Teach configure to run either qmake or cmake

Task-number: QTBUG-74139
Change-Id: I609ec4b3ef9f30455bd72aaebad0b6c766c39cd7
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

configure

@@ -42,18 +42,27 @@ outpath=`/bin/pwd`
 
 WHICH="which"
 
+PERL=
+findPerl()
+{
 PERL=`$WHICH perl 2>/dev/null`
+}
 
 # find out which awk we want to use, prefer gawk, then nawk, then regular awk
 AWK=
+findAwk()
+{
 for e in gawk nawk awk; do
     if "$WHICH" $e >/dev/null 2>&1 && ( $e -f /dev/null /dev/null ) >/dev/null 2>&1; then
         AWK=$e
         break
     fi
 done
+}
 
 # find a make command
+findMake()
+{
 if [ -z "$MAKE" ]; then
     MAKE=
     for mk in gmake make; do
@@ -70,20 +79,26 @@ if [ -z "$MAKE" ]; then
     # export MAKE, we need it later in the config.tests
     export MAKE
 fi
+}
 
 # make sure qmake is not confused by these. recursion via Makefiles would
 # be still affected, so just unsetting them here is not an option.
+checkQMakeEnv()
+{
 if [ -n "$QMAKESPEC" ] || [ -n "$XQMAKESPEC" ] || \
         [ -n "$QMAKEPATH" ] || [ -n "$QMAKEFEATURES" ]; then
     echo >&2 "Please make sure to unset the QMAKESPEC, XQMAKESPEC, QMAKEPATH,"
     echo >&2 "and QMAKEFEATURES environment variables prior to building Qt."
     exit 1
 fi
+}
 
 # do this early so we don't store it in config.status
 CFG_TOPLEVEL=
-relpathMangled=$relpath
 outpathPrefix=
+checkTopLevelBuild()
+{
+relpathMangled=$relpath
 if [ x"$1" = x"-top-level" ]; then
     CFG_TOPLEVEL=yes
     relpathMangled=`dirname "$relpath"`
@@ -95,9 +110,48 @@ else
         exit 1
     fi
 fi
+}
+
+CMAKE_CMDLINE=
+getCMakeCmdLine()
+{
+PASSTHRU=
+set -f  # suppress globbing in for loop
+SAVED_IFS=$IFS
+IFS='
+'
+for i in "$@"; do
+    if [ "$PASSTHRU" = "yes" ]; then
+        CMAKE_CMDLINE="$CMAKE_CMDLINE
+$i"
+    else
+        case $i in
+            --no-*)
+                VAR=`echo $i | sed 's,^--no-\(.*\),\1,'`
+                CMAKE_CMDLINE="$CMAKE_CMDLINE
+-DFEATURE_${VAR}=OFF"
+                ;;
+            -no-*)
+                VAR=`echo $i | sed 's,^-no-\(.*\),\1,'`
+                CMAKE_CMDLINE="$CMAKE_CMDLINE
+-DFEATURE_${VAR}=OFF"
+                ;;
+            --)
+                PASSTHRU=yes
+                ;;
+            *)
+                ;;
+        esac
+    fi
+done
+set +f
+IFS=$SAVED_IFS
+}
 
 OPT_CMDLINE=  # expanded version for the script
 QMAKE_CMDLINE=  # verbatim version for qmake call
+getOptAndQMakeCmdLines()
+{
 set -f  # suppress globbing in for loop
 SAVED_IFS=$IFS
 IFS='
@@ -132,6 +186,7 @@ for i in $OPT_CMDLINE; do
 done
 set +f
 IFS=$SAVED_IFS
+}
 
 #-------------------------------------------------------------------------------
 # utility functions
@@ -298,7 +353,8 @@ getQMakeConf()
 #-------------------------------------------------------------------------------
 # operating system detection
 #-------------------------------------------------------------------------------
-
+detectOperatingSystem()
+{
 # need that throughout the script
 UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
 UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown
@@ -312,11 +368,12 @@ if [ "$OSTYPE" = "msys" ]; then
     relpath=`(cd "$relpath"; pwd -W)`
     outpath=`pwd -W`
 fi
-
+}
 #-------------------------------------------------------------------------------
 # Verify Xcode installation on Mac OS
 #-------------------------------------------------------------------------------
-
+maybeVerifyXcode()
+{
 if [ "$BUILD_ON_MAC" = "yes" ]; then
     if ! /usr/bin/xcode-select --print-path >/dev/null 2>&1; then
         echo >&2
@@ -339,7 +396,7 @@ if [ "$BUILD_ON_MAC" = "yes" ]; then
         fi
     fi
 fi
-
+}
 #-----------------------------------------------------------------------------
 # Qt version detection
 #-----------------------------------------------------------------------------
@@ -347,6 +404,8 @@ QT_VERSION=
 QT_MAJOR_VERSION=
 QT_MINOR_VERSION=0
 QT_PATCH_VERSION=0
+detectQtVersion()
+{
 eval `sed -n -e 's/^MODULE_VERSION = \(\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*\)$/QT_VERSION=\1\
     QT_MAJOR_VERSION=\2\
     QT_MINOR_VERSION=\3\
@@ -356,7 +415,7 @@ if [ -z "$QT_MAJOR_VERSION" ]; then
    echo "Cannot proceed."
    exit 1
 fi
-
+}
 #-------------------------------------------------------------------------------
 # initalize variables
 #-------------------------------------------------------------------------------
@@ -372,11 +431,13 @@ OPT_VERBOSE=no
 OPT_HELP=
 CFG_SILENT=no
 CFG_DEV=no
+BUILD_WITH_CMAKE=no
 
 #-------------------------------------------------------------------------------
 # parse command line arguments
 #-------------------------------------------------------------------------------
-
+parseCommandline()
+{
 # parse the arguments, setting things to "yes" or "no"
 while [ "$#" -gt 0 ]; do
     CURRENT_OPT="$1"
@@ -523,6 +584,9 @@ while [ "$#" -gt 0 ]; do
         # need to keep this here, to ensure qmake is built silently
         CFG_SILENT="$VAL"
         ;;
+    cmake)
+        BUILD_WITH_CMAKE=yes
+        ;;
     *)
         ;;
     esac
@@ -532,11 +596,12 @@ while [ "$#" -gt 0 ]; do
     fi
 done
 [ "x$ERROR" = "xyes" ] && exit 1
-
+}
 #-------------------------------------------------------------------------------
 # help - interactive parts of the script _after_ this section please
 #-------------------------------------------------------------------------------
-
+handleHelp()
+{
 if [ "$OPT_HELP" = "yes" ]; then
     cat $relpath/config_help.txt
     if [ -n "$CFG_TOPLEVEL" ]; then
@@ -551,12 +616,13 @@ if [ "$OPT_HELP" = "yes" ]; then
     fi
     exit 0
 fi
-
+}
 #-------------------------------------------------------------------------------
 # platform detection
 #-------------------------------------------------------------------------------
-
 PLATFORM_NOTES=
+detectPlatform()
+{
 if [ -z "$PLATFORM" ]; then
     case "$UNAME_SYSTEM:$UNAME_RELEASE" in
      Darwin:*)
@@ -622,11 +688,13 @@ if [ -z "$PLATFORM" ]; then
     esac
 fi
 echo "$PLATFORM_NOTES" > "${outpathPrefix}.config.notes"
+}
 
 #-------------------------------------------------------------------------------
 # command line and environment validation
 #-------------------------------------------------------------------------------
-
+validateEnv()
+{
 if [ -d "$PLATFORM" ]; then
   QMAKESPEC="$PLATFORM"
 else
@@ -656,11 +724,12 @@ if [ '!' -d "$QMAKESPEC" ]; then
     echo
     exit 2
 fi
-
+}
 #-------------------------------------------------------------------------------
 # build tree initialization
 #-------------------------------------------------------------------------------
-
+initBuildTree()
+{
 # is this a shadow build?
 if [ "$OPT_SHADOW" = "maybe" ]; then
     OPT_SHADOW=no
@@ -688,22 +757,7 @@ if [ "$OPT_SHADOW" = "yes" ]; then
 
     mkdir -p "$outpath/mkspecs"
 fi
-
+}
-# -----------------------------------------------------------------------------
-# build qmake
-# -----------------------------------------------------------------------------
-
-# symlink includes
-if [ -e "$relpath/.git" ]; then
-    if [ -z "$PERL" ]; then
-        echo
-        echo "You need perl in your PATH to make a build from GIT."
-        echo "Cannot proceed."
-        exit 1
-    fi
-
-    "$relpath/bin/syncqt.pl" -version $QT_VERSION -minimal -module QtCore "$relpath" || exit 1
-fi
 
 # $1: input variable name (awk regexp)
 # $2: optional output variable name
@@ -715,6 +769,23 @@ setBootstrapVariable()
     getQMakeConf "$1" | echo ${2-$1} = `if [ -n "$3" ]; then sed "$3"; else cat; fi` >> "$mkfile"
 }
 
+# -----------------------------------------------------------------------------
+# build qmake
+# -----------------------------------------------------------------------------
+
+buildQMake()
+{
+# symlink includes
+if [ -e "$relpath/.git" ]; then
+    if [ -z "$PERL" ]; then
+        echo
+        echo "You need perl in your PATH to make a build from GIT."
+        echo "Cannot proceed."
+        exit 1
+    fi
+
+    "$relpath/bin/syncqt.pl" -version $QT_VERSION -minimal -module QtCore "$relpath" || exit 1
+fi
 # build qmake
     echo "Creating qmake..."
     mkdir -p "$outpath/qmake" || exit
@@ -813,11 +884,14 @@ setBootstrapVariable()
         fi
         echo "Done."
     fi
+}
 
 #-------------------------------------------------------------------------------
 # create a qt.conf for the Qt build tree itself
 #-------------------------------------------------------------------------------
 
+createQtConf()
+{
 # Note that this file is just sufficient to boot configure, by which it is
 # replaced in-place with a version which is suitable for building all of Qt.
 QTCONFFILE="$outpath/bin/qt.conf"
@@ -834,11 +908,13 @@ if [ x"$relpath" != x"$outpath" ]; then
 Prefix=$relpath
 EOF
 fi
+}
 
 #-------------------------------------------------------------------------------
 # configure and build top-level makefile
 #-------------------------------------------------------------------------------
-
+createToplevelMakefile()
+{
 # recreate command line for qmake
 set -f
 SAVED_IFS=$IFS
@@ -859,3 +935,42 @@ if [ -n "$CFG_HOST_QT_TOOLS_PATH" ]; then
 else
     "$outpath/bin/qmake" "$relpathMangled" -- "$@"
 fi
+}
+
+runCMake()
+{
+# recreate command line for cmake
+set -f
+SAVED_IFS=$IFS
+IFS='
+'
+for i in $CMAKE_CMDLINE; do
+    set -- $* "$i"
+done
+set +f
+IFS=$SAVED_IFS
+cmake $* "$relpath"
+}
+
+parseCommandline $@
+handleHelp
+if [ "$BUILD_WITH_CMAKE" = "yes" ]; then
+    getCMakeCmdLine $@
+    runCMake
+else
+    findPerl
+    findAwk
+    findMake
+    checkQMakeEnv
+    checkTopLevelBuild
+    getOptAndQMakeCmdLines $@
+    detectOperatingSystem
+    maybeVerifyXcode
+    detectQtVersion
+    detectPlatform
+    validateEnv
+    initBuildTree
+    buildQMake
+    createQtConf
+    createToplevelMakefile
+fi