Misc small fixes for Android builds (2020-04-02) (CleverRaven#39168)

* Only build experimental flavor on Travis

* Guard unused function in Android builds

* Ignore pragmas unknown to Android compiler

build-scripts/build.sh

@@ -146,7 +146,7 @@ then
     cd android
     # Specify dumb terminal to suppress gradle's constatnt output of time spent building, which
     # fills the log with nonsense.
-    TERM=dumb ./gradlew assembleRelease -Pj=$num_jobs -Plocalize=false -Pabi_arm_32=false -Pabi_arm_64=true -Pdeps=/home/travis/build/CleverRaven/Cataclysm-DDA/android/app/deps.zip
+    TERM=dumb ./gradlew assembleExperimentalRelease -Pj=$num_jobs -Plocalize=false -Pabi_arm_32=false -Pabi_arm_64=true -Pdeps=/home/travis/build/CleverRaven/Cataclysm-DDA/android/app/deps.zip
 else
     make -j "$num_jobs" RELEASE=1 CCACHE=1 BACKTRACE=1 CROSS="$CROSS_COMPILATION" LINTJSON=0
 

src/debug.cpp

@@ -970,7 +970,7 @@ std::string game_info::operating_system()
 #endif
 }
 
-#if !defined(__CYGWIN__) && ( defined (__linux__) || defined(unix) || defined(__unix__) || defined(__unix) || ( defined(__APPLE__) && defined(__MACH__) ) || defined(BSD) ) // linux; unix; MacOs; BSD
+#if !defined(__CYGWIN__) && !defined (__ANDROID__) && ( defined (__linux__) || defined(unix) || defined(__unix__) || defined(__unix) || ( defined(__APPLE__) && defined(__MACH__) ) || defined(BSD) ) // linux; unix; MacOs; BSD
 /** Execute a command with the shell by using `popen()`.
  * @param command The full command to execute.
  * @note The output buffer is limited to 512 characters.

src/lightmap.cpp

@@ -1242,6 +1242,7 @@ float fastexp( float x )
         int i;
     } u, v;
 #pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunknown-pragmas"
 #pragma GCC diagnostic ignored "-Wpragmas"
 #pragma GCC diagnostic ignored "-Wimplicit-int-float-conversion"
     u.i = static_cast<long long>( 6051102 * x + 1056478197 );