libegt: Fix for cross-compile time detection of allocarray

kplot otherwise has runtime check for this, which fails when building
for say x86, since build host is also x86 it is able to run the runtime
testcode on build machine, but thats wrong, it should be either run
using qemu or not run at all, here we use configure time check to detect
reallocarray()

Signed-off-by: Khem Raj <[email protected]>

recipes-graphics/libegt/libegt/0001-check-for-reallocarray-before-using-it.patch

@@ -0,0 +1,54 @@
+From 6f0aafeccb99b6c92a48ee1c775afdc0f16a1ce6 Mon Sep 17 00:00:00 2001
+From: Khem Raj <[email protected]>
+Date: Fri, 13 Dec 2019 08:46:39 -0800
+Subject: [PATCH] check for reallocarray before using it
+
+in kplot there is a runtime check for reallocarray which actually wont
+work in cross compile mode, luckily it does check for HAVE_REALLOCARRAY
+before usng the results of runtime check. So here add a configure time
+check for presense of reallocarray
+
+Fixes
+
+TOPDIR/build/tmp/work/core2-32-yoe-linux/libegt/0.8-r0/recipe-sysroot/usr/include/stdlib.h:559:14: error: exception specification in declaration does not match previous declaration
+extern void *reallocarray (void *__ptr, size_t __nmemb, size_t __size)
+             ^
+../external/kplot/compat.h:24:7: note: previous declaration is here
+void *reallocarray(void *optr, size_t nmemb, size_t size);
+      ^
+
+Upstream-Status: Submitted [https://github.com/linux4sam/egt/pull/2]
+Signed-off-by: Khem Raj <[email protected]>
+---
+ configure.ac  | 2 +-
+ src/chart.cpp | 1 +
+ 2 files changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index 81410c78..65873d8b 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -210,7 +210,7 @@ AC_TYPE_UINT8_T
+
+ # Checks for library functions.
+ AC_FUNC_MMAP
+-AC_CHECK_FUNCS([floor memmove memset munmap select setlocale sqrt strerror])
++AC_CHECK_FUNCS([floor memmove memset munmap reallocarray select setlocale sqrt strerror])
+
+ AX_PTHREAD([LIBS="$PTHREAD_LIBS $LIBS"
+             CFLAGS="$CFLAGS $PTHREAD_CFLAGS"], AC_MSG_ERROR(Can not find pthreads.  This is required.))
+diff --git a/src/chart.cpp b/src/chart.cpp
+index 7578ea29..0faf65e8 100644
+--- a/src/chart.cpp
++++ b/src/chart.cpp
+@@ -3,6 +3,7 @@
+  *
+  * SPDX-License-Identifier: Apache-2.0
+  */
++#include "config.h"
+ #include "compat.h"
+ #include "egt/chart.h"
+ #include "egt/detail/meta.h"
+-- 
+2.24.1
+

recipes-graphics/libegt/libegt_0.8.bb

@@ -29,6 +29,7 @@ DEPENDS_append_at91sam9 = " tslib"
 
 SRC_URI = "gitsm://github.com/linux4sam/egt.git;protocol=https \
            file://0001-link-libudev-for-udev_unref-and-udev_new.patch \
+           file://0001-check-for-reallocarray-before-using-it.patch \
 "
 
 SRCREV = "be50eef497a0900cf90b60a2da4aad30ba0e3663"