qmake: fix ios project display in qtcreator

qtc validates projects first. if error occurs, visual items after error
can not be displayed in qtc
ios MAKEFILE_GENERATOR is XCODE(why) which not supported by configure.prf
and error() is called, so qtc displayed nothing

QtAV.pro

@@ -23,7 +23,7 @@ greaterThan(QT_MAJOR_VERSION, 4) {
   SUBDIRS += examples
   examples.depends += libqtav
 }
-!android:!no-tests {
+!cross_compile:!no-tests {
   SUBDIRS += tests
   tests.depends += libqtav libqtavwidgets
 }
@@ -42,7 +42,14 @@ OptionalDepends = \
     avresample \
     avdevice
 # QtOpenGL module. In Qt5 we can disable it and still have opengl support
-!no-gl:!no-widgets: OptionalDepends *= gl
+!no-gl:!no-widgets {
+  greaterThan(QT_MAJOR_VERSION, 4):qtHaveModule(opengl):!config_gl {
+    GL=config_gl done_config_gl
+    cache(CONFIG, add, GL)
+  } else {
+    OptionalDepends *= gl #ios require code sign
+  }
+}
 !no-avfilter: OptionalDepends *= avfilter
 ## sse2 sse4_1 may be defined in Qt5 qmodule.pri but is not included. Qt4 defines sse and sse2
 !no-sse4_1:!sse4_1: OptionalDepends *= sse4_1

configure.pri

@@ -11,6 +11,7 @@
 QMAKE_CONFIG_LOG = $$dirname(_QMAKE_CACHE_QT4_)/config.log
 QMAKE_CONFIG_TESTS_DIR = $$_PRO_FILE_PWD_/config.tests
 
+lessThan(QT_MAJOR_VERSION, 5) {
 defineTest(cache) {
     !isEmpty(4): error("cache(var, [set|add|sub] [transient] [super], [srcvar]) requires one to three arguments.")
     !exists($$_QMAKE_CACHE_QT4_) {
@@ -54,8 +55,11 @@ defineTest(cache) {
     }
     write_file($$_QMAKE_CACHE_QT4_, varstr, append)
 }
-
-equals(MAKEFILE_GENERATOR, UNIX) {
+} #Qt4
+QMAKE_MAKE = $$(MAKE)
+!isEmpty(QMAKE_MAKE) {
+    # We were called recursively. Use the right make, as MAKEFLAGS may be set as well.
+} equals(MAKEFILE_GENERATOR, UNIX) {
     QMAKE_MAKE = make
 } else:equals(MAKEFILE_GENERATOR, MINGW) {
     !equals(QMAKE_HOST.os, Windows): \
@@ -65,7 +69,8 @@ equals(MAKEFILE_GENERATOR, UNIX) {
 } else:if(equals(MAKEFILE_GENERATOR, MSVC.NET)|equals(MAKEFILE_GENERATOR, MSBUILD)) {
     QMAKE_MAKE = nmake
 } else {
-    error("Configure tests are not supported with the $$MAKEFILE_GENERATOR Makefile generator.")
+# error: the reset qmake will not work and displays nothing in qtc
+    warning("Configure tests are not supported with the $$MAKEFILE_GENERATOR Makefile generator.")
 }
 
 defineTest(qtRunLoggedCommand) {

root.pri

@@ -15,7 +15,7 @@ message("BUILD_DIR=$$BUILD_DIR")
 greaterThan(QT_MAJOR_VERSION, 4) {
     mkspecs_build = $$[QMAKE_SPEC]
     #recheck:write_file($$BUILD_DIR/.qmake.cache) #FIXME: empty_file result in no qtCompileTest result in cache
-    load(configure)
+    #load(configure) # why MAKEFILE_GENERATOR is detected as XCODE in qtc before running qmake?
 } else {
     mkspecs_build = $$[QMAKE_MKSPECS]
     _QMAKE_CACHE_QT4_ = $$_QMAKE_CACHE_
@@ -24,6 +24,13 @@ greaterThan(QT_MAJOR_VERSION, 4) {
         _QMAKE_CACHE_QT4_=$$BUILD_DIR/.qmake.cache
     }
     include(common.pri)
+}
+SUPPORTED_MAKEFILE_GENERATOR = UNIX MINGW MSVC.NET MSBUILD
+message(MAKEFILE_GENERATOR=$$MAKEFILE_GENERATOR)
+greaterThan(QT_MAJOR_VERSION, 4):contains(SUPPORTED_MAKEFILE_GENERATOR, $$MAKEFILE_GENERATOR) {
+#configure.prf error if makefile generator is not supported and no display in qtcreator
+    load(configure)
+} else {
     #recheck:write_file($$BUILD_DIR/.qmake.cache) #FIXME: empty_file result in no qtCompileTest result in cache
     #use the following lines when building as a sub-project, write cache to this project src dir.
     #if build this project alone and do not have sub-project depends on this lib, those lines are not necessary