fix compile error no ARM platforms

* and some improvements

src/framework/CMakeLists.txt

@@ -43,8 +43,8 @@ SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO    "-O1 -ggdb")
 SET(CMAKE_C_FLAGS_RELWITHDEBINFO      "-O1 -ggdb")
 SET(CMAKE_CXX_FLAGS_RELEASE           "-O2 -ffast-math")
 SET(CMAKE_C_FLAGS_RELEASE             "-O2 -ffast-math")
-SET(CMAKE_CXX_FLAGS_RELFORPERFORMANCE "-Ofast")
-SET(CMAKE_C_FLAGS_RELFORPERFORMANCE   "-Ofast")
+SET(CMAKE_CXX_FLAGS_RELFORPERFORMANCE "-Ofast -fomit-frame-pointer")
+SET(CMAKE_C_FLAGS_RELFORPERFORMANCE   "-Ofast -fomit-frame-pointer")
 SET(CMAKE_CXX_FLAGS_RELFORSIZE        "-Os")
 SET(CMAKE_C_FLAGS_RELFORSIZE          "-Os")
 SET(CMAKE_CXX_LINK_FLAGS              "${CMAKE_CXX_LINK_FLAGS} -static-libgcc -static-libstdc++ -Wl,--as-needed")

src/framework/platform/unixcrashhandler.cpp

@@ -59,7 +59,7 @@ void crashHandler(int signum, siginfo_t* info, void* secret)
     ss << "     rsp = " << context.uc_mcontext.gregs[REG_RSP] << std::endl;
     ss << "     efl = " << context.uc_mcontext.gregs[REG_EFL] << std::endl;
     ss << std::endl;
-#else
+#elif defined(REG_EIP)
     ss << "  at eip = " << context.uc_mcontext.gregs[REG_EIP] << std::endl;
     ss << "     eax = " << context.uc_mcontext.gregs[REG_EAX] << std::endl;
     ss << "     ebx = " << context.uc_mcontext.gregs[REG_EBX] << std::endl;

src/framework/ui/uiwidgetimage.cpp

@@ -167,10 +167,6 @@ void UIWidget::drawImage(const Rect& screenCoords)
 
     m_imageTexture->setSmooth(m_imageSmooth);
 
-    // this will increase fps when rendering larger images, like the background, and improve image quality
-    if(m_imageSmooth && !m_imageTexture->hasMipmaps() && g_graphics.canGenerateMipmaps())
-        m_imageTexture->generateMipmaps();
-
     g_painter.setColor(m_imageColor);
     g_painter.drawTextureCoords(m_imageCoordsBuffer, m_imageTexture);
 }