gcc: build version 10.2.0

- requires the patch 'gcc-10.2.0-cpp-__has_include.patch'

Programming/gcc/build

@@ -28,6 +28,9 @@ pbuild::pre_prep() {
 	if (( V_MAJOR == 5 )) || (( V_MAJOR == 6 )); then
 		pbuild::add_patch_Darwin "${V_MAJOR}/PR57438_avoiding_empty_function_bodies_and_trailing_labels.patch"
 	fi
+	if (( V_MAJOR == 10 && V_MINOR == 2 )); then
+		pbuild::add_patch "files/gcc-10.2.0-cpp-__has_include.patch"
+	fi
 }
 
 pbuild::pre_configure() {

Programming/gcc/files/gcc-10.2.0-cpp-__has_include.patch

+From b7bb13d4a5fcb593dc745ca3b6180f8babb54893 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Tiziano=20M=C3=BCller?= <tiziano.mueller@chem.uzh.ch>
+Date: Mon, 27 Jul 2020 15:40:38 +0200
+Subject: [PATCH] libcpp: fix __has_include handling with traditional-cpp
+
+fixes #95889
+---
+ libcpp/init.c        | 3 +++
+ libcpp/traditional.c | 4 +++-
+ 2 files changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/libcpp/init.c b/libcpp/init.c
+index 0aac5acd0a35..b0cf71192589 100644
+--- a/libcpp/init.c
++++ b/libcpp/init.c
+@@ -400,6 +400,9 @@ static const struct builtin_macro builtin_array[] =
+   B("__LINE__",		 BT_SPECLINE,      true),
+   B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL, true),
+   B("__COUNTER__",	 BT_COUNTER,       true),
++  /* Make sure to update the list of built-in
++     function-like macros in traditional.c:
++     fun_like_macro() when adding more following */
+   B("__has_attribute",	 BT_HAS_ATTRIBUTE, true),
+   B("__has_cpp_attribute", BT_HAS_ATTRIBUTE, true),
+   B("__has_builtin",	 BT_HAS_BUILTIN,   true),
+diff --git a/libcpp/traditional.c b/libcpp/traditional.c
+index 77adb3bf595f..b087072c9b4c 100644
+--- a/libcpp/traditional.c
++++ b/libcpp/traditional.c
+@@ -330,7 +330,9 @@ fun_like_macro (cpp_hashnode *node)
+ {
+   if (cpp_builtin_macro_p (node))
+     return (node->value.builtin == BT_HAS_ATTRIBUTE
+-	    || node->value.builtin == BT_HAS_BUILTIN);
++	    || node->value.builtin == BT_HAS_BUILTIN
++	    || node->value.builtin == BT_HAS_INCLUDE
++	    || node->value.builtin == BT_HAS_INCLUDE_NEXT);
+   return node->value.macro->fun_like;
+ }
+ 

Programming/gcc/files/variants.rhel6

@@ -36,3 +36,4 @@ gcc/9.2.0	stable		b:gmp/6.1.2-1 b:mpfr/4.0.2 b:mpc/1.1.0-3 b:isl/0.21
 gcc/9.3.0	stable		b:gmp/6.2.0 b:mpfr/4.0.2-1 b:mpc/1.1.0-4
 
 gcc/10.1.0	stable		b:gmp/6.2.0 b:mpfr/4.0.2-1 b:mpc/1.1.0-4
+gcc/10.2.0	unstable	b:gmp/6.2.0 b:mpfr/4.0.2-1 b:mpc/1.1.0-4