From c267a71475e566ceabafce9e2f775e03b681bd4c Mon Sep 17 00:00:00 2001
From: Leo Yuriev <leo@yuriev.ru>
Date: Wed, 7 Mar 2018 13:31:33 +0300
Subject: [PATCH] mdbx: workaround for "alignment-reduction-ignored" lcc's bug.

Change-Id: I000bfaffd78ef7b6e27d6178bc2a5defc32cc357
---
 Makefile   |  8 ++++++++
 src/bits.h | 12 ++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/Makefile b/Makefile
index 44601a17..c434dbdd 100644
--- a/Makefile
+++ b/Makefile
@@ -26,6 +26,14 @@ CXX	?= g++
 XCFLAGS	?= -DNDEBUG=1 -DMDBX_DEBUG=0 -DLIBMDBX_EXPORTS=1
 CFLAGS	?= -O2 -g3 -Wall -Werror -Wextra -ffunction-sections -fPIC -fvisibility=hidden
 CFLAGS	+= -D_GNU_SOURCE=1 -std=gnu11 -pthread $(XCFLAGS)
+
+# temporary workaround for lcc's bug
+TARGET_ARCH_e2k = $(shell (export LC_ALL=C; ($(CC) --version 2>&1; $(CC) -v 2>&1) | grep -q -i 'e2k' && echo yes || echo no))
+ifeq ($(TARGET_ARCH_e2k),yes)
+TARGET_ARCH := e2k
+CFLAGS += -mtune=native -Wno-alignment-reduction-ignored
+endif
+
 CXXFLAGS = -std=c++11 $(filter-out -std=gnu11,$(CFLAGS))
 TESTDB	?= $(shell [ -d /dev/shm ] && echo /dev/shm || echo /tmp)/mdbx-check.db
 TESTLOG ?= $(shell [ -d /dev/shm ] && echo /dev/shm || echo /tmp)/mdbx-check.log
diff --git a/src/bits.h b/src/bits.h
index dcf12ec9..b22167c3 100644
--- a/src/bits.h
+++ b/src/bits.h
@@ -98,6 +98,18 @@
 #endif
 #endif /* -Wconstant-logical-operand */
 
+#if __has_warning("-Walignment-reduction-ignored") || defined(__e2k__) || defined(__ICC)
+#if defined(__ICC)
+#pragma warning(disable: 3453 1366)
+#elif defined(__clang__)
+#pragma clang diagnostic ignored "-Walignment-reduction-ignored"
+#elif defined(__GNUC__)
+#pragma GCC diagnostic ignored "-Walignment-reduction-ignored"
+#else
+#pragma warning disable "alignment-reduction-ignored"
+#endif
+#endif /* -Wno-constant-logical-operand */
+
 #include "./osal.h"
 
 /* *INDENT-ON* */