diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7e8777fa..de68a52d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1240,3 +1240,10 @@ if (ANDROID AND MOBILEGL_BUILD_EXTMEM_PROBE)
         endif()
     endif()
 endif()
+
+# The GBM library carries the tree's logger, which reaches Android's own log.  The main target gets
+# these libraries in its own Android block; a library built from the same sources needs them for the
+# same reason, and without them it is the LINK that fails rather than anything in the code.
+if (ANDROID)
+    target_link_libraries(MobileGLGbm PRIVATE log android)
+endif()
diff --git a/MobileGL/MG_Gbm/GbmDevice.cpp b/MobileGL/MG_Gbm/GbmDevice.cpp
index abfb4eba..e4126fc3 100644
--- a/MobileGL/MG_Gbm/GbmDevice.cpp
+++ b/MobileGL/MG_Gbm/GbmDevice.cpp
@@ -30,6 +30,7 @@
 #include <fcntl.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
+#include <sys/syscall.h>
 #include <unistd.h>
 
 #include <cerrno>
@@ -139,7 +140,15 @@ namespace MobileGL::MG_Gbm
                              device.HeapPath.c_str(), alignedSize, heapErrno, strerror(heapErrno));
             }
 
+#if defined(__ANDROID__) && __ANDROID_API__ < 30
+            // BIONIC ONLY DECLARES memfd_create FROM API 30, and this library builds against 26.
+            // The kernel call is far older than the declaration - it has been there since 3.17 - so
+            // asking for it by number is not a workaround for a missing feature, it is the same call
+            // with the name the headers of this API level do not carry yet.
+            const Int fd = static_cast<Int>(::syscall(__NR_memfd_create, "mobilegl-gbm", MFD_CLOEXEC));
+#else
             const Int fd = memfd_create("mobilegl-gbm", MFD_CLOEXEC);
+#endif
             if (fd < 0)
             {
                 MGLOG_E_ONCE("gbm: memfd_create failed (%d: %s) and no dma-heap node is usable, so no "