Apparently Android is something like newlib.

src/Magnum/Math/Complex.h

@@ -339,8 +339,8 @@ template<class T> class Complex {
          * @see isNormalized()
          */
         T length() const {
-            /** @todo Remove when NaCl's newlib has this fixed */
-            #ifndef CORRADE_TARGET_NACL_NEWLIB
+            /** @todo Remove when newlib has this fixed */
+            #if !defined(CORRADE_TARGET_NACL_NEWLIB) && !defined(CORRADE_TARGET_ANDROID)
             return std::hypot(_real, _imaginary);
             #else
             return std::sqrt(dot());

src/Magnum/Math/Functions.h

@@ -251,7 +251,8 @@ template<std::size_t size, class T> Vector<size, T> floor(const Vector<size, T>&
 template<class T> inline T round(const T& a);
 #else
 template<class T> inline typename std::enable_if<std::is_arithmetic<T>::value, T>::type round(T a) {
-    #ifndef CORRADE_TARGET_NACL_NEWLIB
+    /** @todo Remove when newlib has this fixed */
+    #if !defined(CORRADE_TARGET_NACL_NEWLIB) && !defined(CORRADE_TARGET_ANDROID)
     return std::round(a);
     #else
     return (a > T(0)) ? std::floor(a + T(0.5)) : std::ceil(a - T(0.5));
@@ -260,7 +261,7 @@ template<class T> inline typename std::enable_if<std::is_arithmetic<T>::value, T
 template<std::size_t size, class T> Vector<size, T> round(const Vector<size, T>& a) {
     Vector<size, T> out;
     for(std::size_t i = 0; i != size; ++i) {
-        #ifndef CORRADE_TARGET_NACL_NEWLIB
+        #if !defined(CORRADE_TARGET_NACL_NEWLIB) && !defined(CORRADE_TARGET_ANDROID)
         out[i] = std::round(a[i]);
         #else
         out[i] = round(a[i]);
@@ -396,8 +397,8 @@ Computes and returns @f$ ab + c @f$.
 template<class T> inline T fma(const T& a, const T& b, const T& c);
 #else
 template<class T> inline typename std::enable_if<std::is_arithmetic<T>::value, T>::type fma(T a, T b, T c) {
-    /** @todo Remove when NaCl's newlib has this fixed */
-    #ifndef CORRADE_TARGET_NACL_NEWLIB
+    /** @todo Remove when newlib has this fixed */
+    #if !defined(CORRADE_TARGET_NACL_NEWLIB) && !defined(CORRADE_TARGET_ANDROID)
     return std::fma(a, b, c);
     #else
     return a*b + c;

src/Magnum/Shader.cpp

@@ -36,7 +36,7 @@
 #include "Implementation/State.h"
 #include "Implementation/ShaderState.h"
 
-#if defined(CORRADE_TARGET_NACL_NEWLIB) || defined(__MINGW32__)
+#if defined(CORRADE_TARGET_NACL_NEWLIB) || defined(CORRADE_TARGET_ANDROID) || defined(__MINGW32__)
 #include <sstream>
 #endif
 
@@ -593,7 +593,8 @@ std::vector<std::string> Shader::sources() const { return _sources; }
 
 Shader& Shader::addSource(std::string source) {
     if(!source.empty()) {
-        #if defined(CORRADE_TARGET_NACL_NEWLIB) || defined(__MINGW32__)
+        /** @todo Remove when newlib has this fixed (also the include above) */
+        #if defined(CORRADE_TARGET_NACL_NEWLIB) || defined(CORRADE_TARGET_ANDROID) || defined(__MINGW32__)
         std::ostringstream converter;
         converter << (_sources.size()+1)/2;
         #endif
@@ -601,7 +602,7 @@ Shader& Shader::addSource(std::string source) {
         /* Fix line numbers, so line 41 of third added file is marked as 3(41).
            Source 0 is the #version string added in constructor. */
         _sources.push_back("#line 1 " +
-            #if !defined(CORRADE_TARGET_NACL_NEWLIB) && !defined(__MINGW32__)
+            #if !defined(CORRADE_TARGET_NACL_NEWLIB) && !defined(CORRADE_TARGET_ANDROID) && !defined(__MINGW32__)
             std::to_string((_sources.size()+1)/2) +
             #else
             converter.str() +