@@ -17,18 +17,19 @@
 AC_LANG([Objective C++])
 AC_PROG_OBJCXX(clang++ g++)
 AC_PROG_OBJCXXCPP
 AC_PROG_LN_S
 AC_PROG_INSTALL
+AC_PROG_EGREP
 
 CPP="$OBJCXXCPP"
 CPPFLAGS="$CPPFLAGS $OBJCPPFLAGS $($OBJFW_CONFIG --cppflags)"
 OBJCFLAGS="$OBJCFLAGS -Wall $($OBJFW_CONFIG --objcflags)"
 LDFLAGS="$LDFLAGS $($OBJFW_CONFIG --ldflags --rpath)"
 LIBS="$LIBS $($OBJFW_CONFIG --libs)"
 
-AX_CHECK_COMPILER_FLAGS(-std=c++11, [CXXFLAGS="$CXXFLAGS -std=c++11"], [
+AX_CHECK_COMPILER_FLAGS(-std=c++11, [OBJCXXFLAGS="$OBJCXXFLAGS -std=c++11"], [
 	AC_MSG_ERROR(You need a compiler that supports C++11!)
 ])
 
 AX_CHECK_COMPILER_FLAGS(-pipe, [OBJCFLAGS="$OBJCFLAGS -pipe"])
 AX_CHECK_COMPILER_FLAGS(-fno-common, [OBJCFLAGS="$OBJCFLAGS -fno-common"])
@@ -85,10 +86,24 @@
 	AC_MSG_ERROR(You need Qt5Widgets >= 5.5 installed!)
 ])
 AS_IF([test x"$GOBJC" = x"yes"], [
 	OBJCFLAGS="$OBJCFLAGS -Wwrite-strings -Wpointer-arith -Werror"
 ])
+
+AC_MSG_CHECKING(whether Qt requires PIC)
+AC_EGREP_CPP(yes, [
+	#include <qglobal.h>
+
+	#ifdef QT_REDUCE_RELOCATIONS
+	yes
+	#endif
+], [
+	OBJCXXFLAGS="$LIB_CFLAGS $OBJCXXFLAGS"
+	AC_MSG_RESULT(yes)
+], [
+	AC_MSG_RESULT(no)
+])
 
 BUILDSYS_INIT
 
 dnl We don't call AC_PROG_CPP or AC_PROG_OBJC, but only AC_PROG_OBJCPPCXX and
 dnl set CPP and OBJCC to OBJCPPCXX and add OBJCXXCPPFLAGS to CPPFLAGS, thus we