Global (Android): fixes building on old API level

src/common/android/dex.c

@@ -598,7 +598,7 @@ const char* ffDexStaticInts(const char* jarPath, const FFDexStaticIntRequest* re
     [[gnu::cleanup(wrapDexMapping)]] FFDexMapping mapping = {};
 
     {
-        FF_AUTO_CLOSE_FD const int fd = open(jarPath, O_RDONLY | O_CLOEXEC);
+        FF_AUTO_CLOSE_FD int fd = open(jarPath, O_RDONLY | O_CLOEXEC);
         if (fd < 0) {
             FF_DEBUG("open(%s) failed: %s", jarPath, strerror(errno));
             return "open(jar) failed";

src/common/impl/io_unix.c

@@ -17,7 +17,7 @@
 
 #if FF_HAVE_WORDEXP
     #include <wordexp.h>
-#else
+#elif FF_HAVE_GLOB
     #include <glob.h>
 #endif
 
@@ -112,7 +112,7 @@ bool ffPathExpandEnv(const char* in, FFstrbuf* out) {
 
     wordfree(&exp);
 
-#else
+#elif FF_HAVE_GLOB
 
     glob_t gb;
     if (glob(in, GLOB_NOSORT
@@ -134,6 +134,10 @@ bool ffPathExpandEnv(const char* in, FFstrbuf* out) {
 
     globfree(&gb);
 
+#else
+
+    FF_UNUSED(in, out)
+
 #endif
 
     return result;

src/detection/opengl/opengl_linux.c

@@ -6,8 +6,11 @@
 #include <string.h>
 
 #if __ANDROID__ && !defined(FF_HAVE_EGL)
-    // On Android, installing OpenGL headers is enough (mesa-dev)
-    #if __has_include(<EGL/egl.h>)
+    // On Android the EGL headers ship with the NDK, but the desktop GL ones only come from mesa-dev,
+    // which a plain NDK build does not have. The block below includes <GL/gl.h>, so that is the
+    // header to probe: probing <EGL/egl.h> turns this on for every NDK build and then fails to
+    // compile. Termux installs mesa-dev, so it still gets the EGL path.
+    #if __has_include(<EGL/egl.h>) && __has_include(<GL/gl.h>)
         #define FF_HAVE_EGL 1
     #endif
 #endif