package/tpm2-tss: fix build without C++

C++ is required only for the fuzzing tests but AC_PROG_CXX is included
by configure.ac even when fuzzing is not enabled (which we don't do on
Buildroot).

The patch applied upstream had issues and was reverted[1]. Use a local
patch to solve the problem temporaryly.

Fixes:
    http://autobuild.buildroot.net/results/13f5e37b47b255da4158bec34e5459136f7e60d4
    http://autobuild.buildroot.net/results/1c26db2509c79e00c0de1165945277eaa57b149f
    http://autobuild.buildroot.net/results/b7b6b7b7aca79e847b442cbd2305427d91fe5d70
    http://autobuild.buildroot.net/results/1cd5a82a0e799aa5027e2e2c03b246332cc3a15d
    http://autobuild.buildroot.net/results/d7ec878907f714377c83e9a496e97cbf9382d787
    http://autobuild.buildroot.net/results/1c7f0c1b3ce4871cd87bd6059b1f0a6dc4e74a9c
    http://autobuild.buildroot.net/results/196b81d580325607c8da90beeb79e1f6b8ab8b47
    http://autobuild.buildroot.net/results/f90f7b4ac710b56686635f8ae27059c11b963e47

1. 60c26e4c4f

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/tpm2-tss/0001-Temporary-fix-for-build-without-C.patch

@@ -0,0 +1,44 @@
+From 158d0bc3a2a7a93090cc12c5b0dd3c27e6f44d61 Mon Sep 17 00:00:00 2001
+From: Carlos Santos <unixmania@gmail.com>
+Date: Mon, 23 Dec 2019 08:02:19 -0300
+Subject: [PATCH] Temporary fix for build without C++
+
+C++ is required only for the fuzzing tests but AC_PROG_CXX is included
+by configure.ac even when fuzzing is not enabled (which we don't do on
+Buildroot).
+
+The patch applied upstream had issues and was reverted[1]. Use a local
+patch to solve the problem temporaryly.
+
+Fixes:
+    http://autobuild.buildroot.net/results/13f5e37b47b255da4158bec34e5459136f7e60d4
+    http://autobuild.buildroot.net/results/1c26db2509c79e00c0de1165945277eaa57b149f
+    http://autobuild.buildroot.net/results/b7b6b7b7aca79e847b442cbd2305427d91fe5d70
+    http://autobuild.buildroot.net/results/1cd5a82a0e799aa5027e2e2c03b246332cc3a15d
+    http://autobuild.buildroot.net/results/d7ec878907f714377c83e9a496e97cbf9382d787
+    http://autobuild.buildroot.net/results/1c7f0c1b3ce4871cd87bd6059b1f0a6dc4e74a9c
+    http://autobuild.buildroot.net/results/196b81d580325607c8da90beeb79e1f6b8ab8b47
+    http://autobuild.buildroot.net/results/f90f7b4ac710b56686635f8ae27059c11b963e47
+
+1. https://github.com/tpm2-software/tpm2-tss/commit/60c26e4c4faba6ba12469485653e17092b510840
+
+Signed-off-by: Carlos Santos <unixmania@gmail.com>
+---
+ configure.ac | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index cd50451d..a3bd7144 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -25,7 +25,6 @@ AC_CANONICAL_HOST
+ AX_IS_RELEASE(dash-version)
+ AX_CHECK_ENABLE_DEBUG([info])
+ 
+-AC_PROG_CXX
+ AC_PROG_CC
+ AC_PROG_LN_S
+ AC_USE_SYSTEM_EXTENSIONS
+-- 
+2.18.1
+

package/tpm2-tss/tpm2-tss.mk

@@ -11,6 +11,8 @@ TPM2_TSS_LICENSE_FILES = LICENSE
 TPM2_TSS_INSTALL_STAGING = YES
 TPM2_TSS_DEPENDENCIES = liburiparser openssl host-pkgconf
 TPM2_TSS_CONF_OPTS = --with-crypto=ossl --disable-doxygen-doc --disable-defaultflags
+# 0001-configure-Only-use-CXX-when-fuzzing.patch
+TPM2_TSS_AUTORECONF = YES
 
 # uses C99 code but forgets to pass -std=c99 when --disable-defaultflags is used
 TPM2_TSS_CONF_ENV += CFLAGS="$(TARGET_CFLAGS) -std=c99"