--- a/coregrind/vg_preloaded.c
+++ b/coregrind/vg_preloaded.c
@@ -56,7 +56,7 @@
 void VG_NOTIFY_ON_LOAD(freeres)( void );
 void VG_NOTIFY_ON_LOAD(freeres)( void )
 {
-#  if !defined(__UCLIBC__) \
+#  if !defined(__UCLIBC__) && defined(__GLIBC__) \
    && !defined(VGPV_arm_linux_android) && !defined(VGPV_x86_linux_android) \
    && !defined(VGPV_mips32_linux_android)
    extern void __libc_freeres(void);
--- a/include/pub_tool_redir.h
+++ b/include/pub_tool_redir.h
@@ -241,7 +241,7 @@
 /* --- Soname of the standard C library. --- */
 
 #if defined(VGO_linux)
-#  define  VG_Z_LIBC_SONAME  libcZdsoZa              // libc.so*
+#  define  VG_Z_LIBC_SONAME  libcZdZa                // libc.*
 
 #elif defined(VGO_darwin) && (DARWIN_VERS <= DARWIN_10_6)
 #  define  VG_Z_LIBC_SONAME  libSystemZdZaZddylib    // libSystem.*.dylib
@@ -273,7 +273,11 @@
 /* --- Soname of the pthreads library. --- */
 
 #if defined(VGO_linux)
+# if defined(__GLIBC__) || defined(__UCLIBC__)
 #  define  VG_Z_LIBPTHREAD_SONAME  libpthreadZdsoZd0     // libpthread.so.0
+# else
+#  define  VG_Z_LIBPTHREAD_SONAME  libcZdZa              // libc.*
+# endif
 #elif defined(VGO_darwin)
 #  define  VG_Z_LIBPTHREAD_SONAME  libSystemZdZaZddylib  // libSystem.*.dylib
 #else
--- a/configure.ac
+++ b/configure.ac
@@ -1025,8 +1025,6 @@ case "${GLIBC_VERSION}" in
 
      *)
 	AC_MSG_RESULT([unsupported version ${GLIBC_VERSION}])
-	AC_MSG_ERROR([Valgrind requires glibc version 2.2 - 2.19])
-	AC_MSG_ERROR([or Darwin or Bionic libc])
 	;;
 esac
 
