Index: configure
--- configure.orig	2025-07-16 08:22:04.000000000 +0200
+++ configure	2025-07-17 08:51:44.045416000 +0200
@@ -5645,10 +5645,7 @@
 then :
 
 else $as_nop
-  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
-See \`config.log' for more details" "$LINENO" 5; }
+    :
 fi
 
 ac_ext=c
@@ -29364,7 +29361,7 @@
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-l"$LDAPLIBNAME"  $LIBS"
+LIBS="-l$LDAPLIBNAME  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -29408,7 +29405,7 @@
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-l"$LDAPLIBNAME" -l$LBERLIBNAME $LIBS"
+LIBS="-l$LDAPLIBNAME -l$LBERLIBNAME $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -29458,7 +29455,7 @@
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-l"$LDAPLIBNAME"  $LIBS"
+LIBS="-l$LDAPLIBNAME  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -29664,7 +29661,7 @@
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-l"$LBERLIBNAME"  $LIBS"
+LIBS="-l$LBERLIBNAME  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -29698,7 +29695,7 @@
 #define `printf "%s\n" "HAVE_LIB"$LBERLIBNAME"" | $as_tr_cpp` 1
 _ACEOF
 
-  LIBS="-l"$LBERLIBNAME" $LIBS"
+  LIBS="-l$LBERLIBNAME $LIBS"
 
 else $as_nop
 
Index: lib/vtls/openssl.c
--- lib/vtls/openssl.c.orig	2025-07-16 08:22:04.000000000 +0200
+++ lib/vtls/openssl.c	2025-07-17 08:50:40.058192000 +0200
@@ -127,6 +127,9 @@
      !defined(OPENSSL_IS_BORINGSSL))
   #define HAVE_SSL_CTX_SET_DEFAULT_READ_BUFFER_LEN 1
 #endif
+#if defined(HAVE_ENGINE_LOAD_BUILTIN_ENGINES)
+#include <openssl/engine.h>
+#endif
 
 #include "../curlx/warnless.h"