwave.org using pkg-get -i fileutils"
- echo "to get ginstall which is used by default (which lives in /opt/csw/bin)"
- exit 1
+ error_exit "Solaris install program not found. Use --install=/usr/ucb/install or" \
+ "install fileutils from www.blastwave.org using pkg-get -i fileutils" \
+ "to get ginstall which is used by default (which lives in /opt/csw/bin)"
fi
if test "`path_of $install`" = "/usr/sbin/install" ; then
- echo "Error: Solaris /usr/sbin/install is not an appropriate install program."
- echo "try ginstall from the GNU fileutils available from www.blastwave.org"
- echo "using pkg-get -i fileutils, or use --install=/usr/ucb/install"
- exit 1
+ error_exit "Solaris /usr/sbin/install is not an appropriate install program." \
+ "try ginstall from the GNU fileutils available from www.blastwave.org" \
+ "using pkg-get -i fileutils, or use --install=/usr/ucb/install"
fi
if has ar; then
:
else
- echo "Error: No path includes ar"
if test -f /usr/ccs/bin/ar ; then
- echo "Add /usr/ccs/bin to your path and rerun configure"
+ error_exit "No path includes ar" \
+ "Add /usr/ccs/bin to your path and rerun configure"
fi
- exit 1
+ error_exit "No path includes ar"
fi
fi
if ! has $python; then
- echo "Python not found. Use --python=/path/to/python"
- exit 1
+ error_exit "Python not found. Use --python=/path/to/python"
fi
# Note that if the Python conditional here evaluates True we will exit
# with status 1 which is a shell 'false' value.
if ! "$python" -c 'import sys; sys.exit(sys.version_info < (2,4) or sys.version_info >= (3,))'; then
- echo "Cannot use '$python', Python 2.4 or later is required."
- echo "Note that Python 3 or later is not yet supported."
- echo "Use --python=/path/to/python to specify a supported Python."
- exit 1
+ error_exit "Cannot use '$python', Python 2.4 or later is required." \
+ "Note that Python 3 or later is not yet supported." \
+ "Use --python=/path/to/python to specify a supported Python."
fi
if test -z "${target_list+xxx}" ; then
@@ -1353,11 +1354,8 @@ esac
feature_not_found() {
feature=$1
- echo "ERROR"
- echo "ERROR: User requested feature $feature"
- echo "ERROR: configure was not able to find it"
- echo "ERROR"
- exit 1;
+ error_exit "User requested feature $feature" \
+ "configure was not able to find it"
}
if test -z "$cross_prefix" ; then
@@ -1399,8 +1397,7 @@ fi
# pkg-config probe
if ! has "$pkg_config_exe"; then
- echo "Error: pkg-config binary '$pkg_config_exe' not found"
- exit 1
+ error_exit "pkg-config binary '$pkg_config_exe' not found"
fi
##########################################
@@ -1439,11 +1436,8 @@ EOF
if compile_prog "" "-lz" ; then
:
else
- echo
- echo "Error: zlib check failed"
- echo "Make sure to have the zlib libs and headers installed."
- echo
- exit 1
+ error_exit "zlib check failed" \
+ "Make sure to have the zlib libs and headers installed."
fi
fi
@@ -1620,14 +1614,12 @@ if test "$xen_pci_passthrough" != "no"; then
xen_pci_passthrough=yes
else
if test "$xen_pci_passthrough" = "yes"; then
- echo "ERROR"
- echo "ERROR: User requested feature Xen PCI Passthrough"
- echo "ERROR: but this feature require /sys from Linux"
if test "$xen_ctrl_version" -lt 340; then
- echo "ERROR: This feature does not work with Xen 3.3"
+ error_exit "User requested feature Xen PCI Passthrough" \
+ "This feature does not work with Xen 3.3"
fi
- echo "ERROR"
- exit 1;
+ error_exit "User requested feature Xen PCI Passthrough" \
+ " but this feature requires /sys from Linux"
fi
xen_pci_passthrough=no
fi
@@ -2001,11 +1993,8 @@ EOF
if compile_prog "$cfl" "$lib" ; then
:
else
- echo
- echo "Error: $drv check failed"
- echo "Make sure to have the $drv libs and headers installed."
- echo
- exit 1
+ error_exit "$drv check failed" \
+ "Make sure to have the $drv libs and headers installed."
fi
}
@@ -2020,11 +2009,8 @@ for drv in $audio_drv_list; do
fmod)
if test -z $fmod_lib || test -z $fmod_inc; then
- echo
- echo "Error: You must specify path to FMOD library and headers"
- echo "Example: --fmod-inc=/path/include/fmod --fmod-lib=/path/lib/libfmod-3.74.so"
- echo
- exit 1
+ error_exit "You must specify path to FMOD library and headers" \
+ "Example: --fmod-inc=/path/include/fmod --fmod-lib=/path/lib/libfmod-3.74.so"
fi
audio_drv_probe $drv fmod.h $fmod_lib "return FSOUND_GetVersion();" "-I $fmod_inc"
libs_softmmu="$fmod_lib $libs_softmmu"
@@ -2067,11 +2053,8 @@ for drv in $audio_drv_list; do
*)
echo "$audio_possible_drivers" | grep -q "\<$drv\>" || {
- echo
- echo "Error: Unknown driver '$drv' selected"
- echo "Possible drivers are: $audio_possible_drivers"
- echo
- exit 1
+ error_exit "Unknown driver '$drv' selected" \
+ "Possible drivers are: $audio_possible_drivers"
}
;;
esac
@@ -2200,8 +2183,7 @@ then
LIBS="$glib_libs $LIBS"
libs_qga="$glib_libs $libs_qga"
else
- echo "glib-$glib_req_ver required to compile QEMU"
- exit 1
+ error_exit "glib-$glib_req_ver required to compile QEMU"
fi
##########################################
@@ -2218,11 +2200,10 @@ if test "$pixman" = ""; then
fi
if test "$pixman" = "none"; then
if test "$want_tools" != "no" -o "$softmmu" != "no"; then
- echo "ERROR: pixman disabled but system emulation or tools build"
- echo " enabled. You can turn off pixman only if you also"
- echo " disable all system emulation targets and the tools"
- echo " build with '--disable-tools --disable-system'."
- exit 1
+ error_exit "pixman disabled but system emulation or tools build" \
+ "enabled. You can turn off pixman only if you also" \
+ "disable all system emulation targets and the tools" \
+ "build with '--disable-tools --disable-system'."
fi
pixman_cflags=
pixman_libs=
@@ -2231,12 +2212,11 @@ elif test "$pixman" = "system"; then
pixman_libs=`$pkg_config --libs pixman-1 2>/dev/null`
else
if test ! -d ${source_path}/pixman/pixman; then
- echo "ERROR: pixman not present. Your options:"
- echo " (1) Preferred: Install the pixman devel package (any recent"
- echo " distro should have packages as Xorg needs pixman too)."
- echo " (2) Fetch the pixman submodule, using:"
- echo " git submodule update --init pixman"
- exit 1
+ error_exit "pixman not present. Your options:" \
+ " (1) Preferred: Install the pixman devel package (any recent" \
+ " distro should have packages as Xorg needs pixman too)." \
+ " (2) Fetch the pixman submodule, using:" \
+ " git submodule update --init pixman"
fi
mkdir -p pixman/pixman
pixman_cflags="-I\$(SRC_PATH)/pixman/pixman -I\$(BUILD_DIR)/pixman/pixman"
@@ -2295,11 +2275,8 @@ else
fi
if test "$mingw32" != yes -a "$pthread" = no; then
- echo
- echo "Error: pthread check failed"
- echo "Make sure to have the pthread libs and headers installed."
- echo
- exit 1
+ error_exit "pthread check failed" \
+ "Make sure to have the pthread libs and headers installed."
fi
##########################################
@@ -2354,8 +2331,7 @@ fi
if test "$virtio_blk_data_plane" = "yes" -a \
"$linux_aio" != "yes" ; then
- echo "Error: virtio-blk-data-plane requires Linux AIO, please try --enable-linux-aio"
- exit 1
+ error_exit "virtio-blk-data-plane requires Linux AIO, please try --enable-linux-aio"
elif test -z "$virtio_blk_data_plane" ; then
virtio_blk_data_plane=$linux_aio
fi
@@ -2838,10 +2814,7 @@ elif compile_prog "" "-lm" ; then
LIBS="-lm $LIBS"
libs_qga="-lm $libs_qga"
else
- echo
- echo "Error: libm check failed"
- echo
- exit 1
+ error_exit "libm check failed"
fi
##########################################
@@ -3017,11 +2990,8 @@ fi
$python "$source_path/scripts/tracetool.py" "--backend=$trace_backend" --check-backend > /dev/null 2> /dev/null
if test "$?" -ne 0 ; then
- echo
- echo "Error: invalid trace backend"
- echo "Please choose a supported trace backend."
- echo
- exit 1
+ error_exit "invalid trace backend" \
+ "Please choose a supported trace backend."
fi
##########################################
@@ -3036,10 +3006,7 @@ EOF
LIBS="-lust -lurcu-bp $LIBS"
libs_qga="-lust -lurcu-bp $libs_qga"
else
- echo
- echo "Error: Trace backend 'ust' missing libust header files"
- echo
- exit 1
+ error_exit "Trace backend 'ust' missing libust header files"
fi
fi
@@ -3047,10 +3014,7 @@ fi
# For 'dtrace' backend, test if 'dtrace' command is present
if test "$trace_backend" = "dtrace"; then
if ! has 'dtrace' ; then
- echo
- echo "Error: dtrace command is not found in PATH $PATH"
- echo
- exit 1
+ error_exit "dtrace command is not found in PATH $PATH"
fi
trace_backend_stap="no"
if has 'stap' ; then
@@ -3108,10 +3072,7 @@ elif test "$coroutine" = "windows" ; then
elif test "$coroutine" = "sigaltstack" ; then
coroutine_backend=sigaltstack
else
- echo
- echo "Error: unknown coroutine backend $coroutine"
- echo
- exit 1
+ error_exit "unknown coroutine backend $coroutine"
fi
##########################################
@@ -3296,8 +3257,7 @@ if test "$softmmu" = yes ; then
tools="$tools fsdev/virtfs-proxy-helper\$(EXESUF)"
else
if test "$virtfs" = yes; then
- echo "VirtFS is supported only on Linux and requires libcap-devel and libattr-devel"
- exit 1
+ error_exit "VirtFS is supported only on Linux and requires libcap-devel and libattr-devel"
fi
virtfs=no
fi
@@ -3943,22 +3903,20 @@ case "$target" in
;;
${target_arch2}-linux-user)
if test "$linux" != "yes" ; then
- echo "ERROR: Target '$target' is only available on a Linux host"
- exit 1
+ error_exit "Target '$target' is only available on a Linux host"
fi
target_user_only="yes"
target_linux_user="yes"
;;
${target_arch2}-bsd-user)
if test "$bsd" != "yes" ; then
- echo "ERROR: Target '$target' is only available on a BSD host"
- exit 1
+ error_exit "Target '$target' is only available on a BSD host"
fi
target_user_only="yes"
target_bsd_user="yes"
;;
*)
- echo "ERROR: Target '$target' not recognised"
+ error_exit "Target '$target' not recognised"
exit 1
;;
esac
@@ -4087,8 +4045,7 @@ case "$target_arch2" in
TARGET_ARCH=xtensa
;;
*)
- echo "Unsupported target CPU"
- exit 1
+ error_exit "Unsupported target CPU"
;;
esac
# TARGET_BASE_ARCH needs to be defined after TARGET_ARCH
--
1.7.9.5
^ permalink raw reply related [flat|nested] 6+ messages in thread* [Qemu-devel] [PATCH 3/3] configure: Don't fall back to gthread coroutine backend
2013-03-14 15:25 [Qemu-devel] [PATCH 0/3] configure: fix coroutine backend selection logic Peter Maydell
2013-03-14 15:25 ` [Qemu-devel] [PATCH 1/3] configure: Provide and use convenience error reporting function Peter Maydell
2013-03-14 15:25 ` [Qemu-devel] [PATCH 2/3] configure: Move upper() up so it's available earlier Peter Maydell
@ 2013-03-14 15:25 ` Peter Maydell
2013-03-14 15:54 ` Paolo Bonzini
2 siblings, 1 reply; 6+ messages in thread
From: Peter Maydell @ 2013-03-14 15:25 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, patches
The gthread coroutine backend is broken and does not produce a working
QEMU; it is only useful for some very limited debugging situations.
Clean up the backend selection logic in configure so that it now runs
"if on windows use windows; else prefer ucontext; else sigaltstack".
To do this we refactor the configure code to separate out "test
whether we have a working ucontext", "pick a default if user didn't
specify" and "validate that user didn't specify something invalid",
rather than having all three of these run together. We also have to
adjust the Makefile logic so it doesn't also encode an idea of the
default backend.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
Makefile.objs | 6 +++---
configure | 67 +++++++++++++++++++++++++++++++++++++--------------------
2 files changed, 47 insertions(+), 26 deletions(-)
diff --git a/Makefile.objs b/Makefile.objs
index f99841c..7f541a4 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -18,12 +18,12 @@ block-obj-y += qemu-coroutine.o qemu-coroutine-lock.o qemu-coroutine-io.o
block-obj-y += qemu-coroutine-sleep.o
ifeq ($(CONFIG_UCONTEXT_COROUTINE),y)
block-obj-$(CONFIG_POSIX) += coroutine-ucontext.o
-else
+endif
ifeq ($(CONFIG_SIGALTSTACK_COROUTINE),y)
block-obj-$(CONFIG_POSIX) += coroutine-sigaltstack.o
-else
-block-obj-$(CONFIG_POSIX) += coroutine-gthread.o
endif
+ifeq ($(CONFIG_GTHREAD_COROUTINE),y)
+block-obj-$(CONFIG_POSIX) += coroutine-gthread.o
endif
block-obj-$(CONFIG_WIN32) += coroutine-win32.o
diff --git a/configure b/configure
index d9dfde0..9f7f5cd 100755
--- a/configure
+++ b/configure
@@ -3052,31 +3052,55 @@ fi
##########################################
# check and set a backend for coroutine
-# default is ucontext, but always fallback to gthread
-# windows autodetected by make
-if test "$coroutine" = "" -o "$coroutine" = "ucontext"; then
- if test "$darwin" != "yes"; then
- cat > $TMPC << EOF
+# We prefer ucontext, but it's not always possible. The fallback
+# is sigcontext. gthread is not selectable except explicitly, because
+# it is not functional enough to run QEMU proper. (It is occasionally
+# useful for debugging purposes.) On Windows the only valid backend
+# is the Windows-specific one.
+
+ucontext_works=no
+if test "$darwin" != "yes"; then
+ cat > $TMPC << EOF
#include <ucontext.h>
#ifdef __stub_makecontext
#error Ignoring glibc stub makecontext which will always fail
#endif
int main(void) { makecontext(0, 0, 0); return 0; }
EOF
- if compile_prog "" "" ; then
- coroutine_backend=ucontext
- else
- coroutine_backend=gthread
- fi
+ if compile_prog "" "" ; then
+ ucontext_works=yes
+ fi
+fi
+
+if test "$coroutine" = ""; then
+ if test "$mingw32" = "yes"; then
+ coroutine=windows
+ elif test "$ucontext_works" = "yes"; then
+ coroutine=ucontext
+ else
+ coroutine=sigaltstack
fi
-elif test "$coroutine" = "gthread" ; then
- coroutine_backend=gthread
-elif test "$coroutine" = "windows" ; then
- coroutine_backend=windows
-elif test "$coroutine" = "sigaltstack" ; then
- coroutine_backend=sigaltstack
else
- error_exit "unknown coroutine backend $coroutine"
+ case $coroutine in
+ windows)
+ if test "$mingw32" != "yes"; then
+ error_exit "'windows' coroutine backend only valid for Windows"
+ fi
+ ;;
+ ucontext)
+ if test "$ucontext_works" != "yes"; then
+ feature_not_found "ucontext"
+ fi
+ ;;
+ gthread|sigaltstack)
+ if test "$mingw32" = "yes"; then
+ error_exit "only the 'windows' coroutine backend is valid for Windows"
+ fi
+ ;;
+ *)
+ error_exit "unknown coroutine backend $coroutine"
+ ;;
+ esac
fi
##########################################
@@ -3383,7 +3407,7 @@ echo "OpenGL support $opengl"
echo "libiscsi support $libiscsi"
echo "build guest agent $guest_agent"
echo "seccomp support $seccomp"
-echo "coroutine backend $coroutine_backend"
+echo "coroutine backend $coroutine"
echo "GlusterFS support $glusterfs"
echo "virtio-blk-data-plane $virtio_blk_data_plane"
echo "gcov $gcov_tool"
@@ -3713,11 +3737,8 @@ if test "$rbd" = "yes" ; then
echo "CONFIG_RBD=y" >> $config_host_mak
fi
-if test "$coroutine_backend" = "ucontext" ; then
- echo "CONFIG_UCONTEXT_COROUTINE=y" >> $config_host_mak
-elif test "$coroutine_backend" = "sigaltstack" ; then
- echo "CONFIG_SIGALTSTACK_COROUTINE=y" >> $config_host_mak
-fi
+def="CONFIG_$(upper $coroutine)_COROUTINE"
+echo "$def=y" >> $config_host_mak
if test "$open_by_handle_at" = "yes" ; then
echo "CONFIG_OPEN_BY_HANDLE=y" >> $config_host_mak
--
1.7.9.5
^ permalink raw reply related [flat|nested] 6+ messages in thread