Record the sub-architecture (CPU features enabled in the compiler)

If the system's compiler has extra features on top of the base
settings enabled or if the mkspec or $CXXFLAGS variable included some,
record them.

This will allow us to choose whether or not to use our own special
compilers, based on whether the system default compiler contains it or
not.

Change-Id: I87cada9fab4cfa58846a831d0a7c7b50d8fa87fd
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

1 files changed, 12 insertions, 6 deletions

diff --git a/configure b/configure
index 52413f12fe..c8f615888c 100755
--- a/configure
+++ b/configure
@@ -708,8 +708,10 @@ CFG_PKGCONFIG=auto
 
 # Target architecture
 CFG_ARCH=
+CFG_CPUFEATURES=
 # Host architecture, same as CFG_ARCH when not cross-compiling
 CFG_HOST_ARCH=
+CFG_HOST_CPUFEATURES=
 # Set when the -arch or -host-arch arguments are used
 OPT_OBSOLETE_HOST_ARG=no
 
@@ -3668,9 +3670,9 @@ fi
 
 # Use config.tests/arch/arch.pro to has the compiler tell us what the target architecture is
 OUTFILE=$outpath/arch.result
-"$unixtests/arch.test" "$XQMAKESPEC" $OPT_VERBOSE "$relpath" "$outpath" "$OUTFILE"
+"$unixtests/arch.test" "$XQMAKESPEC" $OPT_VERBOSE "$relpath" "$outpath" "$OUTFILE" "CFG"
 if [ $? -eq 0 ]; then
-    CFG_ARCH=`cat "$OUTFILE"`
+    eval `cat "$OUTFILE"`
 else
     echo
     echo "Could not determine the target architecture!"
@@ -3681,9 +3683,9 @@ rm -f "$OUTFILE" 2>/dev/null
 
 if [ "$QMAKESPEC" != "$XQMAKESPEC" ]; then
     # Do the same test again, using the host compiler
-    SYSROOT_FLAG= "$unixtests/arch.test" "$QMAKESPEC" $OPT_VERBOSE "$relpath" "$outpath" "$OUTFILE"
+    SYSROOT_FLAG= "$unixtests/arch.test" "$QMAKESPEC" $OPT_VERBOSE "$relpath" "$outpath" "$OUTFILE" "CFG_HOST"
     if [ $? -eq 0 ]; then
-        CFG_HOST_ARCH=`cat "$OUTFILE"`
+        eval `cat "$OUTFILE"`
     else
         echo
         echo "Could not determine the host architecture!"
@@ -3694,6 +3696,7 @@ if [ "$QMAKESPEC" != "$XQMAKESPEC" ]; then
 else
     # not cross compiling, host == target
     CFG_HOST_ARCH="$CFG_ARCH"
+    CFG_HOST_CPUFEATURES="$CFG_CPUFEATURES"
 fi
 unset OUTFILE
 
@@ -5719,6 +5722,8 @@ cat >>"$QTCONFIG.tmp" <<EOF
 CONFIG += $QTCONFIG_CONFIG
 QT_ARCH = $CFG_ARCH
 QT_HOST_ARCH = $CFG_HOST_ARCH
+QT_CPU_FEATURES = $CFG_CPUFEATURES
+QT_HOST_CPU_FEATURES = $CFG_HOST_CPUFEATURES
 QT_EDITION = $Edition
 QT_CONFIG += $QT_CONFIG
 
@@ -5882,8 +5887,9 @@ else
     echo "Building for:  $XPLATFORM"
 fi
 
-echo "Architecture:  $CFG_ARCH"
-echo "Host architecture: $CFG_HOST_ARCH"
+# the missing space before $CFG_FEATURES is intentional
+echo "Architecture:  $CFG_ARCH, features:$CFG_CPUFEATURES"
+echo "Host architecture: $CFG_HOST_ARCH, features:$CFG_HOST_CPUFEATURES"
 
 if [ -n "$PLATFORM_NOTES" ]; then
     echo "Platform notes:"