[Qemu-devel] [PATCH 1/2] configure: Remove unneeded redirections of stderr (pkg-config --cflags, --libs)

[Qemu-devel] [PATCH 1/2] configure: Remove unneeded redirections of stderr (pkg-config --cflags, --libs)

[Stefan Weil]

For existing libraries, pkg-config --cflags and pkg-config --libs won't
print error messages to stderr, so redirecting stderr is not necessary.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
---
 configure |   36 ++++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/configure b/configure
index db69327..a47381c 100755
--- a/configure
+++ b/configure
@@ -1703,10 +1703,10 @@ if test "$gtk" != "no"; then
         fi
         gtk="no"
     else
-	gtk_cflags=`$pkg_config --cflags $gtkpackage 2>/dev/null`
-	gtk_libs=`$pkg_config --libs $gtkpackage 2>/dev/null`
-	vte_cflags=`$pkg_config --cflags $vtepackage 2>/dev/null`
-	vte_libs=`$pkg_config --libs $vtepackage 2>/dev/null`
+	gtk_cflags=`$pkg_config --cflags $gtkpackage`
+	gtk_libs=`$pkg_config --libs $gtkpackage`
+	vte_cflags=`$pkg_config --cflags $vtepackage`
+	vte_libs=`$pkg_config --libs $vtepackage`
 	libs_softmmu="$gtk_libs $vte_libs $libs_softmmu"
 	gtk="yes"
     fi
@@ -1908,8 +1908,8 @@ int main(void) {
 }
 EOF
   if $pkg_config libpng --modversion >/dev/null 2>&1; then
-    vnc_png_cflags=`$pkg_config libpng --cflags 2> /dev/null`
-    vnc_png_libs=`$pkg_config libpng --libs 2> /dev/null`
+    vnc_png_cflags=`$pkg_config libpng --cflags`
+    vnc_png_libs=`$pkg_config libpng --libs`
   else
     vnc_png_cflags=""
     vnc_png_libs="-lpng"
@@ -2240,8 +2240,8 @@ else
 fi
 if $pkg_config --atleast-version=$glib_req_ver gthread-2.0 > /dev/null 2>&1
 then
-    glib_cflags=`$pkg_config --cflags gthread-2.0 2>/dev/null`
-    glib_libs=`$pkg_config --libs gthread-2.0 2>/dev/null`
+    glib_cflags=`$pkg_config --cflags gthread-2.0`
+    glib_libs=`$pkg_config --libs gthread-2.0`
     LIBS="$glib_libs $LIBS"
     libs_qga="$glib_libs $libs_qga"
 else
@@ -2270,8 +2270,8 @@ if test "$pixman" = "none"; then
   pixman_cflags=
   pixman_libs=
 elif test "$pixman" = "system"; then
-  pixman_cflags=`$pkg_config --cflags pixman-1 2>/dev/null`
-  pixman_libs=`$pkg_config --libs pixman-1 2>/dev/null`
+  pixman_cflags=`$pkg_config --cflags pixman-1`
+  pixman_libs=`$pkg_config --libs pixman-1`
 else
   if test ! -d ${source_path}/pixman/pixman; then
     error_exit "pixman not present. Your options:" \
@@ -2591,8 +2591,8 @@ fi
 if test "$glusterfs" != "no" ; then
   if $pkg_config --atleast-version=3 glusterfs-api >/dev/null 2>&1; then
     glusterfs="yes"
-    glusterfs_cflags=`$pkg_config --cflags glusterfs-api 2>/dev/null`
-    glusterfs_libs=`$pkg_config --libs glusterfs-api 2>/dev/null`
+    glusterfs_cflags=`$pkg_config --cflags glusterfs-api`
+    glusterfs_libs=`$pkg_config --libs glusterfs-api`
     CFLAGS="$CFLAGS $glusterfs_cflags"
     libs_tools="$glusterfs_libs $libs_tools"
     libs_softmmu="$glusterfs_libs $libs_softmmu"
@@ -2961,8 +2961,8 @@ int main(void) { iscsi_unmap_sync(NULL,0,0,0,NULL,0); return 0; }
 EOF
   if $pkg_config --atleast-version=1.7.0 libiscsi --modversion >/dev/null 2>&1; then
     libiscsi="yes"
-    libiscsi_cflags=$($pkg_config --cflags libiscsi 2>/dev/null)
-    libiscsi_libs=$($pkg_config --libs libiscsi 2>/dev/null)
+    libiscsi_cflags=$($pkg_config --cflags libiscsi)
+    libiscsi_libs=$($pkg_config --libs libiscsi)
     CFLAGS="$CFLAGS $libiscsi_cflags"
     LIBS="$LIBS $libiscsi_libs"
   elif compile_prog "" "-liscsi" ; then
@@ -3084,8 +3084,8 @@ if test "$libusb" != "no" ; then
     if $pkg_config --atleast-version=1.0.13 libusb-1.0 >/dev/null 2>&1 ; then
         libusb="yes"
 	usb="libusb"
-        libusb_cflags=$($pkg_config --cflags libusb-1.0 2>/dev/null)
-        libusb_libs=$($pkg_config --libs libusb-1.0 2>/dev/null)
+        libusb_cflags=$($pkg_config --cflags libusb-1.0)
+        libusb_libs=$($pkg_config --libs libusb-1.0)
         QEMU_CFLAGS="$QEMU_CFLAGS $libusb_cflags"
         libs_softmmu="$libs_softmmu $libusb_libs"
     else
@@ -3100,8 +3100,8 @@ fi
 if test "$usb_redir" != "no" ; then
     if $pkg_config --atleast-version=0.6 libusbredirparser-0.5 >/dev/null 2>&1 ; then
         usb_redir="yes"
-        usb_redir_cflags=$($pkg_config --cflags libusbredirparser-0.5 2>/dev/null)
-        usb_redir_libs=$($pkg_config --libs libusbredirparser-0.5 2>/dev/null)
+        usb_redir_cflags=$($pkg_config --cflags libusbredirparser-0.5)
+        usb_redir_libs=$($pkg_config --libs libusbredirparser-0.5)
         QEMU_CFLAGS="$QEMU_CFLAGS $usb_redir_cflags"
         libs_softmmu="$libs_softmmu $usb_redir_libs"
     else
-- 
1.7.10.4

[Qemu-devel] [PATCH 2/2] configure: Remove unneeded redirections of stderr (pkg-config --exists)

[Stefan Weil]

Predicate options (--exists, --atleast-version, ...) of pkg-config dont't
print error messages to stderr, so redirecting stderr is not necessary.

Combining a predicate option with --modversion is not necessary for tests.
Instead of testing with --modversion, --exists can be used.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
---
 configure |   30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

diff --git a/configure b/configure
index a47381c..0315cf0 100755
--- a/configure
+++ b/configure
@@ -1469,7 +1469,7 @@ libs_softmmu="$libs_softmmu -lz"
 # libseccomp check
 
 if test "$seccomp" != "no" ; then
-    if $pkg_config --atleast-version=2.1.0 libseccomp --modversion >/dev/null 2>&1; then
+    if $pkg_config --atleast-version=2.1.0 libseccomp; then
         libs_softmmu="$libs_softmmu `$pkg_config --libs libseccomp`"
         QEMU_CFLAGS="$QEMU_CFLAGS `$pkg_config --cflags libseccomp`"
 	seccomp="yes"
@@ -1721,7 +1721,7 @@ if test "`basename $sdl_config`" != sdl-config && ! has ${sdl_config}; then
   sdl_config=sdl-config
 fi
 
-if $pkg_config sdl --modversion >/dev/null 2>&1; then
+if $pkg_config sdl --exists; then
   sdlconfig="$pkg_config sdl"
   _sdlversion=`$sdlconfig --modversion 2>/dev/null | sed 's/[^0-9]//g'`
 elif has ${sdl_config}; then
@@ -1907,7 +1907,7 @@ int main(void) {
     return png_ptr != 0;
 }
 EOF
-  if $pkg_config libpng --modversion >/dev/null 2>&1; then
+  if $pkg_config libpng --exists; then
     vnc_png_cflags=`$pkg_config libpng --cflags`
     vnc_png_libs=`$pkg_config libpng --libs`
   else
@@ -2186,7 +2186,7 @@ fi
 ##########################################
 # curl probe
 if test "$curl" != "no" ; then
-  if $pkg_config libcurl --modversion >/dev/null 2>&1; then
+  if $pkg_config libcurl --exists; then
     curlconfig="$pkg_config libcurl"
   else
     curlconfig=curl-config
@@ -2238,8 +2238,7 @@ if test "$mingw32" = yes; then
 else
     glib_req_ver=2.12
 fi
-if $pkg_config --atleast-version=$glib_req_ver gthread-2.0 > /dev/null 2>&1
-then
+if $pkg_config --atleast-version=$glib_req_ver gthread-2.0; then
     glib_cflags=`$pkg_config --cflags gthread-2.0`
     glib_libs=`$pkg_config --libs gthread-2.0`
     LIBS="$glib_libs $LIBS"
@@ -2370,8 +2369,7 @@ fi
 # libssh2 probe
 min_libssh2_version=1.2.8
 if test "$libssh2" != "no" ; then
-  if $pkg_config --atleast-version=$min_libssh2_version libssh2 >/dev/null 2>&1
-  then
+  if $pkg_config --atleast-version=$min_libssh2_version libssh2; then
     libssh2_cflags=`$pkg_config libssh2 --cflags`
     libssh2_libs=`$pkg_config libssh2 --libs`
     libssh2=yes
@@ -2589,14 +2587,14 @@ fi
 ##########################################
 # glusterfs probe
 if test "$glusterfs" != "no" ; then
-  if $pkg_config --atleast-version=3 glusterfs-api >/dev/null 2>&1; then
+  if $pkg_config --atleast-version=3 glusterfs-api; then
     glusterfs="yes"
     glusterfs_cflags=`$pkg_config --cflags glusterfs-api`
     glusterfs_libs=`$pkg_config --libs glusterfs-api`
     CFLAGS="$CFLAGS $glusterfs_cflags"
     libs_tools="$glusterfs_libs $libs_tools"
     libs_softmmu="$glusterfs_libs $libs_softmmu"
-    if $pkg_config --atleast-version=5 glusterfs-api >/dev/null 2>&1; then
+    if $pkg_config --atleast-version=5 glusterfs-api; then
       glusterfs_discard="yes"
     fi
   else
@@ -2959,7 +2957,7 @@ if test "$libiscsi" != "no" ; then
 #include <iscsi/iscsi.h>
 int main(void) { iscsi_unmap_sync(NULL,0,0,0,NULL,0); return 0; }
 EOF
-  if $pkg_config --atleast-version=1.7.0 libiscsi --modversion >/dev/null 2>&1; then
+  if $pkg_config --atleast-version=1.7.0 libiscsi; then
     libiscsi="yes"
     libiscsi_cflags=$($pkg_config --cflags libiscsi)
     libiscsi_libs=$($pkg_config --libs libiscsi)
@@ -3029,8 +3027,8 @@ int main(void) { spice_server_new(); return 0; }
 EOF
   spice_cflags=$($pkg_config --cflags spice-protocol spice-server 2>/dev/null)
   spice_libs=$($pkg_config --libs spice-protocol spice-server 2>/dev/null)
-  if $pkg_config --atleast-version=0.12.0 spice-server >/dev/null 2>&1 && \
-     $pkg_config --atleast-version=0.12.3 spice-protocol > /dev/null 2>&1 && \
+  if $pkg_config --atleast-version=0.12.0 spice-server && \
+     $pkg_config --atleast-version=0.12.3 spice-protocol && \
      compile_prog "$spice_cflags" "$spice_libs" ; then
     spice="yes"
     libs_softmmu="$libs_softmmu $spice_libs"
@@ -3065,7 +3063,7 @@ EOF
         test_cflags="-Werror $test_cflags"
     fi
     if test -n "$libtool" &&
-            $pkg_config --atleast-version=3.12.8 nss >/dev/null 2>&1 && \
+       $pkg_config --atleast-version=3.12.8 nss && \
       compile_prog "$test_cflags" "$libcacard_libs"; then
         smartcard_nss="yes"
         QEMU_CFLAGS="$QEMU_CFLAGS $libcacard_cflags"
@@ -3081,7 +3079,7 @@ fi
 
 # check for libusb
 if test "$libusb" != "no" ; then
-    if $pkg_config --atleast-version=1.0.13 libusb-1.0 >/dev/null 2>&1 ; then
+    if $pkg_config --atleast-version=1.0.13 libusb-1.0; then
         libusb="yes"
 	usb="libusb"
         libusb_cflags=$($pkg_config --cflags libusb-1.0)
@@ -3098,7 +3096,7 @@ fi
 
 # check for usbredirparser for usb network redirection support
 if test "$usb_redir" != "no" ; then
-    if $pkg_config --atleast-version=0.6 libusbredirparser-0.5 >/dev/null 2>&1 ; then
+    if $pkg_config --atleast-version=0.6 libusbredirparser-0.5; then
         usb_redir="yes"
         usb_redir_cflags=$($pkg_config --cflags libusbredirparser-0.5)
         usb_redir_libs=$($pkg_config --libs libusbredirparser-0.5)
-- 
1.7.10.4

Re: [Qemu-devel] [Qemu-trivial] [PATCH 1/2] configure: Remove unneeded redirections of stderr (pkg-config --cflags, --libs)

[Michael Tokarev]

27.08.2013 23:09, Stefan Weil wrote:
> For existing libraries, pkg-config --cflags and pkg-config --libs won't
> print error messages to stderr, so redirecting stderr is not necessary.
>
> Signed-off-by: Stefan Weil <sw@weilnetz.de>

Thanks, applied both to the trivial-patches queue.  A little good cleanup.

/mjt