--- tpm2-pkcs11-1.8.0/configure.ac.orig	2022-03-21 14:07:16.000000000 +0100
+++ tpm2-pkcs11-1.8.0/configure.ac	2022-07-02 08:12:45.167023531 +0200
@@ -540,7 +540,7 @@ and submitting patches upstream!])
 # Rather than nesting these and making them ugly just use a counter.
 AX_CHECK_COMPILE_FLAG([-fdata-sections], [strip=y])
 AX_CHECK_COMPILE_FLAG([-ffunction-sections], [strip="y$strip"])
-AX_CHECK_LINK_FLAG([[-Wl,--gc-sections]], [strip+="y$strip"])
+AX_CHECK_LINK_FLAG([[-Wl,--gc-sections]], [strip="y$strip"])
 
 AS_IF([test x"$strip" = xyyy], [
   EXTRA_CFLAGS="$EXTRA_CFLAGS -fdata-sections -ffunction-sections"